CN114685203A - Aerobic composting method - Google Patents
Aerobic composting method Download PDFInfo
- Publication number
- CN114685203A CN114685203A CN202210611799.2A CN202210611799A CN114685203A CN 114685203 A CN114685203 A CN 114685203A CN 202210611799 A CN202210611799 A CN 202210611799A CN 114685203 A CN114685203 A CN 114685203A
- Authority
- CN
- China
- Prior art keywords
- film
- fermentation device
- covered
- fermentation
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/70—Controlling the treatment in response to process parameters
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/10—Addition or removal of substances other than water or air to or from the material during the treatment
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/10—Addition or removal of substances other than water or air to or from the material during the treatment
- C05F17/15—Addition or removal of substances other than water or air to or from the material during the treatment the material being gas
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/60—Heating or cooling during the treatment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
The invention provides an aerobic composting method, which comprises the following steps of S1: adding materials into the current film-covered fermentation device, adding microbial flora for fermentation when the temperature of the materials is above a freezing point, and sending a first signal when a temperature and humidity monitoring unit detects that the temperature/humidity reaches a preset condition; step S2: adding materials into the next film-coated fermentation device, and sending a second signal by the weight monitoring unit when detecting that the materials are added; step S3: when the control system receives the first signal and the second signal at the same time, the control system controls the circulating system to form a circulating passage, and microbial floras are added for fermentation when the temperature of the material in the next film-covered fermentation device is above the freezing point; step S4: the odor concentration monitoring unit sends a third signal when detecting that the odor concentration reaches a preset condition, and the control system conveys tail gas to the odor treatment system when the circulation passage is closed and receives the third signal. The aerobic composting method saves energy, improves fermentation efficiency and reduces odor emission.
Description
Technical Field
The invention relates to the technical field of composting, in particular to an aerobic composting method.
Background
With the rapid development of economy, the problem of environmental pollution caused by unreasonable treatment of organic solid wastes such as livestock and poultry manure and straws is more and more prominent, and how to effectively, rapidly and inexpensively treat the organic solid wastes and carry out resource utilization becomes a research hotspot. Compared with the defects of large investment, high operation cost, high energy consumption, complex maintenance and the like of trough type composting and reactor type composting, the high-temperature aerobic membrane-covering fermentation technology has the characteristics of good environmental protection, less investment, simple and convenient operation, low treatment cost, good decomposition effect and the like, so that the high-temperature aerobic membrane-covering fermentation technology becomes an advanced technology which can simultaneously meet the requirements of stabilization, reduction, harmlessness and recycling in waste treatment technologies.
In the high-temperature aerobic fermentation process, the temperature of the compost, the water activity of the material and the oxygen content in the compost are key factors influencing the activity of microorganisms in the compost, so that the composting rate and the composting quality are directly influenced, and the odor removal efficiency and the carbon fixation rate are also related. In alpine regions, the initial temperature of organic solid waste is below zero under ordinary conditions, no microorganism can normally metabolize under the condition that water is frozen, the frozen solid waste is placed into a film covering system, indigenous microorganisms in a stack or microorganisms added from an external source cannot start a temperature rise process, the initial temperature is usually applied to the film covering system through various external heating measures, and at the moment, additional heating equipment is needed and additional electric energy is needed.
The high-performance membrane material covered by the membrane covering system has a molecular filtration microporous structure, so that the outward diffusion of peculiar smell can be effectively controlled, meanwhile, air molecules and water vapor molecules in the pile can normally pass through, external water molecules cannot enter, and fermentation conditions required for converting waste into high-quality compost by microorganisms in a short time are formed in the membrane. However, ammonia, nitrous oxide, carbon dioxide, low carbon alkane and the like are smaller than the micro-pore diameter of the membrane, and can still diffuse to the outside of the membrane under the action of pressure difference, and the deodorization can only reach about 90% in the composting process. At present, for environmental control gas (such as ammonia gas), hydrophilic treatment is mainly performed on the inner side of a membrane, so that water vapor is gathered at non-porous parts on the membrane to form water, and the water is dripped back to a stacking material along with water by utilizing the characteristic that the ammonia gas is very soluble in water, and is further fixed in a fermentation material by microorganisms. However, the process is influenced by various factors, meanwhile, nitrous oxide, low-carbon alkane and other non-water-soluble greenhouse gases are discharged out of the membrane, the emission reduction effect is only about 50%, resource waste (such as nutrient and carbon waste) is caused, and the effects of deodorization, emission reduction and the like are limited to a certain extent.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide an aerobic composting method, which utilizes thermal circulation to heat materials to be fermented and the internal environment thereof, saves energy, shortens the preheating period, improves the fermentation efficiency and the carbon fixation rate, and reduces the treatment difficulty of irritant gases and the emission of greenhouse gases.
The invention provides an aerobic composting method, which comprises the following steps:
step S1: adding materials into the current film-covered fermentation device, uniformly adding microbial floras for fermentation when the temperature of the materials is above a freezing point, and sending a first signal to a control system by a temperature and humidity monitoring unit when detecting that the temperature and/or the humidity in the current film-covered fermentation device reach preset conditions;
step S2: adding materials into the next film-covered fermentation device, and sending a second signal to the control system by the weight monitoring unit when detecting that the materials are added into the next film-covered fermentation device;
step S3: when receiving the first signal and the second signal at the same time, the control system controls the circulating system to form a circulating path between the current film-covered fermentation device and the next film-covered fermentation device, and microbial floras are uniformly added for fermentation when the temperature of the material in the next film-covered fermentation device is above the freezing point;
step S4: the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the film covering fermentation device reaches a preset condition, and the control system conveys tail gas in the film covering fermentation device to the odor treatment system when the circulation passage is closed and receives the third signal.
Further, step S1 further includes: and the control system controls the circulating system to circularly convey the hot and humid gas in the current film-covered fermentation device to the current film-covered fermentation device when receiving the first signal.
The microbial flora and the fermentation method added in the film-covering fermentation are not strictly limited, and the conventional microbial flora and aerobic composting fermentation method in the field can be adopted. Specifically, the microbial flora comprises an exogenous cold-resistant microbial flora and a medium-high temperature microbial flora, and the fermentation process comprises the following steps: when the temperature of the material is 0-25 ℃, firstly, the exogenous cold-resistant microbial flora is utilized for fermentation and heating, and the medium-high temperature microbial flora is gradually started for heating fermentation in the heating process.
The present invention is not limited to a system for carrying out the aerobic composting process described above. Specifically, a membrane-covered fermentation system can be adopted for aerobic composting, the membrane-covered fermentation system comprises a control system, a circulation system, an odor treatment system and more than two membrane-covered fermentation devices, a temperature and humidity monitoring unit, a weight monitoring unit and an odor concentration monitoring unit are arranged on each membrane-covered fermentation device, the temperature and humidity monitoring unit sends a first signal to the control system when detecting that the temperature and/or the humidity in the current membrane-covered fermentation device reach preset conditions, the weight monitoring unit sends a second signal to the control system when detecting that materials are added into the next membrane-covered fermentation device, the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the membrane-covered fermentation device reaches the preset conditions, the control system controls the circulation system to form a circulation path between the current membrane-covered fermentation device and the next membrane-covered fermentation device when receiving the first signal and the second signal simultaneously, and the control system conveys the tail gas in the film-covered fermentation device to the odor treatment system when the circulation passage is closed and receives a third signal.
The film-covered fermentation system comprises more than two film-covered fermentation devices, wherein the first film-covered fermentation device is the first device for performing film-covered fermentation, the current film-covered fermentation device is the device for performing film-covered fermentation, and the next film-covered fermentation device is the device for performing film-covered fermentation. The moist heat gas may generate condensed water in the circulation process, so that the circulation passage can be subjected to heat preservation treatment, and in order to reduce the influence of the low-temperature environment on the circulation passage, the next film-covered fermentation device is preferentially selected for circulation, namely the current film-covered fermentation bin is next to the next film-covered fermentation bin. Some substances (such as ammonia gas and the like) can be dissolved in the condensed water, and the condensed water which is not discharged can return to the material pile to be fermented for continuous fermentation, so that the fermentation quality of the material pile can be improved.
The film-covered fermentation system mainly uses damp and hot gas generated by the current film-covered fermentation device in the film-covered fermentation process to heat and humidify materials in the next film-covered fermentation device. On one hand, the moist heat gas is recycled, so that the fermentation is heated without extra measures such as electric power and the like, and heat energy which is not dissipated can break through the freezing point of the material to be fermented and continuously supply heat, so that medium-high temperature microbial flora is rapidly fermented in a high-temperature period in advance, thereby saving energy, improving the fermentation efficiency and reducing the loss of effective substances; on the other hand, moisture in the humid hot gas can utilize the steam circulation to realize the make full use of the inside moisture of system for the fermentation need not extra moisturizing, has further saved the energy, and the volatile nitrogen of the water of being easily dissolved is better detained in waterproof moisture permeable membrane simultaneously, is showing and is reducing the nitrogen loss, and circulation steam is in coordination with waterproof moisture permeable membrane, according to the orderly control moisture escape of fermentation state, can rationally control the mummification degree of material, regulation and control fermentation period, and then realizes abundant fermentation. The circulation mode can promote the fermentation reaction in the next film-covered fermentation device, so that the film-covered fermentation device can reach the lowest reaction condition as early as possible, and the overall fermentation efficiency is increased, thereby quickly reaching the high-temperature stage of composting, improving the carbon fixation rate, avoiding excessive consumption and reducing the emission of greenhouse gases; meanwhile, pungent odor gas generated in the fermentation process of the current film-covered fermentation device is circulated to the next film-covered fermentation device and can be continuously degraded through fermentation reaction, so that the overall yield of the pungent gas is reduced, and the loss of useful components is reduced; in addition, the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the film covering fermentation device reaches a preset condition, and the control system conveys tail gas in the film covering fermentation device to the odor treatment system when the circulation passage is closed and receives the third signal, so that the generation of irritant odor and the emission of greenhouse gases are more effectively reduced.
Further, the control system controls the circulating system to circularly convey the hot and humid gas in the current film-covered fermentation device to the current film-covered fermentation device when receiving the first signal.
In above-mentioned tectorial membrane fermentation system, the circulation system not only can realize the damp and hot gas circulation function between a plurality of tectorial membrane fermentation devices, can also realize tectorial membrane fermentation device damp and hot gas's self-loopa function simultaneously, can adjust the temperature and the humidity distribution of the inside different positions of tectorial membrane fermentation device through damp and hot gas self-loopa to realize self heat energy, moisture, do not utilize the make full use of oxygen and volatile substances.
The structure of the circulation system is not particularly limited as long as the circulation function can be achieved. In one embodiment, the circulating system may include a fan, the fan is communicated with each film-covered fermentation device through an air inlet pipe and an air outlet pipe, valves are respectively arranged on the air inlet pipe and the air outlet pipe, and the control system is connected with the valves to control the circulating system; at the moment, the control system can realize the cyclic utilization of the wet and hot gas in the film covering fermentation device by the circulating system by only controlling each valve. In addition, the circulating system can also comprise a plurality of ventilation pipes distributed in each film-covered fermentation device, the ventilation pipes are respectively communicated with the air inlet pipe, and each ventilation pipe is provided with a plurality of ventilation holes; in this case, the circulation system also has a self-circulation function.
The structure of the control system is not strictly limited as long as the control function can be realized. In an embodiment, the control system may include a PLC controller, the PLC controller may be connected to the fan through a frequency converter, the PLC controller is connected to the touch screen or connected to the smart phone through the data transmission unit and the cloud server, and the cloud server is connected to the GPS positioning module. At the moment, the rotating speed of the fan can be changed by utilizing variable frequency speed regulation, so that the air quantity of the fan can be favorably changed according to actual needs, the operation energy consumption is least, and the comprehensive benefit is highest; it can be understood that the control system controls each valve in the circulating system according to the data transmitted by the temperature and humidity monitoring unit.
The film-covered fermentation device is mainly used for high-temperature aerobic fermentation (namely aerobic composting), the specific structure of the film-covered fermentation device is not strictly limited, and the film-covered fermentation device which is conventional in the field can be adopted. Specifically, tectorial membrane fermenting installation includes air film fermentation storehouse, the opening part in air film fermentation storehouse is stamped waterproof moisture-permeable membrane, this tectorial membrane fermenting installation does not need complicated structural component (like reation kettle, fermentation cylinder, civil engineering fermentation room etc.), even use the rainwater in the open air and can't get into the membrane, this waterproof moisture-permeable membrane can effectively obstruct foul smell macromolecule, pathogenic bacteria, dust etc. simultaneously, and allow the vapor that is less than membrane nanometer micropore footpath to permeate, can change the liquid phase water in the windrow into gaseous phase water drainage membrane in order under the pressure-fired effect, make the mummification of fermentation product.
The specific material of the waterproof moisture-permeable membrane is not strictly limited, for example, an expanded polytetrafluoroethylene membrane (i.e. an e-PTFE membrane) can be selected, the expanded polytetrafluoroethylene membrane has a fibril-like microporous structure, the diameter of each micropore is hundreds of times smaller than the diameter of a water molecule and tens of thousands of times larger than a water vapor molecule, water vapor can pass through the micropore structure, meanwhile, water drops cannot pass through the micropore structure, and the micropore structure can achieve excellent waterproof, moisture-permeable and odor-resistant functions; in addition, the waterproof moisture-permeable film has extremely fine holes and longitudinally irregular bent arrangement, so that wind cannot penetrate through the film, and the film has the characteristics of wind resistance, heat retention and the like. The waterproof moisture-permeable membrane has small aperture, uniform distribution and large porosity, and can filter all dust particles including bacteria while keeping the air circulation, thereby achieving the purposes of purification and ventilation.
The odor concentration monitoring unit is mainly used for monitoring the odor concentration in the film covering fermentation device and sending a third signal to the control system when the odor concentration reaches a preset condition; the specific structure of the odor concentration monitoring unit is not strictly limited as long as the above-described odor concentration monitoring related function can be realized, and conventional odor concentration monitoring equipment in the art can be adopted.
Furthermore, an electric heater is arranged on the first film-covered fermentation device. When the film covering fermentation system is started, if the material in the first film covering fermentation device is below the freezing point, the metabolic activity of microorganisms is blocked, and at the moment, external heat needs to be properly provided to melt the material and raise the material to above the freezing point, so that heating devices such as an electric heater can be arranged on the first film covering fermentation device as required to raise the temperature of the material to above the freezing point.
The implementation of the invention has at least the following advantages:
1. according to the aerobic composting method, the wet and hot gas generated by the current film-covered fermentation device in the film-covered fermentation process is used for heating the material in the next film-covered fermentation device, so that the problems of low initial reaction temperature, difficult reaction and the like of stockpiles in low-temperature and high-cold areas can be solved well, the next film-covered fermentation device can reach the lowest reaction condition as early as possible, the fermentation efficiency is improved, the fermentation period is shortened, the carbon fixation rate is improved, and the formation of humus is facilitated;
2. the aerobic composting method can fully utilize the heat, water and unconsumed oxygen in the system by utilizing the damp-heat circulation, so that the fermentation can be realized without extra electric power and extra water, thereby not only saving energy, but also being beneficial to reasonably controlling the drying degree of materials, improving the carbon fixation rate, avoiding excessive consumption and reducing the emission of greenhouse gases;
3. the aerobic composting method can circulate the pungent odor gas generated in the fermentation process of the current film-covered fermentation device for many times, increase the reaction contact time, and can be continuously converted and degraded through microbial fermentation, thereby reducing the integral yield of the pungent gas, reducing the loss of useful components and improving the quality of the fermented product.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of a membrane-covered fermentation system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the self-circulation control logic of the membrane covered fermentation system in accordance with one embodiment of the present invention;
FIG. 3 is a schematic diagram of the single-bin circulation control logic of the membrane-covered fermentation system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a multi-chamber circulation control logic of the membrane-covered fermentation system according to an embodiment of the present invention.
Description of reference numerals:
11: a PLC controller; 12: a touch screen; 13: a data transmission unit; 14: a cloud server; 15: a smart phone; 16: a GPS positioning module;
21: a fan; 22: a valve; 23: a frequency converter;
3: an odor treatment system;
4: a film-covered fermentation device; 41: a temperature and humidity monitoring unit; 42: a weight monitoring unit; 43: an odor concentration monitoring unit; 44: an electric heater.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms also include the plural forms unless the context clearly dictates otherwise, and further, it is understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides an aerobic composting method, which comprises the following steps:
step S11: adding materials into the current film-covered fermentation device, uniformly adding microbial floras for fermentation when the temperature of the materials is above a freezing point, and sending a first signal to a control system by a temperature and humidity monitoring unit when detecting that the temperature and/or the humidity in the current film-covered fermentation device reach preset conditions;
step S12: adding materials into the next film-covered fermentation device, and sending a second signal to the control system by the weight monitoring unit when detecting that the materials are added into the next film-covered fermentation device;
step S13: when receiving the first signal and the second signal at the same time, the control system controls the circulating system to form a circulating path between the current film-covered fermentation device and the next film-covered fermentation device, and microbial floras are uniformly added for fermentation when the temperature of the material in the next film-covered fermentation device is above the freezing point;
step S14: the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the film-covered fermentation device reaches a preset condition, and the control system conveys tail gas in the film-covered fermentation device to the odor treatment system when the circulation passage is closed and receives the third signal.
Step S11 may further include: and the control system controls the circulating system to circularly convey the hot and humid gas in the current film-covered fermentation device to the current film-covered fermentation device when receiving the first signal.
In the aerobic composting method, the microbial flora can comprise an exogenous cold-resistant microbial flora and a medium-high temperature microbial flora; the fermentation process may include: when the temperature of the material is 0-25 ℃, firstly, the exogenous cold-resistant microbial flora is utilized for fermentation and heating, and the medium-high temperature microbial flora is gradually started for heating fermentation in the heating process.
The aerobic composting method of the embodiment can adopt a film-covered fermentation system to carry out aerobic composting. Referring to fig. 1 to 4, the film-covered fermentation system includes a control system, a circulation system, an odor treatment system 3 and two or more film-covered fermentation devices 4, wherein a temperature and humidity monitoring unit 41, a weight monitoring unit 42 and an odor concentration monitoring unit 43 are disposed on each film-covered fermentation device 4, the temperature and humidity monitoring unit 41 sends a first signal to the control system when detecting that the temperature and/or humidity in the current film-covered fermentation device 4 reaches a preset condition, the weight monitoring unit 42 sends a second signal to the control system when detecting that a material is added into the next film-covered fermentation device 4, the odor concentration monitoring unit 43 sends a third signal to the control system when detecting that the odor concentration in the film-covered fermentation device 4 reaches the preset condition, and the control system controls the circulation system to form a circulation path between the current film-covered fermentation device 4 and the next film-covered fermentation device 4 when receiving the first signal and the second signal simultaneously, when the circulation path is closed and the third signal is received, the control system conveys the tail gas in the film covering fermentation device 4 to the odor treatment system 3.
The film-covered fermentation device 4 is mainly used for aerobic composting of the compost, and the structure of the film-covered fermentation device is not strictly limited. In this embodiment, the film-covered fermentation device 4 includes a gas film fermentation chamber, and the opening of the gas film fermentation chamber is covered with a waterproof moisture-permeable film, and the waterproof moisture-permeable film can be, for example, an expanded polytetrafluoroethylene film. The film-covered fermentation device 4 has a simple structure, does not need complex structural components, can effectively block odor macromolecules, pathogenic bacteria, dust and the like through the waterproof moisture-permeable film, allows water vapor with the nanometer-scale micro-pore diameter smaller than that of the film to permeate, and has excellent waterproof, moisture-permeable and odor-resistant functions, and good windproof property and warmth retention property; in addition, under the action of micro-positive pressure, the waterproof moisture-permeable film can orderly convert liquid-phase water in the compost into gas-phase water to be discharged out of the film, so that the compost product is dried.
After the film-covered fermentation system is started, the first film-covered fermentation device 4 (i.e., the first film-covered fermentation device) firstly performs aerobic composting, if the material is below the freezing point, a heating device such as an electric heater 44 can be arranged on the first film-covered fermentation device 4, the electric heater 44 is used for melting and heating the material pile in the first film-covered fermentation device 4 to above the freezing point, an exogenous cold-resistant microbial flora is added to perform fermentation reaction at a temperature above 0 ℃, after the first film-covered fermentation device 4 is fermented and enters a heating stage, medium-high temperature microbial flora is gradually started to perform heating fermentation, and after the first film-covered fermentation device 4 enters a continuous high-temperature stage, the temperature and humidity monitoring unit 41 sends a first signal (such as a constant temperature signal) to the control system; at this time, the next film formation fermenter 4 (i.e., the second film formation fermenter) may be added.
When the material is fed into the next membrane-covered fermentation device 4, the weight monitoring unit 42 sends a second signal (i.e. a feeding signal) to the control system, since the compost in the next membrane-covered fermentation device 4 is in a low-temperature or even frozen state, almost all microorganisms are in a dormant or micro-metabolic state, the compost fermentation is in a stagnant or extremely slow state, and at this time, heat energy needs to be provided for the material to relieve the low-metabolic state of the microorganisms. When receiving a first signal and a second signal at the same time, the control system controls the circulating system to form a circulating passage between the current film-covered fermentation device 4 and the next film-covered fermentation device 4, the damp-heat gas in the current film-covered fermentation device 4 is circularly conveyed to the next film-covered fermentation device 4 through the circulating passage, so that heat, oxygen and moisture are provided for the stacked material in the next film-covered fermentation device 4, after the stacked material is heated to a temperature above a freezing point, the number of active live bacteria of indigenous microbial flora and exogenously added microbial flora (including exogenously cold-resistant microbial flora and medium-high temperature microbial flora) in the stacked material is increased, the metabolic capability is enhanced, the stacked material enters a continuous high-temperature stage after being heated, at the moment, the temperature and humidity monitoring unit 41 of the second film-covered fermentation device sends the first signal to the control system, and then the next film-covered fermentation device 4 (namely, the third film-covered fermentation device) can be continuously increased, in this case, the moist heat gas in the first and second film-covered fermenters may be circulated and transferred to the next film-covered fermenter 4 through the circulation passage.
The number of the film-covered fermentation devices 4 in the film-covered fermentation system is not strictly limited, and the next film-covered fermentation device 4 can be continuously increased according to the above manner, and the damp and hot gas in the current film-covered fermentation device 4 is circularly conveyed to the next film-covered fermentation device 4 through a circulating passage until all the film-covered fermentation devices 4 complete aerobic composting.
The film-covered fermentation system can realize the function of circulating the damp-heat gas between more than two film-covered fermentation devices 4, and the damp-heat gas generated by the current film-covered fermentation device 4 in the film-covered fermentation process is used for heating the material in the next film-covered fermentation device 4, so that extra electric power and water are not required to be provided, the energy is saved, the fermentation efficiency and the carbon fixation rate of the system are improved, excessive consumption is avoided, and the emission of greenhouse gas is reduced; meanwhile, the pungent odor gas generated by the current film-covered fermentation device 4 in the fermentation process is circulated to the next film-covered fermentation device 4 and can be continuously degraded through fermentation reaction, so that the overall yield of the pungent odor gas is reduced, the loss of useful components is reduced, and the fermentation quality of the stockpile is improved.
In the film-covered fermentation system, the humid hot gas can generate condensed water in the circulation process, so that the circulation passage can be subjected to heat preservation treatment; in addition, in order to reduce the influence of the low-temperature environment on the circulation path, the film-covered fermentation device 4 in the immediate vicinity may be selected to circulate, that is, the current film-covered fermentation device 4 is arranged in the immediate vicinity of the next film-covered fermentation device 4.
In addition, the control system controls the circulating system to circularly convey the humid hot gas in the current film-covered fermentation device 4 to the current film-covered fermentation device 4 when receiving the first signal. In this case, the circulation system can not only realize the function of circulating the moist heat gas among the plurality of film covered fermentation devices 4, but also realize the function of self-circulation of the moist heat gas of the film covered fermentation devices 4, and the temperature and the humidity distribution of different parts in the film covered fermentation devices 4 can be adjusted through the self-circulation of the moist heat gas, thereby realizing the full utilization of the self heat energy.
The circulation system is not limited in its structure as long as it can realize the above-described circulation function. In this embodiment, the circulation system may include a blower 21, the blower 21 is communicated with each of the film-covered fermentation devices 4 through an air inlet pipe and an air outlet pipe, valves 22 are respectively disposed on the air inlet pipe and the air outlet pipe, and the control system is connected to the valves 22 to control the circulation system. At this time, the control system can realize the recycling of the moist heat gas in the membrane-covered fermentation device 4 by the circulation system only by controlling the valves 22. In addition, the circulating system can also comprise a plurality of ventilation pipes distributed in each film-covered fermentation device 4, the ventilation pipes are respectively communicated with the air inlet pipe, and each ventilation pipe is provided with a plurality of ventilation holes; at this time, the circulation system can also realize a self-circulation function.
As shown in fig. 1, in the above-mentioned membrane-covered fermentation system, the control system may include a PLC controller 11 (abbreviated as PLC), the PLC controller 11 may be connected to the fan 21 through a frequency converter 23 so as to change the rotation speed of the fan 21 through variable-frequency speed regulation, and the PLC controller 11 may be further connected to the electric heater 44 of the first membrane-covered fermentation device 4; meanwhile, the PLC controller 11 may be connected to the touch screen 12, the PLC controller 11 may also be connected to the smart phone 15 through the data transmission unit 13 and the cloud server 14, and the cloud server 14 may be connected to the GPS positioning module 16. The film-covered fermentation device 4 forms a damp-heat gas passage with the fan 21 through the air inlet pipe and the air outlet pipe, and the control system controls each valve 22 in the circulating system according to data transmitted by the temperature and humidity monitoring unit 41.
The aerobic composting method of the embodiment heats the materials in the next membrane-covered fermentation device 4 by using the humid and hot gas generated by the current membrane-covered fermentation device 4 in the membrane-covered fermentation process, so that the problems of low initial reaction temperature, difficult reaction and the like of the stockpile in low-temperature and high-cold areas can be solved well, the next membrane-covered fermentation device 4 can reach the lowest reaction condition as early as possible, and the fermentation efficiency of the membrane-covered fermentation system is improved; meanwhile, the film-covered fermentation system can utilize the circulation of the damp-heat gas to fully utilize the heat and the moisture in the system, so that extra electric power and extra water supplement are not needed for fermentation, energy is saved, reasonable control of the drying degree of materials is facilitated, the carbon fixation rate is improved, excessive consumption is avoided, and the emission of greenhouse gas is reduced; in addition, the film-covered fermentation system can enable pungent odor gas generated in the fermentation process of the current film-covered fermentation device 4 to circulate to the next film-covered fermentation device 4, and can be continuously degraded through fermentation reaction, so that the overall yield of the pungent odor gas is reduced, the loss of useful components is reduced, and the quality of compost products is improved.
Example 2
The aerobic composting method of the embodiment is performed by using the film-covered fermentation system of embodiment 1, wherein the film-covered fermentation system comprises two film-covered fermentation devices, and the aerobic composting method comprises the following specific steps:
step S21: adding materials into the first film-covered fermentation device, uniformly adding microbial flora for fermentation when the temperature of the materials is above a freezing point, and sending a first signal to a control system by a temperature and humidity monitoring unit when detecting that the temperature and/or the humidity in the first film-covered fermentation device reach preset conditions;
step S22: adding materials into the second film-covered fermentation device, and sending a second signal to the control system by the weight monitoring unit when the weight monitoring unit detects that the materials are added into the second film-covered fermentation device;
step S23: when receiving the first signal and the second signal simultaneously, the control system controls the circulating system to form a circulating passage between the first film-covered fermentation device and the second film-covered fermentation device so as to circularly convey the humid hot gas in the first film-covered fermentation device to the second film-covered fermentation device, and microbial floras are added for fermentation when the temperature of materials in the second film-covered fermentation device is above the freezing point;
step S24: the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the first film-covered fermentation device and the second film-covered fermentation device reaches a preset condition, and the control system conveys tail gas in the first film-covered fermentation device and the second film-covered fermentation device to the odor treatment system when the circulation passage is closed and the third signal is received.
Specifically, referring to fig. 3, when the whole membrane-covered fermentation system is started, if the pile in the first membrane-covered fermentation device is below the freezing point, external source heat is properly provided by a heating device such as an electric heater, when the pile is frozen and melted, the temperature of the pile rises above the freezing point, the added exogenous cold-resistant microbial flora starts fermentation reaction at a temperature above 0 ℃, when the first membrane-covered fermentation device enters a temperature rise stage, the added medium-high temperature microbial flora is gradually started to carry out temperature rise fermentation, a temperature and humidity monitoring unit monitors the temperature of the reactor of the first membrane-covered fermentation device (i.e. the temperature of the first reactor), when the temperature rises to enter a continuous high temperature stage, and reaches a constant temperature, a temperature and humidity monitoring unit sends a signal (i.e. a first signal) to a PLC controller, and at this time, the first membrane-covered fermentation device can circularly convey the humid and hot gas to the first membrane-covered fermentation device through a self-circulation module, thereby adjust the humiture distribution of the different positions of first tectorial membrane fermenting installation, make full use of self heat energy.
In the process of newly adding the second film-covered fermentation device, almost all microorganisms are in a dormant or micro-metabolic state due to the fact that the compost is in a low temperature level (or even in an icing state), and the compost fermentation is in a stagnant or extremely slow state, and heat energy needs to be supplied to the material to relieve the micro-organism hypometabolic state. After the second film-covered fermentation device adds materials, the weight monitoring unit triggers and sends a signal (namely a second signal) to the PLC, and the reactor (namely the temperature of the second reactor) of the second film-covered fermentation device is started. When the PLC receives the first signal and the second signal simultaneously, the PLC controls the corresponding valve to be opened, a circulation passage is formed between the first film-covered fermentation device and the second film-covered fermentation device, the damp-heat gas in the first film-covered fermentation device is circularly conveyed into the second film-covered fermentation device through the circulation passage, so that the required oxygen and heat are provided for the materials in the second film-covered fermentation device, the temperature of the piled materials is raised to be above a freezing point, at the moment, microbial floras comprising an exogenous cold-resistant microbial floras and a medium-high temperature microbial floras are added, the exogenous cold-resistant microbial floras start reproductive metabolism, the temperature of the piled materials is raised, the medium-high temperature microbial floras are gradually started to be raised for fermentation in the temperature raising process, and when the piled materials in the second film-covered fermentation device are in a rapid temperature raising or continuous high-temperature stage, the self-circulation module of the second film-covered fermentation device can be started to fully utilize the self heat energy and the oxygen in the internal air, thereby saving energy consumption.
Example 3
The aerobic composting method of the embodiment is performed by using the film-covered fermentation system of embodiment 1, wherein the film-covered fermentation system comprises three film-covered fermentation devices, and the aerobic composting method comprises the following specific steps:
step S31: adding materials into the first film-covered fermentation device, uniformly adding microbial flora for fermentation when the temperature of the materials is above an ice point, and sending a first signal to a control system by a temperature and humidity monitoring unit when detecting that the temperature and/or the humidity in the first film-covered fermentation device reach a preset condition;
step S32: adding materials into the second film-covered fermentation device, and sending a second signal to the control system by the weight monitoring unit when the weight monitoring unit detects that the materials are added into the second film-covered fermentation device;
step S33: when receiving the first signal and the second signal simultaneously, the control system controls the circulating system to form a circulating path between the first film-covered fermentation device and the second film-covered fermentation device so as to circularly convey the damp-heat gas in the first film-covered fermentation device to the second film-covered fermentation device, and microbial flora is uniformly added for fermentation when the temperature of materials in the second film-covered fermentation device is above the freezing point;
step S34: the temperature and humidity monitoring unit sends a third signal to the control system when detecting that the temperature and/or the humidity in the second film-covered fermentation device reach a preset condition;
step S35: adding materials into the third film-covered fermentation device, and sending a fourth signal to the control system by the weight monitoring unit when the weight monitoring unit detects that the materials are added into the third film-covered fermentation device;
step S36: when receiving the first signal, the third signal and the fourth signal at the same time, the control system controls the circulating system to form a circulating path among the first film-covered fermentation device, the second film-covered fermentation device and the third film-covered fermentation device so as to circularly convey the damp-heat gas in the first film-covered fermentation device and the second film-covered fermentation device to the third film-covered fermentation device, and microbial floras are added for fermentation when the temperature of materials in the third film-covered fermentation device is above the freezing point;
step S37: the odor concentration monitoring unit sends a fifth signal to the control system when detecting that the odor concentration in the first film-covered fermentation device, the second film-covered fermentation device and the third film-covered fermentation device reaches a preset condition, and the control system conveys tail gas in the first film-covered fermentation device, the second film-covered fermentation device and the third film-covered fermentation device to the odor treatment system when the circulation passage is closed and receives the fifth signal.
Specifically, referring to fig. 4, after the first film-covered fermentation device is started, the temperature and/or humidity of the reactor of the ongoing film-covered fermentation device is monitored by the temperature and humidity monitoring unit, and when the reactor enters a continuous high-temperature stage through temperature rise, and the temperature reaches a relatively constant value, the temperature and humidity monitoring unit sends a first signal (namely a constant temperature signal) to the PLC controller, and at the moment, the first film-covered fermentation device can circularly convey the humid and hot gas to the first film-covered fermentation device through the self-circulation module, so that the temperature and humidity distribution of different parts of the first film-covered fermentation device is adjusted, and the heat energy of the first film-covered fermentation device is fully utilized.
After a second film-covered fermentation device is newly added and materials are added, a weight monitoring unit is triggered and sends a second signal (namely a feeding signal) to a PLC (programmable logic controller), the PLC simultaneously receives the first signal and the second signal and controls valves of the first film-covered fermentation device and the second film-covered fermentation device to be opened, a circulation passage is formed between the first film-covered fermentation device and the second film-covered fermentation device, moist heat gas in the first film-covered fermentation device is circularly conveyed into the second film-covered fermentation device through the circulation passage, after the temperature of stacked materials is raised to be above a freezing point, exogenous cold-resistant microbial floras start breeding metabolism and ferment temperature rise, medium-high temperature microbial floras are gradually started in the temperature rise process for temperature rise fermentation, and then the second film-covered fermentation device enters a continuous high-temperature stage through rapid temperature rise; if the temperature and humidity monitoring unit detects that the temperature of the first film-covered fermentation device is reduced, the PLC controller can control the valve to be closed at the moment, and the circulation path is stopped.
After the temperature of the second film-covered fermentation device is constant, the temperature and humidity monitoring unit sends a third signal (namely a constant temperature signal) to the PLC; meanwhile, after a third film-covered fermentation device is newly added and materials are added, the weight monitoring unit triggers and sends a fourth signal (namely a feeding signal) to the PLC, when the PLC receives the first signal, the third signal and the fourth signal at the same time, the PLC controls the valves of the first film-covered fermentation device, the second film-covered fermentation device and the third film-covered fermentation device to be opened, a circulation passage is formed among the first film-covered fermentation device, the second film-covered fermentation device and the third film-covered fermentation device at the moment, and the damp-heat gas in the first film-covered fermentation device and the second film-covered fermentation device is circularly conveyed to the third film-covered fermentation device through the circulation passage, after the temperature of the stockpile is raised to be above the freezing point, the exogenous cold-resistant microbial flora starts reproduction and metabolism and fermentation is raised, gradually starting the medium-high temperature microbial flora in the temperature rise process for temperature rise fermentation, and then rapidly raising the temperature of the third film-covered fermentation device to enter a continuous high-temperature stage; if the temperature and humidity monitoring unit detects that the temperature of the current film-covered fermentation device performing aerobic composting is reduced, the PLC controller controls the corresponding valve to be closed at the moment, and the circulation path is terminated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An aerobic composting method is characterized by comprising the following steps:
step S1: adding materials into the current film-covered fermentation device, uniformly adding microbial floras for fermentation when the temperature of the materials is above a freezing point, and sending a first signal to a control system by a temperature and humidity monitoring unit when detecting that the temperature and/or the humidity in the current film-covered fermentation device reach preset conditions;
step S2: adding materials into the next film-covered fermentation device, and sending a second signal to the control system by the weight monitoring unit when detecting that the materials are added into the next film-covered fermentation device;
step S3: when the control system receives the first signal and the second signal at the same time, the control system controls the circulating system to form a circulating path between the current film-covered fermentation device and the next film-covered fermentation device, and microbial floras are uniformly added for fermentation when the temperature of materials in the next film-covered fermentation device is above the freezing point;
step S4: the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the film-covered fermentation device reaches a preset condition, and the control system conveys tail gas in the film-covered fermentation device to the odor treatment system when the circulation passage is closed and receives the third signal.
2. The aerobic composting method as claimed in claim 1, wherein step S1 further comprises: and the control system controls the circulating system to circularly convey the hot and humid gas in the current film-covered fermentation device to the current film-covered fermentation device when receiving the first signal.
3. The aerobic composting method of claim 1 wherein the microbial flora comprises exogenous cold-resistant microbial flora and medium-high temperature microbial flora, and the fermentation process comprises: when the temperature of the material is 0-25 ℃, firstly, the exogenous cold-resistant microbial flora is utilized for fermentation and heating, and the medium-high temperature microbial flora is gradually started for heating fermentation in the heating process.
4. The aerobic composting method as claimed in claim 1, wherein a membrane covering fermentation system is used for aerobic composting, the membrane covering fermentation system comprises a control system, a circulation system, an odor treatment system and more than two membrane covering fermentation devices, a temperature and humidity monitoring unit, a weight monitoring unit and an odor concentration monitoring unit are arranged on each membrane covering fermentation device, the temperature and humidity monitoring unit sends a first signal to the control system when detecting that the temperature and/or the humidity in the current membrane covering fermentation device reach a preset condition, the weight monitoring unit sends a second signal to the control system when detecting that materials are added into the next membrane covering fermentation device, the odor concentration monitoring unit sends a third signal to the control system when detecting that the odor concentration in the membrane covering fermentation device reaches the preset condition, and the control system controls the circulation system to form circulation between the current membrane covering fermentation device and the next membrane covering fermentation device when receiving the first signal and the second signal simultaneously And the control system is used for conveying the tail gas in the film-covered fermentation device to the odor treatment system when the circulation passage is closed and receives the third signal.
5. The aerobic composting method as claimed in claim 4, wherein the control system controls the circulation system to circulate the humid hot gas in the current membrane covered fermentation device to the current membrane covered fermentation device when receiving the first signal.
6. The aerobic composting method as claimed in claim 4, wherein the circulation system comprises a blower, the blower is connected to each membrane covered fermentation device through an air inlet pipe and an air outlet pipe, valves are respectively provided on the air inlet pipe and the air outlet pipe, and a control system is connected to each valve to control the circulation system.
7. The aerobic composting method as claimed in claim 6, wherein the control system comprises a PLC controller, the PLC controller is connected with the fan through a frequency converter, the PLC controller is connected with the touch screen or connected with the smart phone through a data transmission unit and a cloud server, and the cloud server is connected with a GPS positioning module.
8. The aerobic composting method as claimed in claim 4, wherein the film-covered fermentation device comprises an air film fermentation chamber, and the opening of the air film fermentation chamber is covered with a waterproof moisture-permeable film.
9. The aerobic composting method as claimed in claim 4, wherein an electric heater is provided on the first membrane covered fermentation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611799.2A CN114685203A (en) | 2022-06-01 | 2022-06-01 | Aerobic composting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210611799.2A CN114685203A (en) | 2022-06-01 | 2022-06-01 | Aerobic composting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114685203A true CN114685203A (en) | 2022-07-01 |
Family
ID=82131143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210611799.2A Pending CN114685203A (en) | 2022-06-01 | 2022-06-01 | Aerobic composting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114685203A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451129A (en) * | 2013-07-16 | 2013-12-18 | 承德市畜牧研究所 | Fermentation bacteria agent and fermentation method of excrements of livestock and poultry |
| CN106747690A (en) * | 2017-02-16 | 2017-05-31 | 江苏里下河地区农业科学研究所 | A kind of cow dung compost promotees rotten guarantor nitrogen microbial inoculum and application process |
| CN109627058A (en) * | 2019-01-03 | 2019-04-16 | 广西益江环保科技股份有限公司 | A kind of organic waste aerobic fermentation system and method for intelligentized control method |
| CN109678622A (en) * | 2019-01-11 | 2019-04-26 | 上海淘钿农业生物科技有限公司 | A kind of method of the derivative organic fertilizer of straw refuse harmless treatment |
| KR102159585B1 (en) * | 2020-01-23 | 2020-09-25 | 주식회사 해창 | Eco-Friendly Smart Organic Waste Disposal Treatment System And Method of Operation Thereof |
| CN214457684U (en) * | 2021-03-30 | 2021-10-22 | 深高蓝德环保科技集团股份有限公司 | Film-covered cover plate strip stacking type odorless composting device |
| CN114350500A (en) * | 2022-03-18 | 2022-04-15 | 领先生物农业股份有限公司 | Membrane-covered aerobic fermentation circulating device and circulating method |
-
2022
- 2022-06-01 CN CN202210611799.2A patent/CN114685203A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451129A (en) * | 2013-07-16 | 2013-12-18 | 承德市畜牧研究所 | Fermentation bacteria agent and fermentation method of excrements of livestock and poultry |
| CN106747690A (en) * | 2017-02-16 | 2017-05-31 | 江苏里下河地区农业科学研究所 | A kind of cow dung compost promotees rotten guarantor nitrogen microbial inoculum and application process |
| CN109627058A (en) * | 2019-01-03 | 2019-04-16 | 广西益江环保科技股份有限公司 | A kind of organic waste aerobic fermentation system and method for intelligentized control method |
| CN109678622A (en) * | 2019-01-11 | 2019-04-26 | 上海淘钿农业生物科技有限公司 | A kind of method of the derivative organic fertilizer of straw refuse harmless treatment |
| KR102159585B1 (en) * | 2020-01-23 | 2020-09-25 | 주식회사 해창 | Eco-Friendly Smart Organic Waste Disposal Treatment System And Method of Operation Thereof |
| CN214457684U (en) * | 2021-03-30 | 2021-10-22 | 深高蓝德环保科技集团股份有限公司 | Film-covered cover plate strip stacking type odorless composting device |
| CN114350500A (en) * | 2022-03-18 | 2022-04-15 | 领先生物农业股份有限公司 | Membrane-covered aerobic fermentation circulating device and circulating method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106495945B (en) | A kind of method that soil conditioner is quickly prepared using municipal sludge | |
| CN103242073B (en) | A kind of slot type aerobic compost foul smell reduces discharging, collects and treatment process | |
| WO2018014757A1 (en) | Method for preparing aerobic compost having kitchen waste organic matters | |
| CN105110834B (en) | A kind of organic solid waste compost device of double-deck material circulating ventilation and the method that compost is carried out using the device | |
| CN103864275A (en) | Bio-drying and dehumidifying coupled heat-pump flap tower type sludge drying process and system thereof | |
| CN116854327A (en) | Treatment method for drying and stabilizing organic sludge | |
| CN107211902B (en) | Method for preparing cow bedding by recycling cow dung under sub-low temperature condition | |
| WO2018014754A1 (en) | Efficient aerobic composting technology for kitchen garbage | |
| CN111908756B (en) | Treatment method for efficiently and stably treating municipal sludge | |
| CN105967780A (en) | Technical method for producing organic fertilizer by using solid waste in septic tank | |
| CN110813989A (en) | Rapid directional humification fermentation method for household organic garbage | |
| CN114350500B (en) | Membrane-covered aerobic fermentation circulating device and circulating method | |
| CN112521187A (en) | Method for rapidly composting and decomposing kitchen waste | |
| CN114685203A (en) | Aerobic composting method | |
| CN209307243U (en) | Horizontal spiral stirs solar energy aerobic composting device | |
| CN115784545A (en) | Method and device for drying and sterilizing livestock excrement by utilizing fermentation thermal coupling intermittent negative pressure | |
| CN106145585A (en) | Effectively compound microbial excrement dirt treatment agent and preparation method thereof | |
| CN104261920A (en) | Method for accelerating aerobic composting rate of agricultural solid wastes | |
| CN107814469A (en) | A kind of biological dewatered method of city sludge | |
| CN115160081A (en) | Composting method suitable for low-temperature environment | |
| CN104762237B (en) | A kind of anaerobic digestion of kitchen wastes quickly starts and the microbial inoculum of Effec-tive Function | |
| CN107030095B (en) | A kind of domestic waste desiccation dewatering | |
| Molnar et al. | Factors influencing solid-state anaerobic digestion | |
| CN113830990A (en) | Sludge heat energy and biological energy integrated drying and dewatering system and method | |
| CN112661539A (en) | Microporous black film aerobic fermentation composting process and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220701 |