CN110698011A - Sludge treatment method for biological wastewater treatment - Google Patents
Sludge treatment method for biological wastewater treatment Download PDFInfo
- Publication number
- CN110698011A CN110698011A CN201910981206.XA CN201910981206A CN110698011A CN 110698011 A CN110698011 A CN 110698011A CN 201910981206 A CN201910981206 A CN 201910981206A CN 110698011 A CN110698011 A CN 110698011A
- Authority
- CN
- China
- Prior art keywords
- sludge
- wastewater
- mud
- treatment
- quicklime
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Molecular Biology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment Of Sludge (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a sludge treatment method for biological wastewater treatment, and particularly relates to the field of sludge treatment, wherein the sludge treatment method comprises the following specific treatment steps: step one, separating mud from water; step two, sand and stone separation; step three, fermentation; step four, mixing; step five, dewatering and compacting; step six, drying and hardening; and step seven, crushing for use. The stone separation step can ensure the influence of sundries or broken stones in the sludge on the appearance of the later-stage mud cake during preparation, ensure the complete appearance of the formed mud cake, avoid the defect of the compaction degree of the mud cake caused by the doping of hard sundries and influence on the forming or transportation of the later-stage mud cake, the mixing step can remove the odor and the peculiar smell in the sludge by the reaction of the quicklime and the hydrogen sulfide gas, and the mud cake doped with the quicklime has better integrity after hardening, is not easy to generate fragments and is convenient to store and transport.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge treatment method for biological wastewater treatment.
Background
The biological treatment of waste water is a waste water treatment method which converts organic pollutants in a solution, colloid and fine suspension state in the waste water into stable and harmless substances through the metabolism of microorganisms. The biological treatment method can be divided into two types of aerobic biological treatment and anaerobic biological treatment, depending on the microorganism used. Biological treatment of wastewater is widely used as an aerobic biological treatment method, and conventionally, the aerobic biological treatment method is classified into an activated sludge method and a biofilm method. The activated sludge process is itself a treatment unit that has a variety of operating modes. The treatment equipment belonging to the biomembrane method comprises a biofilter, a biological rotating disk, a biological contact oxidation pond, a biological fluidized bed and the like.
The problem of sludge treatment in wastewater is a very troublesome problem for the management and operating personnel in the wastewater treatment process, although there are several approaches in the prior art: firstly, landfill is carried out; secondly, preparing fertilizer, namely dehydrating and drying sludge under the condition of meeting the sludge agricultural limit value specified by the state, adding a certain nutrient, and packaging and selling; thirdly, the method is used for the mixed coal incineration of the power plant; fourthly, the method is used for sea reclamation; because the landfill needs a large amount of mechanical transportation and burial, and because of poor dehydration, the compaction is not easy, and the economic benefit can not be generated, the method has low popularization degree; the coal-doped incineration in the power plant is a more environment-friendly treatment mode, but has the defect of low cost performance; the secondary pollution of seawater is easily caused by filling the sludge into the sea, so the method is not advocated.
The sludge fertilizer preparation is a common sludge treatment means, and still has more defects, such as generation of hydrogen sulfide and other odor gases in the sludge digestion process to pollute the air environment of a processing site, and the digested sludge still has malodor and is inconvenient to store; and the digested sludge is not good in integrity and insufficient in hardness after being pressed into mud cakes, so that the situation that the mud cakes are cracked or are not uniform in shape in the transportation process often occurs, and the storage or the transportation of the mud cakes are not facilitated.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a sludge treatment method for biological wastewater treatment, the influence of impurities or broken stones in sludge on the appearance of the sludge cake in the later period can be ensured through a stone separation step, the complete appearance of the formed sludge cake is ensured, the defect of insufficient compactness of the sludge cake caused by the doping of hard impurities is avoided, the forming or transportation of the sludge cake in the later period is influenced, the mixing step can utilize the reaction of quicklime and water and the reaction of the quicklime and hydrogen sulfide gas to remove the odor and the peculiar smell in the sludge, and the sludge cake doped with the quicklime has better integrity after being hardened, is not easy to generate fragments and is convenient to store and transport.
In order to achieve the purpose, the invention provides the following technical scheme: a sludge treatment method for biological wastewater treatment comprises the following specific treatment steps:
step one, mud-water separation: a user can take out part of sludge by using a mechanical excavation mode, then the residual wastewater is filtered by using a fine grid net, the residual sludge is separated from the wastewater, and the separated wastewater can be independently subjected to a sewage treatment process;
step two, sand and stone separation: putting the sludge separated in the step one on a vibrating screen machine for screening, leaving fluid sludge along screen holes of the vibrating screen machine, leaving sundries or gravel with large block diameters on the top of the vibrating screen machine, washing the separated sundries and gravel by using the wastewater in the step one, washing by using partial clear water, collecting the washing water and the sewage for centralized treatment, and recycling the washed gravel, wherein the washing method can reduce the use amount of the clear water, thereby reducing the generation amount of the sewage;
step three, fermentation: putting the sludge with impurities separated in the step two into a digestion tank, and performing digestion treatment on the sludge by using an aerobic/anaerobic fermentation treatment method of microorganisms, wherein particularly under the condition of isolating oxygen, organic matters in the sludge are firstly metabolized by saprophytic bacteria and are converted into organic acid which is easier to be absorbed by plant roots and stems, and the sludge generated by digestion is stable in property and has fertilizer efficiency and is converted into humus soil with better fertilizer property;
step four, mixing: adding quicklime into the fermented humus soil, wherein the quicklime reacts with water in the humus soil, and the chemical equation is as follows: CaO + H2O＝Ca(OH)2During the period, the pH value of the humus soil is uniformly stirred and monitored, the alkalinity of the calcium hydroxide can neutralize the low pH value of the humus soil caused by digestion reaction, and in addition, the calcium hydroxide can react with hydrogen sulfide gas in the humus soil, and the reaction chemical equation is as follows: h2S+Ca(OH)2＝CaS+2H2O, not only removing the peculiar smell in the humus soil, but also keeping the sulfur element in the humus soil and supplying the sulfur element for the following plants;
step five, dewatering and compacting: the method is characterized in that a belt type dehydrator is used for reducing the water content of the humus soil, a filter press is used for pressing the humus soil into a mud cake shape with the same size and specification, the volume is reduced, the cake forming is realized, the transportation and the storage are facilitated, if the cake is not pressed, the humus soil has higher softness, the humus soil with the same mass occupies a large space, and the transportation is inconvenient;
step six, drying and hardening: spreading the pressed mud cake, cooling, hardening, aging to obtain calcium hydroxide, and making calcium carbonate (Ca (OH)2+CO2＝CaCO3+H20) The hardness of the hardened mud cake can be increased, and the mud cake is intensively stored for later use after being hardened, so that the hardness of the mud cake is improved, the integrity of the appearance of the mud cake can be ensured, the mud cake is prevented from being broken or damaged in the storage or transportation process, and the cleaning work of a user is increased;
step seven, crushing for use: and (4) crushing the hardened mud cakes by using a crusher, and sowing the mud cakes into a planting farmland to serve as a fertilizer.
In a preferred embodiment, the fermentation time in the third step is set to be 10-15 days, wherein the adding amount of the sludge is less than 80% of the total volume of the digestion tank, and the cover plate is used for shielding the top of the digestion tank when anaerobic fermentation is carried out.
In a preferred embodiment, the cover plate is matched with the inner cavity of the digestion tank, and the cover plate is arranged to be a steel floating cover and can lift along with the liquid level in the tank so as to prevent the vacuum in the tank space.
In a preferred embodiment, the addition amount of the quicklime in the digestion tank in the fourth step is 180-3During the period, the quicklime reacts with the moisture in the humus soil, and hydrogen sulfide gas generated by sludge fermentation is absorbed and reacted.
In a preferable embodiment, when the pH value of the humus soil in the fourth step is adjusted to 6.5-7.2, the addition and the stirring of the quicklime are stopped, namely the completion of the mixing work is judged.
In a preferred embodiment, the moisture content of the humus soil after the dehydrator is operated in the fifth step is reduced to below 35%, and the dehydrated humus soil is conveyed to the filter press by using a material pump.
In a preferred embodiment, the spreading and drying in the sixth step is performed in a single-layer arrangement manner, and a ventilation fan can be added during the drying process to increase the air circulation speed.
In a preferable embodiment, the diameter of the crushed mud block in the seventh step is less than 35mm, and the crushed mud block is sowed in farmland and buried by turning soil and then subjected to irrigation treatment.
The invention has the technical effects and advantages that:
according to the invention, through the addition of the sand-stone separation and mixing steps, the sand-stone separation step can ensure the influence of impurities or crushed stones in the sludge on the appearance of the later-stage mud cake during preparation, ensure the complete appearance of the formed mud cake, avoid the defect of insufficient compactness of the mud cake caused by the doping of hard impurities and influence on the forming or transportation of the later-stage mud cake, the mixing step can remove the odor and peculiar smell in the sludge by using the reaction of the quicklime and the water and the reaction of the quicklime and the hydrogen sulfide gas, and the mud cake doped with the quicklime has better integrity after being hardened, is not easy to generate fragments and is convenient to store and transport.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention provides a sludge treatment method for biological wastewater treatment, which comprises the following specific treatment steps:
step one, mud-water separation: a user can take out part of sludge by using a mechanical excavation mode, then the residual wastewater is filtered by using a fine grid net, the residual sludge is separated from the wastewater, and the separated wastewater can be independently subjected to a sewage treatment process;
step two, fermentation: putting the sludge with impurities separated in the step two into a digestion tank, and performing digestion treatment on the sludge by using an aerobic/anaerobic fermentation treatment method of microorganisms, wherein the fermentation time is set to be 10-15 days, the putting amount of the sludge is less than 80% of the total volume of the digestion tank, the top of the digestion tank is shielded by using a cover plate when anaerobic fermentation is performed, the cover plate is matched with the inner cavity of the digestion tank, and the cover plate is a steel floating cover and can lift along with the liquid level in the tank so as to prevent the vacuum in the tank, particularly under the condition of isolating oxygen, organic matters in the sludge are firstly metabolized by saprophytic bacteria and converted into organic acid which is more easily absorbed by plant rhizomes, the sludge generated by digestion is stable in property and has fertilizer effect, and the sludge is converted into humus soil with better fertilizer property;
step three, mixing: adding quicklime into the fermented humus soil, wherein the addition amount of the quicklime in the digestion tank is 180-3During the period, the quicklime reacts with the moisture in the humus, hydrogen sulfide gas generated by sludge fermentation is absorbed and reacts, the quicklime reacts with the moisture in the humus, and the chemical equation is as follows: CaO + H2O＝Ca(OH)2During the period, the mixture is uniformly stirred and the pH value of the humus soil is monitored, the alkalinity of the calcium hydroxide can neutralize the low pH value of the humus soil caused by digestion reaction, when the pH value of the humus soil is adjusted to 6.5-7.2, the adding and stirring of the quicklime are stopped, namely the completion of the mixing work is judged, in addition, the calcium hydroxide can react with hydrogen sulfide gas in the humus soil, and the reaction is carried outThe chemical equation is: h2S+Ca(OH)2＝CaS+2H2O, not only removing the peculiar smell in the humus soil, but also keeping the sulfur element in the humus soil and supplying the sulfur element for the following plants;
step four, dewatering and compacting: firstly, reducing the moisture content of humus by using a belt type dehydrator, then pressing the humus into a mud cake shape with the same size and specification by using a filter press, reducing the volume to form a cake, wherein the moisture content of the humus after the dehydrator works is below 35%, and the dehydrated humus is conveyed to the filter press by using a material pump, so that the transportation and the storage are facilitated;
step five, drying and hardening: spreading the pressed mud cake, cooling, hardening, aging to obtain calcium hydroxide, and making calcium carbonate (Ca (OH)2+CO2＝CaCO3+H20) The hardness of the hardened mud cake can be increased, and the mud cake is intensively stored for later use after being hardened, so that the hardness of the mud cake is improved, the integrity of the appearance of the mud cake can be ensured, the mud cake is prevented from being broken or damaged in the storage or transportation process, and the cleaning work of a user is increased;
step six, crushing for use: and (3) crushing the hardened mud cakes by using a crusher, spreading the crushed mud cakes into a planting farmland to serve as fertilizer, wherein the block diameter of the crushed mud blocks is less than 35mm, and performing irrigation treatment after spreading the crushed mud blocks into the farmland and turning the soil to bury the crushed mud blocks.
Example 2:
the invention provides a sludge treatment method for biological wastewater treatment, which comprises the following specific treatment steps:
step one, mud-water separation: a user can take out part of sludge by using a mechanical excavation mode, then the residual wastewater is filtered by using a fine grid net, the residual sludge is separated from the wastewater, and the separated wastewater can be independently subjected to a sewage treatment process;
step two, sand and stone separation: putting the sludge separated in the step one on a vibrating screen machine for screening, leaving fluid sludge along screen holes of the vibrating screen machine, leaving sundries or gravel with large block diameters on the top of the vibrating screen machine, washing the separated sundries and gravel by using the wastewater in the step one, washing by using partial clear water, collecting the washing water and the sewage for centralized treatment, and recycling the washed gravel, wherein the washing method can reduce the use amount of the clear water, thereby reducing the generation amount of the sewage;
step three, fermentation: putting the sludge with impurities separated in the step two into a digestion tank, and performing digestion treatment on the sludge by using an aerobic/anaerobic fermentation treatment method of microorganisms, wherein the fermentation time is set to be 10-15 days, the putting amount of the sludge is less than 80% of the total volume of the digestion tank, the top of the digestion tank is shielded by using a cover plate when anaerobic fermentation is performed, the cover plate is matched with the inner cavity of the digestion tank, and the cover plate is a steel floating cover and can lift along with the liquid level in the tank so as to prevent the vacuum in the tank, particularly under the condition of isolating oxygen, organic matters in the sludge are firstly metabolized by saprophytic bacteria and converted into organic acid which is more easily absorbed by plant rhizomes, the sludge generated by digestion is stable in property and has fertilizer effect, and the sludge is converted into humus soil with better fertilizer property;
step four, mixing: adding quicklime into the fermented humus soil, wherein the addition amount of the quicklime in the digestion tank is 180-3During the period, the quicklime reacts with the moisture in the humus, hydrogen sulfide gas generated by sludge fermentation is absorbed and reacts, the quicklime reacts with the moisture in the humus, and the chemical equation is as follows: CaO + H2O＝Ca(OH)2During the period, the mixture is uniformly stirred and the pH value of the humus soil is monitored to be changed, the alkalinity of the calcium hydroxide can neutralize the low pH value of the humus soil caused by digestion reaction, when the pH value of the humus soil is adjusted to 6.5-7.2, the adding and stirring of the quicklime are stopped, namely the completion of the mixing work is judged, in addition, the calcium hydroxide can react with the hydrogen sulfide gas in the humus soil, and the reaction chemical equation is as follows: h2S+Ca(OH)2＝CaS+2H2O, not only removing the peculiar smell in the humus soil, but also keeping the sulfur element in the humus soil and supplying the sulfur element for the following plants;
step five, dewatering and compacting: firstly, reducing the moisture content of humus by using a belt type dehydrator, then pressing the humus into a mud cake shape with the same size and specification by using a filter press, reducing the volume to form a cake, wherein the moisture content of the humus after the dehydrator works is below 35%, and the dehydrated humus is conveyed to the filter press by using a material pump, so that the transportation and the storage are facilitated;
step six, drying and hardening: spreading the pressed mud cake, cooling, hardening, aging to obtain calcium hydroxide, and making calcium carbonate (Ca (OH)2+CO2＝CaCO3+H20) The hardness of the hardened mud cake can be increased, and the mud cake is intensively stored for later use after being hardened, so that the hardness of the mud cake is improved, the integrity of the appearance of the mud cake can be ensured, the mud cake is prevented from being broken or damaged in the storage or transportation process, and the cleaning work of a user is increased;
step seven, crushing for use: and (3) crushing the hardened mud cakes by using a crusher, spreading the crushed mud cakes into a planting farmland to serve as fertilizer, wherein the block diameter of the crushed mud blocks is less than 35mm, and performing irrigation treatment after spreading the crushed mud blocks into the farmland and turning the soil to bury the crushed mud blocks.
Example 3:
the invention provides a sludge treatment method for biological wastewater treatment, which comprises the following specific treatment steps:
step one, mud-water separation: a user can take out part of sludge by using a mechanical excavation mode, then the residual wastewater is filtered by using a fine grid net, the residual sludge is separated from the wastewater, and the separated wastewater can be independently subjected to a sewage treatment process;
step two, sand and stone separation: putting the sludge separated in the step one on a vibrating screen machine for screening, leaving fluid sludge along screen holes of the vibrating screen machine, leaving sundries or gravel with large block diameters on the top of the vibrating screen machine, washing the separated sundries and gravel by using the wastewater in the step one, washing by using partial clear water, collecting the washing water and the sewage for centralized treatment, and recycling the washed gravel, wherein the washing method can reduce the use amount of the clear water, thereby reducing the generation amount of the sewage;
step three, fermentation: putting the sludge with impurities separated in the step two into a digestion tank, and performing digestion treatment on the sludge by using an aerobic/anaerobic fermentation treatment method of microorganisms, wherein the fermentation time is set to be 10-15 days, the putting amount of the sludge is less than 80% of the total volume of the digestion tank, the top of the digestion tank is shielded by using a cover plate when anaerobic fermentation is performed, the cover plate is matched with the inner cavity of the digestion tank, and the cover plate is a steel floating cover and can lift along with the liquid level in the tank so as to prevent the vacuum in the tank, particularly under the condition of isolating oxygen, organic matters in the sludge are firstly metabolized by saprophytic bacteria and converted into organic acid which is more easily absorbed by plant rhizomes, the sludge generated by digestion is stable in property and has fertilizer effect, and the sludge is converted into humus soil with better fertilizer property;
step four, dewatering and compacting: firstly, reducing the moisture content of humus by using a belt type dehydrator, then pressing the humus into a mud cake shape with the same size and specification by using a filter press, reducing the volume to form a cake, wherein the moisture content of the humus after the dehydrator works is below 35%, and the dehydrated humus is conveyed to the filter press by using a material pump, so that the transportation and the storage are facilitated;
step five, drying and hardening: uniformly placing, spreading and airing the pressed and formed mud cakes, hardening, forming and intensively storing the mud cakes for later use after the moisture content of the mud cakes is reduced, wherein the placing, spreading and airing adopts a single-layer arrangement mode, and a ventilation fan can be added during airing so as to increase the air circulation speed;
step six, crushing for use: and (3) crushing the hardened mud cakes by using a crusher, spreading the crushed mud cakes into a planting farmland to serve as fertilizer, wherein the block diameter of the crushed mud blocks is less than 35mm, and performing irrigation treatment after spreading the crushed mud blocks into the farmland and turning the soil to bury the crushed mud blocks.
Example 4:
the following data were obtained by treating the sludge according to the treatment methods of examples 1 to 3, respectively:
as can be seen from the above table, the sludge cake treated by the method in example 2 has the advantages of smooth appearance, no falling of fragments during transportation and storage, good integrity, great reduction of foul smell in sludge, conversion of hydrogen sulfide gas generated in humus into sulfur element and retention of the sulfur element in soil, supply of sulfur element to plants and great improvement of chlorosis of plants caused by sulfur deficiency.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A sludge treatment method for biological wastewater treatment is characterized in that: the specific treatment steps are as follows:
step one, mud-water separation: a user can take out part of sludge by using a mechanical excavation mode, and then filter the residual wastewater by using a fine grid net to separate the residual sludge from the wastewater;
step two, sand and stone separation: putting the sludge separated in the step one on a vibrating screen machine for screening, wherein fluid sludge is left along screen holes of the vibrating screen machine, and impurities or gravel with large block diameters are left at the top of the vibrating screen machine;
step three, fermentation: putting the sludge with impurities separated in the step two into a digestion tank, and performing digestion treatment on the sludge by using an aerobic/anaerobic fermentation treatment method of microorganisms to convert the sludge into humus with better fertility;
step four, mixing: adding quicklime into the fermented humus soil, uniformly stirring and monitoring the change of the pH value of the humus soil;
step five, dewatering and compacting: firstly, reducing the water content of the humus by using a belt type dehydrator, and then pressing the humus into a mud cake shape with the same size and specification by using a filter press;
step six, drying and hardening: uniformly placing, spreading and airing the pressed and formed mud cakes, hardening and forming after the moisture content of the mud cakes is reduced, wherein calcium hydroxide generated after slaking the quicklime contacts air to form calcium carbonate, so that the hardness of the hardened mud cakes can be increased, and the hardened mud cakes are intensively stored for later use after being hardened;
step seven, crushing for use: and (4) crushing the hardened mud cakes by using a crusher, and sowing the mud cakes into a planting farmland to serve as a fertilizer.
2. The method of claim 1 for biologically treating sludge for wastewater, characterized in that: and setting the fermentation time in the third step to be 10-15 days, wherein the adding amount of the sludge is less than 80% of the total volume of the digestion tank, and shielding the top of the digestion tank by using a cover plate during anaerobic fermentation.
3. The method of claim 2, wherein: the cover plate is matched with the inner cavity of the digestion tank, and the cover plate is arranged to be a steel floating cover and can lift along with the height of the liquid level in the tank so as to prevent the space in the tank from being vacuumized.
4. The method of claim 1 for biologically treating sludge for wastewater, characterized in that: the addition amount of the quicklime in the step four is 180-3During the period, the quicklime reacts with the moisture in the humus soil, and hydrogen sulfide gas generated by sludge fermentation is absorbed and reacted.
5. The method of claim 1 for biologically treating sludge for wastewater, characterized in that: and in the fourth step, when the pH value of the humus soil is adjusted to 6.5-7.2, the addition and the stirring of the quicklime are stopped, and the completion of the stirring work is judged.
6. The method of claim 1 for biologically treating sludge for wastewater, characterized in that: and in the fifth step, the moisture content of the humus soil after the operation of the dehydrator is reduced to below 35%, and the dehydrated humus soil is conveyed to the filter press by using a material pump.
7. The method of claim 1 for biologically treating sludge for wastewater, characterized in that: and in the sixth step, the spreading and drying are carried out in a single-layer arrangement mode, and a ventilation fan can be added during drying so as to increase the air circulation speed.
8. The method of claim 1 for biologically treating sludge for wastewater, characterized in that: and seventhly, the diameter of the crushed mud blocks is smaller than 35mm, and the crushed mud blocks are sowed to farmlands, turned over and buried and then subjected to irrigation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910981206.XA CN110698011A (en) | 2019-10-16 | 2019-10-16 | Sludge treatment method for biological wastewater treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910981206.XA CN110698011A (en) | 2019-10-16 | 2019-10-16 | Sludge treatment method for biological wastewater treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110698011A true CN110698011A (en) | 2020-01-17 |
Family
ID=69199842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910981206.XA Pending CN110698011A (en) | 2019-10-16 | 2019-10-16 | Sludge treatment method for biological wastewater treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110698011A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333282A (en) * | 2020-02-09 | 2020-06-26 | 中日友好环境保护中心(生态环境部环境发展中心) | Rural black and odorous water body sediment treatment system and method |
| CN111499156A (en) * | 2020-05-14 | 2020-08-07 | 广东华泱技术有限公司 | Application of river channel solid waste in planting soil |
| CN113045034A (en) * | 2021-03-12 | 2021-06-29 | 桂林兴百利机械制造有限责任公司 | PLC system for sewage treatment and capable of being remotely and intelligently controlled and adjusted |
| CN114716118A (en) * | 2022-02-21 | 2022-07-08 | 江苏理文造纸有限公司 | Solid-extraction heat recovery process for sludge |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070128712A1 (en) * | 2005-09-29 | 2007-06-07 | United Utilities Plc | Treatment of putrescrible cakes |
| KR20090106969A (en) * | 2008-04-07 | 2009-10-12 | 제이오씨 다치카와 가부시키가이샤 | Method and apparatus for treatment of waste material |
| CN104761110A (en) * | 2015-04-03 | 2015-07-08 | 李文新 | Sludge treatment method for sewage plants |
| CN107759036A (en) * | 2017-10-20 | 2018-03-06 | 天津壹新环保工程有限公司 | Treatment method and device for preparing compound fertilizer from sludge |
| CN110002701A (en) * | 2019-03-21 | 2019-07-12 | 中运建设控股有限公司 | Dredged bed mud soil processing method |
-
2019
- 2019-10-16 CN CN201910981206.XA patent/CN110698011A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070128712A1 (en) * | 2005-09-29 | 2007-06-07 | United Utilities Plc | Treatment of putrescrible cakes |
| KR20090106969A (en) * | 2008-04-07 | 2009-10-12 | 제이오씨 다치카와 가부시키가이샤 | Method and apparatus for treatment of waste material |
| CN104761110A (en) * | 2015-04-03 | 2015-07-08 | 李文新 | Sludge treatment method for sewage plants |
| CN107759036A (en) * | 2017-10-20 | 2018-03-06 | 天津壹新环保工程有限公司 | Treatment method and device for preparing compound fertilizer from sludge |
| CN110002701A (en) * | 2019-03-21 | 2019-07-12 | 中运建设控股有限公司 | Dredged bed mud soil processing method |
Non-Patent Citations (1)
| Title |
|---|
| 上海市环境保护局: "《废水物化处理》", 31 October 1999, 同济大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111333282A (en) * | 2020-02-09 | 2020-06-26 | 中日友好环境保护中心(生态环境部环境发展中心) | Rural black and odorous water body sediment treatment system and method |
| CN111333282B (en) * | 2020-02-09 | 2022-04-12 | 中日友好环境保护中心(生态环境部环境发展中心) | Rural black and odorous water body sediment treatment system and method |
| CN111499156A (en) * | 2020-05-14 | 2020-08-07 | 广东华泱技术有限公司 | Application of river channel solid waste in planting soil |
| CN113045034A (en) * | 2021-03-12 | 2021-06-29 | 桂林兴百利机械制造有限责任公司 | PLC system for sewage treatment and capable of being remotely and intelligently controlled and adjusted |
| CN114716118A (en) * | 2022-02-21 | 2022-07-08 | 江苏理文造纸有限公司 | Solid-extraction heat recovery process for sludge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110698011A (en) | Sludge treatment method for biological wastewater treatment | |
| CN110451743B (en) | Method for recycling excess sludge of municipal sewage plant | |
| CN101913747B (en) | Method for producing methane by combination fermentation of paper mill sludge and food waste | |
| CN106957130B (en) | Treatment method of domestic sewage and organic solid waste | |
| CN107500497B (en) | Treatment method and system for black and odorous water body sludge | |
| CN1283595C (en) | High-temperature aerobic fermentation of organic refuse material | |
| CN102745866A (en) | Non-hazardous recycling treatment method for excrement | |
| CN209740874U (en) | Biogas slurry treatment device | |
| Vanotti et al. | Removing and recovering nitrogen and phosphorus from animal manure | |
| CN105384474A (en) | Preparation technology of deodorized, sterilized, and low-pollution sludge organic composite fertilizer | |
| CN114988965A (en) | Sludge and derivative with water content of eighty percent treated at high speed and preparation method thereof | |
| CN100457693C (en) | Environmental organic nutrient soil as well as preparation technique and application thereof | |
| CN106467352A (en) | A kind of for the foul smell resource reutilization of sludge organism drying technique with the method for deodorization | |
| KR100741696B1 (en) | The organic matter fertilizer production technique for which food trash was used | |
| CN113754215A (en) | Sludge treatment and resource utilization method and device based on dehydration method | |
| CN101307234A (en) | Organic modifying agent for low-yield soil and method for preparing same | |
| CN115784561A (en) | Method for preparing nutrient soil from domestic sludge in one minute | |
| CN105180171A (en) | Garbage treatment method and garbage treatment equipment | |
| KR20160072363A (en) | Method of Treatment for Food Waste Water and Food Waste | |
| CN113860954A (en) | Blue algae sludge treatment method | |
| CN209759268U (en) | Sludge treatment system | |
| CN106927656A (en) | A kind of method of Fenton sludge filler | |
| Badawi et al. | Anaerobic treatment with methane recovery of agricultural and village wastes | |
| CN112010684A (en) | Organic garbage treatment process based on full-ecological coupling method | |
| KR101327185B1 (en) | A composite making method using both organic waste and sludge and the composite made by thereof |
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 |
Application publication date: 20200117 |
|
| RJ01 | Rejection of invention patent application after publication |