CN113072248A - Pig raising wastewater sludge fermentation process - Google Patents
Pig raising wastewater sludge fermentation process Download PDFInfo
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- CN113072248A CN113072248A CN202110324685.5A CN202110324685A CN113072248A CN 113072248 A CN113072248 A CN 113072248A CN 202110324685 A CN202110324685 A CN 202110324685A CN 113072248 A CN113072248 A CN 113072248A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 80
- 238000000855 fermentation Methods 0.000 title claims abstract description 57
- 230000004151 fermentation Effects 0.000 title claims abstract description 54
- 239000010802 sludge Substances 0.000 title claims abstract description 49
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 238000005189 flocculation Methods 0.000 claims description 20
- 230000016615 flocculation Effects 0.000 claims description 20
- 238000004659 sterilization and disinfection Methods 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 239000008394 flocculating agent Substances 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000645 desinfectant Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000005188 flotation Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 3
- 238000005868 electrolysis reaction Methods 0.000 claims description 2
- 241000282898 Sus scrofa Species 0.000 claims 7
- 241000282887 Suidae Species 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 28
- 241000894006 Bacteria Species 0.000 abstract description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 5
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 230000027756 respiratory electron transport chain Effects 0.000 abstract description 2
- 241000626621 Geobacillus Species 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 230000029087 digestion Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
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- 241000193830 Bacillus <bacterium> Species 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 239000005416 organic matter Substances 0.000 description 1
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- 230000020477 pH reduction Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/465—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a pig raising wastewater sludge fermentation process which sequentially comprises a settling tank and a fermentation tank from left to right, wherein a feeding pipe is arranged on one side wall of the upper end of the settling tank, the lower end of the settling tank is communicated with the lower end of the fermentation tank through a material guide pipe, a wastewater collection device is arranged in the settling tank, and the wastewater collection device can discharge and collect upper wastewater in the settling tank; a side wall of the upper end in the fermentation tank is provided with a material passing pipe, the material passing pipe can be communicated with anaerobic sludge particles, a stirring device is arranged on the fermentation tank, a carbon rod layer is arranged on the stirring device, and the carbon rod layer is electrically connected with an external power supply through a wire. The carbon rod layer is used as a conductor material and intervenes in electron transfer between anaerobic oxidizing bacteria and methane bacteria, so that electrons generated by the organic matters decomposed by the geobacillus are directly utilized by the methane-producing bacteria, carbon dioxide is reduced into methane, the methane yield and the sludge decomposition speed are improved, the sludge treatment efficiency is improved, and the investment is saved.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a fermentation process of pig raising wastewater sludge.
Background
The pig farm waste water sludge mainly comprises urine, residual excrement, feed residues, flushing water and the like, some fields also comprise domestic waste water generated in the production process, the flushing water is the main part, the flushing water accounts for most of the waste water sludge, and as the waste water sludge in the pig farm has high organic matter concentration and contains a large amount of nitrogen, phosphorus, suspended matters, pathogenic bacteria and other components, if the pollutants are not properly treated, the serious environmental pollution can be caused once the pollutants enter natural water bodies and farmlands;
anaerobic methane production in the prior art is an effective way for organic waste treatment, and organic solid waste is not only reduced in anaerobic digestion, but also can generate energy, namely methane gas. At present, anaerobic digestion technology is widely used for pig farm wastewater sludge treatment. However, when wastewater and sludge in a pig farm are treated by anaerobic treatment, the problems of complicated sludge structure and slow hydrolysis acidification speed exist, and the energy consumption is large and the chemical pollution is serious.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention provides a fermentation process of pig raising wastewater sludge,
the device comprises a settling tank and a fermentation tank from left to right in sequence, wherein a feeding pipe is arranged on one side wall of the upper end of the settling tank, the feeding pipe can feed wastewater sludge into the settling tank, the settling tank can perform settling and layering on the wastewater sludge, the upper layer in the settling tank is wastewater, the lower layer is sludge, the lower end of the settling tank is communicated with the lower end of the fermentation tank through a material guide pipe, the material guide pipe can feed the lower layer sludge in the settling tank into the fermentation tank, a wastewater collection device is arranged in the settling tank, and the wastewater collection device can discharge and collect the upper layer wastewater in the settling tank;
a lateral wall of upper end in the fermentation cylinder is provided with leads to the material pipe, it can let in anaerobism mud granule to lead to the material pipe, anaerobism mud granule can be right mud in the fermentation cylinder carries out anaerobic fermentation, be provided with agitating unit on the fermentation cylinder, agitating unit includes agitator motor, (mixing) shaft, stirring vane, agitator motor sets up the upper end of fermentation cylinder, the lower extreme of (mixing) shaft runs through the lateral wall of fermentation cylinder, and extend to the inside of fermentation cylinder, the upper end of (mixing) shaft with agitator motor's output shaft, the even interval of stirring vane sets up on the (mixing) shaft, the last carbon rod layer that is provided with of stirring vane, the carbon rod layer passes through the wire and is connected with external power electricity.
Preferably, the wastewater collection device comprises a telescopic pipe, a motor and a drain pipe, wherein the upper end of the telescopic pipe penetrates through the lower end side wall of the settling tank and extends into the settling tank, the lower end of the telescopic pipe is connected with the motor, the motor can drive the telescopic pipe to move up and down in a telescopic manner, the side wall of the telescopic pipe, which is positioned outside the settling tank, is communicated with the drain pipe, and the drain pipe is communicated with a wastewater treatment device.
Preferably, the wastewater treatment device comprises an electrolytic cell, a PH adjusting tank, an A/O treatment tank, a flocculation tank and a disinfection tank from left to right in sequence, wherein the electrolytic cell, the PH adjusting tank, the A/O treatment tank, the flocculation tank and the disinfection tank are communicated in sequence.
Preferably, the lateral wall of gunbarrel is provided with the sampling tube, the sampling tube sets up to two sets of at least, even interval sets up about the sampling tube, the sampling tube is convenient for operating personnel real-time detection the composition of upper waste water in the gunbarrel.
A pig raising wastewater treatment process comprises the following steps:
s1: the wastewater is introduced into an electrolytic cell through a drain pipe, a plate electrode is arranged in the electrolytic cell and is electrically connected with an external power supply through a lead, a large amount of micro bubbles of hydrogen and oxygen are generated by electrolysis of the plate electrode, and the bubbles float together after absorbing suspended matters in the wastewater, so that the air flotation separation effect is realized;
s2: filtering the electrolyzed wastewater in the electrolytic cell, conveying the filtered electrolyzed wastewater into a pH adjusting cell, and adding alkali liquor into the pH adjusting cell to ensure that the pH value of the wastewater in the pH adjusting cell is 6-8;
s3: conveying the wastewater in the PH adjusting tank to an A/O (anoxic/oxic) treatment tank, and carrying out biochemical treatment on the internal wastewater by the A/O treatment tank;
s4: conveying the wastewater subjected to biochemical treatment in the A/O treatment tank to a flocculation tank, and adding a flocculating agent into the flocculation tank for flocculation and precipitation treatment;
s5: and the wastewater flocculated in the flocculation tank is filtered and conveyed into a disinfection tank, and the disinfection tank disinfects the wastewater, so that the wastewater after disinfection meets the discharge standard.
Preferably, the electrode plate is a graphite, iron or aluminum material.
Preferably, the alkali solution added in the step S2 is NaOH solution.
Preferably, the flocculating agent in the step S4 is a mixture of polyaluminum chloride and polyacrylamide, and the disinfectant in the step S5 is sodium hypochlorite.
The invention has the beneficial effects
The pig raising wastewater sludge is introduced into a settling tank through a feeding pipe, standing and layering are carried out, the sludge at the lower layer is conveyed into a fermentation tank through a material guide pipe, the wastewater at the upper layer is discharged and collected through a wastewater collection device, the sludge is introduced into the fermentation tank, anaerobic sludge particles are introduced into the fermentation tank through the material guide pipe and ferment the sludge, during the fermentation process, a switch of a stirring motor is turned on, the stirring motor drives a stirring shaft to rotate so as to drive stirring blades to synchronously rotate, the stirring blades drive the sludge in the fermentation tank and the anaerobic sludge particles to stir, so that the fermentation rate is increased, and the carbon rod layer is arranged on the stirring blades and is used as a conductor material to intervene in the electron transfer between anaerobic oxidizing bacteria and methane bacteria, so that electrons generated by decomposing organic matters by bacillus are directly utilized by methane-producing bacteria, carbon dioxide is reduced into methane, and the methane yield and the sludge decomposition, the sludge treatment efficiency is improved, and the investment is saved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a flow chart of the wastewater treatment process of the present invention.
Description of reference numerals: 1-a settling tank, 2-a fermentation tank, 3-a feeding pipe, 4-a guide pipe, 5-a material passing pipe, 6-a stirring motor, 7-a stirring shaft, 8-a stirring blade, 9-a carbon rod layer, 10-a telescopic pipe, 11-a motor, 12-a water discharging pipe, 13-a wastewater treatment device, 14-an electrolytic tank, 15-a pH adjusting tank, 16-an/O treatment tank, 17-a flocculation tank, 18-a disinfection tank and 19-a sampling pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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.
Examples
As shown in figures 1-2, the invention provides a pig-raising wastewater sludge fermentation process,
the device comprises a settling tank 1 and a fermentation tank 2 from left to right in sequence, wherein a feeding pipe 3 is arranged on one side wall of the upper end of the settling tank 1, the feeding pipe 3 can feed wastewater sludge into the settling tank 1, the settling tank 1 can settle and stratify the wastewater sludge, the upper layer in the settling tank 1 is wastewater, the lower layer is sludge, the lower end of the settling tank 1 is communicated with the lower end of the fermentation tank 2 through a material guide pipe 4, the material guide pipe 4 can feed the lower layer sludge in the settling tank 1 into the fermentation tank 2, a wastewater collection device is arranged in the settling tank 1, and the wastewater collection device can discharge and collect the upper layer wastewater in the settling tank 1;
a lateral wall of upper end is provided with leads to material pipe 5 in the fermentation cylinder 2, it can let in anaerobism mud granule to lead to material pipe 5, anaerobism mud granule can be right mud in the fermentation cylinder 2 carries out anaerobic fermentation, be provided with agitating unit on the fermentation cylinder 2, agitating unit includes agitator motor 6, (mixing) shaft 7, stirring vane 8, agitator motor 6 sets up the upper end of fermentation cylinder 2, the lower extreme of (mixing) shaft 7 runs through the lateral wall of fermentation cylinder 2, and extends to the inside of fermentation cylinder 2, the upper end of (mixing) shaft 7 with agitator motor 6's output shaft, stirring vane 8 even interval sets up on the (mixing) shaft 7, be provided with carbon rod layer 9 on the stirring vane 8, carbon rod layer 9 is connected with external power supply electricity through the wire, waste water collection device includes flexible pipe 10, motor 11, flexible pipe, A drain pipe 12, the lower extreme lateral wall of gunbarrel 1 is run through to the upper end of flexible pipe 10, and extends to in gunbarrel 1, the lower extreme of flexible pipe 10 is connected with motor 11, motor 11 can drive flexible motion about flexible pipe 10, is located outside gunbarrel 1 flexible pipe 10 lateral wall intercommunication has drain pipe 12, drain pipe 12 intercommunication has effluent treatment plant 13, effluent treatment plant 13 turns right from a left side and includes electrolytic bath 14, PH equalizing basin 15, AO processing pool 16, flocculation basin 17, disinfection pond 18 in proper order, electrolytic bath 14, PH equalizing basin 15, AO processing pool 16, flocculation basin 17, disinfection pond 18 communicate in proper order, gunbarrel 1's lateral wall is provided with sampling tube 19, sampling tube 19 sets up to two sets of at least, sampling tube 19 is even interval setting from top to bottom, sampling tube 19 is convenient for operating personnel real-time detection the composition of upper waste water in gunbarrel 1,
pig raising wastewater sludge is introduced into a settling tank 1 through an inlet pipe 3, standing and layering are carried out, sludge at the lower layer is conveyed into a fermentation tank 2 through a material guide pipe 4, wastewater at the upper layer is discharged and collected through a wastewater collection device, sludge is introduced into the fermentation tank 2, anaerobic sludge particles are introduced into the fermentation tank 2 through a material guide pipe 5 and ferment the sludge, in the fermentation process, a switch of a stirring motor 6 is turned on, the stirring motor 6 drives a stirring shaft 7 to rotate so as to drive stirring blades 8 to synchronously rotate, the stirring blades 8 drive the sludge in the fermentation tank 2 to be stirred with the anaerobic sludge particles so as to increase the fermentation rate, a carbon rod layer 9 is arranged on the stirring blades 8, the carbon rod layer 9 is used as a conductor material to intervene electronic transmission between anaerobic oxidizing bacteria and methane bacteria, so that electrons generated by decomposing organic matters by the bacteria are directly utilized by methane-producing bacteria to reduce carbon dioxide into methane, the methane yield and the sludge decomposition speed are improved, the sludge treatment efficiency is improved, and the investment is saved;
a pig raising wastewater treatment process comprises the following steps:
s1: the wastewater is introduced into an electrolytic cell 14 through a drain pipe 12, an electrode plate is arranged in the electrolytic cell 14 and is electrically connected with an external power supply through a lead, the electrode plate is electrolyzed to generate a large amount of micro bubbles of hydrogen and oxygen, the bubbles float up together after absorbing suspended matters in the wastewater, and the effect of air flotation separation is achieved, and the electrode plate is made of graphite, iron or aluminum materials;
s2: filtering the electrolyzed wastewater in the electrolytic cell 14, conveying the filtered electrolyzed wastewater into a pH adjusting cell 15, adding an alkali liquor into the pH adjusting cell 15, wherein the alkali liquor is a NaOH solution, and enabling the pH value of the wastewater in the pH adjusting cell 15 to be 6-8;
s3: conveying the wastewater in the PH adjusting tank 15 into an A/O treatment tank 16, and carrying out biochemical treatment on the internal wastewater by the A/O treatment tank 16; the A/O treatment tank 16 is called an anaerobic-aerobic method, and the biological nitrogen and phosphorus removal process is short, wherein the A/O process is the most simple and widely applied nitrogen and phosphorus removal process;
s4: the wastewater after biochemical treatment in the A/O treatment tank 16 is conveyed into a flocculation tank 17, and a flocculating agent is added into the flocculation tank 17 for flocculation and precipitation treatment, wherein the flocculating agent is a mixture of polyaluminium chloride and polyacrylamide;
s5: waste water after flocculation in flocculation basin 17 is carried to disinfection pond 18 in through filtering, and disinfection pond 18 disinfects it, and the waste water after the disinfection reaches emission standard, and the disinfectant is sodium hypochlorite.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (8)
1. A fermentation process of waste water sludge for raising pigs, which is characterized in that,
the device comprises a settling tank and a fermentation tank from left to right in sequence, wherein a feeding pipe is arranged on one side wall of the upper end of the settling tank, the feeding pipe can feed wastewater sludge into the settling tank, the settling tank can perform settling and layering on the wastewater sludge, the upper layer in the settling tank is wastewater, the lower layer is sludge, the lower end of the settling tank is communicated with the lower end of the fermentation tank through a material guide pipe, the material guide pipe can feed the lower layer sludge in the settling tank into the fermentation tank, a wastewater collection device is arranged in the settling tank, and the wastewater collection device can discharge and collect the upper layer wastewater in the settling tank;
a lateral wall of upper end in the fermentation cylinder is provided with leads to the material pipe, it can let in anaerobism mud granule to lead to the material pipe, anaerobism mud granule can be right mud in the fermentation cylinder carries out anaerobic fermentation, be provided with agitating unit on the fermentation cylinder, agitating unit includes agitator motor, (mixing) shaft, stirring vane, agitator motor sets up the upper end of fermentation cylinder, the lower extreme of (mixing) shaft runs through the lateral wall of fermentation cylinder, and extend to the inside of fermentation cylinder, the upper end of (mixing) shaft with agitator motor's output shaft, the even interval of stirring vane sets up on the (mixing) shaft, the last carbon rod layer that is provided with of stirring vane, the carbon rod layer passes through the wire and is connected with external power electricity.
2. The fermentation process of wastewater and sludge for pig raising according to claim 1,
the waste water collecting device comprises a telescopic pipe, a motor and a drain pipe, wherein the upper end of the telescopic pipe penetrates through the lower end side wall of the settling tank and extends into the settling tank, the lower end of the telescopic pipe is connected with the motor, the motor can drive the telescopic pipe to move up and down in a telescopic mode, the telescopic pipe side wall located outside the settling tank is communicated with the drain pipe, and the drain pipe is communicated with a waste water treatment device.
3. The fermentation process of wastewater and sludge for pig raising according to claim 2,
the wastewater treatment device comprises an electrolytic cell, a PH adjusting tank, an A/O treatment tank, a flocculation tank and a disinfection tank from left to right in sequence, wherein the electrolytic cell, the PH adjusting tank, the A/O treatment tank, the flocculation tank and the disinfection tank are communicated in sequence.
4. The fermentation process of wastewater and sludge for pig raising according to claim 1,
the lateral wall of gunbarrel is provided with the sampling tube, the sampling tube sets up to two sets of at least, even interval sets up about the sampling tube, the sampling tube is convenient for operating personnel real-time detection the composition of upper waste water in the gunbarrel.
5. A pig raising wastewater treatment process is characterized by comprising the following steps:
s1: the wastewater is introduced into an electrolytic cell through a drain pipe, a plate electrode is arranged in the electrolytic cell and is electrically connected with an external power supply through a lead, a large amount of micro bubbles of hydrogen and oxygen are generated by electrolysis of the plate electrode, and the bubbles float together after absorbing suspended matters in the wastewater, so that the air flotation separation effect is realized;
s2: filtering the electrolyzed wastewater in the electrolytic cell, conveying the filtered electrolyzed wastewater into a pH adjusting cell, and adding alkali liquor into the pH adjusting cell to ensure that the pH value of the wastewater in the pH adjusting cell is 6-8;
s3: conveying the wastewater in the PH adjusting tank to an A/O (anoxic/oxic) treatment tank, and carrying out biochemical treatment on the internal wastewater by the A/O treatment tank;
s4: conveying the wastewater subjected to biochemical treatment in the A/O treatment tank to a flocculation tank, and adding a flocculating agent into the flocculation tank for flocculation and precipitation treatment;
s5: and the wastewater flocculated in the flocculation tank is filtered and conveyed into a disinfection tank, and the disinfection tank disinfects the wastewater, so that the wastewater after disinfection meets the discharge standard.
6. The swine wastewater treatment process according to claim 5,
the electrode plate is made of graphite, iron or aluminum material.
7. The swine wastewater treatment process according to claim 5,
and the alkali liquor added in the step S2 is NaOH solution.
8. The swine wastewater treatment process according to claim 5,
the flocculating agent in the S4 step is a mixture of polyaluminum chloride and polyacrylamide, and the disinfectant in the S5 step is sodium hypochlorite.
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