A carbon source preparation device for a kitchen wastewater system

Abstract

The application discloses a kind of carbon source preparation devices of kitchen wastewater system, apply in carbon source preparation field, including directional fermentation carbon source tank, sediment tank and in situ desulfurization anaerobic tank, the surface of directional fermentation carbon source tank is connected with organic slurry water inlet pipe, biogas slurry backflow pipe and liquid alkali pipe, the surface of directional fermentation carbon source tank is connected with first air blower;The application is in micro-oxygen environment by aeration control hydrolysis acidification, inhibits the activity of methanogen, domesticates hydrolysis bacteria, simultaneously cultivate aerobic bacteria to form bacteria agglutination, realize that slurry has good sedimentation performance, SV30 reaches 40%~60%.Carbon source slurry with good sedimentation performance is separated by integrated slag scraping sedimentation machine, the separated effluent SS is controlled between 1000~3000mg / L, and the SS of effluent is better than the effect of two centrifuges.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of carbon source preparation, in particular to a kitchen wastewater system carbon source preparation device. BACKGROUND

[0002] With the sustained and rapid development of China's economy, the living standards of the people are improving, and the output of kitchen waste is also increasing. This makes the biogas project develop rapidly, and the amount of biogas slurry also increases. Especially in some large and medium-sized organic matter biogas projects, the biogas slurry produced every day can reach several hundred to several thousand tons. If these biogas slurry cannot be reasonably disposed of, not only resources will be wasted, but also the environment will be caused secondary pollution. Nitrogen discharged into the water body in nature not only causes eutrophication of the water body and deterioration of water resources, but also may affect human health. Nitric acid nitrogen salt can be converted into nitrosamine and other substances, becoming a potential carcinogen. In view of this, with the continuous development of China's urbanization construction, the sewage discharge standard is continuously improved, and the standards for total nitrogen and ammonia nitrogen discharge will be more stringent. This also puts forward higher requirements for many sewage treatment plants.

[0003] The existing kitchen waste slurry is used to prepare anaerobic hydrolysis acidification carbon source. The slurry of the hydrolyzed carbon source is viscous and has a high oil content of 5000-10000 mg / L. Stable solid-liquid separation cannot be achieved by using a solid-liquid centrifuge, and the equipment selection is large, the operation and investment costs are high. The optimal reaction pH of the kitchen waste slurry used for hydrolysis and fermentation slurry is between 5.5 and 7.0, and the pH of the kitchen waste slurry is between 3 and 4. In order to realize stable operation of hydrolysis and fermentation, a large amount of liquid alkali or flake alkali needs to be added. 1‰-1% of caustic soda needs to be added per ton of slurry. The operation cost is high, the effect is unstable, and the slurry of the kitchen waste slurry hydrolysis and fermentation carbon source is large in odor, high in organic content, and has a water content of more than 85%. The solid-liquid often needs secondary treatment. The organic matter in the fermented slurry is wasted, and the resource utilization and reduction goals are not achieved. A large amount of hydrogen gas, carbon dioxide and hydrogen sulfide odor gas are generated during the hydrolysis and fermentation of the kitchen waste slurry. The investment in conventional deodorization equipment is large, and the operation cost is high. The generated hydrogen gas needs to be disposed of properly, which increases the investment in secondary equipment and has potential safety risks. The generated carbon dioxide is discharged into the air, increasing greenhouse gases, and there are many problems. In order to solve the above problems, we propose a kitchen wastewater system carbon source preparation device. SUMMARY

[0004] The present application provides a kitchen wastewater system carbon source preparation device, which has the advantages of low operation cost, stable operation, environmental protection and high biogas yield.

[0005] The technical problem that the present application solves is achieved by the technical scheme that a kitchen wastewater system carbon source preparation device includes a directional fermentation carbon source tank, a sediment tank and an in-situ desulfurization anaerobic tank, the surface of the directional fermentation carbon source tank is connected with an organic slurry inlet pipe, a biogas slurry return pipe and a liquid alkali pipe, the surface of the directional fermentation carbon source tank is connected with a first air blower, the inner wall of the directional fermentation carbon source tank is bolted with a first aeration pipe, the surface of the directional fermentation carbon source tank is connected with a first pH meter, a first ORP meter and a DO instrument, the top of the directional fermentation carbon source tank is provided with a mist eliminator, the surface of the directional fermentation carbon source tank is connected with a first carbon source discharge pipe, the other end of the first carbon source discharge pipe is connected with a first feed pipe, and the first feed pipe is connected with the top of the sediment tank, the inside of the sediment tank is provided with a dross scraper, the surface of the sediment tank is connected with a second carbon source discharge pipe, the surface of the sediment tank is connected with a second deodorization pipe, the bottom of the directional fermentation carbon source tank is connected with a first sludge discharge pump, the output end of the first sludge discharge pump is connected with a second sludge discharge pump, and the output end of the second sludge discharge pump is connected with the bottom of the sediment tank, the output end of the mist eliminator is connected with a first deodorization pipe, and the second deodorization pipe is connected with the first deodorization pipe, the other end of the first deodorization pipe is connected with an aeration Roots blower, the output end of the aeration Roots blower is connected with a second aeration pipe, and the second aeration pipe is fixedly sleeved with the inner wall of the in-situ desulfurization anaerobic tank, the top of the in-situ desulfurization anaerobic tank is provided with a gas cabinet, the surface of the gas cabinet and the surface of the in-situ desulfurization anaerobic tank are connected with a biogas pipe, the surface of the gas cabinet is connected with an outer membrane air blower, the surface of the in-situ desulfurization anaerobic tank is connected with a discharge circulating pump, and the output end of the discharge circulating pump is connected with the surface of the in-situ desulfurization anaerobic tank, the output end of the discharge circulating pump is connected with a second pH meter and a second ORP instrument, the surface of the gas cabinet is connected with a biogas Roots blower, the output end of the biogas Roots blower is connected with a biogas power generation device, the second feed pipe is connected between the first sludge discharge pump and the second sludge discharge pump, and the other end of the second feed pipe is connected with the surface of the in-situ desulfurization anaerobic tank.

[0006] The application has the advantages that: by controlling the hydrolysis acidification in a micro-oxygen environment through aeration, the activity of methanogenic bacteria is inhibited, and hydrolysis bacteria is domesticated, and aerobic bacteria is cultivated to form a zooglea, so that the slurry has good settling performance, and SV30 reaches 40%-60%. The carbon source slurry with good settling performance is separated by the integrated scraper-type thickener, the separated clear liquid has SS controlled between 1000-3000 mg / L, and the SS of the clear liquid is better than that of the two centrifuges. Therefore, the investment of the expensive solid-liquid centrifuge is replaced, the operation cost of reagents, water and electricity is greatly reduced, the high alkalinity is supplemented by the external anaerobic digestion biogas liquid, the pH in the hydrolysis environment is improved, the biogas liquid is reused, the addition ratio of the biogas liquid to the kitchen waste fermentation slurry is controlled between 1:1-2:1, the pH in the hydrolysis fermentation is stably controlled between 5.5-6.5, the reagent cost of supplementing alkalinity is reduced, the investment of the biogas liquid treatment sewage equipment is reduced, and the cost of separately treating the biogas liquid is avoided. After the kitchen waste slurry is hydrolyzed and fermented to produce carbon source, the liquid phase reaches the high-standard carbon source product, the upper floating sludge is separated by the scraper and pumped to the in-situ desulfurization tank, and the bottom precipitated material is also pumped to the in-situ desulfurization tank, and anaerobic fermentation is carried out in the in-situ desulfurization tank to produce biogas. The in-situ desulfurization tank is subjected to anaerobic digestion for 30-45 days to fully decompose carbon source compounds, proteins and oils, and the decomposed biogas liquid contains a large amount of humic acid and cellulose. After the biogas liquid is separated by the two-phase centrifuge, the solid-phase biogas residue is fermented and composted to be used as an organic fertilizer for garden planting, and the liquid phase is used for supplementing alkalinity in the directional fermentation carbon source tank. The solid-phase resource recycling is realized in the hydrolysis and fermentation carbon source separation, the use of the sewage equipment is avoided, the facility investment is reduced, the operation cost is reduced, the maximum utilization of resources is achieved, the hydrogen and carbon dioxide generated in the hydrolysis and fermentation process are collected and transported to the in-situ desulfurization tank for anaerobic fermentation, the methanogenic bacteria is used to convert the hydrogen and carbon dioxide into biogas. Under the condition of the micro-oxygen environment, the ORP is controlled between-350 mv and-450 mv, H2S can be oxidized into elemental sulfur, the removal rate of hydrogen sulfide in the biogas reaches more than 95%, and the concentration of hydrogen sulfide is reduced to within 200 ppm. The investment of the application treats the foul gas and hydrogen sulfide, reduces the investment of the desulfurization device and the deodorization device, and improves the biogas yield. The resource recycling and reduction are fully realized.

[0007] The application further provides that: the directional fermentation carbon source tank is internally provided with a central agitator.

[0008] The application has the advantages that: by setting the central agitator, the tank is in a complete mixing state.

[0009] The application further provides that: the in-situ desulfurization anaerobic tank is internally provided with a side agitator.

[0010] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0011] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0012] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0013] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0014] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0015] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0016] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0017] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0018] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0019] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0020] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0021] The technical scheme is adopted, the side stirrer is arranged, and the aeration efficiency is improved.

[0022] 1. The present application controls the hydrolysis acidification in a micro-oxygen environment by aeration, inhibits the activity of methanogenic bacteria, domesticates hydrolysis bacteria, and simultaneously cultivates aerobic bacteria to form a zooglea, so that the slurry has good settling performance, and the SV30 reaches 40% to 60%. The carbon source slurry with good settling performance is subjected to solid-liquid separation through an integrated slag scraping precipitator, the separated clear liquid has an SS of 1000 to 3000 mg / L, and the SS of the clear liquid is better than that of two centrifuges.

[0023] 2. The present application supplements high alkalinity by adding anaerobic digestion biogas, improves the pH in the hydrolysis environment, simultaneously realizes biogas reuse, and controls the biogas and kitchen waste fermentation slurry addition ratio to be between 1:1 and 2:1, so that the pH in the hydrolysis and fermentation process can be stably controlled to be between 5.5 and 6.5, the reagent cost for supplementing alkalinity is reduced, the investment in biogas treatment sewage equipment is reduced, and the cost for separately treating biogas is avoided.

[0024] 3. The present application is through the kitchen garbage slurry by hydrolysis fermentation carbon source through the integration of the scraper sedimentation machine, the liquid phase reaches the standard high standard carbon source product, the upper floating dregs is separated by the scraper and pumped to the in-situ desulfurization tank, the bottom precipitated material is also pumped to the in-situ desulfurization tank, and the in-situ desulfurization tank is subjected to anaerobic fermentation to produce biogas. The in-situ desulfurization tank is subjected to anaerobic digestion for 30-45 days to fully decompose carbon source compounds, proteins and oils. The decomposed biogas slurry contains a large amount of humic acid and cellulose. After separation by a two-phase centrifuge, the solid-phase biogas residue is subjected to fermentation composting and can be used as an organic fertilizer for garden planting. The liquid phase is recycled to the directional fermentation carbon source tank to supplement alkalinity. The hydrolysis and fermentation carbon source separation realizes resource recycling and utilization, avoids the use of sewage equipment, reduces facility investment, reduces operating costs, and maximizes resource utilization.

[0025] 4. The present application is through the kitchen garbage slurry by hydrolysis fermentation carbon source through the integration of the scraper sedimentation machine, the liquid phase reaches the standard high standard carbon source product, the upper floating dregs is separated by the scraper and pumped to the in-situ desulfurization tank, the bottom precipitated material is also pumped to the in-situ desulfurization tank, and the in-situ desulfurization tank is subjected to anaerobic fermentation to produce biogas. The in-situ desulfurization tank is subjected to anaerobic digestion for 30-45 days to fully decompose carbon source compounds, proteins and oils. The decomposed biogas slurry contains a large amount of humic acid and cellulose. After separation by a two-phase centrifuge, the solid-phase biogas residue is subjected to fermentation composting and can be used as an organic fertilizer for garden planting. The liquid phase is recycled to the directional fermentation carbon source tank to supplement alkalinity. The hydrolysis and fermentation carbon source separation realizes resource recycling and utilization, avoids the use of sewage equipment, reduces facility investment, reduces operating costs, and maximizes resource utilization. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the carbon source preparation system diagram of the present application;

[0027] Figure 2 is the carbon source preparation process flow diagram of the present application.

[0028] Figure legend: 1, directional fermentation carbon source tank; 2, sedimentation tank; 3, in-situ desulfurization anaerobic tank; 4, organic slurry inlet pipe; 5, biogas slurry return pipe; 6, liquid alkali pipe; 7, first air blower; 8, first aeration pipe; 9, first pH meter; 10, first ORP meter; 11, DO meter; 12, demister; 13, first carbon source discharge pipe; 14, first feed pipe; 15, floating dregs scraper; 16, second carbon source discharge pipe; 17, second deodorization pipe; 18, first sludge discharge pump; 19, second sludge discharge pump; 20, first deodorization pipe; 21, aeration Roots blower; 22, second aeration pipe; 23, gas cabinet; 24, biogas pipe; 25, outer membrane air blower; 26, discharge circulating pump; 27, second pH meter; 28, second ORP meter; 29, biogas Roots blower; 30, biogas power generation device; 31, second feed pipe; 32, central stirrer; 33, side stirrer; 34, inclined plate; 35, overflow weir; 36, baffle; 37, water seal. DETAILED DESCRIPTION

[0029] The application is further described in detail by the following drawings.

[0030] Example 1:

[0031] Reference Figure 1 and Figure 2The application discloses a carbon source preparation device for a kitchen wastewater system, which comprises a directional fermentation carbon source tank 1, a sedimentation tank 2 and an in-situ desulfurization anaerobic tank 3. The surface of the directional fermentation carbon source tank 1 is connected with an organic slurry inlet pipe 4, a biogas slurry return pipe 5 and a liquid alkali pipe 6. The surface of the directional fermentation carbon source tank 1 is connected with a first air blower 7. The inner wall of the directional fermentation carbon source tank 1 is connected with a first aeration pipe 8. The surface of the directional fermentation carbon source tank 1 is connected with a first pH meter 9, a first ORP meter 10 and a DO instrument 11. The top of the directional fermentation carbon source tank 1 is provided with a mist eliminator 12. The surface of the directional fermentation carbon source tank 1 is connected with a first carbon source discharge pipe 13. The other end of the first carbon source discharge pipe 13 is connected with a first feeding pipe 14, and the first feeding pipe 14 is connected with the top of the sedimentation tank 2. The inside of the sedimentation tank 2 is provided with a scum scraping machine 15. The surface of the sedimentation tank 2 is connected with a second carbon source discharge pipe 16. The surface of the sedimentation tank 2 is connected with a second deodorization pipe 17. The bottom of the directional fermentation carbon source tank 1 is connected with a first sludge discharge pump 18. The output end of the first sludge discharge pump 18 is connected with a second sludge discharge pump 19, and the output end of the second sludge discharge pump 19 is connected with the bottom of the sedimentation tank 2. The output end of the mist eliminator 12 is connected with a first deodorization pipe 20, and the second deodorization pipe 17 is connected with the first deodorization pipe 20. The other end of the first deodorization pipe 20 is connected with an aeration Roots blower 21. The output end of the aeration Roots blower 21 is connected with a second aeration pipe 22, and the second aeration pipe 22 is fixedly sleeved with the inner wall of the in-situ desulfurization anaerobic tank 3. The top of the in-situ desulfurization anaerobic tank 3 is provided with a gas cabinet 23. The gas cabinet 23 and the surface of the in-situ desulfurization anaerobic tank 3 are connected with a biogas pipe 24. The surface of the gas cabinet 23 is connected with an outer membrane air blower 25. The surface of the in-situ desulfurization anaerobic tank 3 is connected with a discharge circulating pump 26, and the output end of the discharge circulating pump 26 is connected with the surface of the in-situ desulfurization anaerobic tank 3. The output end of the discharge circulating pump 26 is connected with a second pH meter 27 and a second ORP instrument 28. The surface of the gas cabinet 23 is connected with a biogas Roots blower 29. The output end of the biogas Roots blower 29 is connected with a biogas power generation device 30. The second feeding pipe 31 is connected between the first sludge discharge pump 18 and the second sludge discharge pump 19, and the other end of the second feeding pipe 31 is connected with the surface of the in-situ desulfurization anaerobic tank 3. The water hydrolysis acidification is controlled by aeration, the activity of methanogenic bacteria is inhibited, the hydrolysis bacteria is domesticated, the aerobic bacteria is cultivated to form a zooglea, the slurry has good sedimentation performance, the SV30 reaches 40%~60%, the carbon source slurry with good sedimentation performance is separated by an integrated scum scraping sedimentation machine, the separated clear liquid effluent SS is controlled within 1000~3000 mg / L, and the SS of the clear liquid is better than that of two centrifugal machines.Thus, the investment of expensive solid-liquid centrifuge is replaced, the operation cost of medicaments, water and electricity is greatly reduced, the high alkalinity is supplemented by adding anaerobic digestion biogas liquid, the pH in the hydrolysis environment is improved, the biogas liquid is reused, the feeding ratio of biogas liquid and kitchen waste fermentation slurry is controlled between 1:1 and 2:1, the pH in the hydrolysis and fermentation can be stably controlled between 5.5 and 6.5, the medicament cost of supplementing alkalinity is reduced, the investment of biogas liquid treatment sewage equipment is reduced, and the cost of separate biogas liquid treatment is avoided, after the kitchen waste slurry is hydrolyzed and fermented to produce carbon source, the liquid phase reaches the high standard carbon source product, the upper floating sludge is separated by the scraper and pumped to the in-situ desulfurization tank, the bottom precipitated material is also pumped to the in-situ desulfurization tank, and the in-situ desulfurization tank is subjected to anaerobic fermentation to produce biogas. The in-situ desulfurization tank is subjected to anaerobic digestion for 30-45 days to fully decompose carbon source compounds, proteins and oils, and the decomposed biogas liquid contains a large amount of organic raw materials such as humic acid and cellulose. After the biogas liquid is separated by the two-phase centrifuge, the solid phase biogas residue is subjected to fermentation composting and can be used as organic fertilizer for garden planting, and the liquid phase is used for supplementing alkalinity in the directional fermentation carbon source tank 1. The solid phase resource recycling utilization of hydrolysis and fermentation carbon source separation is realized, the use of sewage equipment is avoided, the facility investment is reduced, the operation cost is reduced, the maximum utilization of resources is achieved, the hydrogen and carbon dioxide generated in the hydrolysis and fermentation process are collected and transported to the in-situ desulfurization tank for anaerobic fermentation, the methanogenic bacteria are used to convert the hydrogen and carbon dioxide into biogas. Under the condition of micro-oxygen environment, the ORP is controlled between-350mv and-450mv, H2S can be oxidized into elemental sulfur, the removal rate of hydrogen sulfide in biogas reaches more than 95%, and the concentration of hydrogen sulfide is reduced to less than 200ppm. The investment of the present application treats the foul gas and hydrogen sulfide, reduces the investment of desulfurization and deodorization device, and improves the biogas yield. The resource recycling and reduction are fully realized.

[0032] Reference Figure 1 The central stirrer 32 is installed in the directional fermentation carbon source tank 1, and the tank is in a complete mixing state through the setting of the central stirrer 32.

[0033] Reference Figure 1 The side stirrer 33 is installed in the in-situ desulfurization anaerobic tank 3, and the aeration efficiency is improved through the setting of the side stirrer 33.

[0034] Reference Figure 1 The inclined plate 34 is bolted to the inner wall of the sediment tank 2, and the particles in the liquid are enriched through the setting of the inclined plate 34.

[0035] Reference Figure 1 The overflow weir 35 is bolted to the inner wall of the sediment tank 2, and the liquid level in the sediment tank 2 is limited through the setting of the overflow weir 35.

[0036] Reference Figure 1The inner wall of the directional fermentation carbon source tank 1 is bolted with a baffle 36. By arranging the baffle 36, the flow rate is reduced.

[0037] With reference to Figure 1 The bottom of the directional fermentation carbon source tank 1 is in the shape of a hopper. By arranging the bottom of the directional fermentation carbon source tank 1 in the shape of a hopper, the sand and heavy materials are conveniently rotated to the bottom by centrifugation.

[0038] With reference to Figure 1 The surface of the in-situ desulfurization anaerobic tank 3 is communicated with a water seal 37. By arranging the water seal 37, the gas is prevented from entering the in-situ desulfurization anaerobic tank 3.

[0039] The use process is briefly described as follows: the kitchen waste slurry is prepared by directional fermentation of carbon source, in the initial start-up period, the pH in the directional fermentation tank is controlled by adding alkali liquor, the alkali addition ratio is 1 ‰ ~ 5 %, and the pH is controlled to be 5.5 ~ 7.0; after the original desulfurization anaerobic tank 3 is started, the biogas slurry and the biogas residue are separated from the anaerobic digestion liquid by a solid-liquid separator, the biogas slurry can be returned to the hydrolysis tank as an alkali source for supplement, the addition ratio of the biogas slurry and the kitchen waste slurry is controlled to be 1:1 ~ 2:1, and the pH can be controlled to be 5.5 ~ 6.5; the bottom of the directional fermentation tank is uniformly provided with a part of microporous aeration discs / tubes, a kitchen waste slurry feeding pipe, a biogas slurry return pipe and an alkali adding pipe, which are all arranged at the bottom, so that the materials can be uniformly mixed; a central stirrer 32 is arranged in the fermentation tank, and is cooperated with aeration to realize a complete mixing state in the tank; a conical hopper shape is arranged at the bottom of the tank, and the sand and heavy materials are rotated to the bottom by centrifugation, and then are pumped to the original desulfurization anaerobic tank 3 by a pump, and then are separated by a solid-liquid centrifugal separator; the carbon source solid-liquid separation is realized by an integrated sludge scraping and sedimentation machine, the overflowed materials of the directional fermentation carbon source tank 1 enter the integrated sludge scraping and sedimentation machine, the flow rate is reduced by a baffle 36, and at the same time, the materials are branched, so that the high flow is avoided to stir the sediment and is not conducive to the sedimentation, the gas bubbles and floating sludge in the materials are scraped to a sludge hopper by a scraper in a counterclockwise direction, and the materials with heavy particles in the liquid phase are precipitated to the bottom through an inclined plate 34, and the sludge is regularly discharged to ensure that there is no obvious suspended matter in the effluent; the equipment is provided with a deodorization pipeline which is communicated with a deodorization pipeline of the directional fermentation carbon source tank 1, and is pumped to the original desulfurization fermentation tank for deodorization; the liquid level height in the integrated sludge scraping and sedimentation machine is adjusted by the height of the overflow hole of the outlet, and the height can be adjusted up and down; the SS of the clear liquid separated by the integrated sludge scraping and sedimentation machine is 1000 ~ 3000 mg / L, the NH3-N concentration is 800 ~ 1200 mg / L, the SCOD concentration is 40 ~ 70 g / L, and the VFA concentration is 15 ~ 28 g / L; in order to ensure that the SS in the clear liquid is less than 500 mg / L, a tubular ultrafiltration or immersed ultrafiltration can be arranged for solid waste separation; the original desulfurization anaerobic tank 3 is used for digestion and deodorization, and the sludge separated by the integrated sludge scraping and sedimentation machine contains carbohydrates, proteins and fats, and is pumped to the original desulfurization anaerobic tank 3, and after 30 ~ 45 days of anaerobic digestion, carbon dioxide, water, CH4 and other substances are generated, in the environment with an oxidation-reduction potential of-350 mv ~-450 mv, the desulfurization bacteria attached to the filler oxidize the sulfur element by using oxygen to oxidize H2S gas, so as to realize the effect of biological desulfurization.The in-situ desulfurization anaerobic tank 3 is arranged with 1.5-2.0 fillers in the upper part, the bottom is uniformly arranged with a gas pipeline, the in-situ desulfurization anaerobic tank 3 is aerated, the system environment is maintained in a micro-oxygen state, the oxygen content is 2-5 times of the sulfur content, a biogas tank 23 is arranged at the top of the in-situ desulfurization anaerobic tank 3, a side stirrer 33 is arranged in the tank, the tank is kept in a complete mixing state, the digested material is separated into biogas slurry or biogas residue through a two-phase centrifuge, the biogas slurry is returned to the directional fermentation carbon source tank 1, the biogas residue is used for anaerobic compost fermentation, and finished product organic fertilizer is prepared, which can be used as a fertilizer or a soil conditioner for garden cultivation, and the biogas collected by the gas tank 23 is delivered to a biogas purification engineering or a biogas power generation device 30 through a Roots blower.

[0040] The specific embodiments are only an explanation of the present application, and are not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the specification, as long as the modifications are within the scope of the claims of the present application, and are protected by the patent law.

Claims

1. A carbon source preparation device for a kitchen wastewater system, comprising a directional fermentation carbon source tank (1), a sedimentation tank (2) and an in-situ desulfurization anaerobic tank (3), characterized in that, The surface of the directional fermentation carbon source tank (1) is communicated with an organic slurry inlet pipe (4), a biogas slurry backflow pipe (5) and a liquid alkali pipe (6), the surface of the directional fermentation carbon source tank (1) is communicated with a first air blower (7), the inner wall of the directional fermentation carbon source tank (1) is bolted with a first aeration pipe (8), the surface of the directional fermentation carbon source tank (1) is communicated with a first pH meter (9), a first ORP meter (10) and a DO instrument (11), the top of the directional fermentation carbon source tank (1) is provided with a mist eliminator (12), the surface of the directional fermentation carbon source tank (1) is communicated with a first carbon source discharge pipe (13), the other end of the first carbon source discharge pipe (13) is communicated with a first feeding pipe (14), and the first feeding pipe (14) is communicated with the top of the sediment tank (2), the inside of the sediment tank (2) is provided with a scum scraper (15), the surface of the sediment tank (2) is communicated with a second carbon source discharge pipe (16), the surface of the sediment tank (2) is communicated with a second deodorization pipe (17), the bottom of the directional fermentation carbon source tank (1) is communicated with a first sludge discharge pump (18), the output end of the first sludge discharge pump (18) is communicated with a second sludge discharge pump (19), and the output end of the second sludge discharge pump (19) is communicated with the bottom of the sediment tank (2), the output end of the mist eliminator (12) is communicated with a first deodorization pipe (20), the second deodorization pipe (17) is communicated with the first deodorization pipe (20), the other end of the first deodorization pipe (20) is communicated with an aeration Roots blower (21), the output end of the aeration Roots blower (21) is communicated with a second aeration pipe (22), the second aeration pipe (22) is fixedly sleeved with the inner wall of an in-situ desulfurization anaerobic tank (3), the top of the in-situ desulfurization anaerobic tank (3) is provided with a gas cabinet (23), the surface of the gas cabinet (23) and the surface of the in-situ desulfurization anaerobic tank (3) are communicated with a biogas pipe (24), the surface of the gas cabinet (23) is communicated with an outer membrane air blower (25), the surface of the in-situ desulfurization anaerobic tank (3) is communicated with a discharge circulating pump (26), the output end of the discharge circulating pump (26) is communicated with the surface of the in-situ desulfurization anaerobic tank (3), the output end of the discharge circulating pump (26) is communicated with a second pH meter (27) and a second ORP instrument (28), the surface of the gas cabinet (23) is communicated with a biogas Roots blower (29), the output end of the biogas Roots blower (29) is communicated with a biogas power generation device (30), the second feeding pipe (31) is communicated between the first sludge discharge pump (18) and the second sludge discharge pump (19), and the other end of the second feeding pipe (31) is communicated with the surface of the in-situ desulfurization anaerobic tank (3), the surface of the in-situ desulfurization anaerobic tank (3) is communicated with a water seal (37), and the inside of the directional fermentation carbon source tank (1) is provided with a central stirrer (32).

2. The carbon source preparation device for a kitchen wastewater system according to claim 1, characterized in that, The inside of the in-situ desulfurization anaerobic tank (3) is provided with a side stirrer (33).

3. The carbon source preparation device for a kitchen wastewater system according to claim 1, characterized in that, The inner wall of the sediment tank (2) is bolted with an inclined plate (34).

4. The carbon source preparation device for a kitchen wastewater system according to claim 1, characterized by, The inner wall of the sediment tank (2) is bolted with an overflow weir (35).

5. The carbon source preparation device for a kitchen wastewater system according to claim 1, characterized in that, The inner wall of the directional fermentation carbon source tank (1) is bolted with a baffle (36). The inner wall of the directional fermentation carbon source tank (1) is bolted with a baffle (36).

6. The carbon source preparation device for a kitchen wastewater system according to claim 1, characterized by, The bottom of the directional fermentation carbon source tank (1) is in the shape of a cone bucket.

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