36 results about "Sludge fermentation" patented technology

The utility model provides a sludge fermentation treatment agent adding assembly, and belongs to the technical field of sludge treatment equipment. The sludge fermentation treatment agent adding assembly comprises a bottom plate and a cleaning assembly. A pesticide barrel is installed on the surface of the bottom plate, a stirring piece is connected to the bottom of the pesticide barrel, the cleaning assembly comprises a supporting rod and a rotating rod, the rotating rod is rotatably installed on the upper surface of the supporting rod, a lifting plate is slidably arranged on the upper surface of the rotating rod, and a lead screw is connected to an output shaft of the first motor. The surface of the lead screw is sleeved with a scraping piece in a threaded mode, and the scraping piece is attached to the inner wall of the medicine adding pipe. According to the sludge fermentation treatment device disclosed by the utility model, the stirring piece is beneficial to mixing of a sludge fermentation treatment agent, the scraping piece is attached to the inner wall of the agent adding pipe through the cooperation of the supporting rod, the rotating rod and the lifting plate, and then the scraping piece moves downwards along the inner wall of the agent adding pipe through the cooperation of the first motor and the screw rod; and the possibility that the medicament is easy to adhere to the pipe wall of the dosing pipe is reduced.

The utility model discloses a small-scale test device for research on anaerobic fermentation of granular sludge. The small-scale test device comprises a fermentation bottle, a granular sludge feeding component, a granular sludge sampling component, an exhaust component and a stirring and mixing device, the granular sludge feeding and sampling component comprises a sample feeding pipe and a sampling pipe which penetrate through the sealing rubber plug of the fermentation bottle, the sample feeding pipe and the sampling pipe enter the fermentation liquid in the fermentation bottle, the feeding pipe is provided with a manual ball valve, and the sampling pipe is provided with a manual ball valve and a check valve. The exhaust component comprises an exhaust pipe, a manual ball valve and an air collecting bag, the exhaust port is connected with the air collecting bag, and a closed environment is kept. The stirring device comprises a stirring rotor and a magnetic stirrer which are arranged in the fermentation bottle, and fermentation liquor is kept uniform in the sampling process. According to the small-scale test device for the granular sludge anaerobic fermentation research, the difficulty in a granular sludge fermentation test can be solved, the device is simple to assemble, the sampling is uniform and sufficient, and the anaerobic environment is stable.

The resource utilization type sewage treatment equipment comprises a box body internally provided with a containing cavity, the box body is provided with a water inlet and a water outlet, three partition plates are arranged in the containing cavity at intervals, and the containing cavity is divided into a primary sedimentation tank, an anaerobic fermentation tank, a sludge fermentation tank and a reuse water storage tank which are sequentially communicated. According to the utility model, the accommodating cavity is divided into the primary sedimentation tank, the anaerobic fermentation tank, the sludge fermentation tank and the recycled water storage tank which are sequentially communicated through the three partition plates, large-particle impurities in sewage are subjected to hydrolytic acidification and sedimentation in the unit through the primary sedimentation tank, and then microorganism-attachable suspended filler is added through the anaerobic fermentation tank; the acidified and hydrolyzed sewage is deeply fermented and decomposed by anaerobic microorganisms in the area and is further purified. And the sludge fermentation tank is divided into an anaerobic sludge fermentation zone, a three-dimensional filter material microbial reaction zone, a microporous ceramsite adsorption zone and gravel filtration plant absorption from bottom to top, so that the ultimate purification of water quality is achieved.

The utility model belongs to the technical field of sludge treatment, and particularly relates to sludge aerobic fermentation equipment which comprises a fermentation tank body, an upper bearing seat is arranged in the middle of an upper cover at the top of the fermentation tank body, and an upper flange is arranged above the upper bearing seat; the stirring main shaft is hollow, a hot oxygen inlet is formed in the bottom of the stirring main shaft, stirring blades are arranged outside the stirring main shaft, and hot oxygen discharge holes are formed in the shaft wall; the upper end of the stirring spindle is connected with an upper bearing seat; a lower bearing seat connected with the lower end of the stirring main shaft is arranged in the middle of the base; the lower end of a thrust shaft in the thrust bearing seat bracket is connected with the upper flange through a universal coupling; a retaining pawl and a retaining ratchet wheel are arranged on the retaining pawl frame; the retaining ratchet wheel is fixedly connected with the thrust shaft; the ratchet wheel assembly is positioned below the lower bearing seat and comprises a ratchet wheel cover and a rocker arm; the end, away from the rotating spindle, of the rocker is connected with a hydraulic pushing mechanism. According to the sludge fermentation device, a heat source and oxygen can be uniformly distributed in a material, the sludge fermentation efficiency is effectively improved, and the sludge fermentation device has a relatively good market application prospect.

The utility model provides a sludge aerobic fermentation bin, which relates to the technical field of sludge aerobic fermentation, and comprises a sludge fermentation bin body, a bin top cover plate is fastened and fixed on the upper end surface of the sludge fermentation bin body, the middle part of the bin top cover plate is movably connected with a limiting turntable, the outer surface of the limiting turntable is provided with a bull gear, and the bull gear is meshed with the bull gear. A first motor is connected to the right side of the large gear through a small gear, a lifting frame is connected to the upper end of the limiting rotary disc through an electric push rod, a transmission rod is connected to the left side of the lifting frame through a bearing, spiral mud conveying blades are fixed to the surface of the transmission rod, and a second motor is connected to the right end of the transmission rod through a transmission wheel and a transmission belt. A fixing shaft is welded to the center of the lower surface of the limiting rotary disc, and stirring blades are installed on the surface of the fixing shaft at equal intervals. The utility model solves the problem that in the prior art, sludge at the center in the fermentation bin is difficult to turn towards the outer end by rotating stirring blades, so that the temperature in the bin is not well controlled and the fermentation effect is influenced.

The utility model relates to the technical field of sludge fermentation, in particular to a sludge-water separation device for activated sludge fermentation, which comprises a conical barrel and is characterized in that the upper end of the conical barrel is fixedly connected with a barrel cover, and the lower end of the barrel cover is rotatably provided with a rotating rod through a driving part; a plurality of funnels are arranged on the outer wall of the rotating rod from bottom to top in a linear array mode through connecting pieces, the lower ends of the funnels fixedly communicate with round pipes, a stirring piece is arranged on the outer wall of one round pipe, and a round rod is arranged at the position, close to the edge of one side, of the lower end of the barrel cover through an elastic mechanism; a plurality of scraping plates are fixedly connected to the front portion of the outer wall of the round rod from top to bottom in a linear array mode, a limiting piece is arranged between the round rod and the barrel cover, and a feeding port fixedly communicates with the position, close to the edge of the front portion, of the upper end of the barrel cover. According to the settling separation device, the settling separation efficiency is guaranteed, the size of the settling separation device is reduced, and the problem of large occupied space is solved.

The invention belongs to the technical field of sewage sludge treatment and recycling, and provides a method and a device for producing a high-quality carbon source for short-cut denitrification by directional regulation and fermentation of sludge. The method comprises the following steps: (1) adding sludge with the solid content of 2-5% into a reaction tank of a device for producing short-cut denitrification by directional regulation and control of sludge fermentation, sealing the reaction tank, and aerating the sludge in the reaction tank under a stirring condition to realize directional fermentation; the aeration flow is controlled to be 6-120 L / (kg VSS.h), the gas introduced by aeration is air, and the pressure intensity of the reaction tank is controlled to be normal pressure; and (2) carrying out solid-liquid separation on the fermentation liquor obtained after directional fermentation in the step (1) to obtain a liquid phase which is the high-quality carbon source for short-cut denitrification and contains volatile fatty acid with acetic acid as a main component. According to the method, directional acetic acid production through sludge fermentation can be realized on the basis of not additionally adding medicaments, the medicament cost is reduced, the process operation is simplified, and the yield of volatile fatty acid and the acetic acid proportion during sludge fermentation are improved.

The invention provides a flowing capacitive deionization system and method for selectively recovering carbon, nitrogen and phosphorus in alkaline fermentation broth, and relates to the field of alkaline fermentation broth treatment.The flowing capacitive deionization system comprises a first collector plate, a first anion exchange membrane, a second anion exchange membrane, a cation exchange membrane and a second collector plate which are sequentially distributed in parallel from left to right; the area between the first collector plate and the second anion exchange membrane is an anode flow electrode chamber, the area between the cation exchange membrane and the second collector plate is a cathode flow electrode chamber, and the area between the second anion exchange membrane and the first anion exchange membrane is an acid liquid membrane chamber; through the innovative structure that the acid liquid membrane chamber is clamped by the two membranes, efficient selective separation and synchronous recycling of carbon, nitrogen and phosphorus in the sludge fermentation liquid are achieved for the first time, no chemical additive is added in the whole process, and an industrialized technical path is provided for solving the contradiction between carbon source shortage and nitrogen and phosphorus pollution of a sewage plant.

The invention relates to the technical field of tailing treatment, and particularly discloses a tailing composite modifier for acid soil treatment and a preparation method thereof.The tailing composite modifier is prepared from, by weight, 30-60 parts of alkaline conditioning materials, 20-50 parts of organic matter materials, 10-30 parts of mineral adsorption materials, 0.5-5 parts of microbial agents and 10 parts of tailing powder. The alkaline conditioning material is selected from one or more of quick lime, slaked lime, calcium carbonate, dolomite powder, steel slag, carbide slag and red mud, and the organic matter material is selected from one or more of humic acid, weathered coal, decomposed straw, decomposed livestock and poultry manure, biochar and organic sludge fermentation products. The mineral adsorption material is selected from one or more of bentonite, sepiolite, zeolite, vermiculite, attapulgite and ardealite. According to the tailing composite modifier for acidic soil treatment and the preparation method of the tailing composite modifier, efficient, stable and long-acting ecological restoration can be carried out on acidic soil.

The present application belongs to the field of oligocarbon source sewage biological treatment technology, in particular to a device and method for fermentation enhanced sewage denitrification and phosphorus removal and sludge reduction, comprising a main stream sewage treatment system and a side stream sludge fermentation system, wherein the main stream sewage treatment system comprises a sequencing batch reactor of cyclic activated sludge method (CASS); a partition plate with water passing holes is arranged in the sequencing batch reactor, and the sequencing batch reactor is divided into a pre-mixing zone and a main reaction zone by the partition plate with water passing holes; the device has a high-efficiency side stream enhancement effect, the side stream sludge treatment capacity is small (only 3% to 20% of the side stream flow rate is used to treat the sludge), and the treatment time is short (the sludge fermentation time is less than 96 h); no chemicals need to be added, and pH and heating need not be controlled during the fermentation process; only anaerobic fermentation of the refluxed sludge at room temperature can improve the main stream denitrification and phosphorus removal efficiency, reduce the total nitrogen and total phosphorus in the effluent, realize the denitrification and phosphorus removal treatment of oligocarbon source (COD / TN<8) municipal sewage to meet the standards, and has the characteristics of economy and high efficiency.

The invention discloses a method for repairing a slag yard by in-situ fermentation of bagasse sludge, and relates to the technical field of slag yard repairing, the method comprises the following steps: pretreatment and mixing of raw materials: collecting fresh bagasse and sludge dehydrated by a plate-and-frame filter press; the bagasse and the sludge are cooperatively utilized, recycling of resources is achieved, the pressure of waste on the environment is greatly relieved, meanwhile, the remediation cost is greatly reduced, through the innovative sectional type in-situ fermentation technology, the temperature, humidity, oxygen and other key conditions are monitored in real time and precisely regulated and controlled through a high-precision sensor, and the remediation efficiency is improved. The microbial activity can be fully stimulated, bagasse and sludge fermentation and decomposition can be accelerated, efficient and rapid repairing of the slag field is achieved, the repairing period is shortened, in the whole repairing process, a large number of chemical agents are not used, the risk of secondary pollution is effectively reduced, and fermentation products can improve the soil structure of the slag field, improve fertility and further reduce the activity of heavy metal; and environment-friendly restoration is realized.

This invention discloses an apparatus and method for achieving deep nitrogen removal and phosphorus recovery through dual short-range coupled anammox fermentation using in-situ sludge fermentation. First, calcium chloride solution is added to the anammox reactor at the rear end of a two-stage PNA process to form recoverable phosphorus crystals such as Ca-P precipitates. Anaerobic ammonia oxidizing bacteria attach to the surface of the precipitates, thereby enriching and retaining them within the anammox reactor. During the continuous formation of anaerobic ammonia oxidizing particles, unfermented waste activated sludge is added to the PNA process. The slow hydrolysis and acidification of the waste activated sludge provide a carbon source for the short-range denitrifying bacteria, completing the transformation from single-stage PNA autotrophic nitrogen removal to dual short-range coupled anammox synergistic nitrogen removal. In this invention, the anaerobic ammonia oxidizing bacteria in the granular sludge after operation can reach 12%, 73% of the sludge exhibits a particle size greater than 200 μm, and the total nitrogen removal rate remains above 90%, with most phosphorus existing in the recoverable form of Ca-P crystals.

The application discloses a kind of municipal sewage treatment systems based on sludge activity regulation and control device optimization, belong to municipal sewage biological treatment technical field.The system includes biological treatment unit, sludge activity intelligent sorting device, sludge activity multistage conditioning tank unit, resource regeneration pond and intelligent central control platform.Biological treatment unit receives to be treated municipal sewage.Sludge activity intelligent sorting device carries out mud-water separation and activity classification to sludge mixture, and the high-activity sludge obtained enters sludge activity multistage conditioning tank unit, low-activity sludge enters resource regeneration pond, anaerobic fermentation is carried out in resource regeneration pond, and the sludge fermentation liquor produced is backflowed to sludge activity multistage conditioning tank unit by pipeline.Intelligent central control platform controls dynamic sludge pressure overflow ratio, sludge retention time, dissolved oxygen concentration, sludge fermentation liquor flow rate and other operating parameters by real-time monitoring, improves the denitrification efficiency of system and reduces operating energy consumption.

The utility model relates to the technical field of sludge fermentation processing, and particularly discloses a sludge aerobic fermentation device capable of deeply dewatering and increasing heat value, which comprises a fermentation tank, a feeding hopper is fixedly mounted on the ground on one side of the fermentation tank, and a driving motor is fixedly mounted on the outer surface of one side of the feeding hopper. A water containing disc is fixedly installed on the outer surface of one side of the feeding hopper, and a separation barrel is fixedly installed on the outer surface of the side, away from the driving motor, of the feeding hopper. According to the sludge aerobic fermentation device capable of deeply dewatering and increasing the calorific value, sludge can be stored through the feeding hopper, a large amount of sludge can be rotated and conveyed through the spiral conveying extrusion blade driven by the rotation of the driving motor, and the sludge can be continuously fed into the separation barrel to be extruded and separated; the sludge can be extruded and compressed to remove a large amount of water in the sludge, so that the reduction of the fermentation quality caused by overhigh water content during the subsequent fermentation of the sludge is reduced.

The present application relates to the sewage treatment technical field, particularly to a kind of sludge fermentation driven biological denitrification process intensification method based on anammox bacteria ultra-high speed in-situ enrichment.The present application is aimed at sludge fermentation driven biological denitrification (SFBNR) process, through the operation strategy of " short-term HRT promotion + biological carrier dosing", in the in-situ fermentation-denitrification continuous stirred reactor (SIFD-CSTR) in the process, a kind of hydrogen-producing functional strain JABWBG01sp013360575 is cultivated directionally, high-energy H2 produced by the strain is used to expand the nitrogen metabolism electron pool of anaerobic ammonia oxidation bacteria (AnAOB), to accelerate carbon sequestration and its driven cell component synthesis, realize AnAOB ultra-high speed in-situ enrichment, to promote the effluent NH4 + Efficient removal, thereby optimizing the overall denitrification effect of SFBNR process.

The utility model discloses a sludge fermentation extrusion forming machine for red brick processing, which relates to the technical field of sludge treatment and comprises a crushing box and a moving platform, a driving mechanism is mounted on the inner side of one end of the crushing box, two crushing rollers are symmetrically and rotatably connected to the inner side of the other end of the crushing box, and a screen is fixedly connected to the inner side of the crushing box. According to the sludge crushing device, the crushing rollers are driven to synchronously and reversely rotate, it is ensured that sludge is fully crushed, particles are uniform, large materials are prevented from influencing subsequent processing, the screen further screens the sludge, impurities are removed, the purity is improved, and the subsequent extrusion forming quality is optimized; the flow guide plate guides the screened sludge to smoothly flow to the discharging port, material accumulation is prevented, the conveying efficiency is improved, finally, the forming mold and the extrusion plate work cooperatively, it is ensured that the sludge is shaped and extruded, products stable in structure and uniform in shape are formed, and the finished product quality and the production stability are improved.

The invention relates to the technical field of purification, in particular to a method for advanced treatment of municipal sewage by adopting a sludge fermentation coupling OA process, and the method comprises the following steps: sequentially introducing municipal sewage in a raw water tank into a high-speed activated sludge tank and a nitrification tank of an aerobic zone, and removing organic matters and ammonia nitrogen to obtain a primary purification solution; introducing the primary purification liquid into a secondary sedimentation tank for precipitation separation to obtain supernate and bottom mud of the secondary sedimentation tank; introducing supernate of the secondary sedimentation tank into a regulating tank, mixing the supernate with fermentation liquor in the regulating tank, and performing optimization treatment to obtain mixed liquor of the regulating tank; introducing the mixed solution in the regulating tank into an anoxic zone to perform short-range and / or whole-range dissimilatory reduction of nitrate into ammonium coupled anaerobic ammonia oxidation reaction so as to remove nitrogen element; and introducing the mixed solution without the nitrogen element into a chemical phosphorus removal unit to remove the phosphorus element so as to obtain a purified solution.

The invention belongs to the technical field of biological treatment of sewage with few carbon sources, and particularly relates to a device and a method for enhancing nitrogen and phosphorus removal and sludge reduction of sewage by fermentation, the device comprises a mainstream sewage treatment system and a side flow return sludge fermentation system, the mainstream sewage treatment system comprises a sequencing batch reactor of a cyclic activated sludge process (CASS); a partition plate with water passing holes is arranged in the sequencing batch reactor, and the sequencing batch reactor is divided into a premixing area and a main reaction area by the partition plate with the water passing holes; the device has an efficient lateral flow enhancement effect, the lateral flow sludge treatment amount is small (only 3%-20% of lateral flow return sludge is treated), and the treatment time is short (the sludge fermentation time lt; in the fermentation process, chemicals are not required to be added, pH and heating are not required to be controlled, and the main flow nitrogen and phosphorus removal efficiency can be improved, the total nitrogen and total phosphorus of effluent can be reduced and an oligocarbon source (COD / TNlt) can be realized by only relying on anaerobic fermentation of the returned sludge at room temperature; and 8) the nitrogen and phosphorus removal treatment of the urban sewage reaches the standard, and the method has the characteristics of economy and high efficiency.

The invention discloses a device and a method for treating sludge digestion liquid by coupling short-cut nitrification / anaerobic ammonia oxidation-sludge in-situ fermentation with short-cut denitrification / anaerobic ammonia oxidation. Sludge digestion liquid firstly enters the short-cut nitrification coupling anaerobic ammonia oxidation reactor to be subjected to anoxic stirring, and residual nitrate nitrogen in the last period is removed through denitrification of organic matter in raw water; after the anoxic stirring is finished, aeration stirring is performed, ammonia nitrogen in the sewage is converted into nitrite nitrogen by short-cut nitrification, the generated nitrite nitrogen and the residual ammonia nitrogen in the sewage are subjected to anaerobic ammonia oxidation reaction to generate nitrate nitrogen, precipitation and drainage are performed after the reaction is finished, and wastewater containing nitrate nitrogen enters a middle water tank. Water in the middle water tank and a part of the sludge digestion liquid enter the sludge in-situ fermentation coupling short-cut denitrification / anaerobic ammonium oxidation reactor together, and deep denitrification is realized under the combined action of hydrolytic acidification bacteria, denitrifying bacteria and anaerobic ammonium oxidation bacteria in the granular sludge. The method does not need additional carbon sources, saves aeration energy consumption, and is low in sludge yield.

The application discloses a kind of residual sludge in situ fermentation driven anaerobic ammonia oxidation self-enrichment device and method, the device includes raw water tank, whole course nitrification reactor, intermediate water tank, reactor sludge fermentation driven short-cut denitrification simultaneous anaerobic ammonia oxidation reactor, effluent bucket.The application uses the above-mentioned residual sludge in situ fermentation driven anaerobic ammonia oxidation self-enrichment device and method, and carbon source generated by residual sludge fermentation is used as electron donor to drive short-cut denitrification / anaerobic ammonia oxidation reaction, realizes residual sludge resource under the condition that no additional carbon source is needed, and utilizes sponge filler as carrier to carry out in situ self-enrichment of anaerobic ammonia oxidation bacteria, constructs integrated sludge fermentation simultaneous short-cut denitrification / anaerobic ammonia oxidation system, can provide a solution for deep denitrification of urban sewage and sludge reduction, and has important significance for realizing sustainable urban domestic sewage treatment.

The application relates to the technical field of turf, and discloses a multi-layer composite nutrient turf, which sequentially comprises a bottom substrate layer, a middle substrate layer, a top substrate layer and a seed layer, the top substrate layer comprises first fermentation products of sludge fermentation in the 10th-15th day, the middle substrate layer comprises second fermentation products of sludge fermentation in the 20th-30th day, and the bottom substrate layer comprises third fermentation products of sludge fermentation in the 45th-60th day. The fermentation products in different fermentation stages are layered and paved on the seedling layer, a gradient nutrient structure matched with the growth development stage and the spatial distribution of the turfgrass root system is constructed, the germination rate of the turfgrass on the turf is effectively improved, the nutrients of the turfgrass in each growth stage are met, and the turf coverage is improved.

This invention provides a soilless cultivation substrate composition and its application. The soilless cultivation substrate composition includes a first component and a second component. The first component includes modified phosphogypsum, a first municipal sludge fermentation product, an alkaline buffer, perlite, phosphate-solubilizing bacteria, and zeolite. The second component includes modified phosphogypsum, a second municipal sludge fermentation product, and rooting powder. The first municipal sludge fermentation product has a D50 not higher than 1 mm and a D60 not higher than 2 mm; the second municipal sludge fermentation product has a D50 not lower than 3 mm and a D60 not lower than 4 mm. The modified phosphogypsum has a median particle size of 200-300 mesh, a pH of 6.0-8.0, a fluoride ion mass percentage not higher than 0.1%, and a Cd ion content not higher than 0.5 mg / kg. This soilless cultivation substrate composition can achieve efficient utilization of phosphogypsum and municipal sludge, achieve good greening effects, and improve plant survival rates.

The invention belongs to the technical field of environmental protection, and discloses a method for increasing the yield of short-chain fatty acid in sludge by activating persulfate with ferrous citrate, which comprises the following steps: naturally settling sludge, removing supernate to obtain concentrated sludge, adding ferrous citrate and persulfate into the concentrated sludge, putting into a constant-temperature shaking table, sufficiently and uniformly mixing, filtering, and drying to obtain the short-chain fatty acid in the sludge. And filling nitrogen to remove oxygen, sealing, and carrying out anaerobic fermentation in a constant-temperature shaking table to produce the short-chain fatty acid. Ferrous citrate reacts with persulfate to generate sulfate free radicals and hydroxyl free radicals, meanwhile, citric acid serves as a chelating agent and can effectively complex Fe < 2 + > to prevent ferrous ions from being oxidized too fast, the continuous generation capacity of the free radicals is enhanced, and therefore sludge extracellular polymeric substances and cellular structures are remarkably damaged, and full release of organic matter is promoted. Not only is the yield of short-chain fatty acid in the sludge fermentation liquor greatly increased, but also the anaerobic fermentation time can be effectively shortened, and the treatment effect is better than that of single sodium carbonate activation or pure ferric salt activation.

The application provides a dynamic bacteria inhibition equipment for sludge treatment, which comprises a frame body and a storage bin mounted on the frame body, the storage bin comprises a shell inner layer, a shell middle layer and a shell outer layer, a plurality of connecting parts are arranged between the shell inner layer and the shell middle layer, and the shell inner layer and the shell middle layer are separated into multiple groups of air channels by the connecting parts. Through the synergistic effect of low-temperature environment, nitrogen environment and ultrasonic waves, multi-dimensional bacteria inhibition is realized. The semiconductor refrigerating sheet group, the temperature sensor and the PID temperature controller are matched to control the temperature in the storage bin at 4±1 DEG C, effectively inhibit the protein synthesis of thermophilic bacteria, reduce the reproduction rate of the thermophilic bacteria, the nitrogen gas is sprayed out of the micropores of the bin wall to form a dynamic gas film layer, a low-oxygen environment is created, the activity of aerobic microorganisms is inhibited, the low-frequency ultrasonic waves generated by the ultrasonic transducer destroy the microbial biofilm structure by cavitation effect, interfere with the aggregation of bacterial flora, comprehensively delay the sludge fermentation and corruption, and the sludge storage quality is improved.

The invention relates to a method and a device for deeply purifying urban sewage by using an AOA (Automated Optical Architecture) process. According to the method for deeply purifying the municipal sewage by applying the AOA process, the sludge in the anaerobic zone is subjected to anaerobic fermentation to provide a carbon source for the anoxic zone, so that the problem of treatment of a large amount of excess sludge is effectively solved, and the natural defects of lack of carbon sources and low C / N of the domestic sewage are overcome; meanwhile, the defect that additional chemical phosphorus removal is needed for sludge fermentation of a traditional secondary sedimentation tank is also avoided; besides, sludge circulation of the aerobic zone and the anoxic zone can be blocked through ingenious arrangement of the secondary sedimentation tank, the stability of a microbial flora structure of the anoxic zone is ensured, and the anoxic zone takes anaerobic ammonium oxidation bacteria as unique functional bacteria to carry out a process of coupling short-range nitrate dissimilatory reduction into ammonium and anaerobic ammonium oxidation. The problem of performance fluctuation caused by large fluctuation of water quality and water quantity of raw water can be solved, and meanwhile, starting, operation and maintenance are simpler and more convenient.

The invention discloses a method for synchronously treating sulfate wastewater and excess sludge of a sewage plant based on mutual promotion of sulfur and carbon metabolism, and belongs to the field of water pollution control and resource recycling. According to the invention, the residual sludge of the sewage plant is used as a unique carbon source to realize synchronous treatment of sulfate wastewater and sludge in situ. The addition amount of 200-800mg / L of sulfate radicals has a remarkable promotion effect on the fermentation of the excess sludge, so that the theoretical fermentation acid yield in a sludge fermentation coupling sulfate reduction system can be increased by 1.4-6.6 times, the removal rate of high sulfate radicals reaches 97%, and the recovery amount of elemental sulfur reaches up to 12.9% of the total dry weight of the sludge. Under different sulfate radical concentrations, the sludge reduction rate within 12 days of fermentation is increased by 15%-65%. Meanwhile, a sulfur reduction product capable of accelerating the fermentation process is produced in the sulfate reduction process, so that mutual promotion of sulfur metabolism and carbon metabolism is realized. According to the method, additional organic matters and additional pretreatment means are not needed, and sulfate wastewater treatment and waste sludge resource utilization of a sewage plant can be realized in situ.

The utility model discloses a sludge fermentation equipment spiral aeration structure, the upper end of hollow rotating shaft projects the cover of fermentation equipment, and the contact place of both is provided with bearing, aeration spiral bend pipe and hollow rotating shaft fixed whole, and both are communicated, so that the fermentation inner chamber of fermentation equipment jar body all has aeration spiral bend pipe in longitudinal position correspondence, the top of hollow rotating shaft is communicated with aeration equipment, and the lower end of hollow rotating shaft is corresponded with the bucket -shaped of liquid collecting tank, and the upper end surface of liquid collecting tank is filter screen, and the fermentation liquid produced in fermentation process is gathered in liquid collecting tank after filtering through filter screen, and the bottom of liquid collecting tank is provided with liquid suction opening, and the bottom of hollow rotating shaft projects the bottom of liquid collecting tank after and motor butt joint, and the contact place of hollow rotating shaft and filter screen and the bottom of liquid collecting tank all is provided with bearing. The utility model discloses through the pertinence design, has solved the technical pain point of traditional sludge fermentation equipment aeration uneven, fermentation liquid processing difficult, maintenance cost high comprehensively.

This application relates to the technical field of wastewater treatment, specifically disclosing a sludge fermentation method for municipal wastewater treatment, comprising the following steps: mixing sludge, fermentation compound agent, pest control compound agent, and water evenly and stirring for 15-18 hours, followed by filtration to obtain fermented sludge; the pest control compound agent includes bactericides, insecticides, and heavy metal removal agents, wherein the bactericides include a hyperbranched polyester bactericide and penicillin in a weight ratio of (2.5-3):(1.2-1.5), and the fermentation compound agent includes *Trichoderma reesei*, *Candida*, *Aspergillus*, cellulase, and pectinase. The method of this application can be used to treat municipal wastewater, and has the advantages of reducing the harmful content of fermented sludge, realizing sludge recycling and reuse, and having a simple procedure.

The application discloses an energy-saving and environment-friendly sludge fermentation deodorization device and process, and belongs to the technical field of sludge treatment. The energy-saving and environment-friendly sludge fermentation deodorization device and process comprise a shell, a heat exchange pipe is arranged around the first conveying pipe, the heat exchange pipe is arranged in the shell, the heat exchange pipe is filled with a heat-conducting medium, and the heat-conducting medium is used for absorbing the heat of fermentation materials and transferring the heat to the gas in the first conveying pipe when the temperature of the fermentation materials is higher than the temperature of the gas in the first conveying pipe. The application solves the problem that the biological heat generated by materials is directly discharged with tail gas in the existing fermentation device, and energy is wasted. The heat exchange pipe is arranged around the first conveying pipe in the shell, the heat-conducting medium is filled in the heat exchange pipe, the heat absorption and heat release characteristics of the heat-conducting medium are utilized, the heat-conducting medium is heated, the heated heat-conducting medium releases heat to the fermentation materials through the heat exchange pipe, and the treatment efficiency of solid waste is improved.

The invention discloses a sludge fermentation acid production and resource extraction system which comprises a fermentation reactor, an acidification promotion mechanism, a separation mechanism and a recovery mechanism, the fermentation reactor is sequentially provided with a pretreatment area, a fermentation area and a post-treatment area from top to bottom, and a stirring assembly and a gas distributor are arranged in the fermentation reactor; a feed port and an exhaust port are formed in the top of the reactor, a discharge port and an acidizing fluid inlet are formed in the bottom of the reactor, the acidification promoting mechanism comprises an acidizing fluid injection pipe and an acidizing fluid circulation loop, the acidizing fluid injection pipe is spirally arranged in the fermentation reactor, and the acidizing fluid circulation loop is arranged in the fermentation reactor. The acidizing fluid circulation loop is communicated with the acidizing fluid injection pipe, a pump body is arranged on the acidizing fluid circulation loop, the pump body is communicated with the acidizing fluid inlet, the separation mechanism comprises a primary filter and a secondary ion exchange column, the primary filter is connected with the discharge port, and the secondary ion exchange column is connected with the acidizing fluid injection pipe. The secondary ion exchange column is communicated with the primary filter, the recovery mechanism comprises a heat exchanger and a gas storage tank, and the heat exchanger is respectively connected with the exhaust port and the gas storage tank through pipelines. The sludge fermentation acid production and resource extraction system provided by the invention has the advantages of low energy consumption and deep resource recovery.