86 results about "Sludge fermentation" patented technology

The invention relates to the technical field of organic fertilizer preparation and waste recycling, in particular to a food industrial park wastewater recycling and sludge resourceful treatment method which comprises the following steps: step 1, dynamically partitioning wastewater and cooperatively separating grease, monitoring the conductivity and turbidity of wastewater at water outlets of all workshops in real time, and dynamically dividing wastewater load grades according to monitored values; step 2, coupling biological treatment and carbon source circulation, inputting the effluent in the step 1 into an anaerobic reactor according to a real-time COD load ratio, adding a sludge glycolysis solution as a carbon source supplement, and dynamically adjusting the adding amount based on the ratio of volatile fatty acid to alkalinity; step 3, catalytic oxidation-membrane coupling advanced treatment: carrying out catalytic ozonation on aerobic effluent through sludge-based activated carbon, and adjusting the filling amount of a catalyst in a stepped manner along with characteristic parameters of organic matters in the effluent; 4, directional glycolysis of the sludge and closed-loop utilization of products. Through monitoring and dynamic adjustment, the problems of high energy consumption, low treatment efficiency, resource waste and the like in a traditional wastewater treatment method are effectively solved.

The invention discloses a method for promoting anaerobic fermentation of excess sludge to produce short-chain fatty acid, and relates to the field of environmental protection, and the method comprises the following steps: naturally settling the excess sludge, and removing supernate to obtain concentrated sludge; the method comprises the following steps: firstly, adding ammonium persulfate into concentrated sludge to completely dissolve the concentrated sludge, then adding alkali, sealing and placing the concentrated sludge in a constant-temperature shaking table for full reaction, and obtaining sludge after the reaction is finished as pretreated sludge; the pretreated sludge is directly used as a substrate and a fermentation product or inoculated sludge is used as a substrate, nitrogen is filled to expel oxygen, the mixture is sealed and then placed in a constant-temperature shaking table to be subjected to anaerobic fermentation to produce short-chain fatty acid, and pH is not adjusted in the anaerobic fermentation process. According to the method, high-activity free radicals and free ammonia are generated through reaction of alkali and ammonium persulfate to destroy extracellular polymeric substances and cells of the sludge, so that release of organic matters in the sludge is promoted, the yield of short-chain fatty acid in the sludge fermentation liquor is greatly increased, and the anaerobic fermentation time is remarkably shortened.

The invention relates to the technical field of environmental protection, and particularly discloses an efficient intensive sludge fermentation system which comprises a fermentation bin and a workshop, the workshop is divided into a plurality of layers, the topmost layer is a pretreatment workshop, the middle layers are culture workshops, hermetia illucens are cultured in the culture workshops, and the bottommost layer is an integrated workshop; the plurality of fermentation bins are uniformly distributed and tightly surround the periphery of the workshop, the plurality of fermentation bins work circularly, each fermentation bin performs independent fermentation, and a second discharge pipe and an air outlet pipe are arranged between the culture workshop and each fermentation bin. Sludge is placed in different fermentation bins one by one at intervals of one day to be subjected to closed and stacked fermentation, it can be guaranteed that fermented sludge is put into the culture workshop every day, and due to the fact that the multiple fermentation bins are evenly distributed and tightly surround the periphery of the workshop, the occupied space is small, and cost is low. And waste insect sand generated by culturing hermetia illucens in a culture workshop is utilized in fermentation of sludge, no system waste is generated and discharged, and the purposes of reducing cost and improving efficiency are achieved.

The invention discloses an enhanced biological phosphorus removal device for side-flow mixed liquid suspended solid fermentation, which comprises an urban sewage tank, a main flow reaction area and a secondary sedimentation tank, the urban sewage tank is communicated with an anaerobic tank through a water inlet peristaltic pump, the bottom outlet of the anaerobic tank is communicated with a side-flow anaerobic fermentation tank through an anaerobic tank sludge pump, and the main flow reaction area is communicated with the secondary sedimentation tank. The side flow anaerobic fermentation tank is connected into the anoxic tank I through a fermentation tank water outlet pump, the anoxic tank I, the aerobic tank I, the anoxic tank II and the aerobic tank II are sequentially communicated, the aerobic tank II is connected into the secondary sedimentation tank, a bottom outlet of the secondary sedimentation tank is connected into the pre-anoxic tank through a secondary sedimentation tank return sludge pump, and the secondary sedimentation tank outputs cleaned liquid through a secondary sedimentation tank water outlet pipe; and the aerobic tank I is connected back to the anoxic tank I through a nitrification liquid reflux pump. The invention further discloses an enhanced biological phosphorus removal method for lateral flow mixed liquid suspended solid fermentation. The invention belongs to the technical field of biological sewage treatment, and solves the problem that the traditional return sludge fermentation process needs longer SRT to realize sludge fermentation acid production.

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 invention provides a method for promoting co-fermentation of seaweed sludge to produce a carbon source by utilizing microbial pretreatment. The method comprises the following steps: adding a microbial agent with protein degradation capability into the sludge; adding free nitrous acid and rhamnolipid into the sludge obtained in the step 1, and performing pretreatment in an anaerobic environment; mixing the pretreated sludge with seaweed, and carrying out seaweed and sludge co-fermentation to obtain supernate of a fermentation mixture; the method for promoting co-fermentation of the seaweed sludge by utilizing microbial pretreatment can be widely applied to treatment and recycling of the sludge, the treatment efficiency of the sludge can be improved, and the treatment cost of the sludge can be reduced. The prepared seaweed sludge fermentation liquor can be used as an external carbon source for sewage treatment, can provide sufficient nutrient substances for microorganisms, and effectively promotes denitrification and phosphorus-accumulating bacteria metabolism in the sewage treatment process, so that the sewage nitrogen and phosphorus removal effect is improved.

The invention discloses a residual sludge in-situ fermentation driven anaerobic ammonia oxidation self-enrichment device and method. The device comprises a raw water tank, a whole-process nitrification reactor, a middle water tank, a reactor sludge fermentation driven short-range denitrification synchronous anaerobic ammonia oxidation reactor and a water outlet bucket. According to the residual sludge in-situ fermentation driven anaerobic ammonia oxidation self-enrichment device and method, a carbon source generated by residual sludge fermentation is used as an electron donor to drive short-cut denitrification / anaerobic ammonia oxidation reaction, and residual sludge recycling is achieved under the condition that an external carbon source is not needed; and sponge filler is used as a carrier for in-situ self-enrichment of anaerobic ammonium oxidation bacteria, so that an integrated sludge fermentation synchronous short-cut denitrification / anaerobic ammonium oxidation system is constructed, a solution can be provided for advanced nitrogen removal and sludge reduction of urban sewage, and the method has important significance for realizing sustainable urban domestic sewage treatment.

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 invention discloses a method for enhancing release-conversion of phosphorus in anaerobic fermentation of excess sludge by humus. In order to relieve the current situation of phosphorus resource shortage and depletion at present, the invention aims to improve the residual sludge fermentation phosphorus release performance by adding humus exogenous to the anaerobic fermentation process. The method comprises the following steps: 1, pretreating the excess sludge with low-temperature heat and acid to strengthen the disintegration and lysing efficiency of extracellular polymeric substances of the excess sludge, so as to provide sufficient substrates for subsequent anaerobic fermentation acid production and improve the release efficiency of phosphorus; 2, the pretreated sludge is subjected to anaerobic fermentation, humus is added to improve the solubility of Fe-P (Fe < 3 + > is reduced into Fe < 2 + >), and the humus and metal ions are competitively complexed to improve the release efficiency of soluble phosphorus. Compared with the method for reinforcing the release-conversion of the phosphorus in the excess sludge by the humus, the method has the advantages of low cost, no secondary pollution risk and the like, can achieve an ideal phosphorus release-conversion effect, and has important significance for realizing the recovery and recycling of phosphorus resources in the sludge.

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 discloses a device for preparing organic fertilizer through sludge fermentation, and particularly relates to the technical field of organic fertilizer preparation, the device comprises a support and a fermentation tank body fixedly arranged at the top of the support, an oxygen supply box is fixedly arranged on one side of the top of the fermentation tank body, and a temperature control assembly is arranged on the outer wall of the fermentation tank body. The temperature control assembly is arranged in the fermentation tank body and used for guaranteeing the fermentation temperature needed by sludge fermentation in the fermentation tank body, the mixing assembly is arranged in the fermentation tank body and used for stirring and mixing sludge and accelerating the fermentation rate, the temperature control assembly comprises a temperature control frame, and the fermentation temperature in the fermentation tank body is monitored in real time through a temperature sensor; cold water and hot water are respectively added into the cold water tank and the hot water tank in advance, and when the temperature in the fermentation tank body is different from the required fermentation temperature, the cold water or the hot water in the cold water tank and the hot water tank are respectively pumped into the temperature control frame by the two pumps, so that the required fermentation temperature in the fermentation tank body is guaranteed; therefore, the sludge fermentation efficiency and quality are improved.

The invention discloses equipment and a method for preparing biogas through anaerobic fermentation of biomass, and belongs to the field of biogas preparation equipment. Comprising a fermentation tank, a stirring assembly is arranged in the middle in the fermentation tank, a spraying assembly is arranged at the upper part in the fermentation tank, a water distribution pipe assembly is arranged at the lower part in the fermentation tank, and a sludge bed is arranged at the bottom of the fermentation tank; the water distribution pipe assembly is arranged above the sludge bed, the water distribution pipe assembly comprises an input pipe, and spraying holes inclining downwards are formed in the two sides of the input pipe; a plurality of biogas collecting covers are arranged at the upper part in the fermentation tank, connecting pipes are arranged at the upper ends of the biogas collecting covers, and integrated pipes are arranged on the connecting pipes. The sludge fermentation device has the beneficial effects that in the sludge fermentation process, the motor drives the scraping plate to rotate, and the scraping plate can scrape up sludge attached to a sludge bed, so that sludge accumulation is prevented. The water flow impacts the surface of the sludge bed through the spray holes which are inclined downwards, so that the effect of impacting the sludge can be achieved, and the effect of removing the sludge on the surface of the sludge bed is improved.

Provided are a carbon capture and phosphorus removal device and a carbon capture and phosphorus removal method in sewage treatment. 【Solution means】The device includes a sewage tank 1, an SBR reactor 2 communicating with the sewage tank, a denitrification reaction tank 3 communicating with the drain pipe in the middle of the SBR reactor, and an anaerobic digestion tank 4 communicating with the sludge discharge pipe at the bottom of the SBR reactor. A biochar sludge removal device 6 is provided on the anaerobic digestion tank side. The method includes steps of S1, water injection and stirring, S2, SBR treatment, S3, circulation, S4, sludge fermentation, and S5, magnetic biochar recovery. In the present invention, magnetic biochar is put into a high-load contact stabilization SBR reactor to synchronously promote the adsorption of organic carbon and phosphorus in sewage, further enhance the capture effect of dissolved organic matter, promote the adsorption of organic carbon and phosphorus in sewage, and ensure a stable and efficient carbon capture and phosphorus removal effect.

A method and device for combining in-situ and ex-situ remediation of black and odorous water body sediments belongs to the field of sludge treatment technology. The device consists of an interconnected sludge suction pump, a sludge concentration tank, a sludge fermentation tank, a tailwater treatment tank, a clear water tank, a plate and frame filter press, a tailwater storage tank, and a chemical injector. The sediment is salvaged from the river channel, gravity concentrated, and fermented in an alkaline environment to fully release the pollutants in the sediment. After fermentation, the sediment is conditioned and dehydrated to complete the ex-situ remediation of the sediment. The tailwater generated by sediment concentration and dehydration is aerobically treated, and the purified tailwater is injected into the sediment. The nitrates, calcium ions, and iron ions in the purified tailwater are used to achieve in-situ remediation of the sediment. The deficiencies of each technology can be compensated for, reducing secondary pollution from ex-situ remediation of sediment, while also reducing the cost of chemicals for in-situ remediation.

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 invention discloses a method and system for improving solid waste recycling through low-carbon intelligent addition of rhamnolipid. An intelligent control system of the system is connected with an addition system 1, a reaction system 2 and a monitoring system 3 at the same time; the monitoring system 3 is connected with the feeding system 1 and the reaction system 2; the method comprises the following steps: respectively pretreating solid wastes and rhamnolipid, carrying out anaerobic reaction in an anaerobic environment of a reaction system to generate methane gas, and conveying the gas into a gas collecting barrel; in the reaction process, the monitoring system 3 monitors the states of the feeding system and the reaction system in real time and transmits the states to the intelligent control system 4 through electric signals, the intelligent control system 4 reacts on the feeding system 1 and the reaction system 2 through analysis and fitting, and an instruction is input to control the motor power and the valve opening degree at the far end. Meanwhile, the initial addition amount of the rhamnolipid in the next time is corrected. The system has the advantages of intelligence and automation, and solves the problem of low rate of methane production by sludge fermentation in the prior art.

The present invention discloses a method for preparing sludge biomass fuel particles by mixing municipal sludge with sawdust, comprising: taking a municipal sludge sample and dividing it into I portions; adding each of the municipal sludge samples into I culture vessels; controlling the culture temperature of each of the culture vessels to correspond to I culture temperature intervals [T i‑L ,T i‑H ], in response to the colony density of the fermentation microorganisms in the culture vessel reaching a preset density, a sludge fermentation agent Y is obtained. i Put the municipal sludge into the fermentation tower, and add sawdust according to the water content of the municipal sludge to keep the water content of the municipal sludge at 45-60%; according to the temperature in the fermentation tower, inoculate the sludge fermentation agent Y i In response to the colony density of the fermentation microorganisms corresponding to the last added sludge fermentation agent reaching a preset requirement, the municipal sludge is removed and granulated to obtain biomass fuel pellets. The present invention improves the fermentation efficiency of municipal sludge, thereby improving the production efficiency of biomass fuel pellets.

The utility model provides a device for fermentation treatment of domestic sludge, and belongs to the technical field of domestic sludge. The domestic sludge fermentation treatment device comprises a filtering assembly and a stirring assembly, a stirring part is fixedly connected with the output end of a motor, firstly, the motor drives the stirring part to rotate, sludge in a tank body can be stirred through the stirring part, the fermentation speed of the sludge is increased, and the fermentation efficiency is improved; secondly, a sealing plate is slidably clamped with the tank body through an elastic clamping piece, the sealing plate is conveniently pulled away by adopting a clamping connection mode, the fermented sewage and sludge enter a filter plate, the sewage and the sludge are filtered through the filter plate, and the filter plate is slidably connected with the tank body, so that the filter plate is conveniently pulled out of the tank body; the device is simple in structure and convenient to replace or clean, so that the sludge is conveniently stirred, the fermentation speed is increased, meanwhile, the filter plate is conveniently replaced, and the practicability is improved.

The utility model relates to the technical field of environmental protection, in particular to an oily wastewater sludge fermentation resource utilization device, which promotes the dispersion speed and the dispersion effect of anaerobic zymophyte in sludge by stirring the sludge, so that the anaerobic zymophyte can uniformly ferment the sludge at each part in a fermentation tank chamber, and the utilization rate of the sludge is improved. The fermentation effect is high, use is convenient, and practicability is high; comprising a bottom plate, a support, a fermentation tank and an exhaust pipe, the fermentation tank is fixedly installed on the bottom plate through the support, a cavity is formed in the fermentation tank, the exhaust pipe communicated with the cavity is arranged on the upper portion of the fermentation tank, a valve is arranged on the exhaust pipe, a sludge discharge pipe communicated with the cavity is arranged on the lower portion of the fermentation tank, and a valve is arranged on the sludge discharge pipe. A feeding pipe communicated with the cavity is arranged in the middle of the fermentation tank, and a valve is arranged on the feeding pipe; the device further comprises a filtering mechanism, a stirring mechanism and a conveying mechanism, and the filtering mechanism is installed on the bottom plate.

The invention belongs to the field of sludge resource utilization, and particularly relates to a high-speed train excrement collector wastewater sludge reduction and resource utilization device, system and method. The device comprises a septic tank and a sludge fermentation tank which are sequentially connected, the interior of the septic tank is of a grid structure, a water inlet pipe and a water outlet pipe are arranged on the upper portion of the side wall of the septic tank, and a water ejector used for collecting sludge in different grids of the septic tank is further arranged above the septic tank; the bottom of the sludge fermentation tank is provided with an inclined bottom wall and a fermentation tank inner spray head used for spraying sludge upwards, the sludge fermentation tank is internally provided with a division baffle used for limiting the sludge from flowing along a turn-back type flowing path, and a sludge flowing and settling channel is formed between the division baffle and the inclined bottom wall. According to the method, resource utilization of the excrement collection type wastewater sludge is realized, the treatment cost of the sludge is saved, the potential risk of the sludge to the environment is reduced, sludge reduction and resource utilization are realized, the number of equipment is reduced, the operation cost is low, the operation is simple, and the raw materials are cheap.

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 present invention discloses a device and method for treating excess sludge, comprising an excess sludge nitrogen-phosphorus separation unit, a nitrification unit, an anaerobic ammonium oxidation unit, and an advanced treatment unit; the excess sludge undergoes anaerobically phosphorus release in the excess sludge nitrogen-phosphorus separation unit, and the phosphorus in the supernatant is reused for farmland as phosphate fertilizer; the dephosphorized excess sludge undergoes sludge fermentation in the excess sludge nitrogen-phosphorus separation unit; the sludge fermentation product enters the nitrification unit and the anaerobic ammonium oxidation unit for decarbonization and nitrogen removal; and after further purification in the advanced treatment unit, the tail water is returned to the natural water system. The present invention has the distinct characteristics of being ecologically friendly, economically efficient, and can achieve sludge reduction, stabilization, harmlessness, and resource utilization. Nitrogen-phosphorus separation and agricultural use of phosphorus prior to sludge fermentation not only help to simultaneously address the current increasing phosphorus demand and excess sludge treatment volume, but also reduce the phosphorus load of subsequent treatment units, facilitating the long-term stable operation of the device, and having practical significance and engineering value.

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 present invention discloses a sludge fermentation liquid in-situ re-fermentation driven short-range denitrification device and method, the device includes a fermentation-coupled short-range denitrification reactor and a denitrification synchronous anaerobic ammonium oxidation reactor; the fermentation-coupled short-range denitrification reactor and the denitrification synchronous anaerobic ammonium oxidation reactor are connected through an intermediate water tank. The present invention adopts the above-mentioned sludge fermentation liquid in-situ re-fermentation driven short-range denitrification device and method, further hydrolyzes and acidifies the organic matter in the sludge fermentation liquid to improve the utilization value of the fermentation liquid, realizes the full utilization of the residual sludge carbon source, and simultaneously treats nitrate wastewater and urban sewage through two-stage short-range denitrification / anaerobic ammonium oxidation, which is suitable for deep denitrification and resource utilization of sewage, and is of great significance to the realization of sustainable sewage treatment.

The invention discloses a high-efficiency low-consumption high-load carbon capture and phosphorus removal device and method by a contact stabilization method, the device comprises a sewage pool, an SBR (sequencing batch reactor) communicated with the sewage pool, a denitrification reaction pool communicated with a water outlet pipe in the middle of the SBR, an anaerobic digester communicated with a sludge discharge pipe at the bottom of the SBR, and a charcoal desliming device arranged on one side of the anaerobic digester. The method comprises the following steps: S1, feeding water and stirring; s2, SBR (sequencing batch reactor) treatment; s3, sludge fermentation; and S4, recovering the magnetic biochar. The magnetic biochar is added into the high-load SBR reactor with stable contact, adsorption of organic carbon and phosphorus in sewage is synchronously promoted, the trapping effect of soluble organic matter is further improved, adsorption of organic carbon and phosphorus in sewage is promoted, and the stable and efficient carbon trapping and phosphorus removing effect is guaranteed.

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.

Disclosed are a method and device for realizing advanced nitrogen removal of mature landfill leachate and sludge reduction by using sludge fermentation products as carbon source, belonging to the field of biological treatment of sludge of high ammonia nitrogen wastewater. The mature landfill leachate first enters a PNA-SBR, the reactor operates in an anoxic / anaerobic / oxic (A / A / O) mode, denitrification is performed at an anoxic state; then anaerobic ammonia oxidation is performed at an anaerobic stage to remove part of ammonia nitrogen and nitrite nitrogen; partial nitrification is performed at an oxic stage to remove the ammonia nitrogen; discharged water is pumped into a DN-SBR, meanwhile, an excess sludge fermentation mixture is added, the reactor operates in an anoxic / anaerobic / oxic (A / A / O) mode, organic matters in the sludge fermentation mixture are used for denitrification at an anoxic stage, and meanwhile, microorganisms store an inner carbon source; ammonia nitrogen brought by the fermentation mixture is removed at an anaerobic stage; and denitrification is performed through the inner carbon source at an oxic stage. The remarkable sludge reduction effect is achieved while a removal rate of TN achieves 96.0%, and the method and the device are suitable for advanced removal of the high ammonia nitrogen wastewater.

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.