271 results about "Denitrifying bacteria" patented technology

The present application relates to the field of municipal wastewater treatment, and particularly relates to a highway service area wastewater treatment device and method based on AOOA-MBBR process. The device comprises a first anoxic tank, a first aerobic tank, a second aerobic tank and a second anoxic tank connected in sequence, and is filled with MBBR filler respectively, and the volume of the filled MBBR filler is taken as the effective volume; the first aerobic tank and the second aerobic tank are respectively provided with an aeration device; the first anoxic tank is used for inoculating hydrolytic bacteria and denitrifying bacteria; the first aerobic tank is used for inoculating hydrolytic bacteria, nitrifying bacteria and denitrifying bacteria; the second aerobic tank is used for inoculating nitrifying bacteria, and the second anoxic tank is used for inoculating hydrolytic bacteria and denitrifying bacteria; the second aerobic tank is connected with the first anoxic tank through a reflux pipe, and the reflux pipe is provided with a reflux power assembly. The present application solves the problems of existing highway service wastewater treatment with extremely low carbon-nitrogen ratio, such as the need for additional carbon source / electron donor, high operation cost, poor denitrification effect and high sludge yield.

The application discloses a method for efficient denitrification and decarburization of kitchen waste and sludge co-fermentation anaerobic digestion effluent, which removes part of COD and ammonia nitrogen in the influent sludge by using a first SNAD, and maintains a certain amount of free ammonia of a certain concentration due to the high concentration of ammonia nitrogen and the high pH of the influent, so as to maintain the inhibition effect on nitrifying bacteria and ensure the conversion of part of the ammonia nitrogen into nitrite nitrogen, and the high activity of anaerobic ammonia oxidation bacteria is ensured in the first SNAD by limiting the aeration amount, so that the ammonia nitrogen and nitrite can be further removed; the effluent enters a nitrification tank, and the ammonia nitrogen is nitrified into nitrate nitrogen under the condition of nitrifying bacteria and sufficient aeration amount, and then enters a denitrification tank, and the denitrification process is carried out under the condition of heterotrophic denitrifying bacteria and sufficient carbon source, so that most of the nitrate nitrogen in the system is converted into nitrogen gas and removed, finally, the clear liquid is discharged after being filtered by an MBR membrane in a membrane tank, so as to achieve the purpose of efficient denitrification and decarburization of kitchen waste anaerobic digestion effluent.

The invention belongs to the technical field of sewage treatment, and particularly relates to a low-carbon-nitrogen-ratio sewage short-process nitrogen and phosphorus removal system and method. The method comprises the following steps: S1, capturing a carbon source and synthesizing an internal carbon source; s2, synchronous denitrification phosphorus removal; S3, layered nitrification treatment and internal carbon source reutilization; and S4, material circulation. According to the invention, denitrifying phosphorus-accumulating bacteria are used as an active carbon source carrier, and soluble VFAs which is easily fight for by common heterotrophic denitrifying bacteria is converted into solid PHA in the bacteria in a carbon source capture and internal carbon source synthesis tank; according to the method, the total nitrogen and the total phosphorus in the sewage with the low carbon-nitrogen ratio can be efficiently and deeply removed, and meanwhile, the method has the outstanding advantages of being low in energy consumption, small in sludge yield and small in occupied area.

The invention discloses a filler reinforced ecological floating bed for purifying aquaculture tail water and application thereof, and belongs to the technical field of water treatment. The filler reinforced ecological floating bed comprises canna cultivated in a floating plate and straw or straw biochar suspended below the floating plate; the straw biochar is obtained by taking straw as a raw material and pyrolyzing the straw at 500 DEG C or 700 DEG C. The ecological floating bed capable of purifying the aquaculture tail water is prepared by utilizing the emergent aquatic plant canna which has high purification efficiency on nitrogen and phosphorus and the straw or straw biochar which has a large surface area and is beneficial to the growth of denitrifying bacteria, and the ecological floating bed can effectively reduce the content of nitrogen and phosphorus in the aquaculture tail water, accelerate the denitrification and dephosphorization rate and improve the quality of the aquaculture tail water. The tail water purification method can be used for reducing nitrate accumulation, realizing tail water purification, providing scientific basis and technical support for tail water treatment work in aquaculture, and being beneficial to promoting green and sustainable development of aquaculture.

The invention discloses a method for realizing deep autotrophic nitrogen removal of sludge digestion liquid based on alternate intermittent aeration of a double-membrane aeration bio-membrane reactor (MABR). The process device comprises a sludge digestion liquid raw water tank, a single-stage double-MABR reactor, two MABR devices and a water outlet tank. According to the method, sludge digestion liquid enters the single-stage double-MABR reactor, the two MABR devices are alternately and intermittently aerated, the state of one aeration and one aeration stopping is always kept, and ammonia nitrogen in raw water is converted into nitrite through ammonia oxidizing bacteria enriched on the inner side of an MABR membrane. And simultaneously supplying to anaerobic ammonium oxidation bacteria enriched on the outer sides of the two MABR membranes through matrix diffusion for denitrification and generation of nitrate. Denitrifying bacteria enriched on the outer side of the MABR membrane utilize raw water organic matters to drive short-cut denitrification to synchronously supply nitrite to anaerobic ammonium oxidation bacteria so as to realize deep autotrophic nitrogen removal. According to the invention, a double-anaerobic ammonia oxidation reaction hot area is constructed through alternate intermittent aeration of double MABRs, and efficient deep autotrophic nitrogen removal of the sludge digestion liquid can be stably realized.

The invention provides a sewage enhanced nitrogen and phosphorus removal process based on microbial community interaction, and belongs to the field of sewage treatment. The method comprises the steps of sewage pretreatment, anaerobic phosphorus release, anoxic denitrification, aerobic nitrification phosphorus uptake and the like, an anaerobic-anoxic-aerobic three-section reactor is adopted, and proper ecological nichs are provided for phosphorus-accumulating bacteria, denitrifying bacteria and nitrifying bacteria by accurately regulating and controlling parameters such as dissolved oxygen, hydraulic retention time and carbon nitrogen ratio of each section, so that the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded, and the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded. The competition problem of biological nitrogen removal and biological phosphorus removal is effectively relieved, the nitrogen and phosphorus removal efficiency is remarkably improved, the total nitrogen removal rate reaches 85% or above, and the total phosphorus removal rate exceeds 90%; straw-based modified charcoal is adopted as a carrier, so that the loading capacity and activity of functional flora are improved, and flora interaction is enhanced; meanwhile, resource utilization of agricultural wastes is realized, and the method has remarkable environmental benefits and economic advantages.

The invention discloses a staged regulation and control sulfur cycle enhanced denitrification microbial community construction method, and belongs to the technical field of environmental biologication.The method comprises the three stages that in the first stage, low-carbon-nitrogen-ratio domestication culture is conducted, the carbon-nitrogen ratio is 1.5-2.5: 1, and domestication is conducted for 50-70 days; in the second stage, electron donor-acceptor ratio regulation culture is carried out, the / molar ratio is (4-6): 1, and culture is carried out for 15-25 days; in the third stage, pulse type sulfate is fed for enhanced culture, the single-time feeding concentration is 200-500 mg / L, culture is conducted for 8-15 days, real-time monitoring is conducted through the fluorescence in-situ hybridization technology, construction is completed when the abundance of sulfur autotrophic denitrifying bacteria reaches 28% or above, and when the microflora constructed through the method is used for treating low-carbon-nitrogen-ratio industrial wastewater, the sulfur conversion rate is 1.2-2.0 kg / (m.d), the system stability is good, and the application range is wide. And the impact load resistance is high.

The invention discloses a preparation method of a pesticide pollution remediation agent for groundwater of karst landforms, and relates to the technical field of groundwater pollution remediation. The method has the effect of enhancing pesticide degradation, pesticide pollutants can be efficiently degraded in a complex environment of karst underground water by compounding hard water-resistant fungi, dehalogenation bacteria and denitrifying bacteria, and a better remediation effect is achieved; the medicament can improve the stability and the adsorption capacity of the carrier, the bionic calcium phosphate nano carrier is adopted, the specific surface area is high, the adsorption capacity is excellent, the adsorption capacity on pollutants can be effectively enhanced, and the remediation effect is improved; the agent has an efficient repairing mechanism, the load capacity of the flora is enhanced through biological induction mineralization and physical adsorption enhancement of a bacterium-carrier complex, the release rate of the flora is controlled through an intelligent coating technology, and precise repairing is achieved.

The invention relates to a CdS / denitrifying bacteria hybrid system as well as a construction method and application thereof, and relates to the technical field of water nitrate pollution treatment. Comprising composite denitrifying bacteria, Zn-doped CdS heterojunction nanoparticles loaded on the surface of the composite denitrifying bacteria, and an electronic mediator anchored at the interface of the heterojunction nanoparticles and a flora, the composite denitrifying bacteria are prepared from Stutzeria balearica CXK-1 and Stutzeria balearica GUA-1 according to the volume ratio of the Stutzeria balearica CXK-1 to the Stutzeria balearica GUA-1 to the Stutzeria balearica GUA-1 to the Stutzeria balearica GUA-1 being 1 to (0.8 to 1.2). The hybrid system can utilize photoelectrons to drive microbial denitrification under an illumination condition, so that the reduction of nitrate radicals is realized, and the effect of water treatment is achieved.

The invention relates to the technical field of immobilized microorganisms and wastewater treatment, in particular to immobilized microorganism gel beads, a preparation method and application. The pellets are prepared by the preparation method. The preparation method comprises the following steps: S1, mixing a denitrifying bacteria suspension and a mixed gel solution, and adding diatomite to obtain a mixed bacteria solution; s2, dropwise adding the mixed bacterial liquid into a calcium salt solution, and carrying out a first cross-linking reaction to obtain immobilized microorganism balls; and S3, adding the pretreated immobilized microorganism balls into an aluminum sulfate aqueous solution, and carrying out a second cross-linking reaction to obtain the immobilized microorganism gel balls. The application refers to the application of the small ball in wastewater treatment or sewage treatment. According to the invention, the immobilized microbial gel beads with high mechanical strength and good stability can be prepared with low foam and low energy consumption.

This invention discloses a continuous-flow anaerobic bypass IFAS-AOA device and method for treating inert high-ammonia nitrogen wastewater, belonging to the field of biological treatment technology for high-ammonia nitrogen wastewater. The device consists of three parts: a raw water storage tank, a continuous-flow anaerobic bypass AOA reactor, and a sludge-water separation system. The effluent from the end of the anaerobic process enters the aerobic zone of the AOA reactor, while the anaerobic end-mixed liquor bypasses to the anoxic zone, mixes with the aerobic end-effluent, flows through the anoxic zone, and enters the sludge-water separation system. In the anaerobic zone, endogenous denitrifying bacteria store organic matter from the raw water as an intracellular carbon source and bypass to the anoxic zone. In the aerobic zone, short-cut nitrification coupled with anaerobic ammonia oxidation serves as the main nitrogen removal pathway. In the anoxic zone, anaerobic ammonia oxidation coupled with endogenous denitrification achieves deep nitrogen removal. The existence of anaerobic bypass allows some of the mixed liquor to bypass the aerobic zone and directly bypass to the anoxic zone, thus fully utilizing the carbon source in the raw water. This invention can achieve stable short-cut nitrification and effective retention of anaerobic ammonia oxidizing bacteria, showing broad application prospects.

This utility model discloses an oxygen denitrification treatment device for aquaculture water, including a treatment tank. The treatment tank is equipped with a filtration zone, an aerobic biological zone, an anoxic biological zone, and a degassing zone. The filtration zone is filled with quartz sand filter media. The aerobic biological zone contains biological packing material and has a jet aeration ring on its outer wall, which is connected to an ozone-oxygen mixture generator. The anoxic biological zone is filled with porous ceramsite packing material. The degassing zone has a guide plate inside. In this utility model, the aquaculture water can be filtered for suspended particulate matter through the quartz sand filter media. The jet aeration ring can introduce ozone-oxygen mixture gas, which, together with the honeycomb biological packing material, can complete ammonia nitrogen oxidation. The denitrifying bacteria on the surface of the porous ceramsite packing material can convert nitrates into nitrogen gas. Finally, the gas is separated by the guide plate, and the purified water can be discharged from the outlet. Thus, through the above structure, efficient denitrification, oxygenation, and purification of aquaculture water can be achieved, improving water quality treatment efficiency and stability.

The application discloses a biological electrochemical auxiliary sulfur conversion promoting sulfur-based denitrification and sulfate emission reduction method and belongs to the field of water treatment. ‑ Nitrogen-containing wastewater enters an elemental sulfur denitrification system, and NO3 0 is reduced to N2 by sulfur autotrophic denitrifying bacteria, and elemental sulfur (S 2‑ ) is converted into SO4 2‑ . Effluent enters a cathode chamber of an electrochemical auxiliary sulfate reduction system, and hydrogen autotrophic sulfate reducing bacteria utilize cathode hydrogen production to reduce SO4 ‑ to HS 2‑ , and meanwhile, alkalinity produced by cathode hydrogen production neutralizes acidity produced in the denitrification process in the elemental sulfur denitrification system. ‑ HS 2‑ / supernatant is returned to the elemental sulfur denitrification system to react with S 0 to generate polysulfide (S n 2‑ ), S n 2‑ , which is used as an efficient electron donor to participate in denitrification, thereby significantly improving denitrification efficiency. The application does not need to add an organic carbon source, sludge production is small, high-concentration nitrogen-containing wastewater is efficiently treated, and the content of sulfate in effluent is simultaneously reduced, thereby realizing sulfur resource recycling, and the application is an economic and environment-friendly autotrophic denitrification method.

This invention discloses a bioelectrochemical denitrification system using a slow-release carbon source as the anode fuel, belonging to the field of microbial fuel cell technology. It comprises an anode chamber, a cathode chamber, an anode, a cathode, wires, and a separating membrane between the anode and cathode chambers. Electrochemically active microorganisms grow on the anode in the anode chamber, and anaerobic fermentation bacteria are present in the solution. An electrolyte and hydrogel particles with slow-release carbon function are added to the anode chamber. Electrochemically active denitrifying bacteria grow on the cathode in the cathode chamber. The hydrogel-released carbon serves as the solid fuel at the anode, providing a continuous electron donor to the cathode. Simultaneously, the selective permeation membrane controls the transmembrane transport of small organic molecules to the cathode, providing a carbon source for the denitrifying bacteria. The combined supply of electrons and carbon enhances denitrification by the denitrifying microorganisms at the cathode. This system is suitable for enhanced denitrification of polluted water bodies with low C / N ratios.

The application provides a biological denitrification treatment method for low-carbon-nitrogen-ratio wastewater, and utilizes single-stage nitrification and denitrification to treat ammonia-nitrogen wastewater in a one-piece submerged biological filter (SBAF reactor). The method comprises the following steps: sludge inoculation, sludge biofilm formation, system starting, and stable operation. In the sludge inoculation, sludge meeting the microbial community distribution is selected. In the system starting process, the microbial community distribution in the sludge in the one-piece submerged biological filter (SBAF reactor) is used as the symbol of successful system starting. During the input of the high-concentration ammonia-nitrogen wastewater to be treated, the aerobic nitrifying bacteria and the anaerobic denitrifying bacteria can more stably meet the above microbial community distribution, the system has better stability, the stable operation time is longer, the sludge does not need to be replaced for restarting during the stable operation, the continuous operation time is longer, can reach at least 250 days or more, and the frequency of replacing the sludge for restarting is reduced.

The invention discloses an anaerobic denitrifying bacterial agent as well as a preparation method and application thereof, and belongs to the technical field of water environment treatment. The anaerobic denitrifying bacterium agent is prepared from the following components in parts by weight: 15 to 30 parts of sterile water, 15 to 60 parts of normal saline, 5 to 10 parts of micro-capsule embedded anaerobic denitrifying bacteria, 5 to 20 parts of a porous composite modified carrier, 10 to 30 parts of a carbon source, 4 to 7 parts of nutrient elements, 2.5 to 4 parts of a buffering agent and 1 to 5 parts of a stabilizer, the micro-capsule embedded anaerobic denitrifying bacteria are obtained by embedding anaerobic denitrifying bacteria with an alginic acid gel solution and a calcium chloride solution; the porous composite modified carrier is obtained by crosslinking modified nano iron oxide, modified nano titanium dioxide, a functional polymer solution and glutaraldehyde. The anaerobic denitrifying bacterial agent provided by the invention can effectively improve the efficiency of treating nitrogen pollution of a water body.

The present application relates to sewage treatment technical field, especially a kind of composite biological additive for high-nitrogen sewage advanced treatment.The present application obtains a high-quality fermentation liquor by using specific enzymolysis sequence enzymolysis agricultural derivative, wherein it contains more reducing sugar and organic small molecule acid, and COD equivalent is extremely high, is 2~5 times of the carbon source COD used by conventional sewage plant, and has excellent effect when used as biological carbon source for sewage treatment;Meanwhile, the fermentation liquor is compounded and adjusted with AOB bacterial agent to obtain composite biological additive, the composite biological additive can provide sufficient high-quality nutrient ingredients for denitrifying bacteria, and also inoculate AOB bacteria for sewage treatment system, so that AOB bacteria in the system gradually develop into main nitrosation bacteria group, and have excellent enhanced denitrification effect on high-nitrogen sewage, and have wide application prospect.

This application relates to the field of wastewater treatment, specifically disclosing a sulfur autotrophic denitrification process; including the following specific steps: S1: After adjusting the pH of calcium nitrate tetrahydrate solution and ammonium dihydrogen phosphate solution to alkaline, triethanolamine is added dropwise to the calcium nitrate solution, followed by the addition of ammonium dihydrogen phosphate solution to form a reaction solution. The pH of the reaction solution is maintained at alkaline, and the reaction is heated. After filtration, washing, and drying, hydroxyapatite powder is obtained. The hydroxyapatite powder is mixed with a foaming agent, foam stabilizer, and adhesive, pressed into shape, and sintered to obtain a porous ceramic carrier; S2: The porous ceramic carrier, ground inorganic energy material, and denitrifying bacteria are added to the wastewater to be treated, mixed, and subjected to aeration treatment. The inorganic energy material is replenished periodically to complete the process. The sulfur autotrophic denitrification process used in this application has high denitrification efficiency, and no replenishment of denitrifying bacteria is required during the process.

The invention belongs to the technical field of sewage treatment, and discloses a rapid denitrification device for micro-polluted river water, which comprises a denitrification mechanism, the denitrification mechanism comprises a denitrification tower, and an aerobic nitrification layer, an anoxic denitrification layer and an adsorption insurance layer are respectively arranged in the denitrification tower from top to bottom. The system has the following beneficial effects that river water enters the denitrification tower and sequentially flows through the aerobic nitrification layer, the anoxic denitrification layer and the adsorption insurance layer, the aerobic nitrification layer is aerated to supply oxygen, and nitrifying bacteria accelerate conversion of ammonia nitrogen into nitrate; denitrifying bacteria in the anoxic denitrification layer convert nitrate into nitrogen, and the two layers synergistically improve the efficiency; the adsorption insurance layer is stable in residual substance adsorption effect. The porous partition plate water permeable holes are smaller than the filler particle size, smooth circulation of water flow is guaranteed, and rapid and efficient denitrification is achieved.

This invention discloses a denitrification biological carrier, its preparation method, and its application. The raw materials for preparing the denitrification biological carrier include an iron agent, modified activated carbon, polycaprolactone, sodium dodecyl sulfate, and a hydrogel binder. The modified activated carbon is 3-chloro-2-hydroxypropyltrimethylammonium chloride-modified activated carbon. The iron agent not only removes dissolved oxygen from water but also reduces total nitrogen in wastewater. The modified activated carbon improves its adsorption affinity for nitrogen-containing compounds. Polycaprolactone serves as a slow-release carbon source for denitrification, exhibiting high carbon source utilization. Sodium dodecyl sulfate, through its foaming properties, together with the modified activated carbon, iron agent, and polycaprolactone, forms a high-mechanical-strength, rough, and porous biological carrier structure, providing excellent attachment conditions for heterotrophic denitrifying bacteria. Therefore, applying the denitrification biological carrier of this invention to wastewater treatment systems can achieve good nitrogen removal efficiency and economic benefits.

This invention discloses a heterotrophic-aerobic denitrifying bacterium C-3 and its applications. The heterotrophic-aerobic denitrifying bacterium C-3 is deposited at the China General Microbiological Culture Collection Center (CGMCC), classified as *Brevundimonas naejangsanensis*, with accession number CGMCC No. 31729, and deposited on August 23, 2024. The heterotrophic-aerobic denitrifying vesicular *Brevundimonas naejangsanensis* strain C-3 provided by this invention exhibits excellent nitrate nitrogen removal efficiency (100%) under aerobic conditions using sodium acetate as a carbon source, a C / N mass ratio of 10, a pH of 7, a temperature of 30℃, and a rotation speed of 200 r / min. In actual aquaculture wastewater, it demonstrates excellent removal effects on nitrate nitrogen, nitrite nitrogen, ammonia nitrogen, and total nitrogen. Furthermore, this strain exhibits high safety and has significant application value in treating aquaculture wastewater.

The invention relates to the technical field of sewage treatment, in particular to a water body biotoxicity early warning system based on self-sustaining of denitrifying microorganisms. The early warning system comprises an early warning device, an early warning filtering system located at the front end of the early warning device, a nitrate nitrogen monitor located at the rear end of the early warning device, a carbon source storage tank used for storing a carbon source and a nitrate nitrogen storage tank used for storing nitrate nitrogen. The nitrate nitrogen monitoring instrument is used for monitoring the change of the concentration of nitrate nitrogen, so that the toxicity detection and early warning of inlet water are realized. The water body biotoxicity early warning system is arranged based on denitrifying bacteria, through the biofilm filler, the early warning system is high in impact resistance and better in stability in the use process, and meanwhile, the system is more stable and reliable in the use process in cooperation with a corresponding filtering-backflushing system, a filler stirring and flushing system and a parallel system; and the device is convenient to use and maintain, is more suitable for actual production, and has wide application and popularization prospects.

The invention relates to the technical field of water treatment, in particular to a composite treating agent for municipal sewage and a preparation method thereof.The composite treating agent is prepared by selecting industrial solid waste boric sludge, fly ash and the like as raw materials, taking biomass raw material epoxidized soybean oil as a binder, taking biomass raw material starch and plant-based porous carbon as adsorbents, mixing the raw materials with sodium silicate and water for granulation, and preparing the composite treating agent. The baking-free composite treating agent integrating multiple functions of sulfur autotrophic denitrification nitrogen removal, phosphorus removal, heavy metal chelating, porous carbon adsorption and the like is prepared, and when the baking-free composite treating agent is applied to urban sewage treatment, synchronous low-carbon and high-efficiency removal of various pollutants such as nitrogen, phosphorus and heavy metal can be achieved; after being granulated and formed, the composite treatment agent can be used as a filler of a biological filter to support the growth of sulfur autotrophic denitrifying bacteria, and can also be directly added into a pretreatment unit or an advanced treatment unit of a sewage treatment system.

This invention relates to a composite ecological device for in-situ enhanced denitrification of low-temperature river water and its application. The composite ecological device for in-situ enhanced denitrification of low-temperature river water comprises, from top to bottom, an insulation layer, a nitrification layer, and a denitrification layer. The nitrification layer includes a biological blanket and composite biological packing material fixed on the biological blanket, with low-temperature resistant nitrifying bacteria inoculated on the biological blanket and composite biological packing material. The denitrification layer includes packing balls, which are doped with a slow-release carbon source and inoculated with low-temperature resistant denitrifying bacteria. This invention also provides an application of the composite ecological device for in-situ enhanced denitrification of low-temperature river water. This invention solves the problem of significantly reduced biological denitrification efficiency in traditional denitrification processes under low-temperature conditions, as well as the problems of poor connection between stratified treatments leading to retention of nitrification products, and insufficient alkalinity in the denitrification zone inhibiting denitrification. It also solves the problem of uncontrollable carbon source addition leading to secondary pollution.

The present application provides a sludge treatment process for synchronously recycling carbon source and phosphorus. The sludge treatment process of the present application comprises: adding sludge to be treated into a pretreatment tank to adjust the sludge to be treated to be acidic or alkaline, pretreating the sludge to be treated to obtain pretreated sludge, and then performing anaerobic fermentation. The sludge treatment process of the present application can simultaneously realize effective recycling and utilization of the carbon source and phosphorus in the sludge. The recycled anaerobic fermentation liquid can be used for carbon source required for denitrification and phosphorus removal in a biological tank. The use of the anaerobic fermentation liquid as carbon source can obviously improve the abundance of short-cut denitrifying bacteria and denitrifying bacteria in the biological tank, obviously reduce the abundance of filamentous bacteria, and increase the types of microorganisms. The biological carbon prepared from the sludge after fermentation can be used as landscape phosphorus fertilizer, and good economic benefits can be achieved. The sludge treatment process of the present application realizes zero solid waste discharge, and completely reduces the residual sludge, thereby solving the problems of high disposal cost and insufficient disposal capacity of residual sludge in a sewage plant.

The application discloses a kind of preparation methods of bacteria-algae symbiosis filler, specifically: to the reactor filled with filler, add active sludge dispersion liquid, under aeration condition, 7-10 days are operated, and simulate tail water is passed through during operation process;Then inoculate chlorella according to the volume ratio of active sludge dispersion liquid and chlorella dispersion liquid 1:5-50, 22-30 DEG C and under illumination, 14-20 days are operated, wherein, light dark ratio is: illumination 6-12h, dark 12-18h;Simulate sewage plant tail water is passed through during operation process;Get the filler that hangs bacteria-algae symbiosis biofilm.The bacteria-algae symbiosis film formed in the application, microalgae can promote the enrichment of denitrifying bacteria and organic matter metabolic functional bacteria, and bacteria can improve the photosynthesis performance and carbon fixation performance of microalgae through material exchange and information transmission, so that the bacteria-algae symbiotic system can efficiently purify N / P / organic matter in water body, while reducing greenhouse gas emissions.The application also discloses a filler combination structure based on the above bacteria-algae symbiotic filler.

The application relates to a low-temperature aerobic denitrifying Pseudomonas sp. H2-1 and application thereof, and belongs to the technical field of microorganisms. Pseudomonas The strain expands the resource library of aerobic denitrifying bacteria in a polar low-temperature environment, and provides theoretical support for revealing the aerobic denitrifying mechanism under cold conditions and optimizing the sewage treatment process in cold regions.

The present application relates to water pollution treatment technical field, disclose the present application discloses a kind of V filter tank for sewage treatment, including multiple filter tank main body, water inlet groove, biological filter layer, quartz sand filter material layer, supporting layer, filter plate and water outlet groove are sequentially arranged from top to bottom in each filter tank main body;Biological filter layer includes installation frame and multiple layers of sliding frames arranged in installation frame along horizontal direction, each layer of sliding frame is separated into multiple through slots by partition, biological filler is fixed in through slot, heating wire is arranged in the inside of partition, iron block is arranged on sliding frame, electromagnet and spring are correspondingly arranged on installation frame;When the temperature of water inlet is lower than the set threshold, heating wire is powered to heat, electromagnet is powered to make multiple layers of sliding frames staggered, and the water flow channel is changed from vertical straight path to zigzag path.The present application can quickly improve water temperature and prolong contact time under low temperature condition, guarantee the metabolic activity of denitrifying bacteria, and realize stable denitrification effect.

The invention discloses a method for treating aged landfill leachate by ozonation and short-cut denitrification-anaerobic ammonia oxidation, which comprises the following steps: treating the aged landfill leachate by an ozonation unit, and then treating the aged landfill leachate by a short-cut denitrification-anaerobic ammonia oxidation (PDA) biological treatment unit, so that the aged landfill leachate can be discharged after reaching the standard. The ozone oxidation unit is used for continuously and efficiently cracking macromolecular refractory organic matters such as humic acid in the aged leachate through ozone, so that the biodegradability is remarkably improved; and the nitrogen proportion is synchronously optimized to form an ideal PDA flora substrate. According to the PDA biological treatment unit, mixed sludge of anaerobic ammonia oxidation sludge and denitrifying bacteria sludge is inoculated in a UASB reactor, and after gradual domestication, short-cut denitrification activity in a PDA biological treatment system is remarkably higher than nitrite reduction activity, and continuous supply of nitrite is guaranteed; synergistic metabolism of anaerobic ammonium oxidation bacteria and denitrifying bacteria is achieved, and the problem of organic matter inhibition is solved. The process and the device provided by the invention provide a green and efficient innovative solution for degradation-resistant wastewater with high ammonia nitrogen and low carbon nitrogen ratio.

[Problem] To provide a denitrification filter material in which the form thereof is maintained without collapsing and which is digested only when fed on by denitrifying bacteria. [Solution] A denitrification filter material according to the present invention is configured from a biodegradable melt-kneaded resin composition containing (A) a water-insoluble and / or non-seawater-soluble biodegradable resin component and (B) a biomass polysaccharide polymer component. The component (A) is preferably an ester-bonded polymer, and is more preferably one or more selected from polybutylene succinate adipate, polyhydroxyalkanoate, and polycaprolactone. The component (B) preferably contains a biomass polysaccharide polymer component having a helical molecular structure. A water purification device comprises: a denitrification tank to which water being treated is supplied; the aforementioned denitrification filter material, which is accommodated in the denitrification tank and fixes aerobic denitrifying bacteria for reducing nitrate nitrogen in the water being treated; and an air supply mechanism that supplies air to the water being treated.