405 results about "Nitrifying bacteria" patented technology

The invention relates to the technical field of water treatment, in particular to a denitrification slow-release composite carbon source as well as a preparation method and application thereof. Comprising the following components in percentage by weight: 2-10% of hydroxy acrylic acid, 2-10% of saccharides, 5-15% of straw waste liquid, 5-15% of kitchen waste liquid, 2-10% of saccharides, 3-15% of porous volcanic ash, 5-15% of polyvinyl alcohol, 0.2-1% of inorganic salt, 1-2% of polypeptide, 0.5-1% of growth factors, 0.2-1.5% of MFC agar, 0.1-0.5% of cellulase, 0.1-0.5% of protease, 0.1-0.5% of denitrifying bacteria and the balance of water. The sum of the percentages of the raw materials is 100%. The invention has the advantages that: each nutrient component is balanced, the nutrition is comprehensive, the activity of denitrifying bacteria is improved, the number of species and community layers of a biological system of a sewage treatment plant are increased, the growth of various microorganisms is facilitated, nutrient substances can be fully utilized, and the denitrification effect is far higher than that of related carbon sources such as single methanol, glucose and the like.

The invention discloses a composite denitrification accelerant and a preparation method thereof, and belongs to the technical field of sewage treatment. The carbon source composite material is prepared from the following raw materials in parts by weight: 30-50% of a carbon source, 2-5% of vitamins, 2-5% of amino acids, 1-3% of a biological stimulant, 1-2% of signal molecules, 1-5% of metal elements, 3-5% of a pH regulator and 25-60% of water. Through metabolites such as vitamins, amino acids and biological stimulants, growth and reproduction of denitrifying bacteria are promoted, and functions of related enzymes in the denitrification process are improved. The signal molecule optimizes the metabolic activity of bacteria by regulating and controlling the expression of genes, related to the denitrification process, of the denitrifying bacteria. The metal ions can enhance the activity of the denitrifying enzyme, so that the efficiency of denitrification treatment is improved. According to the denitrification accelerant, the denitrification process is promoted through the synergistic effect of three aspects of growth and reproduction of denitrifying bacteria, expression of denitrification genes and improvement of activity of denitrification-related enzymes.

A method of production of granular soil conditioner based on a mixture of biochar and organic fertilizer comprising the following steps:Biochar mixing with animal excrements in a ratio of 1 part of biochar to 0.1 to 0.4 parts of the excrement dry matter, adding to the base of a mixture of soil bacteria belonging to at least two genera of the following: bacteria of the Rhizobia genus, nitrifying bacteria of the Azospirillum or Azotobacter genus, bacteria of the Pseudomonas genus, and bacteria of the Bacillus genus,topping the bacteria-endowed base with water in the weight not more than double the weight of the bacteria-endowed base and letting the mixture ferment for at least 5 days,draining off the excess water and drying the bacterial base so that the water content does not exceed 20% by weight,adding a mixture of spores of fungi containing at least two of the group including Trichoderma, Arbuscular mycorrhizal fungi, Ectomycorrhizal fungi to the base-bacteria compound in a total quantity corresponding to 0.2 to 1% of the dry matter weight of the base-bacteria compound.

The invention discloses a device and a method for realizing low-carbon-nitrogen-ratio sewage autotrophic and heterotrophic coupled deep nitrogen and phosphorus removal based on a continuous flow membrane aeration bio-membrane reactor. A hollow fiber membrane is arranged in the continuous flow reactor, and an oxygen concentration gradient is formed through a bubble-free membrane aeration technology. In the biomembrane area, spatial partitions of functional bacteria such as nitrifying bacteria and anaerobic ammonium oxidation bacteria are established, and the two anoxic areas realize efficient nitrogen removal through short-cut denitrification coupling anaerobic ammonium oxidation (PD / A) and synchronous nitrification and denitrification. In the aspect of phosphorus removal, the system adopts an anaerobic-aerobic operation mode, phosphorus-accumulating bacteria release phosphorus anaerobically and absorb excessive phosphorus aerobically, and finally, phosphorus removal is realized through residual sludge discharge. The system integrates an internal carbon source extraction process, recovers a sludge carbon source and supplements an electron donor required by denitrification, and reduces the operation cost and carbon emission. The continuous flow MABR denitrification system enhances the denitrification efficiency of the PD / A system, is suitable for large-scale operation, and efficiently and stably realizes deep denitrification of a low-carbon-nitrogen-ratio urban sewage treatment plant.

The invention discloses a process for treating rural domestic sewage by using an improved A2 / O + MBBR (Moving Bed Biofilm Reactor), and relates to the technical field of sewage treatment. The method comprises the steps of S1, initial-stage treatment, S2, reflux treatment and S3, tail-stage treatment. The rural domestic sewage is treated by an improved A2 / O + MBBR nitrogen and phosphorus removal process, and the rural domestic sewage is distributed into each tank by adopting a sectional water inlet technology, so that an alternate multi-stage facultative / aerobic environment is formed, and the biological nitrogen and phosphorus removal effect is enhanced; the improved A2 / O + MBBR process has the advantages of high nitrogen and phosphorus removal effect, low investment and operation cost, convenience in operation and management and the like; all returned sludge enters the pre-denitration tank and enters the front-section anaerobic tank and the front-section anoxic tank, a sludge concentration gradient from high to low is formed in each tank, and the average sludge concentration in each tank is increased and the hydraulic load of the sedimentation tank is not changed under the condition that the effluent sludge concentration is not increased, so that the proliferation speed of phosphorus-accumulating bacteria and nitrifying bacteria is accelerated; the proportion in the total amount of the activated sludge is increased, so that the nitrogen and phosphorus removal effect is improved.

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 invention discloses a method for enhancing nitrogen and phosphorus removal effects of a whole-course autotrophic nitrogen removal system, and belongs to the technical field of sewage treatment. According to the method, the steel slag powder and the steel slag particles are applied to a nitrification section and a sulfur autotrophic denitrification section respectively, alkalinity consumed by nitrification is supplemented by adding the steel slag powder in the nitrification section, enrichment of nitrifying bacteria is facilitated, metal ions leached from the steel slag powder improve the ammonia nitrogen removal rate, meanwhile, part of phosphate is removed, and the ammonia nitrogen removal rate is increased. The average removal rate of ammonia nitrogen is 99.75%, and the average removal rate of phosphate is 23.22%. According to the invention, the denitrification potential and denitrification effect of the sulfur autotrophic denitrification section are improved, and when the HRT is 3h, the average 97.04% of total nitrogen and the average 86.4% of total phosphorus can be removed; in the denitrification process, metal ions leached from the steel slag can generate precipitates with phosphate, and H < + > generated in the denitrification process can accelerate erosion of the steel slag, so that the phosphorus removal capacity of the steel slag is improved.

The present invention discloses an application of a salt-tolerant heterotrophic nitrification-aerobic denitrifying bacteria in wastewater treatment and plant growth promotion. The present invention provides an application of Glutamicibacter nicotianae XH-220 or a bacterial agent containing the Glutamicibacter nicotianae XH-220 in nitrogen-containing wastewater and cucumber seedling growth promotion treatment; the Glutamicibacter nicotianae XH-220 is numbered ACCC 62208 in the Agricultural Microbiology Center of the China Microbiological Culture Collection Administration. The strain has acid resistance, salt resistance and heavy metal resistance, and also has a plant growth promotion effect. The present invention has important application prospects in the fields of sewage treatment and plant growth promotion.

The invention discloses a soil improvement regulator, which is prepared from the following raw materials in parts by weight: 10 to 50 parts of secondary aluminum ash residue subjected to innocent treatment, 5 to 10 parts of tea bran, 1 to 2 parts of complex microbial inoculants, 2 to 6 parts of magnetized seaweed mud, 10 to 20 parts of charcoal, 5 to 10 parts of bagasse and 5 to 10 parts of hydrolyzed amino acid, the complex microbial inoculants comprise bacillus subtilis, nitrogen-fixing bacteria, photosynthetic bacteria, nitrifying bacteria and selenium-enriched strains. According to the soil improvement conditioning agent, high nutrient elements in the secondary aluminum ash residues are reserved, harmful elements are removed, the magnetized seaweed mud and the complex microbial inoculants are added, through the synergistic effect of the multiple elements, the soil improvement conditioning agent has the good soil improvement effect, and reutilization of the secondary aluminum ash residues is achieved. The invention further discloses a preparation method of the soil improvement regulator.

The invention discloses a composite activated carbon filter material and a preparation process thereof, and belongs to the technical field of water treatment materials. The filter material sequentially comprises a modified coconut shell activated carbon matrix, a bimetallic oxide and a biodegradable functional film from inside to outside, the modified coconut shell activated carbon matrix is prepared by a three-step process of acid leaching modification, microwave activation and nitrogen doping; the bimetallic oxide is Fe-Mn oxide nano particles; the biodegradable functional film is composed of a polyvinyl alcohol / polylactic acid blended film and a complex microbial inoculant, and the complex microbial inoculant comprises a mixed flora of pseudomonas, bacillus and nitrifying bacteria. Through the three-layer composite structure of the coconut shell activated carbon matrix, the bimetallic catalyst layer and the biodegradable film, the synergistic effect of physical adsorption, chemical catalysis and biodegradation is achieved. Through step-by-step superposition of the functional layers, the removal efficiency of complex pollutants such as organic matters, heavy metals, ammonia nitrogen and the like is remarkably improved.

The invention provides an efficient composite sludge reduction biological agent which comprises bacillus coagulans, bacillus altitudinis, bacillus pumilus cellulase and efficient composite COD / NH3-N bacteria, the efficient composite COD / NH3-N bacteria comprise amylolytic bacteria, proteolytic bacteria, plant lactic acid bacteria and nitrifying bacteria, the preservation number of the bacillus coagulans is CGMCC NO.31765, and the preservation number of the bacillus altitudinis is CGMCC NO.31765. The preservation number of the bacillus altitudinis is CGMCC (China General Microbiological Culture Collection Center) NO.29011, and the preservation number of the bacillus pumilus is CGMCC NO.29013. The efficient composite sludge reduction biological agent is directly added into an aeration tank (aerobic tank) in a sludge treatment process, sludge (MLVSS) generated by a system is reduced in the digestion process of organic matters in a biochemical tank, the discharge of residual sludge is reduced, and the sludge age is prolonged.

The invention relates to the technical field of denitrification fillers, in particular to an autotrophic denitrification filler for denitrification and a preparation method thereof. The autotrophic denitrification filler comprises the following raw materials in parts by weight: 80-100 parts of sulfur powder, 8-12 parts of zinc carbonate powder, 8-12 parts of clay, 4-6 parts of ferric oxide, 4-6 parts of polyhydroxyalkanoate, 4-6 parts of sugarcane cellulose, 1-3 parts of cotton, 1-3 parts of a binder and 1-3 parts of a cross-linking agent. According to the method, in the high-frequency ultrasonic treatment, the sulfur powder and sodium sulfide are in non-uniform contact, so that non-uniform sunken dissolving positions can be generated on the surface of the sulfur powder, the specific surface area of the sulfur powder is effectively increased, and after the sulfur powder is used as a main raw material to prepare the filler, the filler has a relatively large contact reaction area with sewage; a good attachment and growth environment is provided for denitrifying bacteria, and the purification effect of the autotrophic denitrification filler for denitrification is improved.

The present invention proposes a MABR membrane assembly, a MABR reactor, a MABR reactor operation method and a MABR biofilm optimization control method, which adopts a cross-flow working mode between horizontal membrane filaments and water flow to improve the mass transfer efficiency of the matrix and metabolites in the MABR biofilm; the composite structure membrane assembly is used to promote the complementarity and symbiosis of various microorganisms such as carbon removal aerobic bacteria, nitrifying bacteria, denitrifying bacteria and anaerobic ammonia oxidizing bacteria; different areas such as MABR membrane reaction area, pre-reaction area and water distribution and gas distribution area are constructed in the same reactor to complete short-range nitrification or partial short-range nitrification reaction, short-range denitrification reaction and anaerobic ammonia oxidation reaction respectively, so as to achieve efficient biological denitrification of sewage with low carbon-nitrogen ratio in a single-stage MABR reactor. At the same time, the optimization control method of the MABR biofilm solves the problems that the overly thick biofilm in the MABR reactor is not easy to be effectively washed, and the fixed gas washing frequency and intensity are difficult to simultaneously adapt to the biofilm washing and film removal requirements of membrane filaments in different parts.

The invention relates to a soil conditioner based on nitrification inhibition and a soil acid control method, and belongs to the technical field of soil conditioning, the soil conditioner comprises the following components by weight: 20-22 parts of humic acid, 32-36 parts of syringic acid-linoleic acid modified porous hydroxyapatite, 4-5 parts of complete nitrifying bacteria, 2-5 parts of syringic acid, and 2.8-4.2 parts of sodium carboxymethyl cellulose. According to the technical scheme, syringic acid and linoleic acid serve as nitrification inhibitors, the nitrification inhibition rate can be effectively increased, ecological niches of ammonia-oxidizing archaea and ammonia-oxidizing bacteria can be reduced through competitive occupation due to addition of complete nitrifying bacteria, the nitrification rate of the ammonia-oxidizing archaea and the ammonia-oxidizing bacteria is inhibited, and N2O emission is reduced. Humic acid and hydroxyapatite can be used as pH buffer substances to regulate and control soil acidity, aluminum toxicity can be relieved, and physical and chemical properties of soil can be improved; meanwhile, the complete nitrifying bacteria can be ensured to have relatively high activity under the condition that the pH is 5.5-6.5.

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 discloses a method for improving biochemical treatment performance of activated sludge, an in-situ expansion device of a sewage treatment system and the sewage treatment system. The method for improving the biochemical treatment performance of the activated sludge comprises the following steps: inputting the activated sludge into a first separation cavity of a first-stage separation unit so as to separate organic matters and inorganic matters in the activated sludge through spiral movement of the activated sludge in the first separation cavity, the concentration of inorganic matters in the activated sludge discharged from the first overflow port of the first-stage separation unit is reduced, and the concentration of organic matters is improved; and inputting the activated sludge discharged from the first overflow port into a second separation cavity of the second-stage separation unit, so as to recover the activated sludge enriched with nitrifying bacteria from a second underflow port of the second-stage separation unit through the spiral motion of the activated sludge in the second separation cavity. The method has good effects of removing inorganic particles in the activated sludge and recycling and enriching nitrifying bacteria, the treatment load of a sewage treatment system can be effectively improved, and in-situ synergy and capacity expansion of the sewage treatment system are achieved.

The invention discloses an enzyme source particle carrier and a preparation method and application thereof, and relates to the technical field of microbial carriers, the enzyme source particle carrier comprises denitrification inner layer particles, a nitride, activated carbon, water, a polyurethane prepolymer, an initiator and a catalyst; the denitrification inner layer particles comprise the following components: a denitrifying substance, activated carbon, a polyurethane prepolymer, an initiator and a catalyst. The enzyme source particle carrier provided by the invention enriches denitrifying bacteria and nitrifying bacteria at the same time, and adopts activated carbon to increase bacterial attachment sites in the particle carrier, so that the enzyme source particle carrier has better biological activity, mechanical strength and service life, and can better adapt to impact of complex water bodies, water quality and water quantity; and the nitrifying bacteria and the denitrifying bacteria are reasonably distributed in the enzyme source particle carrier, so that synchronous nitrification and denitrification are easily realized, and an efficient, energy-saving and carbon-source-saving denitrification process is achieved.

The present invention provides an autotrophic denitrification filter material, comprising three types of materials A, B, and C, and the weight ratio of each material is A: B: C = (10-15): (1-2): 1, wherein A is a composite denitrification ingredient, including ferrous sulfide, sulfur, sodium thiosulfate and iron powder; B is an adhesive; and C is a molecular sieve treated with a microbial culture solution. The high efficiency of the autotrophic denitrification filter material with high efficiency denitrification provided by the present invention is mainly based on the following two options: first, the filter material belongs to a multivalent composite sulfide-iron coupling denitrification scheme, and the diverse electron donors of the autotrophic denitrifying bacteria have synergistic synergy; second, the autotrophic denitrifying bacteria culture solution is pre-placed in the gap of the molecular sieve, which can be slowly released, ensuring that the autotrophic denitrifying bacteria can still maintain growth when the environment is subjected to various shocks. The autotrophic denitrification filter material provided by the present invention has a simple preparation process, is easy to operate during application, and can maintain high efficiency in denitrification capacity.

The invention relates to the field of sewage treatment, and discloses a sewage treatment method based on desulfurization and denitrification, which comprises the following steps: S1, magnetic flocculation-electro-catalysis pretreatment: adding a polyaluminum chloride-magnetic powder composite flocculant into sewage through a magnetic flocculation reactor to form a magnetic floc, removing suspended matters through a permanent magnetic separation device, and then entering an electro-catalysis oxidation pond, carrying out electrolysis by taking titanium-based lead dioxide as an anode and active carbon fiber as a cathode; and S2, performing synchronous desulfurization and denitrification on the three-dimensional electrode fluidized bed, feeding pretreated effluent into a three-dimensional electrode fluidized bed reactor, filling activated carbon particles as a third electrode, and adding a composite flora of thiobacillus and denitrifying bacteria. The efficient removal of sulfides, total nitrogen, total phosphorus and chemical oxygen demand in the sewage is realized through a multi-stage synergistic process of magnetic flocculation-electrocatalysis pretreatment, synchronous desulfurization and denitrification of a three-dimensional electrode fluidized bed, deep denitrification and dephosphorization of a denitrification filter tank and catalytic ozonation-membrane separation combined deep treatment.

The present invention discloses an on-line wastewater toxicity detection system and method based on nitrifying bacteria biofilm. The present invention uses nitrifying bacteria as a model organism, ensures the concentration of the bacterial community through the biofilm, and at the same time avoids the interference of miscellaneous bacteria through ultraviolet sterilization; by flushing the nutrient solution in the intermittent stage, the biological activity of nitrifying bacteria is protected, providing a highly sensitive and highly stable method and equipment for wastewater toxicity detection. By detecting the concentration of dissolved oxygen in the solutions flowing into and out of the nitrifying bacteria biofilm reactor, the toxicity of wastewater can be evaluated quickly and with high stability. When the wastewater flows through the biofilm reactor, its toxicity can be evaluated in real time through the rate of dissolved oxygen consumption by the nitrifying bacteria biofilm.

The invention discloses an intelligently adjustable micro-ecological base reaction bed, which belongs to the technical field of water treatment, and comprises an ecological base reaction bed, a real-time detection module, a control module, an intelligent aeration module and a fungicide release module, the ecological base reaction bed comprises a reaction bed frame, an MOBR film is attached to the surface of the reaction bed frame, and the reaction bed frame is used for synchronously realizing half-process denitrification and anaerobic ammonia oxidation reaction; the real-time detection module is fixed on the reaction bed frame and is used for monitoring data in the reaction bed and feeding back the data to the control module; the control module is used for realizing remote control, automatic adjustment, fault early warning and dynamic optimization based on real-time detection data; the intelligent aeration module is a nano aeration device and is used for accurately adjusting the aeration rate according to an instruction of the control module, so that the concentration of dissolved oxygen is maintained at 0.2-0.5 mg / L; and the microbial agent release module comprises a plurality of microbial agent slow-release adding devices, is mounted near the intelligent aeration module on the lower layer of the reaction bed frame, and is used for dynamically adding nitrifying bacteria or denitrifying microbial agents according to instructions of the control module.

The invention belongs to the technical field of biological filters, and relates to an anaerobic denitrification reactor and a method for accelerating degradation of nitrate nitrogen in micro-polluted water, and the reactor mainly comprises a biological filter, a water inlet tank, a peristaltic pump and a water outlet tank. The biological filter is composed of a filler composed of a modified polyvinylidene fluoride hollow fiber membrane and a high-temperature treatment iron wire, and the wastewater treatment process of the biological filter comprises a biofilm culturing stage and a domestication stage. In the biofilm culturing stage, the activated sludge enters the biofilter along with inlet water, and is loaded on the surface of membrane filaments to form a layer of biofilm; in the domestication stage, the wastewater slowly enters a biological filter and stays in a reactor, iron and nitrate nitrogen in the wastewater are subjected to denitrification reaction under the action of denitrifying bacteria, and the purpose of rapidly removing the nitrate nitrogen is achieved. According to the method, nitrate nitrogen in the wastewater can be rapidly reduced under the condition of not additionally adding a carbon source, so that the treatment process is low-carbon, aeration is not needed, energy is saved, and the method is suitable for industrial popularization.

The invention discloses a heterotrophic-aerobic denitrifying bacterium C-3 and application thereof, the heterotrophic-aerobic denitrifying bacterium C-3 is preserved in the China General Microbiological Culture Collection Center (CGMCC), is classified and named as brevundimonas, has the preservation number of CGMCC No.31729, and is preserved on August 23, 2024. The heterotrophic-aerobic denitrifying bacterium C-3 has the advantages that the preservation number is CGMCC No.31729, and the preservation date is 2024. The heterotrophic-aerobic denitrifying brevundimonas vesicularis C-3 (Brevundimonas vesicularis C-3) provided by the invention takes sodium acetate as a carbon source, and under the aerobic conditions that the C / N mass ratio is 10, the pH value is 7, the temperature is 30 DEG C and the rotating speed is 200r / min, a relatively good nitrate nitrogen removal effect is achieved, and the removal effect is 100%; in actual aquaculture tail water, nitrate nitrogen, nitrite nitrogen, ammonia nitrogen and total nitrogen can be well removed; meanwhile, the strain has high safety and has good application value in treatment of aquaculture tail water.

The invention relates to the technical field of sewage treatment. The invention discloses an anaerobic ammonium oxidation bacteria, short-cut nitrifying bacteria and microalgae coupling system and a domestication method thereof, which are characterized in that three autotrophic microorganisms with different oxygen requirements are sequentially domesticated by a biological filler according to a sequence of an inner layer, a middle layer and an outer layer to form dissolved oxygen gradient region change. Wherein the microalgae form an oxygen production area in the outer photosynthesis, and the dissolved oxygen concentration in the area is the highest. Short-cut nitrifying bacteria domesticated on the middle-layer biological filler consume oxygen, and the concentration of dissolved oxygen is lower than that of dissolved oxygen in the outer-layer biological filler area. The dissolved oxygen in the inner-layer biological filler area can reach the lowest level, so that the anaerobic ammonium oxidation bacteria can survive suitably, and the stable denitrification of anaerobic ammonium oxidation is ensured. Therefore, the biological membrane obtained by the domestication method provided by the invention is more stable, the mass transfer of the dissolved oxygen is more uniform than that of the traditional mechanical point source aeration, and the influence of the dissolved oxygen on the interior is smaller, so that the treatment effect is more stable. The anaerobic ammonium oxidation bacteria, short-cut nitrifying bacteria and microalgae coupling system does not need aeration, does not need additional organic carbon sources, can absorb CO2 to realize negative emission, is energy-saving and efficient, meets the requirements of dual carbon and green water plant transformation in China, and has important utilization value.

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 relates to the technical field of sewage treatment, and provides a high-concentration ammonia nitrogen rural domestic sewage treatment system, which comprises an adjusting tank, a sewage basic treatment device, a sewage enhanced treatment device, an aeration device and a bacteria inactivation device, the sewage basic treatment device comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank which are sequentially communicated, a first sludge return pipe is communicated between the anaerobic tank and the sedimentation tank, and a second sludge return pipe is communicated between the aerobic tank and the anoxic tank; the sewage enhanced treatment equipment is communicated between the sewage basic treatment equipment and the adjusting tank, the sewage enhanced treatment equipment comprises a biochemical tank, and an aerobic tank and an anoxic tank which are arranged in the biochemical tank, and the aerobic tank and the anoxic tank are communicated with each other; the aeration equipment is used for aerating the anoxic tank, the aerobic tank, the anoxic tank and the aerobic tank; the bacteria inactivation equipment is used for inactivating nitrifying bacteria in the second sludge return pipe. According to the invention, ammonia nitrogen in sewage can be efficiently removed, and the denitrification efficiency is improved.

The invention relates to the technical field of soil carbon improvement, and discloses a composite biological stimulant for tropical rainforest soil carbon improvement and a preparation method and application thereof, the composite biological stimulant is obtained by mixing a microbial preparation, an immobilized carrier, porous biochar, an inorganic mineral compound, a slow release fertilizer, a soil conditioner and a plant symbiotic inoculant; the microbial preparation comprises one or more of lactic acid bacteria, nitrifying bacteria, phosphate solubilizing bacteria, nitrogen-fixing bacteria and arbuscular mycorrhizal fungi; the inorganic mineral compound comprises feldspar, apatite and montmorillonite; the slow-release fertilizer comprises biochar, humic acid and phosphate; the soil conditioner comprises biological colloid prepared from seaweed extract and natural plant fiber prepared from straw and palm fiber; the plant symbiotic inoculant comprises rhizobium and / or endophyte. According to the composite biological stimulant, the soil carbon fixing capacity of the tropical rainforest is remarkably improved, the soil void structure is improved, and the plant growth capacity is enhanced.

The invention discloses a water quality conditioning agent based on plant extracts and a preparation method of the water quality conditioning agent, and belongs to the technical field of aquaculture. The water quality conditioning agent is prepared from the following raw materials in parts by weight: 14 to 18 parts of fructus schisandrae chinensis extract, 4 to 5 parts of fructus mume extract, 10 to 13 parts of rhizoma coptidis extract, 8 to 10 parts of glucosamine, 5 to 8 parts of chitosan, 3 to 6 parts of nitrifying bacteria, 2 to 4 parts of thiobacillus thiooxidans and 3 to 6 parts of zeolite powder. Through a four-dimensional synergistic mechanism of'plant active ingredient-chitosan slow release-microbial immobilization-zeolite adsorption ', the pH value, ammonia nitrogen, nitrite, hydrogen sulfide and bottom mud COD in tail water can be reduced and the dissolved oxygen amount can be increased under the condition of one-time addition, which indicates that the water quality regulator has a good effect of improving water quality.

A fast biofilm-forming electrospinning carrier, and its preparation method and application. The present invention belongs to the field of sewage biological treatment. The purpose of the present invention is to solve the technical problem that the existing methods cannot achieve the sustained release of AHLs by directly adding AHLs or simply fixing AHLs on the carrier surface. The method of the present invention: S1: dissolving a polymer and AHLs in an organic solvent to obtain a mixed solution; S2: electrospinning the mixed solution to obtain an electrospinning carrier with fast biofilm formation. In the obtained electrospinning carrier, AHLs are wrapped or attached to fibers. The present invention can accelerate the formation of biofilms on the carrier surface, promote the enrichment of nitrifying bacteria, and enhance the degradation of nitrogen-containing pollutants in water. Compared with traditional biofilm carriers, the present invention can shorten the biofilm formation and acclimation cycle, so that the sewage treatment unit used can meet the relevant effluent standards earlier.

The invention provides a sulfur-mediated anaerobic-anoxic-aerobic coking wastewater treatment method and system.The method comprises the steps that after specific strains are inoculated into an anaerobic reactor, an anoxic reactor and an aerobic reactor which are sequentially communicated, coking wastewater to be treated sequentially passes through the anaerobic reactor, the anoxic reactor and the aerobic reactor; and settling through a settling pond to realize wastewater treatment. In the process, the coking wastewater to be treated sequentially passes through the anaerobic reactor inoculated with the sulfate reducing bacteria, the anoxic reactor inoculated with the sulfur autotrophic denitrifying bacteria and the aerobic reactor inoculated with the nitrifying bacteria, and sulfur circulation is embedded in the coking wastewater treatment process, so that various pollutants in the coking wastewater are effectively removed.