5091 results about "Ammoniacal nitrogen" patented technology

Disclosed are: a catalyst which can exhibit an excellent catalytic activity and excellent durability for a long period in the wet oxidation treatment of waste water; a wet oxidation treatment method for waste water using the catalyst; and a novel method for treating waste water containing a nitrogenated compound, in which a catalyst to be used has a lower catalytic cost, the waste water containing the nitrogenated compound can be treated at high purification performance, and the high purification performance can be maintained. The catalyst for use in the treatment of waste water comprises an oxide of at least one element selected from the group consisting of iron, titanium, silicon, aluminum, zirconium and cerium as a component (A) and at least one element selected from the group consisting of silver, gold, platinum, palladium, rhodium, ruthenium and iridium as a component (B), wherein at least 70 mass% of the component (B) is present in a region positioned within 1000 [mu]m from the outer surface of the component (A) (i.e., the oxide), the component (B) has an average particle diameter of 0.5 to 20 nm, and the solid acid content in the component (A) (i.e., the oxide) is 0.20 mmol / g or more. The waste water treatment method uses a catalyst (a pre-catalyst) which is placed on an upstream side of the direction of the flow of the waste water and can convert the nitrogenated compound contained in the waste water into ammoniacal nitrogen in the presence of an oxidizing agent at a temperature of not lower than 100 DEG C and lower than 370 DEG C under a pressure at which the waste water can remain in a liquid state and a downstream-side catalyst (a post-catalyst) which is placed downstream of the direction of the flow of the waste water and can treat the waste water containing ammoniacal nitrogen.

The invention discloses a salt-tolerant microbial agent and a preparation method thereof. The microbial agent contains staphylococcus cohnii FSND-C, arthrobacter creatinolyticus FDN-1, flavobacterium mizutaii FDN-2, paracoccus denitrificans DN-3 and methylobacterium phyllosphaerae SDN-3. The microbial agent can achieve removal of ammonia nitrogen, total nitrogen and CODcr in the same reactor, has a good wastewater treatment effect, and can achieve short-cut nitrification and denitrification or simultaneous nitrification and denitrification while removing COD. Staphylococcus cohnii FSND-C can utilize various carbon sources, has certain salt tolerance, can be applied to the high-salinity wastewater treatment process, simultaneously can secrete a substance under environmental stimulus to enhance the flocculability of sludge, and further widens the application range of the microbial agent.

The invention discloses a composite microorganism viable bacteria preparation, which contains pediococcus, yeast and bacillus with the total bacteria count of more than 1 billion per gram. The invention also discloses a method for preparing the composite microorganism viable bacteria preparation, which comprises the following steps: performing amplification liquid culture on various strains respectively according to a conventional method in the field; mixing the materials according to a required proportion; and performing solid fermentation, drying and pulverization to obtain the composite microorganism viable bacteria preparation. The invention also discloses application of the composite microorganism viable bacteria preparation in preparing an organic waste water purifying agent and an aquaculture water body purifying agent, a deodorizer, a degreasing agent or an agent for removing pipe blockages for the hygiene of a refuse tip, a public place, an agricultural product market or a kitchen, feed additives in poultry and animal husbandry or pet culture, and preparations for controlling agricultural microorganism diseases. The composite microorganism viable bacteria preparation can effectively decompose a large amount of putrescent organic matters, inhibit the growth of harmful microorganisms and eliminate peculiar smells, and has the characteristics of high ammonia nitrogen removal rate, no generation of residual sludge, effective deodorization, low cost and the like.

The invention belongs to the technical filed of agricultural microorganisms, particularly relating to separate and screen Pseudomonas stutzeri YZN-001 for degrading ammoniacal nitrogen, nitrate nitrogen and nitrous nitrogen in water body and application. The screened Pseudomonas stutzeri YZN-001 of the invention is preserved in China Center for Type Culture Collection (CCTCC), with the preservation number being CCTCC NO:M 209107. The strain can effectively degrade ammoniacal nitrogen, nitrate nitrogen and nitrous nitrogen in water body within the range of 20-37 DEG C, has no toxicity to chub, has good degradation function on ammoniacal nitrogen in water body at normal temperature, the microorganism of the invention is inoculated for 72 hours, the degrading ratios to ammoniacal nitrogen in domestic sewage and aquaculture wastewater are respectively up to 83.10% and 61.38%.

The invention relates to a device for ammonia nitrogen wastewater discharge reduction and ammonia nitrogen resource utilization and a method thereof, and belongs to the field of wastewater discharge reduction. The conventional steam blow-off method has high unit energy consumption (250-300 Kg steam / ton wastewater) in ammonia nitrogen wastewater treatment, thus resulting in very high ammonia nitrogen wastewater treatment cost. The inventive device comprises at least two stages of ammonia nitrogen stripping step and ammonia nitrogen reutilization step. The ammonia nitrogen wastewater to be treated is respectively fed into each stage of ammonia nitrogen stripping step, and the removal of ammonia nitrogen in wastewater is realized in ammonia nitrogen stripping tower and the resource utilization is realized in the ammonia nitrogen reutilization step. Except for the first stage of the ammonia nitrogen stripping tower requiring steam introduction, the steam required on other stages of ammonia nitrogen stripping tower is obtained by vaporization of a part of the tower bottom liquid in each tower by using the heat released via condensation of a part of steam in the upper stage tower and flash evaporation of the tower bottom liquid in the upper stage tower, so as to remarkably reduce steam consumption. The inventive device and method have the advantages of high ammonia nitrogen content wastewater treatment, low ammonia nitrogen content in wastewater after treatment, low steam consumption, and low treatment cost.

The invention discloses an advanced treatment system and method for high-concentration percolate in a comprehensive garbage disposal plant, belonging to the field of industrial waste water treatment. The system is formed by connecting a regulating tank, a coagulative precipitation tank, an upflow anaerobic sludge bed reaction tank, a primary anoxic and aerobic membrane bioreactor, advanced oxidation treatment equipment, a secondary anoxic and aerobic membrane bioreactor, nanofiltration membrane treatment equipment, an ozone contact tank and an active carbon filtering tower in sequence. According to the system, garbage percolate can be treated comprehensively, different pollutants in garbage percolate are treated in a classified way by combining physical, chemical and biological treatment,advanced treatment of garbage percolate is realized, and classified treatment for removing pollutants such as organic matters, heavy metals, ammonia, nitrogen and the like is performed, so that treated effluent strictly reaches the requirement of water pollution discharge degree limit in the Household Garbage Landfill Pollution Control Standard, the system runs stably for a long time, and treatment cost is lower than that of a secondary disc pipe reverse osmosis membrane process.

The invention discloses a novel compound microorganism living bacteria agent. The agent comprises probiotics such as pediococcus, saccharomyces, bacillus and the like, wherein the total bacterial quantity is above 107 colony-forming units (cfu) / gram. The invention further discloses a method for preparing the novel compound microorganism living bacteria agent and applications of the novel compound microorganism living bacteria agent in preparation of organic sewage purification additives, deodorization fly dispelling agents, degreasing agents, pipeline blockage removing agents, feed additives and microorganism disease prevention agents. The novel compound microorganism living bacteria agent has the comprehensive effects of high removal rates to ammonia nitrogen, total nitrogen and total phosphorus, small sludge residues, energy saving, environmental friendliness and the like and the characteristics of convenience in use, safety and quickness in function, no secondary pollution, benefits to ecological protection, low treatment cost, good comprehensive profit and the like.

The invention discloses a composite efficient microbial preparation for treating difficultly-degradable waste water. The composite efficient microbial preparation comprises the following active ingredients of: bacillus, pseudomonas, alcaligenes eutrophus, aspergillus and yeast. The composite efficient microbial preparation has a unique treating effect on high-concentration organic sewage and highammonia and nitrogen sewage which are difficult to treat by the conventional activated sludge process and contain macromolecules and difficultly-degradable harmful constituents.

The invention discloses a large-scaled culture method of high-concentration nitrosobacteria and application thereof. The method comprises the following steps of: (1) adding an enrichment culture solution with initial ammonia nitrogen mass concentration of 30-500mg / L in a reaction device with functions of stirring, heating and aeration; preparing activated sludge of a waste water treatment plant in activated sludge of 0.5-20% for primary inoculation to conduct the enrichment culture of the nitrosobacteria by 2-6d as a culture cycle, wherein extra ammonium salts and a growth promoter are added during the enrichment culture of the nitrosobacteria; (2) ending the culture when the concentration of NO2-N in the solution is accumulated to reach 70-95% of the concentration of total nitrogen; adding a flocculating agent for flocculation and sedimentation; and allowing to stand still to remove supernate, and then adding the enrichment culture solution to start the culture of the second cycle; and (3) continuously conducting 3-8 cycles of the enrichment culture to obtain the high-concentration nitrosobacteria. By adopting the nitrosobacteria to strengthen the bi-nitrification treatment of ammonia nitrogen contained waste water, the method has the advantages of high stress resistance, low cost and high efficiency and is suitable for the complicated treatment of ammonia nitrogen contained industrial waste water.

The invention relates to a method for treating waste water from a power plant and a system for realizing the same. The system comprises a pre-treatment system and an evaporative crystallizing system which are connected with each other; the pre-treatment system is connected to the waste water from the power plant, the majority of SS, heavy metals, Mg<2+>, F<-> and sulfate radicals in the waste water from the power plant are removed by coagulating sedimentation, and organic pollutants and ammonia nitrogen are also removed; the CaSO4 content in the waste water is adjusted to be far less than saturated concentration of the CaSO4, and the pH value is adjusted back to make partial CO3<2-> converted into HCO3<->; and the waste water treated by the pre-treatment system flows in the evaporative crystallizing system, by evaporation concentration, the dissolved solids in the waste water reach and exceed the saturated concentration to form salt crystal, and the solid-liquid separation is performed. The method has the advantages of effectively removing suspended matters, organic matters, fluorine and heavy metals in the waste water from the power plant, removing dissolved salt such as Ca<2+>, Mg<2+>, Cl<->, SO4<2-> and the like which can not be removed by the prior method for treating the waste water from the power plant, and basically meeting zero emission, and the treated waste water can be reutilized.

The invention discloses a enrichment method of nitrifying organism. The method adapts discontinuous activated sludge process by gradually improving ammonia nitrogen ph indicator in nutrient fluid to enrich. The main component of the enrichment nutrient fluid is inorganic salt comprising microelement Fe, Mg, Na, K and amortization liquor, in which inceptive concentration of NH(4)(+-N) is 100mg / L to 200mg / L, final concentration is 500mg / L to 1200mg / L and COD is less than or equal to 200mg / L. The method can restrain evidence the growth of sundry bacterium such as carbonizing bacterium, is propitious for nitrifying organism to become ascendency bacterium and resist more and more high ammonia nitrogen concentration, and finally disposing concentration of the ammonia nitrogen wasted water is up to 1200mg / L and high concentration ammonia nitrogen in wasted water can be reduce to less 10mg / L.

The invention discloses a method for automatically monitoring water quality indexes on line and a device for implementing the method. A method of combining an ultraviolet and visible spectroscopy and various sensors is adopted, dozens of water quality indexes including chemical oxygen demand and ammonia nitrogen can be measured at one time, measurement indexes can be configured in a building block mode according to requirements, and chemical agents are not required. According to the device, the constructed digital optical fiber spectrometer is taken as a core, ultraviolet and visible absorption spectrum data of a water sample is processed in a mode of sequentially combining wavelet de-noising, principal component analysis and a support vector machine, and water quality indexes such as chemical oxygen demand and biochemical oxygen demand of water are acquired. Various physical and electrochemical sensors acquire water quality indexes such as ammonia nitrogen, dissolved oxygen and conductivity. All hardware and software for implementing the method is put in a cabinet to form the device, and the device analyzes the introduced water sample under the control of an embedded industrial control computer system, and automatically monitors the water quality indexes in real time.

The invention discloses a device and a method for denitrification of single stage autotroph in low-cellulose nitrate (CN) high-ammonia nitrogen waste water. The device comprises a raw water tank, a water inlet pump, a reactor, a secondary sedimentation tank and a sludge reflux pump, wherein overcurrent holes are arranged in the water flow direction of the reactor in an up-and-down alternative form and connected with various grid chambers, an anoxic zone grid chamber is arranged at the front end of the reactor, and an aerobic zone grid chamber is arranged at the back end of the reactor; the anoxic zone grid chamber is provided with a stirrer and an agitator blade; the aerobic zone grid chamber is provided with the stirrer, the agitator blade, an aeration riser pipe and an intermediate perforated clapboard; and the aeration riser pipe is internally provided with an aeration head, and sponge filling material is filled below the intermediate perforated clapboard, wherein filling ratio is 30-50%. In the method, shortcut nitrification is achieved above the aerobic zone through low dissolved oxygen (DO is 0.5 <-1>mg / L) and free ammonia (FA) inhibition so that ammonia nitrogen is converted to nitrite nitrogen; and anoxicammoxidation biomembrane acts on the lower part of the aerobic zone, the nitrite nitrogen and ammonia nitrogen are converted to nitrogen, thereby achieving denitrification of autotroph. The method has the advantages of low oxygen consumption, less sludge output and no extra carbon source.

The invention relates to a process for leaching rare earth from ion-adsorption type rare earth ore without using ammonium salt. The process comprises the step of replacing ammonium salt by taking a mixture of calcium, magnesium and sodium salts as a leaching agent and taking non-ammonium salts, such as calcium hydroxide, magnesium hydrate or sodium hydroxide as a precipitator. According to the process disclosed by the invention, the ammonia nitrogen pollution problem in exploitation of ion-adsorption type rare earth is radically solved; environmental-friendly exploitation of the ion-adsorption type rare earth can be realized; the process disclosed by the invention has higher economic benefit and social benefit.

The invention concerns a way of synthesize stone using coal powder and its applying in removing nitrogen and phosphorus in the waste water. Get the coal powder as the material, add the material including aluminum, silicon, or fluorine which can saluted in the alkaline solution, after mixing, add metal alkaline solution and synthesize fei stone by water heating reaction, then change shape by metal salt aqua, we get the fei stone after separating solid and liquid. Change the fei stone to the grains and put them in the filtering bed, achieving to remove nitrogen and phosphorus. The invention solves the environment problem, economy the resource of nitrogen and phosphorus in the coal powder, no second pollution.

The invention relates to a biological denitrification method for salt-containing sewage, which comprises the following steps: adding a denitrification microbial inoculant into a biochemical sewage treatment system, and simultaneously starting the nitrification-denitrification biological denitrification treatment processes, wherein the sewage treatment temperature is 18-40 DEG C, the dissolved oxygen is 0.1-5 mg / L, and the pH value is 7.0-9.0. The denitrification microbial inoculant contains one or two of Staphylococcuscohnii FSDN-C, Arthrobactercreatinolyticus FDN-1 and Flavobacteriummizutaii FDN-2, and also contains one or two of Paracoccusdenitrificans DN-3 and Methylobacteriumphyllosphaerae SDN-3. The method provided by the invention can effectively treat high-salt-content sewage, enhances the adsorptivity and flocculence for sludge, has wide application range for wastewater quality and high impact resistance to salt-containing sewage, and obviously enhances the sewage treatment effect on the premise of removing pollutants, such as ammonia nitrogen, COD (chemical oxygen demand) and the like.

The invention discloses a biological disposing method of waste water through coupling the anaerobic ammonoxidation and methanation denitrification, which is characterized by the following: inoculating the particle sludge with methanation, denitrification and anaerobic ammonoxidation activity in the expansion grain sludge bed (EGSB); inoculating aerobic ammonoxidation bacteria in the biological aerating filter (BAF) or SHARON technique or SBR reactor; connecting the EGSB reactor and BAF or SHARON technique or SBR reactor; realizing the biological disposal of waste water through controlling pH value, temperature, dissolved oxygen, external reflow rate, load velocity, oxidizing reducing potential and organic COD density, ammonia nitrogen density.

The invention discloses a resource recovery and zero discharge process for treating rare-earth wet-method smelting wastewater, which comprises the following steps: (1) carrying out segregated collection on wastewater; (2) pretreatment: recovering kerosene and P507 from wastewater by floatation oil removal, and precipitating by adding alkali to remove heavy metals and oxalate radicals; (3) recovering NH4Cl in high-concentration ammonia nitrogen wastewater by triple-effect evaporation, concentration and crystallization; (4) denitrifying medium / low-concentration ammonia nitrogen wastewater by ammonia stripping / absorption; (5) carrying out reverse osmosis desalination advanced treatment on the wastewater; and (6) recovering CaCl2 by evaporating, concentrating and crystallizing the reverse osmosis concentrated water. The invention can produce certain economic benefits by recovering kerosene, P507 and industrial-grade NH4Cl products in the wastewater, and the wastewater can achieve the water quality standard for reuse water, thereby realizing zero discharge of wastewater in rare-earth wet-method smelting enterprises.

The invention relates to a compound microecological preparation used to purify aquaculture water in the field of aquiculture, a preparation form and a preparation process thereof; the preparation is composed of photosynthetic bacterium, bacillus subtilis, denitrifying bacterium, coagulant aid and auxiliary components; the preparation form is composed of an inner layer and an outer layer, wherein, the outer layer comprises bacillus subtilis, denitrifying bacterium and coagulant aid, and the inner layer comprises solid photosynthetic bacterium particles. The invention breaks through the prior theory that people keeps using nitrite bacteria and nitrobacteria to solve the problem of the accumulation of ammonia nitrogen and nitrite in the aquaculture water in the control of aquaculture water, introduces an advanced SHARON theory in wastewater treatment, integrates the characteristics of the aquaculture water quality, purifies the aquaculture water with denitrifying bacteria strains as the main bacteria strains, can quickly and effectively reduce the content of NH3 and NO2- in the aquaculture water, is not inhibited by the concentration of the NO2-, and effectively reduces the oxygen consumption in the aquaculture water.

The invention discloses a device and method for nitrogen and phosphorus removal treatment by denitrification on high-ammonia nitrogen anaerobic ammonia oxidation effluent and domestic sewage, belonging to the field of biological sewage treatment. The device comprises a high-ammonia nitrogen inflow water tank, an integrated partial nitrification and anaerobic ammonia oxidation reactor, a sedimentation tank, a domestic sewage inflow water tank, a denitrification nitrogen and phosphorus removal reactor and an effluent water tank sequentially connected in series. The method comprises the following steps: in the integrated reactor, effectively removing nitrogen of the high-ammonia nitrogen wastewater through the effect of partial nitrification and anaerobic ammonia oxidation; in the denitrification nitrogen and phosphorus removal reactor, performing anaerobic phosphorus release by phosphorus-accumulating bacteria by use of an organic carbon source in the domestic sewage, and performing hypoxia denitrification phosphorus removal by use of nitrate nitrogen in the anaerobic ammonia oxidation effluent; and finally, further absorbing phosphorus at the aerobic zone in accompany with the nitrification effect generated by the nitrification bacteria. According to the method, the nitrogen removal by anaerobic ammonia oxidation and phosphorus removal by denitrification are coupled into a biological nitrogen and phosphorus removal system for sewage, the nitrate nitrogen generated in the anaerobic ammonia oxidation process is effectively utilized, and the oxygen consumption and energy consumption are greatly reduced.

The invention discloses a breeding sewage treatment method which comprises the following steps of: firstly deslagging sewage, then hydrolyzing, acidifying and regulating, then treating the sewage through a UASB (Upflow Anaerobic Sludge Blanket) reactor, and then carrying out corresponding biochemical treatment through a first-stage A / O treatment system, an intermediate sedimentation tank and a second-stage A / O treatment system sequentially; then sequentially carrying out dephosphorization treatment and flocculation treatment on the sewage subjected to the biochemical treatment to remove sediments, wherein supernatant liquid flows into a final sedimentation tank for further sedimentation, and then the supernatant liquid flows into a pH regulating tank so that the pH value of the supernatant liquid is regulated to be 6-9; then carrying out sterilizing treatment so as to achieve emission on standard. The breeding sewage treatment method disclosed by the invention realizes high-efficiency low-consumption synchronous treatment on carbon, nitrogen and phosphorous to remove total nitrogen, ammonia nitrogen and total phosphorus, thereby ensuring the water quality, improving the production efficiency and greatly reducing the production cost; the breeding sewage treatment method disclosed by the invention has the advantages of simple process, stability in system, small occupied area, low operating cost and the like.

The invention provides complete equipment and process for processing coal tar wastewater, and belongs to the technical field of environmental conservation. The process comprises the following steps of: adopting different removal principles according to different physicochemical properties of heavy oil, light oil and emulsified oil; scientifically and orderly removing the heavy oil, light oil and emulsified oil through three sets of environmental conservation equipment such as a multi-stage oil separator, an oil-water separator and an air floating tank gradually; combining a micro electrolysis reactor with a five-section integrated oxidization device; and firstly destroying a benzene ring by microelectrolysis, and then strongly oxidizing various organic matters through an oxidant, so that the COD (chemical oxygen demand) and the chromaticity are greatly reduced. Ammonia nitrogen can be efficiently removed by a denitrification system; the denitrification system is low on requirements of pH value and temperature, and low in operation cost; the denitrification system is arranged behind the five-section integrated oxidization device; the reaction change of power of hydrogen is fully considered; and the complete equipment complies with the scientific principle, and can be used for reducing feeding of acid and alkali, and lowering the operation cost.

The invention relates to a composite microorganism preparation and application thereof in waste water treatment. Adopted strains can be obtained conveniently by separation from the nature in a conventional strain identification separation method by those skilled in the art, or are publicly purchased through commercial channels. The composite microorganism preparation is obtained after each culture solution and microorganism carriers are mixed according to a certain proportion. The composite microorganism preparation can be directly placed in a biochemical reactor in one time, building of a microorganism-system integral food chain is effectively promoted, utilization of nutrient substance in water by the microorganisms is promoted, and efficient removal of pollutants such as organic matter(CODcr) and ammonia nitrogen is achieved.

The present invention discloses a short-cut nitrification-denitrification microbial agent. The microbial agent contains Arthrobacter creatinolyticus FDN 1, Flavobacterium mizutaii FDN 2, Paracoccus denitrificars DN 3 and Methylobacterium phyllosphaerae SDN3. The preservation register numbers of the four strains respectively are CGMCC No.3657, CGMCC No.3659, CGMCC No.3658 and CGMCC No.3660. With the microbial agent, the ammonia nitrogen removing, the total nitrogen removing and the CODcr removing in the same reactor can be achieved, the wastewater treatment effect is good, and the microbial agent is especially suitable for the purification treatment of the wastewater containing the ammonia nitrogen so as to really achieve the short-cut nitrification-denitrification or simultaneous nitrification and denitrification.

The invention discloses nano biological filler for purifying aquaculture wastewater in a biological filter tank and a preparation method of the nano biological filler. The biological filler comprises an EM rejuvenation solution and an adsorption carrier of the EM rejuvenation solution, wherein the EM rejuvenation solution is a product obtained by performing mixed fermentation on an EM stock solution, molasses and deionized water; the adsorption carrier is obtained by performing mixed pressing on composite nano powder, kaolin powder and modified bentonite; the composite nano powder is a product obtained by performing mixing and high-temperature sintering on nano-level aluminum oxide, titanium dioxide and silicon dioxide; modified bentonite is prepared from sodium diethyldithiocarbamate modified original soil. The preparation method comprises the following steps: pressing adsorption carrier particles; fermenting to obtain the EM rejuvenation solution; dipping the EM rejuvenation solution by using the adsorption carrier to obtain the nano biological filler. The obtained nano biological filler is high in pore volume, high in cell adsorption capacity, large in specific surface area and strong in stability, has a good treatment effect on aquaculture sewage, and can be used for rapidly removing ammonia nitrogen, phosphorus and heavy metal ions in an aquaculture water body.

Belonging to the field of environmental microorganism application, the invention discloses a Bacillus subtilis strain and application thereof. The strain is named as Bacillus subtilis CM-A12, is currently preserved in China Center For Type Culture Collection (called CCTCC for short) with a preservation number of CCTCC NO:M 2015688, and the preservation date is November 23, 2015. The Bacillus subtilis strain provided by the invention has the advantages of simple cultivation condition, high temperature resistance, acid and alkali resistance, and high salinity resistance, can secrete protease, amylase and cellulase, and can effectively improve water quality and reduce COD and ammonia nitrogen in water.

The invention discloses a method for preparing an aerobiotic nitrifier immobilizing vector, and belongs to the field of water treatment. The method comprises the steps of: firstly, carrying out acid washing on thermally modified attapulgite; adsorbing the nitrifier using the nanometer grade attapulgite; carrying out rapid inclusion by using the mixture gel of polyvinyl alcohol (PVA) and sodium alginate (SA); dropping the mixture into a crosslinking agent to soak for 24 hours using a granulator to obtain an immobilized nitrifier pellet; and finally, repeatedly washing the immobilized nitrifier pellet for three times using normal saline to obtain a vector particle. By taking advantage of pretty large specific surface area and pretty strong adsorption performance of the modified attapulgite, an adsorption vector which is conductive to the growth and reproduction of the aerobiotic nitrifier is prepared; the modified attapulgite is capable of ammonia and nitrogen adsorption, and can increase the ammonia and nitrogen removal rate in water; the carrier particle composited from the modified attapulgite and a macromolecular material can improve the activity and ammonia and nitrogen removal capacity of denitrification microorganisms; and the repeated use rate of the carrier is high.

The invention discloses a preparation method of an embedding microbial agent for in-situ purification of a water body, which compounds a plurality of microbial strains suitable for the sewage treatment with enzyme preparation, and adds nutritive salt and growth factors needed by the microbial growth in an embedding carrier so as to be more suitable for the microbial growth, so that the defects of deficient nutrition of the water body and low sewage treatment efficiency are overcome. Active carbons with strong adsorption capacity and diatomite with greater specific gravity are added in the embedding carrier; polyglutamic acid is added in the embedding carrier; the polyglutamic acid reinforces the strength of embedding particles; meanwhile, glutamic acid obtained by degrading the polyglutamic acid can be used as nutritional ingredients for the strain growth, so that preparation can be preferably colonized in a river channel without easily losing. After the embedding microbial agent is used for treating sewage for three weeks, the ammonium-nitrogen removal rate reaches 85-90%, and the COD (Chemical Oxygen Demand) removal rate reaches 90-95%.

The invention discloses a method and a device for simultaneously carrying out wastewater treatment and power generation by using a photocatalysis associated microbial fuel cell technology. The device takes conductive glass coated with an n-type semiconductor photocatalyst film as an outside wall of a cathode chamber and takes conductive glass coated with an n-type semiconductor photocatalyst film as an outside wall of an anode chamber, a conductive filler respectively connected on the outside walls of the cathode chamber and the anode chamber is used as an electrode of a microbial fuel cell. The conductive filler is a carbon fiber rope for microbial growth. Denitrifying bacteria and nitrifying bacteria are respectively cultivated at the cathode and anode of the microbial fuel cell, and mainly used for the degradation of organic matters and the removal of ammonia nitrogen. Under the irradiation of ultraviolet light, electrons flow from the anode to the cathode, so that the anode has strong oxidability, and the cathode has strong reducibility. In the invention, the functions of microbial fuel cells and a photocatalysis technology are mutually associated, so that the wastewater treatment cost is low, and the generating capacity is large.

The invention provides a technology and a method for treating urban sewage by three-section short-cut nitrification / anaerobic ammonia oxidation, and belongs to the technical field of biological treatment of sewage. A raw water tank, an organic substance removal sequencing batch reactor (SBR), a first regulating water tank, a short-cut nitrification SBR (provided with an on-line monitoring and feedback control system), a second regulating water tank and an autotrophic nitrogen removal up-flow anaerobic sludge bed / blanket (UASB) reactor are sequentially connected in series in the technology; and the sludge is separated according to the sludge age, so that the contradiction between denitrification and phosphorus removal sludge age is solved. By applying the real-time control technology of the short-cut nitrification SBR to the autotrophic nitrogen removal technology, the problems that the half short-cut of low ammonia nitrogen short-cut nitrification in continuous flow is difficult to maintain, the concentration ratio of ammonia nitrogen to nitrous in the effluent is difficult to control and the like are solved. By successfully applying the anaerobic ammonia oxidation technology todeep denitrification treatment of the domestic sewage, urban sewage treatment with high efficiency and low energy consumption is realized.