331results about How to "Efficient denitrification" patented technology

The invention relates to an aerobic denitrification methylobacterium phyllosphaerae strain and application thereof. The aerobic denitrification strain is methylobacterium phyllosphaerae SDN-3CGMCC No.3660. The strain can be used for carrying out aerobic denitrification by using nitrate nitrogen and can also be used for carrying out hetetrophic nitrification-aerobic denitrification by using ammonia nitrogen, under aerobic and limited-oxygen conditions. The strain is stable in genetic character, and can be used for realizing synchronous nitrification-denitrification and independently completingthe whole process of biological denitrification. The strain is used for treating various nitrogen-containing wastewater by needing only one aerobic stage, the process is simple and the denitrification efficiency is high.

The present invention relates to a deep denitrification process and device for domestic sewage without additional carbon source. The present invention is a combination process composed of anaerobic acidification tank, micro-aeration vertical underflow wetland and horizontal underflow wetland. The specific process is as follows: The domestic sewage enters the anaerobic acidification tank; the effluent from the anaerobic tank enters the micro-aeration vertical subsurface flow wetland; the treated sewage from the micro-aeration vertical subsurface flow wetland enters the horizontal subsurface flow constructed wetland. The effluent from horizontal subsurface flow wetlands can be used to supplement static landscape water bodies and other purposes. The present invention controls the ratio of NH4+-N/NO3--N in the horizontal subsurface flow wetland influent to 1-1.4:1 through the adjustment of appropriate process parameters, and the actual BOD5/N is far lower than the theoretical value of denitrification BOD5/N Under these conditions, anaerobic ammonium oxidation can be stably realized in constructed wetlands, forming a low-cost, high-removal sewage deep denitrification process. Micro-aeration vertical flow wetlands + horizontal subsurface flow wetlands can be applied to sewage treatment plants. Advanced water treatment can also be used for decentralized domestic sewage treatment. The invention has the advantages of simple structure, low cost and convenient operation and maintenance, and can achieve a TN removal rate of over 95%, stable pollutant removal effect, and effluent water quality up to Class IV standard of surface water.

The invention discloses a sewage biochemical treatment integrated device, system and process method. The sewage biochemical treatment integrated device comprises a pond body (17), wherein an incline guide baffle plate (6) is arranged in the pond body (17), one side of the incline guide baffle plate (6) is provided with an aeration assembly (12) and a vertical gas stripping and reflowing assembly (4), an outer reflowing sludge discharging bucket/trough (13) is arranged between the aeration assembly (12) and the incline guide baffle plate (6), the other side of the incline guide baffle plate (6) is provided with a settling assembly (10) and an incline guide plate/tube (9) parallel with the incline guide baffle plate (6), a chemical spraying perforated pipe (8) is arranged above a water feeding hole of the incline guide plate/tube (9), a settled sludge discharging bucket/trough (14) is arranged below the settling assembly (10), and a movable shielding plate (16) is arranged above the settling assembly (10). The sewage biochemical treatment integrated device has the advantages of small occupation area, low energy consumption, engineering investment reduction, low operation cost and easiness in operation and management because of the combination of gas stripping and reflowing circulating denitrification and suspension cleared sediment dephosphorization.

The invention provides reinforced simultaneous nitrogen and phosphorus removal sewage treatment equipment and a method for municipal sewage with a low carbon source at low oxygen concentration. The equipment is composed of an SBR main reaction tank and two dephosphorizing tanks, wherein, the water inlet pipe of the SBR main reaction tank is led in from the upper part of the reaction tank, the water outlet pipe thereof is led out from the lower part of the reaction tank, and an external circulation sludge pipe is led out from the bottom of the SBR main reaction tank; the SBR main reaction tank is equipped with an aerating apparatus; and the SBR main reaction tank adopts an operation mode of water inflow in batches, and anaerobic-aerobic/anoxic alternation and sedimentation and drainage. The two dephosphorizing tanks have identical structure size and are respectively taken as an anaerobic phosphorus release tank and a chemical dephosphorizing tank in the same cycle for sewage treatment, and functions of the two tanks are exchanged in the next cycle. The invention can well realize reinforced simultaneous nitrogen and phosphorus removal treatment for the municipal sewage with a low carbon source under a low dissolved oxygen environment.

The invention relates to a process for treating livestock and poultry breeding sewage entering the Lake Taihu. According to the designed and adopted treating process, the technology that primary precipitation and filtration, anaerobic-aerobic biochemical treatment, dosing flocculation and coagulation reactions and membrane module filtration are combined is mainly used, and a material method for adding a compound water treatment agent is adopted, so that efficient denitrification, dephosphorization and COD reduction functions are realized; meanwhile, the process has good decoloration and sterilization effects. According to the process, the operation cost and the management cost are low, the sewage treatment effect is good, and treated livestock and poultry breeding sewage can reach the state-specified first-class discharge standard for sewage treatment in Lake Taihu regions.

The invention discloses a salinivibrio strain which can carry out biological denitrification under high-saline conditions, and an application thereof. The salinivibrio strain provided by the invention is collected in China General Microbiological Culture Collection Center (CGMCC) on 29th March, 2012 with a collection number of CGMCC No.5946. With a salinity (calculated according to NaCl) below 3-10%, the strain is placed in nitrogen-containing wastewater with dissolved oxygen of 2-6mg/L, such that biological denitrification can be carried out. The strain has high tolerance to high salinity, and grows well in a high-saline condition. The strain has both heterotrophic nitrification and aerobic denitrification capacities. Under a high-saline aerobic condition, the strain can carry out synchronous nitrification and denitrification, such that total nitrogen in sewage can be completely removed with high efficiency. Therefore, a major problem of biological denitrification under high-saline conditions is effectively solved, and a good application prospect is provided.

The invention relates to a heterotrophic nitrification-aerobic denitrification compound bacterial agent for low-temperature high ammonia-nitrogen removal and application. The compound bacterial agentis formed by compounding of 10-20% of cupriavidus SWA1, 5-20% of alcaligenes faecalis, 10-30% of acinetobacter and 20-50% of ochrobacterum TAC-2. The compound bacterial agent has advantages of high ammonia-nitrogen resistance, low-temperature resistance, heavy metal resistance and synchronous nitrification and denitrification; by synergistic effects of four microorganisms, efficient denitrification of high ammonia-nitrogen wastewater can be realized in an aerobic environment under low-temperature conditions.

The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.

A hydrolysis denitrification denitrification system and method. The system replaces the traditional anoxic tank with an upflow sludge bed hydrolysis reactor. The hydrolysis reactor includes: an effluent return channel, which is arranged between the sedimentation tank and the hydrolysis reactor, so that the discharged water from the sedimentation tank contains The nitrate supernatant is used as reflux to flow back into the hydrolysis reactor for hydrolysis, denitrification and denitrification. In the present invention, the hydrolysis reactor is used as the functional area of ​​pre-denitrification denitrification, and the good anaerobic environment in the hydrolysis reactor, the rapid recovery ability of the denitrification bacteria function and the sufficient supply capacity of organic matter are used to realize efficient and stable hydrolysis reaction. Nitrification and denitrification. The invention makes full use of the carbon source in the sewage, improves the denitrification efficiency, and reduces the energy consumption of the whole sewage treatment process. The invention can be combined with common urban sewage treatment processes such as AAO and oxidation ditch, and is convenient for upgrading and reforming existing facilities of sewage treatment plants.

The invention discloses an all-carbon flue gas denitrification system and method. Nitric oxides can be effectively removed with a carbon-based material as a catalyst and carbon monoxide as a reducing agent. The method includes the following steps that a reaction mode is determined according to the content of oxygen in flue gas and is divided into a high-oxygen mode and a low-oxygen mode; according to the high-oxygen mode, the flue gas and the reducing gas enter different reaction regions respectively to react for set time, then the flue gas enters the reaction region of the reducing gas for reacting, and the reducing gas enters the reaction region of the flue gas for reacting; according to the low-oxygen mode, the flue gas and the reducing gas enter the same reaction region to react; each reaction region contains the carbon support catalyst. By the adoption of the all-carbon denitrification system, efficient denitrification with the carbon-based material as the catalyst and the carbon monoxide as the reducing agent can be achieved, the denitrification cost is low, no other harmful ingredients are generated, and the all-carbon flue gas denitrification system is high in adaptability to temperature and components of the flue gas and particularly suitable for a power plant, a steel metallurgical industry and other industries with carbon materials as fuel.

A biomass carbon source release combination type ecological floating bed water purifying device comprises an ecological floating bed comprising a floating frame and a basket for planting an emergent aquatic plant, a packing groove comprising a groove body and a groove bottom board, and a bottom groove used for planting a submerged plant and internally provided with the packing groove, wherein each of the four corners in a groove body of the bottom groove for planting the submerged plant is provided with a bottom groove suspending ring at the upper end of a bottom groove suspending rod extending out of an upper port of the bottom groove body, each of the four corners in the groove body of the packing groove is provided with a groove body suspending rod extending out of an upper port of the packing groove, a groove body suspending ring at the upper end and the opposite part of the floating frame are respectively bonded by the two ends of an inner cable and an outer cable, the bottom groove used for planting the submerged plant and the packing groove are both made of a board uniformly provided with holes, an artificial water plant or/and a cob is/are suspended at the bottom part of a basket body of the basket for planting the emergent aquatic plant, a zeolite layer, a cob layer, a wheat straw layer and a coal cinder layer are respectively paved between vertical partition boards in the packing groove, and a rope provided with an anchor at the other end is bonded on a vertical floating tube on each of the two sides of the floating frame. The biomass carbon source release combination type ecological floating bed water purifying plant is applicable to open riverways, lakes or landscape water bodies.

The invention relates to a coke wastewater advanced treatment method utilizing a catalytic internal electrolysis technology and a coupled two-stage bio-filter. The method adopts a catalytic internal electrolysis method as the main processing technology to carry out a pretreatment on the coke wastewater biochemical effluent so as to improve the wastewater biodegradability, and then utilizes a two-stage bio-filter to carry out bio-processing to further degrade the pollutants in the wastewater. The method combines an electrochemical method and a biochemical method to degrade and remove pollutants in coke wastewater, thus has a high impact-resistant capacity, can remove COD, ammonia-nitrogen, and total nitrogen from the whole system at the same time, and greatly reduces the effluence color degree. The effluence processed by the method has a good water quality, and can stably meet the "emission standard of pollutants for coking chemical industry" (GB 16171-2012).

The invention relates to a catalyst unified plasma nitric oxide removing device and method. Smoke and ammonia are mixed and then introduced to a gas inlet in the lower part of a reactor which is a dual-layer medium structure, a metal net layer wraps the outer side of an outer medium pipe as an external electrode, a metal internal electrode is arranged in an inner medium pipe and is connected with a power source anode, and the external electrode is connected with a power source cathode to form a plasma generator; in the middle of the reactor, a partition plate with air vents is arranged in a cavity between the outer medium pipe and the inner medium pipe and is added with a catalyst Fe-Cu/CNTs; the mixed gas is subjected to unified denitration by the combined action of the catalyst and the plasma, is introduced into an alkali solution cleaning device from a gas outlet in the upper part of the reactor, and is exhausted by a chimney after being cleaned and absorbed. Ethylene is mixed in the mixed gas to further improve a nitric oxide removing rate. The device can efficiently denitrify at high and low temperatures, has an NO removing rate more than 96%, small energy consumption and high economic benefits.

The invention provides a dedusting and denitration system for thermal power plant fire coal smoke, which lowers denitration cost while ensuring that the system efficiently denitrate. The dedusting and denitration system is characterized in that heat exchangers comprise a heat exchanger I and a heat exchanger II; a coal economizer is provided with two smoke outlets, wherein one smoke outlet is ledto the high-temperature inlet of the heat exchanger I, and the other smoke outlet is led to the high-temperature inlet of the heat exchanger II; the high-temperature outlet of the heat exchanger I isconnected with the inlet of a smoke flow regulation valve; the outlet of the smoke flow regulation valve is connected with one inlet of a smoke mixer; the high-temperature outlet of the heat exchanger II is connected with the other inlet of the smoke mixer; the outlet of the smoke mixer is connected with the inlet of an efficient dust remover; the outlet of the efficient dust remover is connectedwith the low-temperature inlet of the heat exchanger II; the low-temperature outlet of the heat exchanger II is connected with the inlet of an SCR (Silicon Controlled Rectifier) reactor; the outlet of the SCR reactor is connected with an air preheater; and the low-temperature inlet to the low-temperature outlet of the heat exchanger I is low-temperature liquid.

The invention relates to a manganese based SCR (selective catalytic reduction) catalyst for low temperature denitration and belongs to the technical field of industrial denitration. The manganese based SCR catalyst for low temperature denitration is prepared by mixing the active components containing 3-10 wt.% of MnO2, 0.1-2 wt.% of CeO2 and 0.1-1 wt.% of Nb2O5, and the balance of a carrier TiO2. According to the technical scheme, MnO2, CeO2 and Nb2O5 are mixed to overall achieve the active window of the manganese based metal oxide catalyst within 150 DEG C to 260 DEG C, and the SCR reactor can be arranged after a dust removal device and a desulfurization device, in order to avoid hole plugging and poisoning in the use process of the catalyst improve the service life of the catalyst, and reach the removal denitrification efficiency of the catalyst to above 90%. The invention also relates to a preparation method of the catalyst. The preparation method has good practicality, and is easy for industrialized popularization and application.

The invention provides a method for producing small-molecule aromatics from a diesel oil raw material. According to the method, the inferior diesel oil raw material is subjected to reactions in a hydrofining reaction zone and a hydrocracking reaction zone I, and then a light gasoline fraction, a heavy naphtha gasoline fraction, an intermediate fraction and a tail oil fraction are obtained through separation and fractionation; the intermediate fraction enters a hydrocracking reaction zone II for a contact reaction with a second hydrocracking catalyst; the heavy gasoline fraction enters to a desulfurization reaction zone for further deep desulfurization, namely removal of thiofuran and mercaptan; after the removal is finished, the heavy gasoline fraction without thiofuran and mercaptan enters an aromatics extraction unit, and such small-molecule aromatics as benzene, toluene and dimethyl benzene are obtained through separation. Through adoption of the method, the inferior diesel oil raw materials can be effectively converted into benzene, toluene, dimethyl benzene and other high-value products; meanwhile, the blending components of part of light gasoline and low-sulfur diesel oil can be produced according to the method.

The utility model relates to a double-temperature double-bed gasification and oxidation fluidized bed incinerator for treating high-concentration organic waste liquid, which relates to a fluidized-bed incinerator for treating high-concentration organic waste liquid. The other end of the low-temperature flue 21 of the present invention is connected to the high-temperature oxidation circulating fluidized bed 60, and the two ends of the high-temperature air pipeline 30 are respectively connected to the high-temperature air preheater (15) and the low-temperature gasification fluidized bed 50. The combination of low-temperature gasification of low-temperature gasification fluidized bed and high-temperature combustion of high-temperature oxidation circulating fluidized bed in the present invention solves the problem of agglomeration and coking of fluidized bed materials, and effectively removes HCl and SO2 produced after incineration of high-concentration organic waste liquid Harmful gases such as NOx and NOx fully suppress the generation of dioxin in the furnace, and can completely incinerate the toxic organic substances in the waste liquid, and the incineration removal rate reaches more than 99.99%. The device almost solves all the problems encountered in incinerating high-concentration organic waste liquid in a fluidized bed.

The invention discloses a preparation method of a mixture of polyester and thermoplastic starch rich in starch and an application thereof, belonging to the technical field of environment protection. According to the method, the polyester and the thermoplastic starch rich in starch are taken as the raw materials, and addition agents such as aluminic acid ester coupling reagent and the like are added, thermoplastic starch/polyester blending material is prepared through banburying by a torque rheometer, and then a product is prepared through smashing, extrusion and pelleting. The thermoplastic starch base mixture rich in starch can be used as both a carbon source and a biofilm carrier for denitrification in the water treatment deep denitrification technology, so that the defect that the carbon source dosage is not easy to control in a conventional denitrification technology is overcome, the defects that the microorganism is difficult to form a membrane, the cost is high and the staring time is long when only biodegradable polymer is taken as a solid carbon source are overcome, and the thermoplastic starch base mixture rich in starch has strong adaptability to both water dissolved oxygen concentration and pH.

The invention provides a coking plant coke oven gas utilization and flue gas treatment system and method. A crude gas outlet of a coke oven is connected with a gas treatment device through a pipeline, and a gas outlet of the gas treatment device communicates with a coke oven gas boiler through a pipeline. A flue gas outlet of the coke oven communicates with a chimney through a coke oven waste gas flue, and the flue gas outlet of the coke oven further communicates with a high-temperature flue of the coke oven gas boiler through a second coke oven waste gas flue. The high-temperature flue of the coke oven gas boiler sequentially communicates with a denitration device, a waste heat recycling flue, an induced draught fan, a denitration device and the chimney through a pipeline. The invention further provides a method for treating flue gas through the system. By means of the coking plant coke oven gas utilization and flue gas treatment system and method, coke oven gas is efficiently utilized, meanwhile, emission of SO2 and NOX is effectively controlled, several treating difficulties of coke oven flue gas are overcome, and safe running of the coke oven is ensured.

The invention relates to a kitchen garbage slurry anaerobic fermentation wastewater treatment method, in particular to a treatment method for treating wastewater produced in other procedures through wastewater produced after anaerobic fermentation dehydration of kitchen garbage slurry and kitchen garbage. Wastewater is subjected to oil-separation primary precipitation, water amount and water quality adjustment, first pH value adjustment, free ammonia stripping in an ammonia stripping tower, second pH value adjustment, A/O biochemical treatment, precipitation treatment, treatment in a Fenton reactor and treatment in a coagulative precipitation tank, so that pollutants such as COD, BOD5 and SS in the wastewater are removed, TN and TP can be removed effectively, the wastewater chroma can be lowered effectively, the TN and TP removing rates are increased, and pollutants such as COD, BOD5, TN, NH3-N, TP and chroma in the treated wastewater can stably meet the requirements in Integrated Wastewater Discharge Standard (GB8978-1996, grade III standard) and Wastewater Quality Standards for Discharge to Municipal Sewers (GB/T 31962-2015, grade B).

Raw water containing ammonium-nitrogen is introduced into a nitrification tank and nitrification of nitrite-nitrogen by nitrite oxidizing bacteria is inhibited according to inhibition of the ammonium-nitrogen, thereby conducting stable nitrification of nitrous acid type at a high load by the action of ammonium oxidizing bacteria. Carbonate and/or bicarbonate are added into the nitrification tank 1. The inorganic carbon concentration in the nitrification tank 1 is maintained at 35 mg-C/L or more. The nitrified liquid thus obtained is introduced into a denitrification tank and denitrification reaction is conducted by the action of denitrifying bacteria with the remaining ammonium-nitrogen as an electron donor and the nitrite-nitrogen as an electron acceptor.