37results about How to "Realize denitrification" patented technology

The invention relates to a technology for coupling wastewater denitrification and biogas desulphurization, which is characterized in that: wastewater or pretreated wastewater flow into an anaerobic digestion unit; organic matter in the wastewater is transformed to biogas, and organic sulfur and sulfate are transformed to hydrogen sulfide, and organic nitrogen is transformed to ammoniacal nitrogen by the anaerobic digestion unit. The effluent of the precipitated anaerobic digestion unit flows into a digestion liquid aerobic processing unit; residual organic matter is degraded and the ammoniacal nitrogen is transformed to nitrate nitrogen or nitrite nitrogen by the digestion liquid aerobic processing unit. A denitrification and desulphurization unit adopts a tower reactor; the effluent of the precipitated aerobic processing unit flows into the reactor from the top of the tower reactor and the biogas generated by the anaerobic digestion unit flows into the reactor from the bottom of the tower reactor. The nitrate nitrogen or the nitrite nitrogen is transformed to nitrogen and the hydrogen sulfide is transformed to elemental sulfur or the sulfate by the tower reactor. The technology for coupling wastewater denitrification and biogas desulphurization has the advantages that: the nitrogen in the wastewater and the sulfur in the biogas are removed at the same time; no extra carbon source is needed in the denitrification of the anaerobic digestion liquid; no other catalyst and oxidizer are needed in the biogas desulfurization; little biological mud is generated and the operation cost is low.

An integrated carbon and nitrogen removal bioreactor comprises a reactor body, a pedestal, a support arranged in the periphery of the reactor body, a main water inlet tube, and a main water outlet tube connected with an outside water source, the inner chamber of the reactor body is divided into a first chamber and a second chamber which are independent through a vertical separator plate, and the first chamber is connected with the second chamber through a second water inlet tube; the first chamber is an anaerobic digestion unit used for filling anaerobic granular sludge; the second chamber is sequentially divided into a water inlet area provided with an aeration device, a short-cut nitrification unit used for filling a lightweight biological carrier, an anaerobic ammoxidation unit used for filling a suspension filler, and a water outlet area from top to bottom; the bottom of the anaerobic ammoxidation unit is provided with a second mud discharge port provided with a control valve; and the water outlet area is provided with a water outlet connected with the main water outlet tube. The integrated carbon and nitrogen removal bioreactor has the advantages of full recovery and utilization of energy contained in organic matters in wastewater, low nitrogen removal cost, and realization of comprehensive productivity in the wastewater treatment process.

The invention discloses a method for carrying out in-situ remediation on underground water nitrate pollution by adopting an iron fuel cell. The method is characterized in that a double-chamber iron fuel cell is constructed, wherein an anode is arranged in an anode chamber filled with a pH buffer solution, an underground water-containing layer polluted by nitrate in an anaerobic environment is used as a cathode chamber, and a cathode is arranged in the cathode chamber; the anode and the cathode are connected by a lead, and a connecting resistor is connected in the lead in series; and both ends of a salt bridge are respectively soaked in the solutions of the anode chamber and the cathode chamber. The method has the advantages of simple structure, no organic carbon source, microbial strain or any other chemical substance needs to be added into the underground water, operation and maintenance are convenient, the method is quick to start, the nitrate degradation speed is high, the pollution remediation period of the underground water is short, the construction investment and the running cost are low, and no secondary pollution is generated.

The invention relates to a sewage treatment device, and particularly to a multilevel biological contact oxidation reactor sewage treatment device. The device comprises at least two biological contact oxidation tanks and one sedimentation clarification tank which are in series connection via connecting pipelines. Each biological contact oxidation tank is formed by a cylindrical outer tank body and a frusto-conical inner tank body. The inner and outer tank bodies communicate with each other via an annular diversion gap. A floating imitation aquatic plant biological filler system and an aeration system composed of an aeration machine, main air pipes and an aeration pipe are arranged inside each inner tank body. The sedimentation clarification tank comprises a sedimentation clarification tank body, the lower part of which is a mud collection part in an inverted frusto-conical shape; a vertical flow pipe is arranged at the axial center of the sedimentation clarification tank body; and a submersible sewage pump for mud removal is placed in the mud collection part and connected to a mud outlet pipe. The aeration machine and the submersible sewage pump are connected to an automatic control system. The device provided by the invention is high in processing efficiency, low in energy consumption, convenient for manufacturing and installation, and easy for use and maintenance.

The invention belongs to the technical field of microbial denitrification, and discloses an acid-resistant and alkali-resistant aerobic denitrifying bacterium capable of rapidly denitrifying, a microbial agent and application thereof, the aerobic denitrifying bacterium is a Pseudomonas plecoglossa strain ZY-3, is preserved in Guangdong Microbiological Culture Collection Center (GDMCC) on January 4, 2022, and has a preservation number of GDMCC No: 62181; the strain and the inoculant have the heterotrophic nitrification and aerobic denitrification capabilities at the same time, the growth speed is high, the nitrogen reduction rate is high, and the strain and the inoculant can be respectively utilized and used as a unique inorganic nitrogen source for aerobic nitrification and denitrification nitrogen removal. The strain and the microbial inoculum can play a nitrification-denitrification role in a water body environment with the pH value of 5.5-10.5, and meanwhile, the strain and the microbial inoculum have good biological safety.

The invention discloses a method for achieving sewage treatment continuous short-term nitrification and denitrification through sludge fermentation products, and belongs to the field of sewage treatment. The apparatus of the present invention mainly comprises a sewage raw water tank, a sludge fermentation product storage tank, a sewage treatment continuous stream reactor and a precipitation pool, wherein the sewage treatment continuous stream reactor comprises all forms of continuous stream reactors in the sewage treatment, wherein mainly the NOB activity is inhibited through the sludge fermentation product, such that the aerobic section in the continuous stream is subjected to the short-term nitrification reaction. According to the present invention, the method is simple and feasible, can solve the problem of difficult achievement of the continuous stream short-term nitrification, can provide the nitrite nitrogen for the denitrification and anaerobic ammonium oxidation, and further can achieve the purposes of energy saving and consumption reducing.

The invention discloses an improved up-flow composite anoxic tank. The improved up-flow composite anoxic tank comprises an anoxic tank and a reaction tank arranged outside the anoxic tank, anaerobic tank is mounted at one side of the anoxic tank, the anoxic tank is juxtaposed with the aerobic tank in the reaction tank, a water outlet is arranged in a position, close to the aerobic tank, of the upper end of one sidewall of the anoxic tank, and a regulating tank is arranged at the left side of the aerobic tank. A Venturi tube is arranged to replace a submersible mixer in a traditional anoxic tank to achieve the stirring function, so the investment, operation and maintenance of the submersible mixer in the traditional anoxic tank are saved, and the cost is greatly reduced; a mixed solution can well contact with denitrifying bacteria in the up-flow process to make the denitrifying bacteria play a role in denitrification in order to achieve nitrogen removal; short-flowing of wastewater canbe effectively prevented to ensure the high efficiency of an anoxic reaction; a nitrifying solution can be recovered and reused, so resources are saved; and denitrifying bacteria micelles can be retained to prevent the loss of denitrifying bacteria micelles.

The invention relates to a sewage treatment device which comprises a plurality of packing cups and packing, and the packing cups are sequentially stacked in the vertical direction. The packing is arranged in the packing cups and is used for the growth of biofilms. The packing cups can be rotationally switched between a first position and a second position. When each packing cup is positioned at the first position, the inclination angle of each packing cup is a first angle, the sewage can flow through the plurality of packing cups in sequence from top to bottom by virtue of gravity, and can bein full contact with the biofilms grown on the corresponding packing in the process of flowing through the packing cups and form water films on the surfaces of the biofilms, so that the biofilms grownon the packing in the plurality of packing cups perform biochemical treatment on the sewage in sequence; and when each packing cup is located at the second position, the inclination angle of each packing cup is a second angle, and the second angle is larger than the first angle, so that aged biofilms and dirt attached to the packing in the packing cups are separated from the packing by virtue ofgravity and are discharged from the corresponding packing cups.

The invention relates to an electro-coupling biological carbon removal and denitrification treatment method of low C/N ratio wastewater, aiming at solving the technical problems that in an upgrading and reconstruction process of low C/N ratio lightly-polluted wastewater carbon removal and denitrification, a treatment process needs to be added, an external carbon source is artificially added, and the operation effect stability is poor. A wastewater treatment system adopted by the method comprises a water inlet pump, a reactor and an outlet sump, wherein the reactor comprises a reaction tank, apositive electrode plate, a negative electrode plate, an aeration device and bio-filler; a wastewater inlet and a wastewater outlet are respectively formed at two ends of the reaction tank; the bottomof the reaction tank is inoculated with a heterotrophic nitrification-aerobic denitrification enrichment bacteria solution and aerobic sludge; the positive electrode plate and the negative electrodeplate are fixed in the reaction tank. Furthermore, the electro-coupling biological system is capable of providing matrix H2 and can enhance the microbial activity. Therefore, a carbon source requiredfor nitrogen removal by denitrification of the system microorganism is reduced, so that the effluent water quality can reach a class A emission standard or even a stricter local standard when the C/Nratio is only 2-5.

The invention discloses movable emergency treatment equipment for sewage. The equipment comprises a container and further comprises a flocculation tank, a sedimentation tank, a membrane tank, a nanofiltration system, a nanofiltration water tank, a break point chlorination tank, a clean water tank and an activated carbon filter tank which are located in the container and sequentially communicate with each Other, wherein lifting equipment and dosing equipment are arranged in front of the flocculation tank; a lifting pump I and a pipeline mixer are arranged between the nanofiltration water tank and the break point chlorination tank; an outlet of a sodium hypochlorite dosing system communicates with an inlet of the pipeline mixer; a plurality of ceramic membranes are arranged in the membrane tank; and a plurality of tubular nanofiltration membranes are arranged in the nanofiltration tank. The invention also discloses an emergency treatment process for sewage. The process adopts the movableemergency treatment equipment for sewage treatment. The device does not need to be assembled on site, can be quickly put into use, and is convenient to move, stable in water outlet index and suitablefor emergency treatment of sewage.

The invention discloses a sewage treatment device, and belongs to the field of environmental treatment equipment. The sewage treatment device comprises a contact oxidation assembly, a precipitation and clarification assembly and an aeration assembly, wherein the contact oxidation assembly is communicated with the precipitation and clarification assembly; the aeration assembly can be driven to be embedded inside the contact oxidation assembly; the contact oxidation assembly comprises an inner reactor and an outer reactor which are arranged coaxially; the outer side of the inner reactor is annularly sleeved with the outer reactor. Through the outer reactor and the inner reactor which are sleeved coaxially and annularly, sewage can only reach the outer reactor through the inner reactor, so that spatial selective allocation of microorganisms at different growth stages with different functions is realized in a plug flow treatment way, the synergistic effect among microbial populations of the same type can be brought into full play, the synergistic effect among different microbial populations is overcome, and the treatment efficiency is improved remarkably.

The invention relates to the field of mariculture wastewater treatment and discloses a mariculture wastewater treatment system which comprises a water inlet area, a pollution reduction area and a water outlet area. Iron-carbon filler is added into the whole treatment system; the filler not only can be used as a micro electrode to improve the current density and conductivity, but also can be used as a carrier for attachment of microorganisms; meanwhile, iron in the iron-carbon filler accelerates reduction in the wastewater; Fe < 2 + > and Fe < 3 + > generated by the reaction react with complexation in the wastewater to form precipitates, so that dephosphorization is realized. That is, the physical, chemical and biological combined method is adopted, so that the wastewater treatment effect is improved; meanwhile, the hydrogen ions are generated on the surface of the cathode of the electrolysis device, a part of natural alkalinity in the mariculture wastewater can be neutralized, the alkalinity can be controlled within a proper range, and the operation cost is saved; in addition, the cathode of the electrolysis device reacts to generate HClO which has a certain effect of killing pathogenic bacteria, and the HClO oxidizes the nitrides in the wastewater to generate nitrogen, so that denitrification is realized.

The invention relates to urea-containing printing and dyeing wastewater processing equipment and its processing method. The equipment comprises a regulating tank, an oxidation reaction tank, a primary sedimentation tank, a hydrolysis acidification tank, an oxidation ditch and a secondary sedimentation tank. The regulating tank, the oxidation reaction tank, the primary sedimentation tank, the hydrolysis acidification tank, the oxidation ditch and the secondary sedimentation tank are successively connected to form integrated processing equipment. The urea-containing printing and dyeing wastewater processing equipment and its processing method combine advantages of coagulation, decoloration and nitrogen removal processing. After printing and dyeing mother liquor wastewater is treated by the processing method, ammonia nitrogen, chroma and COD can be effectively degraded. Processing can meet the requirement of discharging into a pipe network. The equipment and the method have low processing cost and are simple to operate and easy to control.

The invention relates to a sewage sludge treatment device. The sewage sludge treatment device comprises a concentrating device (1), a first heat exchanger (2), a second heat exchanger (3), an anaerobic digestion reactor (4), an aerobic digestion reactor (5) and a sludge dewatering device (6) which communicate with one another sequentially, wherein a medium inlet of a heat exchange tube 2a in the first heat exchanger communicates with a returned sludge outlet (5a) of the aerobic digestion reactor, an outlet of the heat exchange tube (2a) communicates with a returned sludge inlet (5b) of the aerobic digestion reactor, and an inlet of a distributing pipe (5e) of a spraying member (5d) at the upper part of an internal cavity of the aerobic digestion reactor (5) communicates with the outlet of the heat exchange tube (2a) in the first heat exchanger or is connected with and communicates with the middle section of a third tube element (9). The sewage sludge treatment device has the characteristics that the efficiency of removal of volatile suspended solids from sewage sludge can be increased, meanwhile, ammonia nitrogen is reduced, and the energy consumption is lowered.

The present invention relates to a sewage treatment device, which comprises a plurality of filler discs and fillers. The filler discs are sequentially stacked in the vertical direction, and the fillerdiscs can accommodate sewage to be treated. The fillers are arranged in the filler discs and are used for the growth of biological films. Sewage can flow through the filler discs in sequence from topto bottom by virtue of gravity, and can be in full contact with the biological films grown on the corresponding fillers in the process of flowing through the filler discs and form water films on thesurfaces of the biological films, so that the biological films grown on the fillers in the filler discs carry out biochemical treatment on the sewage in sequence. The sewage treatment device has the advantages of simple structure, easiness in implementation and high biochemical treatment efficiency. Moreover, a user does not need to additionally arrange a large number of power mechanisms to injectsewage into all the filler discs, and energy consumption is effectively reduced.

The invention discloses a sulfur-iron self-oxidation denitrification device and a reaction control method. The sulfur-iron self-oxidation denitrification device comprises an iron self-oxidation denitrification bin and a sulfur self-oxidation denitrification bin, a water inlet device is arranged in the iron self-oxidation denitrification bin, and the iron self-oxidation denitrification bin is communicated with the sulfur self-oxidation denitrification bin; a gas outlet pipe is arranged at the top of the sulfur self-oxidation denitrification bin; a gas concentration sensor, a gas flow sensor, a signal collector and a signal transmitter are arranged on the gas outlet pipe; a water outlet pipe is arranged at the middle lower part of the sulfur auto-oxidation denitrification bin; the signal transmitter transmits the gas data information to the control platform; and the invention further discloses the reaction control method. The nitration device disclosed by the invention is sufficient in reaction and good in reaction controllability.