83results about How to "Realize deep denitrification" patented technology

The invention discloses a synergistic removal system and method for realizing ultra-low emission of multiple pollutants of smoke of a thermal power plant. By the aid of a synergistic dust-removal system consisting of a smoke cooler, an efficient dust remover, an efficient wet desulphurization system and a wet type electric dust remover, the total particulate matter emission in a chimney can be controlled within 5 mg / m<3>. By the aid of a synergistic mercury-removal system consisting of a selective catalytic reduction denitration system, the efficient dust remover, the efficient wet desulphurization system and the wet type electric dust remover, the emission concentration of mercury in the smoke at the chimney can be lower than 6 mu g / m<3>. By the aid of an efficient denitration system consisting of a low-nitrogen burner, a selective non-catalytic reduction denitration system and the selective catalytic reduction denitration system, the NOx concentration can be controlled within 50 mg / m<3>. A two-stage circulation two-tower limestone-gypsum wet desulphurization system is used, a rotary gas-to-gas heat exchanger is cancelled, the leakage of the original smoke to clean smoke is avoided, and the concentration of SO2 in the smoke can be controlled within 35 mg / m<3>. Besides, the synergistic removal system and method are low in overall investment level, and waste heat in the smoke can be recycled to reduce the energy consumption.

The invention discloses a device and a method for realizing sludge digestive fluid advanced nitrogen removal by a three-section type short-cut nitrification- anaerobic ammonia oxidation-short-cut denitrification process. Sludge digestive fluid firstly enters a short-cut nitrification reactor, residual nitrite from the last cycle is removed by sufficiently utilizing organic substances in the digestive fluid through anoxic stirring and then aeration is performed to carry out partial nitrification; effluent containing nitrite is mixed with another part of the sludge digestive fluid to obtain a mixture, the mixture enters an anaerobic ammonia oxidation reactor for denitrification, and effluent enters the short-cut denitrification reactor, so that nitrate generated in an anaerobic ammonia oxidation reaction process is converted into nitrite, and the nitrite flows back into the anaerobic ammonia oxidation reactor so as to be further removed together with ammonia nitrogen in raw material. According to the device and the method, excessive nitrate in the effluent of the anaerobic ammonia oxidation reactor is reduced into a substrate nitrite needed for anaerobic ammonia oxidation reaction; and moreover, carbon source consumption is low, sludge yield is low, and a three-section type reactor can beflexibly controlled, and is suitable for advanced nitrogen removal of wastewater with high ammonia nitrogen and a low carbon-nitrogen ratio.

The invention discloses an AOA coupled anaerobic ammonia oxidation deep nitrogen and phosphorus removal process, which comprises an anaerobic zone for internal carbon source storage and phosphate release, an aerobic zone for aerobic excessive phosphorus uptake and short-cut nitrification-anaerobic ammonia oxidation, and an anoxic zone for internal carbon source short-cut denitrification-anaerobic ammonia oxidation, wherein an active biological filler is added into the aerobic zone and the anoxic zone to enrich main functional bacteria, the anaerobic zone has long hydraulic retention time and can store an internal carbon source, the anoxic zone is located at the rear end of the aerobic zone and does not need nitrification liquid backflow, and an aeration zone is added at the rear end of the anoxic zone to improve sludge settleability. The AOA coupled anaerobic ammonia oxidation deep nitrogen and phosphorus removal process solves the problems of insufficient carbon source and incapability of synchronously and deeply removing nitrogen and phosphorus in the nitrogen and phosphorus removal process, reduces the loss of the carbon source, improves the utilization rate of the carbon source, reduces the operation energy consumption of a sewage treatment system, and bring a better application prospect to deep nitrogen and phosphorus removal of urban sewage.

A device and method for treating low-carbon municipal sewage by anaerobic and aerobic alternation realized synchronous short-cut nitrification and denitrification combined with anaerobic ammonium oxidation belongs to the field of biological treatment of sewage. The device includes a raw water tank, an intermediate water tank, a sequencing batch reactor (SBR), an up-flow anaerobic sludge bed reactor, an air compressor, a peristaltic pump and the like. The method comprises the following steps: adding domestic sewage into the first sequencing batch reactor, and realizing synchronous short-cut nitrification and denitrification in an anoxic / aerobic / anoxic operation mode to remove all degradable COD and a part of total inorganic nitrogen; and allowing water discharged from the SBR to go throughthe intermediate water tank and enter the up-flow anaerobic sludge bed reactor, and carrying out an anaerobic ammonium oxidation reaction to remove ammonia nitrogen and nitrous acid in the dischargedwater in order to finally realize the deep nitrogen and phosphorus removal of the domestic sewage. The device and the method are suitable for low-C / N municipal domestic sewage, and can reduce the aeration amount, reduce the energy consumption, provide an effective way for carbon separation, slow down the consumption speed of organic matters, improve the nitrogen and phosphorus removal efficiency and realize the reduction of excess sludge.

The invention provides a biofilm-based two-stage reinforced half-nitrosofication coupled anaerobic ammonium oxidation treatment device and method for urban domestic sewage, and belongs to the technical field of wastewater biological treatment. The device is mainly formed by connection of a raw water tank, a reinforced half-nitrosofication SBBR reactor, a middle water tank and an anaerobic ammoniumoxidation MBBR reactor in sequence. The method comprises the following steps: the urban domestic sewage firstly enters the reinforced half-nitrosofication SBBR reactor, front anoxic stirring can store an inner carbon source, low-oxygen aeration realizes half-nitrosofication, and the treated urban domestic sewage enters the anaerobic ammonium oxidation MBBR reactor for denitrification. The deviceand method provided by the invention solve the problems of low nitrogen removal efficiency and high effluent water total nitrogen of the urban domestic sewage, make full use of a carbon source in thedomestic sewage without the need for an external carbon source; and in addition, the biofilm-based reinforced half-nitrosofication coupled anaerobic ammonium oxidation process has a high nitrificationspeed and a high nitrogen removal load and total nitrogen removal rate, and can realize deep denitrification of the urban domestic sewage.

The invention discloses a pulverized coal burner and a boiler, which relate to a pulverized coal combustion technology, and solve the technical problem that NOx generation cannot be effectively restrained due to poor pulverized coal air flow dense-dilute separation effect and the like existing in the prior art. The pulverized coal burner comprises a central air duct, a primary air duct, a secondary air duct and a dual-section flow field generation structure arranged in the primary air duct, wherein the dual-section flow field generation structure can enable pulverized coal concentration of pulverized coal borne air flow which passes through the dual-section flow field generation structure and is ejected by the primary air duct to be distributed in a state of thick outside and diluted inside; a first annular recirculation zone is formed between the pulverized coal borne air flow with higher concentration and the pulverized coal borne air flow with lower concentration; a second annular recirculation zone is formed between the pulverized coal borne air flow with higher concentration and a secondary air flow ejected by an air flow channel formed between the secondary air duct and the primary air duct; a central recirculation zone is formed on a downstream region of the air flow with lower concentration. The boiler comprises the pulverized coal burner provided by the invention. According to the pulverized coal burner and the boiler provided by the invention, the generation of NOx can be more effectively restrained.

The invention discloses a device and method for synchronously treating high-concentration NO3--N waste water, sludge digestion liquid and municipal sewage. The NO3--N waste water and the sludge digestion liquid enter a first short-range denitrification reactor, NO3--N is converted into NO2--N through organic matter and an outer carbon source which are contained in the digestion liquid, and effluent containing NH4+-N and NO2--N enters an anaerobic ammonia oxidation reactor for denitrification; effluent containing nitrate nitrogen and the municipal sewage enter a second short-range denitrification reactor, NO3--N is converted into NO2--N in the presence of an organic carbon source in the municipal sewage, then the municipal sewage flow back to the anaerobic ammonia oxidation reactor, and NO2--N and NH4+-N are synchronously removed. The problems that when the high-concentration NO3--N waste water, the sludge digestion liquid and the municipal sewage are independently treated through a traditional method, the nitrogen removal efficiency is low, energy consumption is high, and the sludge output is high are solved, and according to the device and method, running cost I slow, the occupied area is small, the structure is simple, and optimal control is easy.

The invention provides a synchronous short-cut denitrification-partial nitrosation-anaerobic ammonia oxidation system for sewage. A reactor in the system is divided into the following communicated areas from bottom to top through partition plates: a short-cut denitrification area, a partial nitrosation-anaerobic ammonia oxidation area and a three-phase separation area. Sewage and nitrate nitrogen-containing reflux liquid enter the short-cut denitrification area, nitrate nitrogen is reduced into nitrite nitrogen through short-cut denitrification bacteria, and meanwhile organic matters are removed; water containing ammonia nitrogen and nitrite nitrogen passes through the partial nitrosation-anaerobic ammonia oxidation area, part of ammonia nitrogen is oxidized into nitrite nitrogen through ammonia oxidizing bacteria, meanwhile, the remaining ammonia nitrogen and nitrite nitrogen are denitrified through anaerobic ammonia oxidizing bacteria. A first partition plate is arranged between thepartial nitrosation-anaerobic ammonia oxidation area and the short-cut denitrification area; the three-phase separation area is used for separating a treated product, and a second partition plate is arranged between the three-phase separation area and part of the nitrosation-anaerobic ammonia oxidation area; the three-phase separation area is provided with a three-phase separator, and reflux liquid obtained after three-phase separation is pumped to the short-cut denitrification area through a reflux inlet.

The invention provides a device and a method for improving an A2NSBR two-sludge denitrification denitriding and phosphorus removal process on the basis of a DEAMOX technology, and belongs to the fieldof municipal wastewater biological treatment. The device mainly consists of a raw water tank, an A / A / O-SBR reactor, a first middle water tank, an N-SBR reactor and a second middle water tank. The method comprises the following steps that partial urban domestic sewage firstly enters the A / A / O-SBR reactor; denitrification phosphorus-accumulating bacteria release phosphorus under the anaerobic conditions; meanwhile, an outer carbon source in the sewage is absorbed and is converted into an inner carbon source PHA; after static precipitation, liquid supernatant enters the N-SBR reactor for nitration reaction; after the nitration reaction is completed, still standing precipitation is performed; the liquid supernatant flows back to an anoxic stage of the A / A / O-SBR reactor; denitrification phosphorus removal reaction, short-process denitrification reaction and anaerobic ammoxidation reaction are performed; then, micro aeration is performed to complete the rest phosphorus absorption and nitrogen gas blowing removal; then, still standing water discharge is performed. The double-sludge theory and the denitrification phosphorus removal and DEAMOX technology are used; the problem of too high ammonia and nitrogen content in outlet water of a conventional A2N process is solved; the deep denitriding is realized.

The invention discloses a device and a method for realizing deep denitrification of municipal sewage by coupling integrated short-cut nitrification and anaerobic ammonia oxidation with endogenous short-cut denitrification. The device comprises a municipal sewage raw water tank, a short-cut nitrification anaerobic ammonia oxidation coupling endogenous short-cut denitrification reactor and a water outlet tank. The method comprises the following steps: municipal sewage firstly enters a short-cut nitrification anaerobic ammonia oxidation coupling endogenous short-cut denitrification reactor, phosphorus-accumulating bacteria and denitrifying glycogen-accumulating bacteria release phosphorus while storing an internal carbon source, and the denitrifying glycogen-accumulating bacteria take in organic matters and convert the organic matters into PHAs to be stored in vivo; then low-oxygen aeration is carried out to convert part of ammonia nitrogen into nitrite nitrogen; anaerobic ammonia oxidation is performed on the residual ammonia nitrogen and the generated nitrite nitrogen to realize denitrification; and the generated nitrate nitrogen is used as an electron acceptor of denitrifying glycan-accumulating bacteria to perform endogenous short-cut denitrification, and the generated nitrite nitrogen can be continuously utilized for anaerobic ammonia oxidation. The method can stably realizelow C / N municipal sewage deep denitrification.

The invention discloses a nitrate nitrogen chemical separation-physical transfer-based deep denitrification process for sewage. The sewage denitrification process comprises the following steps of (1) loading an agent capable of removing nitrate nitrogen from water into a loading unit to form an agent unit, and feeding the agent unit to sewage in a sewage treatment unit which needs to reduce the content of the nitrate nitrogen for agent treatment; (2) completing treatment of the sewage after agent treatment for 1-5 hours, transferring the nitrate nitrogen in the sewage to the agent, wherein the total nitrogen content in the sewage is reduced and reaches the effluent standard; and (3) separating the agent unit from the sewage, physically transferring and immersing the agent unit into an anaerobic biological reaction unit, resolving the nitrate nitrogen on the agent into the anaerobic biological reaction unit in the reaction process and transforming the nitrate nitrogen into gaseous nitrogen through microbial denitrification action, thereby achieving removal of the nitrogen. The denitrification efficiency can be improved and the denitrification effect can be strengthened on the premise that the floor area of a sewage treatment facility is not increased or the floor area is increased as little as possible.

The invention relates to the technical field of sewage processing, and concretely relates to a lithium battery waste liquid treatment technology. The treatment technology comprises the following steps: 1) electrochemical treatment: introducing the lithium battery waste liquid in an electrochemical treatment system for electroflocculation; 2) AOAO treatment: introducing the lithium battery waste liquid after coagulating sedimentation in a first anoxic pool, an aerobic pool, a second anoxic pool and a MBR membrane bioreactor in order; and 3) denitrification and nitrification: introducing the lithium battery waste liquid after AOAO treatment in a denitrification pool for a denitrification reaction and a nitrification aerated biofilter for a nitrification reaction in order, wherein a first back flow pipe to the first anoxic pool can be arranged at the MBR membrane bioreactor, and a second back flow pipe to the denitrification pool can be arranged at the nitrification aerated biofilter. After the lithium battery waste liquid is subjected to the above treatment processes, the discharged waste liquid accords with a national standard requirement of GB30484-2013, and the denitrification rate is greatly increased.

The invention discloses a method for treating sludge digestion liquid by coupling short-cut nitrification / anaerobic ammonia oxidation-fermentation with short-cut denitrification / anaerobic ammonia oxidation and a device thereof, and belongs to the field of biochemical treatment of sludge digestion liquid. The method comprises the following steps: after sludge digestion liquid enters an SBR, removing organic matters in raw water and residual nitrate nitrogen in the last period through heterotrophic bacteria and denitrifying bacteria by adopting a pre-anoxic / aerobic / anoxic operation mode, removing part of total nitrogen in the raw water through ammonia oxidizing bacteria and anaerobic ammonium oxidizing bacteria on a biological membrane, and enabling an effluent to enter a UASB reactor, and further reducing the total nitrogen in the effluent through the combined action of hydrolytic acidification bacteria, denitrifying bacteria and anaerobic ammonium oxidation bacteria in the granular sludge. According to the invention, an additional carbon source is not needed, the aeration energy consumption is saved, the emission of greenhouse gases can be reduced, the problem of unstable denitrification effect of the system caused by easy loss of anaerobic ammonia oxidation sludge is solved by utilizing the biological membrane and the granular sludge, the denitrification load and stability of the system are improved, and the deep denitrification of the sludge digestion liquid and the reduction and recycling of the sludge are realized.

The invention discloses a device and method for treating advanced landfill leachate by short-cut nitrification / anaerobic ammonia oxidation / short-cut denitrification-anaerobic ammonia oxidation process, and belongs to the field of biological treatment of high ammonia nitrogen sewage sludge. The advanced landfill leachate firstly enters a PN-SBR, and all ammonia nitrogen in the feed water is oxidized into nitrite nitrogen; the discharged water containing the nitrite nitrogen and a part of the advanced landfill leachate together enter an AMX-SBR for denitrification by anaerobic ammonia oxidation; AMX-SBR effluent containing the nitrate nitrogen and the other part of the advanced landfill leachate and an additional carbon source are together pumped into a DEAMOX-UASB reactor, the nitrate nitrogen is reduced to nitrite nitrogen by short-cut denitrifying bacteria first, and further deep removal is completed through anaerobic ammonia oxidation; by the novel biological denitrification process, the problems of low denitrification efficiency and high effluent TN of the advanced landfill leachate are solved, and the consumption of the additional carbon sources is reduced; the process is flexible and changeable and easy to regulate and control, and is suitable for deep removal of high-ammonia-nitrogen wastewater.

The invention provides a device and method for deep denitrification of domestic sewage through the combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification anaerobic ammonium oxidation, belonging to the field of biological treatment of sewage. The device comprises an excess sludge fermentation cylinder, a sludge-water separator, a raw water tank, an intermediate water tank, two sequencing batch SBR reactors, an air compressor, a peristaltic pump, and the like. The method comprises the following steps: add domestic sewage into thefirst sequencing batch reactor, and removing all the ammonia nitrogen and the most of total nitrogen through simultaneous nitrification and denitrification in an intermittent aeration mode; and allowing discharge water of the previous step and sludge fermentation broth obtained after sludge-water separation to enter the second sequencing batch reactor, and removing left nitrite and nitrate nitrogen through coupled short-range denitrification-anaerobic ammonium oxidation so as to eventually realize deep denitrification of domestic sewage. The device and method of the invention are applicable to low-C / N urban domestic sewage, and can reduce aeration amount and energy consumption, homogenize the concentrations of organic matters in the domestic sewage, slow down the consumption speed of organic matters, improve nitrogen removal efficiency and realize recycling of excess sludge.

The invention relates to an advanced treatment process of urban domestic sewage, and belongs to the technical field of water environment recovery. The treatment process comprises the following steps: taking effluent after the urban domestic sewage is subjected to dephosphorizing and removing organic matter through A / O as raw water, firstly using an SBR (Sequencing Batch Reactor) for carrying out whole course nitrosation, then mixing nitrosation technology water inflow which is the effluent after dephosphorizing and removing organic matter through A / O with nitrosation technology effluent according to certain proportion to fit the up-flow anaerobic ammonia oxidation biological filter, and processing the autotrophic nitrogen removal to enable the obtained effluent after the urban domestic sewage is subjected to the advanced treatment to satisfy national primary standard A. Therefore, the advanced treatment process has the advantages that contradictions such as carbon source insufficiency and great dissolved oxygen requirement difference, encountered when the dephosphorization technology and denitrification technology are disposed in the same reactor, can be effectively solved; and the efficient low carbon disposition and regeneration of the sewage can be realized.

The invention relates to a segmented water feeding and coupling integrated anaerobic ammonium oxidization SBBR further denitrification control system, which belongs to the field of sewage biological treatment. The segmented water-inlet coupling integrated anaerobic ammonium oxidization SBBR further denitrification control system comprises an urban sewage water tank, an SBBR reactor, a PLC controlcabinet and a computer. The urban sewage is pumped into the SBBR reactor, after the primary water feeding, denitrification bacteria use organic matters in the sewage to remove residual nitrite nitrogen and nitric nitrogen in the reactor, and the remaining organic matters are stored in a bacterial body to synthesize an internal carbon source; and after the reaction is ended, the aeration is startedto perform the integrated anaerobic ammonium oxidization denitrification. After the aeration is ended, the water is fed secondarily, the nitric nitrogen generated by virtue of the anaerobic ammoniumoxidization reaction is removed by virtue of denitrification, and the internal carbon source is stored, after the reaction is ended, the aeration is performed again to remove the ammonia nitrogen in the secondarily fed water, and the nitric nitrogen is generated. After the secondary aeration is completed, the stored internal carbon source is used for performing the denitrification so as to furtherreduce the nitrogen concentration in the outlet water. The segmented water feeding and coupling integrated anaerobic ammonium oxidization SBBR further denitrification control system, can realize thefurther denitrification of the urban sewage with low carbon-nitrogen ratio, and is simple in operation, and capable of saving the energy and reducing the consumption.

The invention provides a green roof partition type multilevel AO integrated wastewater treatment technology. A three-level A / O integrated treatment tank with a modified artificial wetland on the top of the tank is adopted. The technology comprises the following steps: guiding wastewater into a regulating reservoir for homogenizing; treating by guiding the wastewater to flow by a first-level A1 / O1treatment tank, a second-level A2 / O2 treatment tank and a third-level A3 / O3 treatment tank in turn; adopting a real-time fine regulation and control system for real-time monitoring and remote control:adopting a DO and pH monitor and an ORP monitor for monitoring internal state of treatment tank in real time, adopting a NH4+-N sensor, a NO3--N sensor and a TP sensor for monitoring effluent qualityof each-level treatment tank, transmitting the collected signals to a PLC control system, calculating real-time control variable according to a running procedure and online controlling the running state of system. The technology provided by the invention adopts a multilevel AO integrated process, requires no backflow of mixed liquid and has the advantages of less floor area, low investment, simple and flexible running, low energy consumption, high efficiency, convenience in maintenance, and the like.

The invention relates to a process for treating municipal sewage through excess sludge fermentation carbon source enhanced denitrifying phosphorus removal-partial short-cut denitrification-anaerobic ammonia oxidation, belonging to the field of municipal sewage treatment and recycling. A reaction device used in the invention is composed of a raw water tank, an SBR1 reactor, an SBR2 reactor, an SBR3 reactor and an intermediate water tank. The operation mode of the SBR2 is water feeding / fermented material feeding / anaerobic stirring / anoxic stirring / aerobic aeration; and after raw water enters the SBR2, a sludge fermented material from the SBR1 is fed, and then the raw water enters an anaerobic section. Microorganisms synthesize an internal carbon source by utilizing COD in municipal sewage and volatile fatty acid (VFAs) in a fermentation product, and excessively release phosphorus in cells. Then, the nitrate nitrogen-containing effluent of the SBR3 enters the SBR2, the effluent of the SBR2 enters an anoxic section, and the microorganisms perform a denitrification phosphorus removal-short-cut denitrification-anaerobic ammonia oxidation reaction by using the internal carbon source. Finally, the effluent of the SBR2 enters an aerobic section. According to the invention, sludge reduction can be realized, sludge treatment cost is reduced, and the process is suitable for advanced treatment of municipal sewage with low COD / N and low B / C.

The invention belongs to the technical field of biological sewage treatment, and relates to a sewage autotrophic nitrogen removal device and method. Sewage enters a short-cut nitrification anaerobic ammonia oxidation coupled denitrification nitrogen removal IFAS reactor, low-oxygen aeration stirring is firstly carried out, ammonia oxidizing bacteria utilize ammonia nitrogen in inlet water to carryout short-cut nitrification reaction under a low-oxygen condition, and nitrite nitrogen is generated; then aeration is stopped, an anoxic stirring stage is entered, the activity of nitrite oxidizingbacteria isinhibited by adopting an intermittent aeration mode, and conditions are created for self-generation of anaerobic ammonia oxidizing bacteria; residual ammonia nitrogen and nitrite nitrogen in the sewage are subjected to anaerobic ammonia oxidation reaction by the successfully-generated anaerobic ammonia oxidizing bacteria to generate nitrogen and a small amount of nitrate nitrogen, and the residual nitrate nitrogen can be utilized by denitrifying bacteria and is subjected to denitrification reaction to generate nitrogen, so that deep removal of total nitrogen and organic matters in the system is realized; the device is simple in structure, convenient to operate, free of additional carbon source and anaerobic ammonia oxidation sludge inoculation, energy-saving, emission-reducing,economical and efficient.

The invention relates to a constructing method of an autotrophic denitrification system for low-concentration ammonia nitrogen sewage. A sequencing batch type constructed wetland and a sequencing batch type anaerobic biofilm two-stage reactor are adopted. The method includes a step of feeding tail water from a sewage plant at 15-30 DEG C to the sequencing batch type constructed wetland firstly, and performing a cyclic process comprising water feeding, reacting, water discharging and venting to allow the constructed wetland to be idle in order at 15-30 DEG C so that a stable short-range nitrosation system for the low-concentration ammonia nitrogen sewage is constructed by utilizing a restricted oxygen providing characteristic of the constructed wetland; and a step of feeding water discharged from the constructed wetland into the sequencing batch type anaerobic biofilm reactor, and performing a cyclic process comprising water feeding, reacting and water discharging in order at 15-30 DEG C with a combined filler being disposed in the reactor and the biofilm forming density being 50-60% so that an anaerobic ammonia oxidation system for the low-concentration ammonia nitrogen sewage is constructed. Through the two systems, deep autotrophic denitrification of the low-concentration ammonia nitrogen sewage is achieved. The method is efficient, stable, low in energy consumption, short in process, low in investment and low in running cost.

The invention discloses a device and method for realizing urban domestic sewage treatment through plug flow integrated partial nitrification / anaerobic ammonium oxidation by using dissolved oxygen gradient control method, and belongs to the field of the sewage biological treatment. An anaerobic fermentation UASB reactor converts partial organic substances in the domestic sewage into the methane toremove; and then the effluent enters a plug flow integrated partial nitrification / anaerobic ammonium oxidation biological membrane reactor, and the nitrogen in the sewage can be efficiently removed through a dissolved oxygen gradient control way. The microorganisms in the reactor are effectively persisted by using the biological membrane, the anti-impact load is strong, and the production of the residual sludge is reduced; and the partial nitrification / anaerobic ammonium oxidation integration process way is in favor of competing dissolved oxygen by the AOB and the NOB, the growth of the NOB isinhibited, and the nitrification reaction is effectively controlled at the nitrite stage. The system disclosed by the invention is simple for operation and high in self-controlling capacity; the aeration quantity in the plug flow reactor is gradually reduced along the pushing of the water flow, the energy source can be effectively utilized, and the urban domestic sewage can be efficiently denitrified through the partial nitrification / anaerobic ammonium oxidation integration.

The invention discloses a short-cut nitrification and anaerobic ammonia oxidation integrated-endogenous short-cut denitrification and anaerobic ammonia oxidation integrated domestic sewage treatment process and belongs to the field of biological sewage treatment. Involved devices mainly comprise a water inlet tank, a first SBBR, a second SBBR, two middle water tanks and a water outlet tank. Domestic sewage firstly enters the first No.1 SBBR for anaerobic stirring to store an internal carbon source; an effluent enters a the second SBBR for synchronous short-cut nitrification anaerobic ammonia oxidation reaction, most ammonia nitrogen is removed, and nitrate nitrogen and nitrogen are generated; and then the effluent enters the first SBBR again for synchronous endogenous short-cut denitrification anaerobic ammonia oxidation reaction to generate a small amount of nitrate nitrogen and nitrogen. Advantages of organic matters in the domestic sewage and the anaerobic ammonia oxidation reactionare fully utilized, high efficiency and energy saving are realized, and deep denitrification of the domestic sewage can be realized.

The invention relates to a vertical flow constructed wetland sewage treatment device and system. The vertical flow constructed wetland sewage treatment device comprises a vertical flow wetland unit and a water level adjusting unit, a filler matrix is arranged in the vertical flow wetland unit, a water distribution pipe is arranged above the filler matrix, and a water collecting pipe is arranged at the bottom of the filler matrix; a partition wall is arranged in the adjusting unit, a containing cavity is formed between the partition wall and the side wall of the vertical flow wetland unit, and one end of the water collecting pipe penetrates through the side wall of the vertical flow wetland pool and extends to the bottom of the containing cavity, so that sewage treated by the filler matrix flows into the containing cavity; an overflow structure for adjusting the highest liquid level of the vertical flow wetland is arranged on the partition wall, so that the highest liquid level of the vertical flow wetland is not smaller than the top surface of the filler matrix, or the highest liquid level of the vertical flow wetland is flush with the top surface of the saturated layer of the filler matrix. The highest liquid level in the filler matrix can be adjusted through the overflow structure, and a microbial nitrification-denitrification environment is created so that deep nitrogen removal of tail water is realized.

The invention discloses a BAFMBfR coupled low C / N sewage deep denitrification device and denitrification method, and relates to a deep denitrification device and denitrification method. The inventionaims to solve the problems of insufficient sewage carbon source extraction, high treatment cost and poor denitrification effect in the existing sewage treatment process. The device is composed of a microbial electrolytic tank, a nitrification tank and a denitrification tank. The method comprises the following steps: an electrolyte is injected into the microbial electrolysis cell, wherein a hydrogen evolution reaction occurs at the cathode in the microbial electrolysis cell to generate hydrogen; effluent of the microbial electrolysis tank enters a nitrification tank, hydrogen is diffused into adenitrification tank through a hollow fiber membrane, and sewage treated in the denitrification tank is discharged. According to the method, the investment of an external carbon source is not needed,the operation cost is reduced, the risk of secondary pollution is avoided, sludge reduction is realized, and the total nitrogen removal rate is remarkably increased. The method is suitable for sewagedenitrification.

The invention relates to the field of water treatment, in particular to a biological nitrogen and phosphorus removal method and system for sewage. The method comprises the following steps: 1) performing anaerobic treatment on a to-be-treated water body; 2) carrying out anoxic treatment on the water body obtained by anaerobic treatment; 3) carrying out aerobic treatment on the water body obtained by anoxic treatment; 4) carrying out oxygen elimination treatment on the water body obtained by aerobic treatment; 5) refluxing a part of supernatant of the water body obtained by oxygen elimination treatment to the step 2) for anoxic treatment; 6) carrying out membrane-based biological treatment on part of supernatant of the water body obtained by oxygen elimination treatment; 7) carrying out precipitation treatment on a lower-layer mud-water mixture of the water body obtained by the oxygen elimination treatment; 8) refluxing part of the water body obtained by the membrane-based biological treatment to the step 1) for anaerobic treatment; and 9) refluxing part of the water body obtained by the membrane-based biological treatment to the step 3) for aerobic treatment. The method is good in removal effect of total nitrogen and total phosphorus pollutants, simple and convenient to operate, low in energy consumption and stable in up-to-standard emission.

The present invention relates to a high dry point heavy distillate oil hydrotreating method. According to the method of the present invention, high dry point heavy distillate oil and hydrogen gas are mixed and then enter a first-stage reaction zone to carry out a hydrotreating reaction; the first-stage reaction zone effluent is subjected to gas-liquid separation to obtain a liquid phase, the liquid phase and hydrogen gas enter a second-stage reaction zone to carry out a hydrotreating reaction, and the second-stage reaction zone uses a hydrorefining catalyst; and the second-stage reaction zone effluent enters a separation system to obtain the hydrotreating reaction product. Compared with the hydrotreating technology in the prior art, the method of the present invention has the following advantages that: the product quality and the processing capability of the device can be substantially improved, or the operating pressure can be reduced and the operating cost can be reduced under the same product quality and processing capability condition.