40results about How to "Improve nitrogen and phosphorus removal capacity" patented technology

The invention provides a wastewater treatment process and system. The process comprises the following steps: a, performing anaerobic and aerobic treatment on wastewater in sequence to obtain first muddy water mixed liquor, wherein sludge age in the anaerobic and aerobic treatment is 0.5 to 5 days, and the waterpower stay duration is 0.5 to 3 h; b, performing sedimentation on the first muddy water mixed liquor to obtain first sludge and supernate; c, performing anaerobic and aerobic treatment on the supernate in sequence to obtain second muddy water mixed liquor; reacting the second muddy water mixed liquor and a coagulant, and performing sedimentation on obtained reaction liquid to obtain second sludge and effluent; enabling part of the first sludge to flow back and take part in anaerobic treatment; performing hydrolytic acidification on the other part of the first sludge to obtain fourth muddy water mixed liquor; conveying part of the fourth muddy water mixed liquor to take part in anaerobic treatment. The process is free of additional carbon sources, and has a higher nitrogen and phosphorus removal capacity; the system is small in occupied area; the energy self-sufficiency rate of a sewage treatment plant is greatly improved; the resource recovery rate is high; residual sludge output is lower.

The invention discloses a method and a device for biological ecological assemblage for sewage purification and recycling. The method comprises the following steps: A. sewage to be treated passes through a grate/regulating reservoir, and large particulate materials are removed; B. the sewage treated in step A is pumped into an integral membrane bioreactor, and permeates a membrane when pumped by a pump; C. the sewage treated in step B flows into an intermediate water reservoir; and D. the sewage flowing out in step C enters into a composite vertical current manual wetland by graded means. The device comprises four units: the grate/regulating reservoir, the integral membrane bioreactor, the water reservoir and the composite vertical current manual wetland, wherein various units are connected through pipes and controlled by valves. Bypass pipes are arranged on outlets of the various units of the grate/regulating reservoir, the integral membrane bioreactor, the water reservoir and the composite vertical current manual wetland, and combined modes of series connection, shunt connection and parallel connection of the integral membrane reactor and the composite vertical current manual wetland are realized by adjusting valves, so that the method is easy, is simple and convenient to operate, has high operation efficiency and low cost, and realizes sewage purification and direct recycling.

The invention discloses a method for remediating pond water in situ. The method comprises the following steps: suspending a surface aeration system and a BC biological reaction system in water from top to bottom in sequence, wherein the surface aeration system is used for rising and diffusing water, and the BC biological reaction system is used for immobilizing microorganisms; performing rising movement on the water from the lower part of the water under the action of rising force provided by the surface aeration system; passing the water through the BC biological reaction system, and activating immobilized microorganisms in the BC biological reaction system by nutrient substances in water to breed; pushing out the rising water body by the surface aeration system, and circulating the water to the bottom of the pond under the action of water flow density difference. The method for in-situ remediating pond water disclosed by the invention has the advantages that the starting is quick, the needed remediating time is short, the concentration of the microorganisms is high, the bottom sludge is synchronously degraded, the process operation is simple, the energy consumption is low, the secondary pollution is avoided and the remediating effects are stable.

The invention discloses a microbial electrochemical coupling membrane bioreactor system and a sewage treatment method. The system comprises an airlift circulation type membrane bioreactor, a microbialelectrochemical device and a nitrogen and phosphorus recovery area. The airlift circulation type membrane bioreactor comprises a plurality of airlift circulation type membrane bioreactor units; eachairlift circulation type membrane bioreactor unit comprises an anoxic zone, an anaerobic zone and an aerobic zone; the microbial electrochemical device comprises an anode electrode, a cathode electrode and an external circuit for connecting the cathode and the anode; and the nitrogen and phosphorus recovery area comprises an anion exchange membrane, a cation exchange membrane and an area between the anion exchange membrane and the cation exchange membrane. The system not only has the efficient sewage treatment and solid-liquid separation capabilities of the airlift circulation type membrane bioreactor to reduce the sludge backflow energy consumption, but also combines the characteristics of anaerobic and aerobic region distribution of a circulation system, and the overall nitrogen and phosphorus removal capability is enhanced by coupling a microbial electrochemical system, thereby further improving the effluent quality.

The invention provides a wastewater treatment process and system. The process comprises the following steps: a, performing anaerobic and aerobic treatment on wastewater in sequence to obtain muddy water mixed liquor, wherein sludge age in the anaerobic and aerobic treatment is 0.5 to 5 days, and the waterpower stay duration is 0.5 to 3 h; b, performing sedimentation on the muddy water mixed liquor obtained in the step a, so as to obtain supernate and sludge; c, performing anaerobic ammonia oxidation on the supernate obtained in the step b, and separating obtained muddy water mixed liquor to obtain supernate and sludge; d, mixing the supernate obtained in the step c and a coagulant, and performing sedimentation on obtained reaction liquid to obtain sludge and effluent. The process is free of additional carbon sources, and has a higher nitrogen and phosphorus removal capacity. Test results show that after wastewater is treated by the process, SS is 5 to 10 mg/L, COD is 30 to 46 mg/L, TN is 9 to 13 mg/L, and TP is 0.3 to 0.5 mg/L.

The invention discloses a three-dimensional biological rotating disc which comprises a box body; a speed reducer and a gear box are arranged outside the box body; the speed reducer and the gear box are connected with each other by a bearing, and are used for adjusting and controlling the rotating speed of rotating disc modules arranged in the box body; a storage clapboard is welded between the rotating disc modules; three-dimensional filler is filled between the outer side of the storage clapboard and the rotating disc modules; and a water inlet and a water outlet are respectively formed in the two sides of the bottom of the box body. According to the three-dimensional biological rotating disc, the thickness and the concentration of a biological film on the biological rotating disc are greatly increased, so that the equipment size and the investment of the biological rotating disc are greatly reduced under the same processing scale; furthermore, after a special packing way is adopted, an anaerobic state and an oxygen deficit state can be easily formed in the biological rotating disc, so that the denitrification processing capacity of a system is improved; and the aged biological film on the surface of the filler can rapidly fall off and is updated, so that the treatment efficiency of the whole system is greatly improved.

The invention discloses assembled sequencing batch fluidized bed sewage treatment equipment. The equipment comprises a shell and is characterized in that the shell is an assembled tank body; an umbrella-shaped inner shell is arranged inside the shell; the interior of the umbrella-shaped inner shell is a reaction zone; a settling zone is arranged between the shell and the umbrella-shaped inner shell; suspended fillers suspend in the reaction zone; an aeration device is arranged at the bottom of the reaction zone; a filler isolating net is arranged between the reaction zone and the settling zone; the reaction zone is connected with a water inlet pipe; a water outlet pipe is arranged at the upper part of the shell; a water decanter is arranged in the settling zone; a water outlet of the water decanter is connected with the water outlet pipe. The invention also comprises a process for treating sewage by adopting the equipment. The sewage treatment equipment and the sewage treatment process have the advantages of short construction cycle, investment saving, low energy consumption, low operating cost, strong impact resistance load capacity, good treatment effect, strong nitrogen and phosphorus removal capacity, convenience in operation management, high degree of automation, no noise, flexible assembly and the like.

The invention discloses a combined type multifunctional deep nitrogen and phosphorus removal artificial wetland system for tail water. The system includes a hydrolyzed acidification zone (1), a biomass filling material placement zone (2), a denitrification wetland area (3), a nitrification wetland area (4), a denitrification wetland area (5) and an enhanced phosphorus removal zone (6). Tail waterenters the hydrolyzed acidification zone (1) to be in contact with a biofilm colonization combined filling material, so that the nitrogen and phosphorus elements in the tail water can be effectively utilized; the tail water enters the biomass filling material placement zone (2) through a diversion groove, and the filling material can release organic matters to provide favorable conditions for follow-up denitrification; the denitrification wetland area (3) and (5) adopt enclosed top covers which can provide anoxic environments for microorganisms; and the high calcium fly ash ceramsite and ferro-iron composite filling material in the enhanced phosphorus removal zone (6) can effectively remove phosphorus. The system can effectively solve the contradiction of the demands of the removing of phosphorus and nitrogen in tail water on carbon sources; the system is not easy to block, and is good in effluent water quality and less in investment; and effects of beautifying landscapes can be achieved by cooperatively planting water plants.

The invention discloses a biological stuffing fixed type HMBR process aeration tank. A plurality of guide walls are arranged in an aeration tank; membrane modules are arranged between the guide wallsand tank walls; an external self-priming pump is connected with the membrane modules; an aeration head is arranged under the membrane modules; a sludge discharging pipe is arranged on the bottom of the aeration tank; the fixed biological stuffing is arranged in the aeration tank; raw water is pumped into the aeration tank by a raw water pump through a grating. The invention has the beneficial effects that the aeration tank has high capacity of removing nitrogen and phosphorus and excellent dredging effect.

The invention relates to the technical field of sewage treatment and in particular relates to a household sewage treatment process. The process treats sewage by way of a pre-posed anoxic pond and a post-posed anoxic pond without supplementing a carbon source. The process has a relatively high nitrogen and phosphorus removal ability, and meanwhile, the reflux ratio of a reflux liquid is greatly reduced by the process, so that a lot of cost is lowered. In addition, the process also solves the problem of organic matter degradation and phosphorous removal efficiency caused by sludge age.

The invention particularly relates to a double-filler coupled sewage biological treatment method, belonging to the technical field of sewage treatment in environmental engineering science. According to the method, two biological fillers with different action mechanisms are added into a reactor of an SBR sewage treatment system to generate the double-filler coupled biological treatment effect, thereby increasing and enriching the biomass and the species of various microbial florae, and constituting the relatively stable composite biological treatment system in which attached-growth microbes and suspended-growth activated sludge coexist; and under the biochemical actions of the humic biological filler, the suspended-growth common activated sludge in the SBR system is converted into humic activated sludge with higher nitrogen and phosphorus removal capacity and lower sludge proliferation speed. The method is simple and feasible, has the advantages of lower investment and obvious effects, is capable of improving the properties of the activated sludge in the treatment system, enhancing the sewage treatment effect and lowering the sludge yield, and effectively inhibits the odor of the sludge on the premise of implementing in-situ sludge reduction.

Integrated water treatment equipment comprises a septic tank, a filtration tank and a discharging system, which are all installed below the ground surface with bottoms arranged on a prefabricated concrete slab. One side of the septic tank is provided with a water inlet pipe, and the upper part of the other side is connected to the filtration tank through a connecting pipe. The septic tank and the filtration tank both comprise a tank, a stiffener at the outside of the tank and a ventilating window at the top of the tank. The tank of the septic tank is divided into two septic chambers. A three-way pipe is arranged above a separator plate between the two septic chambers. A flow deflector is vertically arranged above the septic chambers. There is a gap between the flow deflector and the bottom of the tank. A filter, a chlorine dioxide water-purifier and a back-flusher are arranged inside the filtration tank. One side face of the filtration tank is connected to the discharging system. The invention has the following advantages and beneficial effects: the equipment meets special requirements of water treatment systems in remote areas on space and region, and installation trend and standardization of water treatment technology are realized.