134 results about "Aerobic reaction" patented technology

The invention relates to the technical field of sewage treatment, and discloses integrated sewage treatment equipment and technology.The integrated sewage treatment equipment comprises an aerobic reaction tank, an aeration tank and a clean water tank, a membrane assembly is arranged in the aeration tank, an aeration assembly is arranged at the bottom of the membrane assembly, and a lifting seat is vertically and slidably connected to a fixing frame of the membrane assembly; a plurality of aeration flow guide parts are linearly arranged on the top surface of the lifting seat at equal intervals, a suspension mechanism is arranged on the bottom surface of the lifting seat, each aeration flow guide part comprises a flow guide plate fixedly connected with the lifting seat, clamping plates are connected to the two symmetrical sides of each flow guide plate, and a plurality of flow guide grooves are formed in the sides, opposite to the clamping plates, of the flow guide plates. The air bag is inflated through the residual pressure of the air supply equipment, the lifting seat is driven to intermittently ascend and descend, the flow guide plate guides the bubbles through the inclined surface in the vertical movement process, the bubbles are gathered in the flow guide holes, and therefore the scouring force of the bubbles on the surfaces of the membrane filaments is improved, contact type cleaning is avoided, and the service life of the membrane filaments is prolonged.

The utility model discloses a domestic sewage treatment device based on automatic oxygenation, which comprises a first treatment tank and a second treatment tank, an anaerobic reaction tank and an aerobic reaction tank are arranged in the first treatment tank, the upper ends of the anaerobic reaction tank and the aerobic reaction tank are open, and the anaerobic reaction tank is filled with spherical anaerobic materials and is used for performing anaerobic digestion treatment on organic matters in sewage; the aerobic reaction tank is arranged at the periphery of the anaerobic reaction tank, and the aerobic reaction tank is filled with aerobic combined filler and is used for carrying out oxygenolysis treatment on sewage subjected to anaerobic digestion treatment by the anaerobic reaction tank; a water distribution oxygenation plate is arranged at the top end of the aerobic reaction tank; the second treatment tank is communicated with the aerobic reaction tank through a pipeline, and a dephosphorization composite filler is arranged in the middle of the second treatment tank and is used for dephosphorizing and precipitating the sewage subjected to oxygenolysis treatment. According to the domestic sewage treatment device disclosed by the utility model, automatic oxygenation is realized by adopting an unpowered high-efficiency oxygenation technology, and meanwhile, the oxygenation efficiency is improved by utilizing a hedging mode that airflow and sewage flow directions are opposite.

The invention discloses a sewage treatment process optimization control method and a sewage treatment process optimization control system. According to the method, in-situ fluorescence detection devices are respectively arranged in an anaerobic reactor, an anoxic reactor and an aerobic reactor of an AAO biochemical sewage treatment system; acquiring NAD (P) H and protein fluorescence signals based on the in-situ fluorescence detection device, and acquiring dissolved oxygen, oxidation-reduction potential, pH value and temperature process parameters of the anaerobic reactor, the anoxic reactor and the aerobic reactor based on conventional monitoring equipment; establishing a microbial activity index quantitative rating model based on the fluorescence signal intensity, the dissolved oxygen concentration and the temperature, and optimizing the sewage treatment process based on the microbial activity value of each reactor; the process parameters are accurately controlled, the operation stability of the system is improved, and the remarkable effects of reducing the energy consumption and reducing the indexes of ammonia nitrogen, total nitrogen and total phosphorus in effluent are achieved.

The water pan comprises a water pan bottom plate and a water pan side baffle extending upwards from the circumferential outer edge of the water pan bottom plate, and a liquid drainage structure communicated with the water pan side baffle and / or the water pan bottom plate is arranged on the water pan side baffle and / or the water pan bottom plate. The water pan side baffle is provided with a water pan sealing ring of an annular structure. According to the water pan suitable for the closestool, the water pan sealing ring of the annular structure is arranged on the water pan side baffle, so that the water pan can effectively prevent water splashing and water bursting, the problem that the humidity of a biodegradation container is too high is solved, the stability of aerobic reaction of a culture medium is guaranteed, and the service life of the culture medium is prolonged. Odor and other peculiar smells of the closestool are avoided, and the health of a user is protected.

The application discloses a kind of bioelectrochemical reactor and the method for processing low concentration wastewater using it, belong to low concentration wastewater treatment technical field.The bioelectrochemical reactor of the application includes reactor top cover and reactor tank body;Gas inlet hole is provided on the reactor top cover, anode, cathode and aeration device are arranged in the reactor tank body, and anode and cathode are connected with external direct-current power supply through titanium wire respectively;Aeration device is connected with gas inlet hole;Anode and cathode are both carbon nanotube modified titanium electrode.When the above-mentioned bioelectrochemical reactor is used to process low concentration wastewater, first, electroactive bacteria are cultivated on the surface of electrode using aerobic sludge, then bioelectrochemical aerobic reaction is carried out, and under aeration condition and low voltage, COD and NH4 + -N removal efficiency can reach more than 95%, electrode corrosion is low, the treatment method is simple and efficient, and no secondary pollution is generated, and has wide application prospect.

The invention discloses a coffee fresh fruit primary processing wastewater treatment process and a wastewater treatment system, and belongs to the technical field of wastewater treatment. The method comprises the following steps: preliminarily filtering coffee processing wastewater; feeding the preliminarily filtered wastewater into a polysaccharide reactor, adjusting the pH value to 7-9, stirring, and flocculating and precipitating to complete pretreatment; s3, carrying out regulation-hydrolytic acidification on the pretreated coffee wastewater, carrying out hydrolytic acidification on macromolecular organic substances in the wastewater, and standing for solid-liquid separation; s4, carrying out oxidation-reduction reaction on the coffee wastewater subjected to hydrolytic acidification treatment; then carrying out anaerobic reaction on the coffee wastewater subjected to the micro-electrolysis reaction to degrade organic matters, and carrying out three-phase separation on solid, liquid and gas; then carrying out an anoxic / aerobic reaction on the coffee wastewater subjected to the anaerobic reaction treatment; and then carrying out ozone / UV catalytic oxidation on the coffee wastewater after the nitrification anoxic / aerobic reaction. According to the method, microelectrolysis and biological treatment processes are combined, the acidic polysaccharide and pectin comprehensive wastewater belongs to high-difficulty wastewater, and pollutants in high-concentration coffee fresh fruit primary processing wastewater are effectively degraded.

The utility model relates to a treatment device for spraying wastewater, in particular to a treatment device for spraying wastewater. The problems of complicated and changeable water quality, high treatment technical difficulty and high operation cost in the existing spraying wastewater treatment are solved. The device is composed of a flocculation sedimentation tank, a pH adjusting tank, a biological reaction tank, an ozone oxidation tank and an activated carbon adsorption tank. The water outlet of the flocculation sedimentation tank is communicated with the water inlet of the pH regulating tank; the water outlet of the pH regulating tank is communicated with the water inlet of the biological reaction tank; a water outlet of the biological reaction tank is communicated with a water inlet of the ozone oxidation tank; a water outlet of the ozone oxidation tank is communicated with a water inlet of the activated carbon adsorption tank. The biological reaction tank is divided into an anaerobic reaction zone, an anoxic reaction zone and an aerobic reaction zone, and a reflux water outlet of the aerobic reaction zone is communicated with a reflux water inlet of the anoxic reaction zone. Through a plurality of functional modules, pollutants such as suspended matters, organic matters and heavy metals in the spraying wastewater are removed.

The utility model discloses a multi-stage sewage treatment tank which comprises a main tank, a first-stage enclosure and a second-stage enclosure, an inner tank cavity and a plurality of sub tank cavities are separated, a sewage one-way circulation structure is arranged among the sub tank cavities, the first-end sub tank cavity is connected with a sewage inlet pipe, the tail-end sub tank cavity is connected with the inner tank cavity through a standby pumping pipeline, and the inner tank cavity is connected with a purified water outlet pipe. The sub-tank cavity at least comprises a primary sedimentation tank, an aerobic reaction tank and the like, and the inner tank cavity is provided with a deep treatment tank. The secondary sedimentation tank is provided with a sludge hopper, the aerobic and anoxic reaction tanks are provided with stirring devices, and the aerobic tank is provided with an aeration device. The main body pool can be rectangular or annular, and the inner pool cavity is consistent with the main body pool in shape and is reduced in equal proportion. The sewage treatment tank is small in occupied area, compact in structure, convenient to maintain, capable of achieving sewage staged treatment and efficiently removing organic matter, suspended solids and nitrogen and phosphorus nutrient substances, capable of meeting the high requirement standard, convenient to configure an automatic control system and accurately controlling the treatment process, suitable for different sewage treatment requirements, especially suitable for urban sewage treatment, and wide in application prospect.

An amino acid wastewater recycling treatment device comprises a pretreatment tank, an anaerobic reactor, an aerobic reactor, a sedimentation tank, a reverse osmosis device and a water storage tank which are sequentially arranged, a water inlet pipeline is installed on the upper portion of one side of the pretreatment tank and externally connected with an amino acid wastewater output pipeline, and a water outlet pipeline is installed on the lower portion of the other side of the pretreatment tank and externally connected with a water outlet pipeline. The water outlet pipeline is communicated with a water inlet of the anaerobic reactor, a water outlet of the anaerobic reactor is communicated with a water inlet of the aerobic reactor, a water inlet and an overflow port are formed in the upper part of the sedimentation tank, a sludge discharge port is formed in the bottom of the sedimentation tank, and a water outlet of the aerobic reactor is communicated with a water inlet of the sedimentation tank; a water inlet of the reverse osmosis device is communicated with an overflow port of the sedimentation tank, the water storage tank is communicated with a water production port of the reverse osmosis device, and a concentrated water port of the reverse osmosis device is communicated with a concentrated water pipeline. The amino acid wastewater treatment device is specially designed for the amino acid wastewater, is favorable for realizing efficient treatment and recovery of the amino acid wastewater, and is environment-friendly.

The invention provides a modular rural sewage-biogas-fertilizer co-production system based on micro-aerobic circulation, which comprises a water distribution unit, a plurality of treatment units and a co-production unit, the water distribution unit comprises a distribution box and a plurality of partition plates fixedly connected with the inner wall of the distribution box, the plurality of partition plates divide the distribution box into a plurality of water storage areas, and the water storage areas are communicated with the treatment units. The water storage areas are provided with preset water levels, and the partition plates are provided with through grooves for communicating the two adjacent water storage areas at the elevation positions of the preset water levels. The treatment units are communicated with the water storage areas in a one-to-one correspondence mode, valves are arranged at the communication positions of the treatment units and the corresponding water storage areas, and the treatment units conduct hydrolytic acidification treatment, micro-aerobic reaction treatment and biological treatment on sewage flowing out of the corresponding water storage areas in sequence; the co-production unit comprises a gas collection module and a fertilizer preparation module, the gas collection module is used for collecting biogas generated by the treatment unit, and the fertilizer preparation module is used for preparing redundant sludge of the treatment unit into biochar. The working pressure of the sewage treatment system is reduced when the water consumption is increased suddenly.

The invention discloses a nested self-phase heat exchange type anaerobic-aerobic-anoxic combined reactor which comprises an anaerobic reactor, an anoxic reactor and an aerobic reactor, the anaerobic reactor is located at the center of the reactor, the aerobic reactor sleeves the surface of the anaerobic reactor, the anoxic reactor sleeves the surface of the aerobic reactor, and the anoxic reactor sleeves the surface of the aerobic reactor. And the surface of the anaerobic reactor is fixedly sleeved with a thermal insulation layer. The sewage treatment equipment has the advantages of energy conservation and environmental protection, and solves the problems that in the using process of existing sewage treatment equipment, heat energy of an aerobic reactor is inconvenient to recycle and is used for heating an anaerobic system, energy waste is easily caused, and the environmental protection property of the sewage treatment equipment is reduced.

The application discloses high-efficiency aerobic granular sludge and a preparation method and application thereof, and belongs to the technical field of biological wastewater treatment. The application provides high-efficiency aerobic granular sludge and a preparation method thereof. The granular sludge is prepared by taking dewatered sludge with a water content of 60-75% in a wastewater plant as a raw material, and through steps of mud cake crushing, particle size screening, specific gravity air selection and elutriation activation, and has different particle sizes, a specific gravity of 1.04-1.10, a sphericity coefficient of 0.75-0.95, a consistency of 0.50-0.65 and a diameter distance of 1.05-1.50, so that the AGS system can be rapidly started. The high-performance granular sludge can be prepared only by simple processing operation. It has been verified that the granular sludge prepared by the application is added to an aerobic reactor, which helps to achieve the target requirements of rapid starting and stable operation of the AGS system.

The invention belongs to the technical field of biological membranes for water pollution control, and discloses an integrated continuous two-stage anoxic / aerobic MBBR (Moving Bed Biofilm Reactor) which comprises a cylindrical shell provided with a water inlet, a water outlet and a reflux inlet, the interior of the cylindrical shell is divided into four areas A1, O1, A2 and O2, and the four areas A1, O1, A2 and O2 are respectively used as containers of a pre-anoxic MBBR, a pre-aerobic MBBR, a post-anoxic MBBR and a post-aerobic MBBR; the top heights of the water retaining partition plate between the O2 area and the A2 area, the water passing partition plate between the A1 area and the O1 area, the water passing partition plate between the O1 area and the A2 area and the water passing partition plate between the A2 area and the O2 area are sequentially reduced, and the flowing direction of water flow from the A1 area to the O1 area to the A2 area to the O2 area is formed. The method can be used for treating high NH4 < + >-N concentration (gt; the device is simple in structure and convenient to disassemble and assemble, the area and the space can be effectively utilized, and a novel strategy is provided for improving the efficiency of a sewage treatment plant for treating sewage with high NH4 < + >-N concentration.

The application discloses an electrolytic catalytic biological denitrification reactor and relates to the technical field of sewage treatment. The electrolytic catalytic biological denitrification reactor comprises a reactor body, an external power supply connected to the reactor body, an anaerobic reaction chamber and an aerobic reaction chamber separated by a first partition wall in the inner cavity of the reactor body, and a first drainage hole formed in the first partition wall. A water inlet is formed in the outer side wall of the anaerobic reaction chamber. A unit cathode and a water flow propeller are fixed in the anaerobic reaction chamber. A water outlet is formed in the outer side wall of the aerobic reaction chamber. A unit anode and a water flow propeller are fixed in the aerobic reaction chamber. The unit anode and the unit cathode are connected in parallel through wires, and the wires are connected to the external power supply. The electrolytic catalytic biological denitrification reactor can effectively improve the biological denitrification efficiency, reduce the pollution to the environment, has strong adaptability to water quality changes, has good sludge settling performance, is easy to maintain, manage and operate, has high denitrification efficiency, and has small land occupation.

The utility model relates to composite clean water treatment equipment which comprises an anaerobic reaction tank, an anoxic reaction tank, an aerobic reaction tank, a sedimentation tank, a primary filter tank, an MBR (Membrane Bioreactor) membrane tank and a clean water tank which are communicated in sequence, sewage in the anaerobic reaction tank enters the anoxic reaction tank from bottom to top after reaction; sewage degraded by microorganisms in the anoxic tank flows into the aerobic reaction tank from bottom to top; sewage reacted in the aerobic reaction tank enters a sedimentation tank from bottom to top; after the sewage in the sedimentation tank is settled, clear water enters the primary filter tank to be filtered, and the sewage flows back to the anaerobic reaction tank to be filtered again; sewage in the primary filter tank is sequentially filtered, adsorbed and purified by a volcanic rock layer, a quartz sand layer and a bamboo charcoal layer from top to bottom and then enters the MBR membrane tank, water in the MBR membrane tank is filtered by an MBR membrane and then enters the clean water tank, and water in the clean water tank is disinfected, sterilized, decolorized and deodorized by ozone and then is used for circularly flushing a toilet. The equipment is efficient in sewage COD (Chemical Oxygen Demand) degradation, nitrogen and phosphorus removal and solid-liquid separation effects.

A pretreatment process for anaerobic digestion sludge in a municipal sewage treatment plant, comprising the following steps: Step 1, slurry distribution; Step 2, static thickening; Step 3, slurry flora cultivation; Step 4, primary slurry dewatering; Step 5, secondary slurry dewatering; Step 6, aerobic treatment of slurry; Step 7, alkali treatment of slurry; Step 8, slurry mixing; Step 9, slurry heating; In the present invention, the slurry produced by the sewage treatment plant is divided into two portions. One portion is used to cultivate anaerobic flora in the sludge through a flora cultivation device. The cultivation of anaerobic flora can reduce the sludge digestion gas production time in the digestion tank. The other portion undergoes two-stage dewatering, and the slurry dewatered by the centrifuge undergoes an aerobic reaction to allow the rapid growth of aerobic microorganisms, enabling more microbial cells to be dissolved in the subsequent alkali treatment. The sludge after pretreatment has increased sludge organic matter content, thereby improving the unit gas production rate of the sludge in the digestion tank in the next step.

The utility model relates to a wastewater denitrification and desulfurization treatment device which is characterized in that a water distributor is arranged at the lower part of an anaerobic reaction tank of an anaerobic reactor, a three-phase separator is arranged at the upper part of the anaerobic reaction tank of the anaerobic reactor, and a stirrer is arranged on an anoxic reaction tank of an anoxic reactor; an overflow port of the anaerobic reaction tank is connected and communicated with the anoxic reaction tank, a reflux port of the anaerobic reaction tank is connected and communicated with the anaerobic reaction tank through a wastewater reflux pipe, an aerator is arranged at the bottom of an aerobic reaction tank of the aerobic reactor, the anoxic reaction tank is connected and communicated with the aerobic reaction tank, a partition plate is arranged in the settling pond, a water inlet area is arranged on one side of the partition plate, and a settling area is arranged on the other side of the partition plate. A clear liquid outlet pipe is arranged at the upper part of the inclined plate of the sedimentation tank, a communicated clear liquid return pipe is arranged at the front part of the clear liquid valve of the clear liquid outlet pipe, and the clear liquid return pipe is communicated with the anoxic reaction tank. According to the device, the sulfate radical removal rate is high, nitrate in the wastewater can be simultaneously removed while sulfate radicals in the wastewater are removed, and the equipment investment and the treatment cost are reduced.

The present application relates to sewage biological treatment technology field, disclose a kind of continuous flow aerobic granular sludge rapid formation and stable regulation and control method, device, method is in the peak value window of organic substrate concentration of influent in anaerobic selection area Pulse light stress is applied, trigger microbial stress defense, drive microbial self-aggregation and excrete extracellular polymer substance and form granular precursor;Granular precursor is strengthened after structure in aerobic reaction zone, by two-stage hydraulic screening respectively according to settling performance, density difference separates aggregate, again low-density floc rich in phosphorus-accumulating bacteria is backflowed to anaerobic zone, high-density granules rich in nitrifying bacteria are backflowed to aerobic zone, realize functional flora directional ecological niche adaptation.The present application replaces high-intensity hydraulic shear with light stress to drive granulation, can greatly shorten start-up period, reduce operating energy consumption, inhibit filamentous bacteria expansion from source, realize the significant improvement of simultaneous nitrification and phosphorus removal efficiency.

The invention relates to an advanced treatment method and system for Maotai-flavor liquor wastewater, and belongs to the technical field of wastewater treatment.The advanced treatment method comprises the steps that S1, primary catalytic ozonation treatment is conducted on liquor wastewater obtained after secondary biochemical treatment, and primary catalytic ozonation effluent is obtained; s2, performing biochemical treatment on the primary catalytic ozonation effluent to obtain biochemical effluent; the biochemical treatment is performed according to the series operation of aerobic reaction, anaerobic reaction and aerobic reaction; s3, carrying out secondary ozone catalytic oxidation treatment on the biochemical effluent; and S4, refluxing the secondary catalytic ozonation effluent, mixing the refluxed secondary catalytic ozonation effluent with the primary catalytic ozonation effluent, and repeating the steps S2 and S3. The advanced treatment method provided by the invention can effectively remove refractory organic matters and various forms of nitrogen in the Maotai-flavor liquor wastewater, has a relatively good removal effect on COD, ammonia nitrogen and total nitrogen in the wastewater, and ensures that various indexes of final discharged water stably reach the standard.

The application discloses a flexible lifting cover open inlet and outlet material reactor, which comprises a double-layer flexible cover, a crane support, a top net support, a ring-shaped water seal pool, a high-pressure oxygen increasing machine, a circulating liquid pool, a circulating pump, a discharge pump, a crane and a movable track plate, and is characterized in that the double-layer flexible cover can be automatically lifted, the ring-shaped cover feet around the double-layer flexible cover are sealed by water in the ring-shaped water seal pool, and the ring-shaped cover feet and the double-layer flexible cover around the ring-shaped cover feet are automatically lifted to the upper part by the crane during feeding or slagging, so that the whole reactor around is fully opened and ventilated, safe feeding or slagging is realized, the technical scheme can be used as an aerobic reactor and an anaerobic reactor, the application can be widely applied in the fields of new energy and environmental protection, and is used for degradation treatment of organic waste generated in urban and rural industrial and agricultural production and people's life, and is a new energy and environmental protection device.

This invention provides an apparatus and method for recovering nitrous oxide from high-ammonia-nitrogen wastewater using algae-bacteria symbiotic technology. The apparatus includes an aerobic reaction unit and an anoxic reaction unit; the first outlet of the aerobic reaction unit and the inlet of the anoxic reaction unit are connected, and a monovalent anion exchange membrane is installed at the connection point; the aerobic reaction unit is connected to a first gas collection unit via a first gas outlet, and the anoxic reaction unit is connected to a second gas collection unit via a second gas outlet, for recovering nitrous oxide generated in both the aerobic and anoxic reaction units. This invention, by inoculating the aerobic reaction unit with algae-bacteria symbiotic sludge that achieves short-cut nitrification, effectively reduces the aeration energy consumption of short-cut nitrification through microalgae photosynthesis, realizes the recovery of nitrous oxide in the aerobic reaction unit, reduces the denitrification load in the anoxic reaction unit, increases the denitrification conversion rate, and reduces operating costs, embodying a high-efficiency, low-carbon, and environmentally friendly design concept.

The application discloses a rural energy-saving multistage sewage treatment device, which realizes the flow direction of sewage from a premixing tank-anaerobic reaction tank-oxygen reaction tank by expansion and contraction of the expansion body to realize a positive pressure or a negative pressure state in the anaerobic reaction tank, does not need power equipment, saves power, and has good purification effect through multistage treatment of anaerobic-oxygen. The reflection blocks can increase the expansion degree of the expansion body, and can improve the sewage flow rate and the sewage treatment capacity.

This application relates to a landfill leachate treatment device, belonging to the field of landfill treatment. It includes a filter box containing filter plates. One side of the filter box is connected to an anaerobic reactor via a first outlet pipe. One side of the anaerobic reactor is connected to an aerobic reactor via a second outlet pipe. One side of the aerobic reactor is connected to an activated carbon box via a third outlet pipe. The activated carbon box contains multiple activated carbon plates. This application effectively reduces the impact of impurities in the leachate on the overall treatment process.

The invention relates to an integrated anaerobic-anoxic-aerobic reaction tank which comprises an upper biochemical treatment area and a lower settling area, the biochemical treatment area is cylindrical and comprises an anaerobic area, an anoxic area and an aerobic area from inside to outside, the anaerobic area is of a jacket layer structure and is divided into an inner area and an outer area, wastewater is input into the bottom of the inner area, and wastewater is input into the bottom of the anoxic area; the circulating flow can be realized between the inner area and the outer area; the top of the outer zone is communicated with the anoxic zone, a plurality of circles of guide plates are arranged in the anoxic zone, so that wastewater can flow up and down in the anoxic zone along the guide plates, and the top of the anoxic zone is communicated with the aerobic zone; an overflow weir is arranged on the outermost side of the aerobic zone and is connected with the settling zone through a water outlet pipe; the bottom of the settling zone is connected with the anoxic zone through a return pipe; an anaerobic biochemical cage is arranged in the anaerobic zone and is used for containing anaerobic granular sludge, the loss of a large amount of sludge is avoided, the top of the anaerobic biochemical cage spans the top of the inner zone, and the bottom of the anaerobic biochemical cage spans the bottom of the inner zone, so that the granular sludge can circularly flow between the inner zone and the outer zone in the anaerobic biochemical cage.

The utility model discloses a closestool leakproof dry-wet separation mechanism which comprises a closestool main body and a water pan, a bedpan is arranged on the upper portion of the closestool main body, a discharge channel is arranged at the bottom of the bedpan, and the water pan can be installed on the closestool main body in a mode of rotating in the horizontal direction. The drainage channel is arranged on the water pan, so that the water pan can rotate back and forth between a first position under the drainage channel and a second position outside the drainage channel in the horizontal direction, and the water leakage prevention structure is arranged on the water pan and / or the drainage channel; the water leakage prevention structure can seal the circumferential gap between the top of the water pan and the bottom of the discharge channel, so that the problem that water leaks to the biodegradation container below can be avoided, the humidity of the biodegradation container can be prevented from being too high, the stability of aerobic reaction of a culture medium is guaranteed, peculiar smells such as odor of a closestool are avoided, and the service life of the closestool is prolonged. And the health of the user is protected.

The utility model provides an efficient degassing system for aerobic granular sludge based on internal circulation degassing, which relates to the field of biological sewage treatment and comprises an aerobic reactor and an internal circulation degassing unit, the aerobic reactor is provided with a water inlet and an effluent weir, and an aerator is arranged inside the aerobic reactor; the internal circulation degassing unit comprises a degassing cylinder and a gas collecting cover arranged above the degassing cylinder, a guide cylinder is arranged in the degassing cylinder, the guide cylinder is opened up and down, the upper part of the guide cylinder is an inlet and is connected with an effluent weir through a guide pipe, a guide sheet is arranged in the guide cylinder, and an inclined baffle fixed on the inner wall of the degassing cylinder is arranged on the outer side of the guide cylinder; a water outlet in the upper part of the degassing cylinder is connected with the water inlet through a circulating pump; the degassing cylinder is communicated with the reactor through the flow guide pipe, the degassed sludge returns to the reactor through the circulating pump to form a closed loop, and through multi-mechanism collaborative degassing, the problem of particle floating caused by bubble adhesion, air bag and floc entrainment can be effectively solved, and the degassing effect is good.

This invention provides an aerobic reactor for wastewater treatment, comprising a tank, a sludge-water separation device disposed at the upper and lower parts of the tank, and at least one set of hydraulic mixing and oxygen supply devices. A clear liquid outlet is provided at the top of the side wall of the tank. The hydraulic mixing and oxygen supply device includes a liquid distributor and several upward-spraying and downward-spraying hydraulic agitators evenly distributed on both sides of the tank, with the number of upward-spraying hydraulic agitators not less than the number of downward-spraying hydraulic agitators. The inlet and outlet of the liquid distributor are respectively connected to the wastewater source and the hydraulic agitators. The sludge-water separation device includes a sludge-water separation module and a horizontal annular baffle sandwiched between the upper outer part of the sludge-water separation module and the inner side wall of the tank. The horizontal annular baffle is located below the clear liquid outlet. The aerobic reactor of this invention can achieve mixed oxygen supply for wastewater treatment, with high oxygenation efficiency, high oxygen utilization rate, good treatment effect and sludge-water separation effect, and low oxygenation energy consumption.

The application relates to the technical field of rural sewage treatment and resource utilization, and discloses a rural sewage treatment and resource utilization system, which comprises a pretreatment module, a biological treatment module and a deep treatment module; the pretreatment module comprises an adjusting tank and a grating; the biological treatment module comprises an aerobic reactor and an anaerobic reactor; a filter layer and an aeration assembly are arranged in the aerobic reactor; the anaerobic reactor is arranged above the aerobic reactor; a filler layer is arranged at the bottom of the anaerobic reactor; the deep treatment module comprises a sedimentation tank and a filter; water pipes and water pumps are arranged in communication between the adjusting tank and the anaerobic reactor and between the aerobic reactor and the sedimentation tank; the water pipe connected with the aerobic reactor and the sedimentation tank penetrates through the filter and extends to the lower side of the filter; a recycled water storage tank is arranged on the side, away from the biological treatment module, of the sedimentation tank; and the recycled water storage tank and the sedimentation tank are connected with an overflow pipe. The application has the effect of improving the sewage treatment efficiency.

The application discloses an electrochemical catalyst and a mobile treatment device for rural sewage, and a preparation method of the catalyst comprises the following steps: (1) acidification; (2) impregnation; and (3) calcination. The treatment device comprises a running vehicle, an electrochemical reaction unit and a biochemical reaction unit arranged on the running vehicle; the electrochemical reaction unit comprises an electrochemical reaction pool, a positive electrode, a negative electrode and the electrochemical catalyst of the application arranged in the electrochemical reaction pool; and the biochemical reaction unit comprises an anaerobic reaction pool, an MABR membrane reaction pool, an aerobic reaction pool, a sedimentation pool, a filter pool and a clean water pool which are sequentially connected. The application firstly develops the electrochemical catalyst with an isoelectric point at pH = 6.65 which is suitable for the pH of rural sewage (generally between 6 and 9), and provides the mobile treatment device based on the same. The device is provided with the electrochemical reaction unit before the biochemical reaction unit, accelerates the degradation and decomposition rate of organic matters in the rural sewage, and has the characteristics of circular economy.

The application discloses a sewage treatment equipment applied to cold regions, which comprises a hydrolytic acidification treatment tank, an anoxic reaction tank, an aerobic reaction tank, a screening tank, a primary sedimentation tank and a secondary sedimentation tank; a first gas stripping device is arranged in the hydrolytic acidification treatment tank; the anoxic reaction tank is communicated with the bottom of the hydrolytic acidification tank; the aerobic reaction tank is communicated with the upper portion of the anoxic reaction tank; the screening tank is communicated with the bottom of the aerobic reaction tank; the primary sedimentation tank is communicated with the upper portion of the screening tank; and the secondary sedimentation tank is communicated with the upper portion of the primary sedimentation tank. The sewage treatment equipment can perform multi-stage sedimentation on sewage, can also screen activated sludge, forms high-concentration agglomerated biochemical sludge, and can treat biological sewage in cold regions in the north, and can also realize sludge backflow, supplement nutrients and biochemical bacteria for the front end.