330results about How to "Clear water" patented technology

A device for converting the energy of water waves or flowing water into electrical or mechanical energy is provided. The device includes a body or collection chamber with a hydro-turbine located opposite the water entrance and, preferably, a water clear out channel flange located beneath the hydro-turbine and at or upstream of the water exhaust from the device. As the water is channeled by wave facing directional blades and a wave leveler through and exits the hydro-turbine or pump, it has free exit into a water void area which is produced by the water clear out channel flange or body. The device may be designed to operate in deep water, with its own floatation apparatus or moorings, or near shore, held by supports secured to the seabed or other structures. The device also exhibits a “tip up, tip down” synchronous motion as wave fronts advance through and passed the device, which increases the efficiency of the device by accelerating the flow of water therethrough.

The efficient sequencing batch type air lifting circular flow waste water treating bioreactor in alternative anoxia-anaerobic-aerobic process includes one squared or cylindrical reactor unit, one water inlet unit and one water outlet unit as well as one aerating system. The reactor unit includes one reactor body, one triphase separator, conic bottom, air lifting circular flow guide tube and upper deflecting baffle. The present invention also discloses corresponding technological process. By means of the sequencing batch type air lifting circular flow waste water treating bioreactor and the corresponding technological process, double target of oxidizing non-degradable organic pollutant and biological denitrification may be reached in the same reactor, the treated high concentration non-degradable nitrogenous industrial organic waste water may reach the drainage standard, and the residual sludge amount may be reduced by over 80%.

The invention discloses an ecological combined treatment method and device for rural distributed sewage. The method comprises the steps of A) rural sewage collection and pretreatment; B) treatment by a biological filter; C) treatment by an artificial wetland and a stabilization pond; D) ecological landscape configuration. The device is characterized in that a main water inlet pipeline is respectively connected with a lattice pool and a regulation pool, the regulation pool is connected with a horizontal flow biological filter through a water distribution pipe, the horizontal flow biological filter is connected with a vertical flow biological filter through a filter screen-water distribution pipe, the vertical flow biological filter is connected with a first-level artificial wetland via a perforated water collection pipe which is horizontally arranged, the first-level artificial wetland is connected with a second-level artificial wetland through an overflow weir, the second-level artificial wetland is connected with the stabilization pond through a straight flow water drain pipe, and a main water drain pipe is arranged at the tail end of the stabilization pond. According to the method, energy consumption is not required, the operation and the maintenance are simple and convenient, and the method further has the advantages of landscape effect, economic benefits, simple structure and low investment; high-efficient purification of rural distributed domestic and farming sewage is realized, and the removal rate of nitrogen, phosphorus, COD and the like in sewage is above 80% after treatment.

The invention discloses a method for utilizing microorganism in-situ circulation cultivation to treat water body pollution, (1) riverway sewage is utilized to be in-situ cultured, circulated, acclimatized and separated microorganisms out in a culture tank and an biological generator for being put into a water body, and the water body pollution is removed through microorganism absorption, decomposition and transfer; (2) an aerating device is adopted to aerate and provide a good environment for the culture tank, the biological generator and the riverway water body; and (3) a mixer is adopted to stir water sediment, so the pollutant of the sediment enters the water to be utilized by the microorganisms, and the ecological dredging is realized. The invention further discloses a device which is adopted by the method. The method takes nutrients in the reverway sewage as a strain medium, the microorganism environment is improved through aeration and stirring, the added foreign bacterium is more applicable to the water body, is mass propagated and has strong decomposition capacity, so the excellent speed is improved, the source is stable, the purposes of high efficiency, continuity, thoroughness and low cost are realized, meanwhile, the device has strong movability, is convenient to install and dismantle, and has a wide application scope.

The invention discloses a construction method of an ecological sewage treatment and water restoration system. The system can be used for the miniature domestic sewage treatment, the aquatic environment rehabilitation of medium and small sized lakes and the landscaping water management and rehabilitation engineering, can achieve the target of building the self-regeneration and self-succession water ecological system and finally building the self-regeneration and self-succession water ecological system, and can build the landscape type sewage treatment plant. The method comprises the following steps: A. building a rainwater conflux and percolation water charging system; B. building an ET biochemical system; and C. gradually building an ecological balanced system of the aquatic animal food chain according to the relationship between the ecological chains of grass-fish, alga-fish, alga-debris-snail and debris-microorganism on the basis of finishing building the ET biochemical system.

The invention discloses a preparing method of an oil field demulsifier. The preparing method adopts ethyleneamine as a raw material, and the oil field demulsifier is prepared by crosslinking modification of the ethyleneamine, ethylene oxide, and propylene epoxide. The method comprises the following steps of: with the ethyleneamine as an initiator, enabling the ethyleneamine to react with propylene oxide and ethylene oxide to prepare an ethyleneamine type polyether demulsifier under the existence of a basic catalyst; carrying out self-crosslinking reaction on the polyether demulsifier A by adopting polycarboxylic acid under the action of a catalyst to prepare a product B; and finally carrying out self-crosslinking reaction on the polyether demulsifier A and the product B in a solvent by adopting toluene diisocynate to prepare a high performance demulsifier as a final product. The demulsifier prepared by the preparing method has the advantages of higher relative molecular weight, favorable dehydration effect and favorable broad spectrum, and can be used for demulsification and dehydration of the crude oil in the oil field. The dehydrated water is clear, and the dosage of the demulsifier is less.

The invention belongs to the technical field of feeds and particularly relates to a feed for crabs. The feed for crabs is characterized by comprising the following materials in parts by weight: 30-60 parts of pork skin, 20-50 parts of fat pork, 5-15 parts of lean pork, 6-9 parts of corn meal, 3-5 parts of soybean meal, 1-5 parts of edible oil, 0.1-1 part of garlic cloves, 1-2 parts of fish scale powder and 0.5-1.5 parts of rape seed cakes. The main problems that since the feed for crabs is difficult to absorb, the crabs grow slowly and the water quality is contaminated in the prior art are solved; the feed disclosed by the invention has the beneficial effects of being rich in nutrition and aromatic in smell, containing antiviral components, and enabling the crabs to grow fast after the feed is eaten; the feed is simple to prepare and all the materials of the feed are rich in supply.

The invention discloses a preparation method of a demulsifier for oil fields. In the method, fatty alcohol is used as a raw material, and the demulsifier is prepared by crosslinking and modifying after reacting the fatty alcohol with oxirane and epoxypropane. First, the fatty alcohol is used as an initiator, and a polyether demulsifier A is prepared by reacting the fatty alcohol with propylene oxide and ethylene oxide in the presence of a basic catalyst. Then, a product B is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A with polycarboxylic acid under the action of the catalyst. Finally, a final product, i.e. the high-performance demulsifier, is prepared by carrying out self-crosslinking reaction on the polyether demulsifier A and the product B in a solvent with adoption of toluene diisocynate. The demulsifier prepared with the method has the advantages of high relative molecular weight, ideal dewatering effect and good broad spectrum property, and can be used for demulsifying and dewatering oil field crude oil. Separated water is clear, and the use amount of the demulsifier is small.

The invention discloses a lobster feed capable of purifying water and improving immunity. The lobster feed is prepared from the following raw materials in parts by weight: 3-5 parts of garlic, 1-3 parts of calcium dihydrogen phoshate, 2-3 parts of tender leaves of fennel, 4-6 parts of banana skin, 2-4 parts of villous amomrum fruit, 3-5 parts of cluster mallow fruit, 3-4 parts of sargassum thunbergii, 4-6 parts of dehydrated spinach, 2-4 parts of cinnamon, 6-8 parts of cuttleflsh bone, 5-8 parts of wheat middling, 20-30 parts of rapeseed dregs, 15-20 parts of meat and bone meal, 4-6 parts of stevioside and 6-10 parts of an assistant. The lobster feed disclosed by the invention is balanced in nutrient; due to addition of the rapeseed dregs, the meat and bone meal and the like, most of basic nutrients required by the lobster can be supplemented; the added stevioside is high in sweetness, and long in duration, and can play a good attractant effect; due to addition of villous amomrum fruit, the cluster mallow fruit and the like, the disease resistance of the lobster is further enhanced; and the survival rate of the lobster is increased.

A sewage treating agent with high speed and effect is prepared from attapulgite clay through acidifying, baking, adding alum and modified starch, and grinding. The generated mud is a good organic fertilizer.

The invention relates to an advanced treatment method of an ethylene waste lye, and belongs to the sewage treatment field. The method comprises the following steps: 1, adjusting the pH value of a wet-oxidized ethylene waste lye to a predetermined value; 2, carrying out primary aerobic biochemical treatment of the wastewater obtained in step 1 in a primary aerobic biochemical treatment pool; 3, carrying out Fenton oxidation treatment of the wastewater obtained in step 2; 4, adjusting the pH value of the wastewater obtained in step 3 to a predetermined value; and 5, carrying out secondary aerobic biochemical treatment of the wastewater obtained in step 4 in a secondary aerobic biochemical treatment pool, precipitating, and discharging the obtained supernatant. The method has the advantages of good ethylene waste lye treatment effect, short treatment flow, simple operation and stable running.

The invention discloses an on-line intelligent network automatic water treatment detection and control system which comprises a control center platform, a main board, a sensor, a pollution discharge, water replenishing and dosing device, an alarm module, a display screen, a computer and an intelligent mobile phone, wherein the output port of the sensor is connected with the input end of the main board, the output port of the main board is connected with the input end of the pollution discharge, water replenishing and dosing device, the output end of the main board is respectively connected with the display screen and the alarm module, the output end of the main board is connected with the computer or the intelligent mobile phone through the Internet or GPRS network, the main board and the control center platform are in bilateral interaction, and the control center platform and the intelligent mobile phone are in bilateral interaction. According to the invention, the sensor is used for detecting water quality data, and the opening and closing of the pollution discharge, water replenishing and dosing device are remotely controlled through the Internet, so that the electricity, water and chemical agents are furthest saved, the service life of an air conditioner is prolonged, the running cost of the air conditioner is lowered, and the environmental pollution is reduced.

A bioengineering composite ecology control method for natural water body belongs to environment regulation technosphere which is suitable for fathering lake, reservoir, riverway and sight. The bioengineering composite ecology control method for natural water body comprises following steps: enclosing water area-enclosing the water area into several unit water areas with insulated material; b cleaning-removing and cleaning the enemy fish by driving means in the enclosed unit water areas; c removing alga-covering water surface with covering in the clean unit areas to make alga in water body dead owing to lacking of photosynthesis; and reducing storm to blending water body; d planting or transplanting sunken plant in a unit water area with a high transparence after removing alga. The invention has some advantages of investing less, acting quickly, effecting better, long time, beautiful view and without secondary pollution.

The invention discloses a movable device for effectively collecting and processing algae pollutant, comprising an algae pulp scraping and absorbing device (1), an algae pulp delivery pump (2), a flocculation stirring tank (3), an algae pulp water extractor (5), a post processing device (6) and an algae pulp reflux pump (7). The algae pulp delivery pump, the flocculation stirring tank, the algae pulp water extractor and the algae pulp reflux pump are connected with each other by means of a closed loop in sequence and are integrated on mechanical equipment with a power supply device (9) and a control device (8); the output pipe of the algae pulp delivery pump (2) is communicated with the flocculation stirring tank (3); the flocculation stirring tank is communicated with the algae pulp water extractor (5); the lower part of the algae pulp water extractor is connected with the post processing device (6); the post processing device is communicated with the suction inlet of the algae pulp reflux pump (7); the discharging port of the algae pulp reflux pump is communicated with the flocculation stirring tank; and the algae pulp scraping and absorbing device (1) is communicated with the algae pulp delivery pump (2). The invention adopts a laminated screw thrust water extractor which is also named as a laminated screw mud water extractor, when the screw rotates, the device relatively turns and forms a helically forwards impelled lamination so that filtrate is fast filtrated by means of cutting in the clearance of the helically forwards moved lamination, the volume of a helical cavity is continuously shrunken, so that inner pressure is increased, the water content of a filter cake fast reduces under a pressure doubling function, the filtrate continually flows out, and the algae pulp is dehydrated and concentrated to be mud. The separated water is clear and is discharged into rivers and lakes, thereby avoiding polluting natural water body.

The invention discloses an urban sewage treatment system, which comprises a filtering chamber, an aeration chamber, a flocculation chamber, a precipitation chamber and a sterilization chamber in sequential arrangement from left to right, wherein a flow guide plate is arranged in the filtering chamber; a filtering screen layer is arranged above the flow guide plate in an inclined way; an adsorptionrod is arranged above the filtering screen layer in an inclined way; an aeration device is arranged in the aeration chamber; a grille bar and a wave-shaped baffle plate are arranged in the precipitation chamber; a water distribution disc is arranged in the sterilization chamber. A sewage treatment method comprises the following steps of (1) sewage filtering treatment; (2) sewage aeration treatment; (3) sewage flocculation treatment; (4) sewage precipitation treatment; (5) sewage sterilization treatment; (6) regular maintenance. The treatment system has the advantages that the occupied area issmall; the cost is low; the practical operation and use are convenient; multiplex treatment is performed on the sewage, so that the treated water quality is high; the water body is clearer; the long-time, healthy, stable and efficient operation of the urban sewage treatment system can be ensured.

The invention discloses a method for ecologically culturing Rana spinosa, which comprises the following steps of culturing farm construction, culturing time, gutter way water level, culturing density, bait feeding, temperature control and disease prevention. The constructed culturing farm is basically similar to the natural ecological environment and ensures that Rana spinosa can have a good playing and activity space, the metabolism of the Rana spinosa is promoted and the Rana spinosa grow well. The gutter way water level is 2-3cm above the surface of the gutter way, so that the Rana spinosa can have moist skin and strong disease resistance. Baits are more economical and more balanced in nutrition, and the quantity of chemical drug residues in the Rana spinosa is relatively low. The method for ecologically culturing Rana spinosa has the advantages that the culturing farm is basically similar to the natural ecological environment, the playing activity space of the Rana spinosa is proper, germs are not easy to propagate, and the Rana spinosa has balanced nutrition, better growth, strong germ resistance and high survival rate.

The invention discloses a high-efficiency water-changing fry breeding pool comprising a breeding pool body, partitions, a moving plate, filter plates, an isolation screen plate, a frame, a lifting device and a moving part. The high-efficiency water-changing fry breeding pool is characterized in that two sets of the partitions are disposed in the middle of the breeding pool body; the breeding poolbody is divided into two parts of a first breeding barn and a second breeding barn; a through hole allowing fries to pass through is opened in the middle of the partition; the moving plate is connected with the lifting device which is disposed on the frame; the frame is arranged above the breeding pool body; two sets of the partitions are respectively arranged on the lower portions of the first breeding barn and the second breeding barn; the end portion of the isolation screen plate is located below the through hole; a first filter plate is located inside the first breeding barn while a secondfilter plate is positioned inside the second breeding barn; a moving part is slidably arranged on the frame. The high-efficiency water-changing fry breeding pool has the advantages of facilitating water changing in the first breeding and second breeding barns, achieving the best breeding environment inside the first breeding and the second breeding barns, and being conducive to healthy growth ofthe fries.

The invention relates to a method for rebuilding a gangue dump close-to-nature ecological system and belongs to the filed of ecological restoration. The method includes three stages: the first stage lasting for 3-5 months includes: fast rebuilding an ecological system mainly containing herbaceous plants to allow the earth surface vegetation coverage to be more than 90%; the second stage lasting for 3-5 years includes: accelerating the conversion of the ecological system mainly containing herbaceous plants into the ecological system mainly containing shrubs through artificial interference; the third stage lasting 3-5 years includes: totally depending on natural succession to allow the rebuilt ecological system to be in good circulation, form a complete food chain as predators occur, and enter the self-updating state. The method is mainly applicable to ecological restoration after coal gangue dump treatment and has the advantages that the plant varieties are reasonably configured during plant restoration, animal and artificial actions are introduced, and the systematic gangue dump close-to-nature ecological system rebuilding is achieved.

Belonging to the technical field of biological sewage treatment, the invention relates to a method for deep denitrification of an integrated biological aerated filter, and the method is suitable for deep denitrification of sewage and wastewater. A device for deep denitrification of the integrated biological aerated filter mainly comprises: a water inlet system, the integrated biological aerated filter, a carbon source adding system and a back washing system. The integrated biological aerated filter adopts an upward flow operation mode, and is divided into a nitrification area and a denitrification area through a gas-water separator. The method includes: subjecting nitrogen-containing sewage and wastewater to ammonia nitrogen oxidation by the nitrification area at the lower part of the biological aerated filter; passing the gas through an intermediate water layer, then conducting separation and discharge; and making use of the electronic donor provided by an external carbon source in the denitrification area to complete deep removal of nitrogen. The device has a small floor area and a simple process, and is easy to form integrated equipment.

The invention relates to a method for performing ultrasonic separation on oily wastewater with oil-soluble ferroferric oxide nanoparticles. The method comprises the following steps: performing ultrasonic treatment on oily wastewater while adding oil-soluble ferroferric oxide nanoparticles in the oily wastewater, performing ultrasonic dispersion to ensure that ferroferric oxide enters the microdroplets of the wastewater with the help of the hydrophobic alkyl surface and magnetic oil microdroplets with ferroferric oxide particles are formed, and then combining magnetic separation to achieve the aim of removing the oil microdroplets in the wastewater. The method can be applied to treat the oily wastewater, improve the human living environment and increase the life quality of people. The oily wastewater treated by the method, particularly the oil extraction wastewater in the oilfield has a remarkable oil-water separation effect.

The invention discloses a minitype sewage integrated device which comprises a device body, wherein the device body is sequentially provided with a stirring cavity, a separation cavity and a disinfection cavity; a stirring device and a flocculation device are arranged in the stirring cavity; a cleaning device, a filter unit and a sewage accumulation device are arranged in the separation cavity; and a sterilizing device is arranged in the disinfection cavity. The sewage treatment method comprises the following steps: (1) sewage primary filtration; (2) sewage stirring treatment; (3) sewage separation treatment; (4) sewage disinfection treatment; (5) water quality detection; and (6) periodical maintenance. The minitype sewage integrated device has the advantages of simple structure, high practicality, small size and low cost, and is convenient for actual operation and use. After the sewage is sequentially treated by the stirring cavity, separation cavity and disinfection cavity, the treated water has high quality and is clearer.

The invention discloses a traditional Chinese medicine wastewater treatment system and a method for treating traditional Chinese medicine wastewater. The traditional Chinese medicine wastewater treatment system consists of the following four parts of a pretreatment system, a biochemical treatment system, an advanced treatment system and a sludge treatment system. In the pretreatment system, a wastewater storage tank, a three-dimensional electrolytic cell, a sand filtering tank, a secondary filtering tank and an aeration device mainly take a role of blowing-off to remove chloroform from wastewater and thus to enable existence of microorganisms in the subsequent treatment buildings to be difficult, so that the defect that the traditional Chinese medicine wastewater is difficult to be treated biochemically is solved. According to the invention, the three-dimensional electrolysis is applied to the wastewater treatment, the test proves that 80% of COD of the wastewater can be degraded when the wastewater is subjected to electrolysis for 24 hours, the effect for treating highly difficult organic wastewater is obvious, and the biodegradability of the wastewater is increased; coagulation-sedimentation-filtration, blowing-off, three-dimensional electrolysis and biochemical treatment are well combined and applied, so that the effluent water quality is clear and the process cost is low.

The invention relates to an environmental-friendly system, in particular to a sludge processing system for watercourses and lakes. The sludge processing system comprises a control system, a sludge hoisting device, a sludge water preprocessing device and a sludge water magnetic separation drying device, wherein the sludge hoisting device, the sludge water preprocessing device and the sludge water magnetic separation drying device are sequentially connected, the sludge hoisting device comprises a hoisting pump and a sludge suction head part, the sludge water preprocessing device comprises a dosing system, a coarse screen, a sand removing device and a coagulating device which are sequentially connected through pipelines, and the sludge water magnetic separation drying device comprises a magnetic separation device and a squeezing device. According to the sludge processing system disclosed by the invention, the water content ratio of processed sludge is less than 75%, the sludge body is reduced by nine tenths, the water body color of a black, smelly and high watercourse is obviously changed, the COD (Chemical Oxygen Demand) and the BOD (Biological Oxygen Demand) for processing outlet water are reduced by 40-45 %, and the water quality is clear. The sludge processing system disclosed by the invention is suitable for processing sludge and sewage of city landscape watercourses, artificial lake water bodies and city buildings and protecting the reservoir water source.

Belonging to the technical field of environmental sewage treatment, the invention in particular relates to a method for direct filtration of municipal wastewater with a plate ceramic membrane. The method includes the three processes of: 1) performing coagulation to promote the destabilization settlement of suspended particles and organic pollutants; 2) letting a coagulated suspension flow into a plate ceramic membrane reactor, and conducting low pressure filtering to obtain purified effluent water; and 3) performing online / offline backwash process to control membrane pollution. The method provided by the invention can effectively reduce the concentration of organic matters and phosphorus in water and reduce the membrane pollution rate.

The invention relates to a developing and governing method for a sandy wide channel canal / shoal / pool. A narrow river channel is formed by two main dikes (new flood dikes) which are constructed between the prior flood dikes at two sides of a sandy channel segment along the riverway trend, and large dams are constructed at the upstream and the downstream. A water supply and sand diversion canal is constructed at the inside or outside of at least one of the main dikes in the narrow river channel. A conveyance and navigation canal is constructed outside one or two sides of the narrow river channel. The conveyance and navigation canal is adjacent to the water supply and sand diversion canal or the conveyance and navigation canal, or the conveyance and navigation canal is a split type. The bottomland and the pool surrounded by the diking are changed from the shoal area between the main dike or canal dike and the prior flood dikes. The bottomland can be a permanent site for living, production, construction and development. The long-term reserved pool is capable of storing water resource and supplying water in non-flood season, storing floodwater and replenishing dryness in flood season, and detaining and storing the flood. The developing and governing method for the sandy wide channel canal / shoal / pool effectively prevents from flood, treats and uses slit, ensures the security in flood prevention, and supplies enough rinsing water source; the water service cost is low, and the method is capable of developing and utilizing the resources such as hydraulic power, shipping, and tourism, etc. in the channel segment, and the method has a positive meaning in improving environment.

The invention relates to a method for treating refuse leachate membrane-concentrated liquid by using ozone advanced oxidation. Refuse leachate membrane-concentrated liquid is fully mixed with metal salt like inorganic macromolecular flocculant and polyacrylamide, then the mixture is delivered to a gas floatation clarifier for performing mud-water separation, the PH value of clear liquid obtained after the separation is regulated, and then the clear liquid is drained into a settling pond for performing settlement treatment; supernatant of the settling pond is delivered to an ozone catalytic oxidation reaction device; wastewater obtained after ozone catalytic oxidation is delivered to an advanced oxidation device for performing advanced oxidation; the wastewater obtained after the advanced oxidation is delivered to denitrification equipment for performing denitrification treatment; the wastewater obtained after denitrification treatment can reach a discharge standard. The method for treating refuse leachate membrane-concentrated liquid by using ozone advanced oxidation has the characteristics of simple process line, high treatment cost performance and no secondary pollution.

A device for converting the energy of water waves or flowing water into electrical or mechanical energy. The device includes a body or collection chamber with a hydro-turbine located opposite the water entrance and, preferably, a water clear out channel flange located beneath the hydro-turbine and at or upstream of the water exhaust from the device. As the water is channeled by wave facing directional blades and a wave leveler through and exits the hydro-turbine or pump, it has free exit into a water void area which is produced by the deep water, with its own flotation apparatus or moorings, or near shore, held by supports secured to the seabed or other structures. The device also exhibits a “tip up, tip down” synchronous motion as wave fronts advance through and passed the device, which increases the efficiency of the device by accelerating the flow of water therethrough.

The invention relates to a treating process for a high-concentration DMF leather steaming solution. The treating process comprises the following steps: pouring high-concentration DMF leather wastewater into a water collecting regulating tank; regulating water quality and water quantity; adopting a lifting pump for lifting the leather wastewater in the water collecting regulating tank into a neutralizing reaction tank; adding acid for adjusting pH and then entering into a biochemical pool, thereby biochemically degrading pollutants, such as, most organic matters and ammonia nitrogen; coagulating by adding a coagulant into a coagulation reaction tank by which the effluent from the biochemical pool passes, and then pouring into a secondary sedimentation tank for precipitating; removing suspended solids from water; pouring into a chemical oxidation tank; adding an oxidizing agent into the chemical oxidation tank; further degrading the organic matters which are difficult to be chemically treated, thereby increasing the biodegradability of the wastewater; after the effluent chemically oxidized in the chemical oxidation tank passes by the coagulation reaction tank, adding the coagulant into the coagulation reaction tank and then pouring into the sedimentation tank for precipitating; guiding the effluent from the sedimentation tank to enter into a catalytic oxidation tank for performing secondary biochemical treatment, thereby further degrading COD and ammonia nitrogen; coagulating and precipitating the effluent after the secondary biochemical treatment in the coagulation reaction tank; discharging the precipitated sludge into a final sedimentation tank, thereby guaranteeing the effluent being clean, transparent and odorless.

The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment method. The landfill leachate treatment method comprises the following steps: step 1, treatment in an adjusting tank; step 2, electric flocculation treatment; step 3, anaerobic tank treatment; step 4, treatment in an anoxic tank; 5, aerobic treatment on the MBR membrane reactor; step 6, filter treatment; step 7, NF membrane and RO membrane treatment; and step 8, treatment on the landfill leachate concentrated solution. The landfill leachate treatment method can effectively reduce the conductivity and part of COD, ammonia nitrogen and other pollutants in the leachate; the biodegradability and stability of the landfill leachate are improved, the occupied area of a biochemical treatment system is reduced under the same condition, the service life of a membrane system is prolonged, the water production rate of the membrane system is improved, and meanwhile, the problems encountered in recharging and evaporation of a concentrated solution are effectively solved.

The invention relates to an advanced treatment composite catalyst for industrial wastewater as well as a preparation method and application thereof. The composite catalyst-SKL-A is prepared by doping Mn, Co and Ni-substituted polyoxometallate PW11 with Fe and Cu, and then loading the Mn, Co and Ni-substituted polyoxometallate PW11 doped with Fe and Cu onto a modified carrier APS-SiO2. The preparation method can be used for overcoming the following defects: a Fenton process in an advanced oxidation process for advanced wastewater treatment is high in sludge amount and high in chemical feeding amount; a Fenton fluidized bed process is high in blockage possibility and difficult in continuous operation; an ozone catalytic oxidation process is low in treatment efficiency and limited in treatment capacity. The advanced treatment composite catalyst is large in specific surface area, increased in catalytic active points, improved in catalytic activity and improved in oxidation reaction velocity and oxidizing ability, has a favorable treatment effect on non-biodegradable pollutants in industrial wastewater, is low in stripping possibility during a reaction process and can be recycled. Compared with ferrous iron used as a catalyst in a Fenton reaction, the composite catalyst SKL-A is relatively efficient, broad in spectrum, and less in Fe leaching during use, and can be continuously and repeatedly used.