1843results about How to "Improve effluent quality" patented technology

The invention relates to an ultrasonic combined waste water treatment process of refuse leachate, relating to the technical field of waste water treatment and recycling of resources and environmental protection. The ultrasonic combined waste water treatment process of the refuse leachate comprises the following steps of: enabling waste water to enter a regulating pond; treating colloids, amphoteric substances and heavy metals in a coagulation sedimentation pond; eliminating ammonia nitrogen in an ultrasonic catalytic oxidation pond; sequentially sedimentating through biological treatment in an ABR (Acrylate Butadience Rubber) baffle plate anaerobic pond, a hydrolytic pond, a facultative pond and an aerobic pond; filtering in a CMBR (Chatter Membrane Bioreactor); eliminating waste gases and stench in a carbon filter pond; disinfecting in a contact disinfection pond; and filtering in an RO (Reverse Osmosis) membrane reverse osmosis system so as to obtain water meeting the requirements for emission standards. The invention also provides a treatment system for the ultrasonic combined waste water treatment process. The ultrasonic combined waste water treatment process and system can obtain the outflow water with stable quality by treating the refuse leachate; the treatment system has the advantages of small size and occupying area, high efficiency, low energy consumption and easy realization for mechanical-electrical integration control and management; and in addition, the invention is beneficial to the protection of the original landscapes of a construction party by adopting a non-buried type structure and also reduces the influence of the operation of the treatment system on an office area.

Disclosed is a technique for processing organic waste water, including the following steps: (a) preprocession: pour the waste water into the micro electrolytic reducing pool where the iron-carbon micro electrolytic reaction occurs under the agtatering effect, add hydrogen peroxide into it to have. Fento oxidation, then the water enters into coagulation pool into which add NaOH and PAM; (b) anaerobe hydrolysis oxidation procession: power the organic waste water preprocessed into high effective anaerobe hydrolysis oxidation pool in which add into the TCBS reactor in which add into high effective compound microbe, making the water mix with the flowing-back mud with high density after denitrification. The invention can increase the biochemical of organic waste water, strengthen its resistance to poison and impact as well as the biological denitrification funcation, and making the waste water reach the national environment protection requirement by reducing the polluting load by steps.

The invention discloses an attapulgite clay porous porous ceramsite, a preparation method of the ceramsite, and a purpose of the ceramsite. The ceramsite is prepared from raw materials of attapulgite clay and biomass, and a binder of industrial soluble glass. The ceramsite is prepared through calcining and oxidizing. The attapulgite clay porous ceramsite prepared by the present invention has advantages of high porosity, large specific surface area, high strength, strong water resistance, high water absorption, high catalytic activity, and the like. The porous ceramsite prepared by the presentinvention can be applied as a carrier for a catalyst, and a filling material for an aerated biological filter.

The invention relates to a combined treatment method for sodium chloride-containing wastewater generated in dressing and smelting of rare earth. According to the method, a series of desalination and concentration treatments such as deoiling, neutralizing, homogenizing, aeration, flocculation, ultrafiltration, nanofiltration, reverse osmosis, electroosmosis and MVR (mitral valve replacement) concentration are carried out on the wastewater, so that recyclable purified water is obtained; ammonium bicarbonate is added into the sodium chloride extracted from the wastewater, so that the sodium salt can be converted and regenerated into sodium bicarbonate, sodium carbonate and ammonium chloride products for dressing and smelting of the rare earth. According to the method, the recovery rate of the wastewater is high, the effluent quality is stable, the conversion rate of the sodium salt is high, and no three wastes are discharged; production equipment is compact, simple to operate, and easy to realize automation control; the problem that the sodium chloride-containing wastewater and other similar industrial wastewater generated in dressing and smelting of rare earth are difficult to recycle is solved.

The invention provides a method and a device for treating high-concentration organic chemical-industrial sewage. Specifically, the invention provides an integrated sewage treatment method of 'materialized pretreatment' plus 'biological intensification treatment' plus 'flocculating air-flotation aftertreatment' as well as a sewage treatment device. The sewage treatment method and the sewage treatment device can realize high-efficient and low-cost treatment of chemical-industrial sewage which has high COD (Chemical Oxygen Demand) and is difficult to degrade.

The present invention relates to an immersion hollow fibrous membrane separating device and the operation method thereof. The device comprises a membrane filtration system, a water producing system and a cleaning system which are connected by the tubes and a control system which is connected by a circuit, the present invention is characterized in that the membrane filtration system takes an immersion type, adopting a column external pressure hollow fibrous membrane component, a plurality of holes are arranged at the casing, the device is directly and vertically arranged in the processed water body; the water producing system comprises a pressure gauge, an automatic intake valve, a water producing pump, a flow meter and an automatic discharge valve which are sequentially connected with a water producing opening of the membrane module; the cleaning system comprises a backflushing system, a gas vacuole scrubbing system and a chemical cleaning system, the gas vacuole scrubbing system comprises a flow meter, an air inlet valve, an air adjusting valve, a filtrating pressure reducing valve, an air receiver and an air compressed valve which are sequentially connected with the backflushing air intake of the membrane module. The operation method includes a plurality of cyclic processes as follows: 1. an operating state, a backflushing state, a gas vacuole scrubbing state and a pollution discharge state; 2. the operating state, the backflushing and gas vacuole scrubbing state, an gas vacuole scrubbing state and the pollution discharge state; 3. the operating state, a chemical backflushing state, the gas vacuole scrubbing state and the pollution discharge state.

The invention relates to the technical field of water treatment, and particularly relates to and discloses a treatment method for zero discharge of high-hardness high-salinity wastewater. The method comprises the steps of pretreating; ultrafiltering in a first section; carrying out reverse osmosis treatment in the first section; carrying out enhancing treatment on reverse osmosis concentrate in the first section; filtering by multiple mediums, softening, and ultrafiltering and carrying out reverse osmosis treatment in a second section; passing the reverse osmosis concentrate in the second section through a nano-filtration device; passing nano-filtration permeate through an electrodialysis device; introducing fresh water generated by the electrodialysis device into ultrafiltration water of the second section, and taking concentrate in the electroldialysis device for regenerating a softener; feeding nano-filtration concentrate into an evaporation system to obtain a solid matter, and taking water in reverse osmosis treatment of the first and second sections as reuse water. According to the treatment method for zero discharge of high-hardness high-salinity wastewater, physicochemical treatment, membrane integration technology and evaporation technology are combined, so that the problem that the environment is polluted by high-hardness high-salinity concentrate discharge can be effectively solved, the requirement for zero discharge can be met, the effluent water quality is stable, and the water utilization rate is improved.

An oiling-bearing sewage treatment and treater are disclosed. The process is carried out by air floating dissolved air, drastically purifying by ultra-filtration membrane treating system and reverse osmose treating system, adding flocculant into sewage, entering it into air floating pool from top, entering micro-bubble into air floating pool from bottom and forming into counter-flow contact.

The invention provides equipment and a method for treating nondegradable wastewater by utilizing catalytic oxidation of ozone. The equipment comprises a feeding system, an ozone catalytic reaction tower and a spray absorbing tower; the feeding system comprises a wastewater pH regulation device, a wastewater feeding pipeline, a hydrogen peroxide aqueous solution feeding pipeline, an ozone feeding pipeline and a pH regulator feeding pipeline; the wastewater pH regulation device is communicated with the wastewater feeding pipeline and the pH regulator feeding pipeline respectively; the ozone feeding pipeline is communicated with the wastewater feeding pipeline; the ozone catalytic reaction tower is communicated with the wastewater feeding pipeline and the hydrogen peroxide aqueous solution feeding pipeline respectively so that wastewater undergoes once catalytic reaction in the presence of a first catalyst to generate a liquid flow and an ozone tail gas flow which are subjected to initial treatment; and the spray absorbing tower is communicated with a catalytic reaction system, is used for spraying at least one part of the liquid flow which is subjected to the initial treatment, and is contacted with the ozone tail gas flow in the presence of a second catalyst to undergo second catalytic reaction.

The invention discloses a method for treating acidic waste water containing heavy metal and reclaiming the heavy metal through a biomass fixed bed, which is characterized in that dry solid biomass capable of being decomposed by microbes is granulated and filled into a container with a supporting layer and a water distributing device so as to form a fixed bed microbe reactor; sewage disposal plant sludge containing sulfate reducing bacteria is taken as the source of microbe bacteria on the fixed bed, and the microbes are cultured, proliferated and acclimated to adapt to the environment of the biomass filler fixed bed through the backflow circulation of the outputted water or taking ferrous sulfate aqueous solution as the inputted water; acid effluent containing heavy metallic ions is led into the fixed bed for direct filtration; and when the water filtering speed can not meet the preset requirements, the operation is stopped, substances in the fixed bed are taken out, the heavy metal is reclaimed through smelting, and the fixed bed microbe reactor is refilled. The method is suitable for waste water containing Cr2O7 <2->, AsO3 <2->, Cu <2+>, Hg <2+> Ag <+>, Cd <2+> and the like. The method can be used for reclaiming the valuable metal resources with low waste water treatment cost.

The invention relates to a subsurface flow constructed wetland sewage treatment system by drop water aeration oxygenation, composed of drop water aeration subsurface flow constructed wetlands in one stage or multistage series. Each stage of drop water aeration subsurface flow constructed wetland comprises a bed body, an inflow barricade, an outlet barricade and a drop water baffle; wherein a plurality of deflectors, gravel fillers and emergent aquatic plants are arranged in the bed body between the inflow barricade and the outlet barricade. The invention is even in water distribution, small inwake space and uniform in water impact, residence time of sewage in the bed body is extended, blocking is difficult, thus being beneficial to improving effluent quality and biodegradation of microorganism on nutrient such as nitrogen, phosphor and the like in the sewage, and construction and running cost is low. The invention, under the joint action of the effects, can effectively degrade pollutant of urban and town domestic sewage, a small amount of industry waste water and farm drainage and is applicable to mountain land and hilly country with certain gradient.

The invention discloses a three-stage circulation aerobic reactor, which comprises a pond body, wherein the inside of the pond body is partitioned into a conical sewage expansion area, an aerobic reaction area, an anaerobic reaction area and a sediment filtering layer from bottom to top in sequence; the upper part of the aerobic reaction area is provided with a primary gas-solid-liquid separation area; the upper part of the anaerobic reaction area is provided with a secondary gas-solid-liquid separation area; three-phase separators are respectively arranged in the primary gas-solid-liquid separation area and the secondary gas-solid-liquid separation area; a water outlet weir is arranged above the sediment filtering layer; a water outlet pipe is arranged on the water outlet weir; the top of the pond body is provided with a double-stage circular reflowing system; the double-stage circular reflowing system comprises an air-lift pipe, a gas-liquid separating tank and a lower layer reflowing pipe; an upper layer reflowing pipe is arranged between the secondary gas-liquid separation area and the sediment filtering layer; and the upper layer reflowing pipe is connected with an aeration air inlet pipe arranged above the pond body. The reactor is provided with a three-stage circular reflowing system, and has the characteristics of rapid start of flocculent sludge, high impact load resistance, low requirement on the PH value of inflow water, high particle sludge increasing speed, low energy consumption, high treating efficiency and stable water yielding quality.

The invention relates to a membrane treatment process for oilfield reinjection water, which comprises the specific steps of: firstly introducing oil-containing wastewater into a settling tank for naturally settling to remove part of large suspended solid granules and waste oil; directly introducing the settled water into a ceramic membrane ultrafiltration device for internal circulating filtration, directly using the liquid penetrating through the membrane for reinjection, introducing the circulating liquid containing large amounts of suspended solid granules and waste oil which do not penetrate through the membrane into the settling tank for continuing settlement, mixing with inflow water and introducing into the ceramic membrane ultrafiltration device for filtration again; automatically discharging pollutants when the wastewater in a circulation tank reaches a certain concentration ratio; and automatically adjusting the membrane surface flow rate of an online detection device according to the inflow water quality conditions, so as to achieve the purpose of energy conservation. The membrane treatment process provided by the invention has the advantages of simple process, low investment cost, high filtering precision, no need for the introduction of any reagents during the treatment process, no secondary pollution, etc.

The invention relates to the technical field of processes for treating acidic arsenic-contained wastewater discharged by non-ferrous smelting and sulfuric acid industries and particularly discloses a process for treating high-arsenic and high cadmium waste acid by using a three-stage lime-ferric salt method. The process comprises the following three stages: firstly, gypsum manufacture: adding lime to adjust the pH value to 2, and carrying out solid-liquid separation to obtain gypsum slag, wherein the gypsum slag can be used for manufacturing cement; secondly, neutralization, oxidation and arsenic sedimentation: adding lime into a supernatant liquid, adjusting the pH value to 5-6, adding ferrous sulfate according to the ferrum-to-arsenic ratio of 4:1, continuously aerating, adding anionic polyacrylamide for coagulation, and removing most of arsenic; and thirdly, neutralization and coagulation: adding lime to adjust the pH value to 9, adding ferrous sulfate according to the ferrum-to-arsenic ratio of 4:1, continuously aerating, adding anionic polyacrylamide for coagulation, and removing residual arsenic and heavy metal ions. After wastewater with the highest arsenic concentration of 14740mg / L and the highest cadmium concentration of 130mg / L is treated by using the process, the concentration of arsenic in the wastewater is reduced to 0.25g / L, no cadmium is found, and therefore, the wastewater achieves the national discharge standard.

The invention discloses a technology for treating landfill leachate, which comprises the steps of pretreatment, upflow type sludge bed reaction, nitrification and denitrification reaction, mud-water separation and membrane treating. The technology for treating landfill leachate treats the landfill leachate by comprehensively using physics and biochemistry method, which largely reduces the cost for treating the leachate, simultaneously promotes effluent water quality at large amplitude, and can be widely used for treating landfill leachate in a waste treatment plant.

The invention relates to a treatment technique for purifying oil-polluted water. The invention provides a three-phase cyclone separator and a purification treatment system containing the three-phase cyclone separator for simplifying the purification process of oil-polluted water. The three-phase cyclone separator comprises a conical sludge collector at the lower part, a cyclone sedimentation area at the upper part, a sloped tube sedimentation area and a filter layer area, wherein a plurality of oil capturing plates are arranged between the sloped tube sedimentation area and the filter layer for forming an oil capturing area, the oil capturing plates are provided with conically raised oil-collecting cones which are evenly distributed, and a top oil collecting hole on the uppermost oil capturing plate is communicated to a cavity body provided with an oil outlet at the top part of a tank body through an oil pipe. The oil-polluted water purification treatment system including the three-phase cyclone separator comprises a medicament treatment and launching section, the three-phase cyclone separator and an oxidation and filtration adsorption section. The treatment technique has advantages of short technical process, less time consuming in the purification treatment, small occupying area, stable water treatment, recyclable oil resource, environmental protection and reaching the standards.

The invention discloses a method for recovering salt from a waste water treatment system. The waste water is subjected to primary treatment by virtue of the processes such as oxidation, adsorption, precipitation, filtration, softening and CO2 removal in the steps (1) to (5); the running influence factors and effects of RO (reverse osmosis) in the step (6) are removed; meanwhile, the purity of subsequently extracted nitrate and salt is ensured; a set of step-by-step nitrate and salt separation process of warming, cooling and warming is provided in the steps (7) to (11); the extracted nitrate and salt are ensured to meet the purity requirements; and meanwhile, the processed liquid waste is subjected to secondary treatment. The invention also discloses a system for a process for recovering salt from the waste water treatment system. An energy conversion unit is arranged in the system; the heat in the nitrate and salt extracting processes is mutually converted and used; the energy utilization rate is increased; and resources are saved to the maximal limit.

This invention is related to a process of disposing urban sewage, which comprise the steps of coagulate filtration, ozone oxidation, biological oxidation to dispose urban sewage, so that the residual undegradable organic substances, bacteria and virus in the second-class urban sewage can be removed and the water can be recycled. According to different usages of the recycled water, the process also comprises reverse osmosis or nanoscale filtration treatment to further remove the residual organic and inorganic substances in the water. The process is a combination of coagulate filtration, ozone oxidation, biological oxidation and reverse osmosis, designed to resolve such problems as urban sewage disposal and water recovery. The process can obtain high-quality recycled water with a low cost, showing high cost performance, which is important to resolving urban water depletion, raising the utilization rate of water resources, reducing environmental pollution and promoting sustainable development of the society.

The invention discloses a spinning printing and dyeing waste water reclamation method, a device and the application thereof. The method comprises the steps of: filtering spinning printing and dyeing waste water; sequentially carrying out homogenizing, equalizing quantity and primary sedimentation on filtrate; adding sodium chloride into waste water supernate, and evenly mixing for indirect electro-catalysis oxidation; sequentially evenly mixing the waste water treated by indirect electro-catalysis oxidation with basic aluminium chloride and polyacrylamide; removing the precipitated supernate, and sequentially treating by activated carbon adsorption and reverse osmosis; removing trace organic chloride generated in the electrolytic process and the rest COD and color; and obtaining recyclable water resource. The device for realizing the method comprises a grate, a regulating reservoir, a sealed electrolytic cell, a flocculation tank, an inclined tube sedimentation tank, a sand filter tank, an active carbon filter, an intermediate water tank, a reverse osmosis unit, a clear water reservoir, a brine tank, a chlorine absorbing tank, a sludge concentration tank and a plate-and-frame filter press. The invention can effectively treat spinning printing and dyeing waste water, and has the advantages of high treatment efficiency, stable effluent quality, simple technological process and the like.

The invention discloses a device which can realize the shortcut nitrification of sludge-digestion liquid through the combined control of FA and FNA. The device is provided with a raw water box, a shortcut nitrification reactor, a sedimentation tank and a water tank; the shortcut nitrification reactor is divided into a hypoxia stirring area and an aerobic zone, and a DO / pH online controller is arranged in the aerobic zone; an air-blast-head is arranged at the bottom of the reactor; a method utilizing the device to realize the shortcut nitrification comprises the following steps: firstly, a system is started; and secondly, the adjustment is carried out in running; the invention is applicable to the nitrification of the sludge-digestion liquid of a sewage treatment plant, the structure of the device is simple, the process of the method is simple, the operation is convenient, a plurality of carbon sources are saved, the nitrification speed is fast, and the effect is good.

The invention relates to a real-time automatically back-flushing control system of a denitrification filter pool and a running method. The system comprises an online water turbidity sensor, a nitrate sensor, a turbidity tester and a nitrate tester, and further comprises a process controller and an industrial personal computer. The online water turbidity sensor, the nitrate sensor, the turbidity tester and the nitrate tester are arranged in the denitrification filter pool. The process controller is provided with a plurality of relays of a water feeding pump relay, an intake valve relay and the like, and the relays are sequentially and respectively connected with corresponding pumps and valves in a control manner. A clean water tank is further provided with a water discharging pipe and a mud storage tank, the water discharging pipe is communicated with the upper part of a filter material layer of the denitrification filter pool, and the mud storage tank is communicated with the upper part of the denitrification filter pool. The running method of the back-flushing control system comprises the following steps of: 1, control system starting; 2, parameter treatment judgment; 3, drainage process; 4, single gas back-flushing; 5, gas-water combined back-flushing; and 6, single water back-flushing. The invention is suitable for the urban sewage advanced treatment and the nitrogenous industrial wastewater treatment, and has the advantages of perfected structure, convenience of operation, high efficiency and good effect.

The invention provides a double-circulation anaerobic reactor. The double-circulation anaerobic reactor comprises a cell body, wherein the cell body is sequentially divided into a cone-shaped sludge bulking region, a main reaction region, a secondary reaction region and a sediment region from bottom to top, a first-stage gas-solid-liquid separation region is arranged at the upper part of the main reaction region, a second gas-solid-liquid separation region is arranged at the upper part of the secondary reaction region, an effluent weir is arranged above the sediment region, a first-stage sewage gas pipe is connected between an air-water separation tank and the first-stage gas-solid-liquid separation region, a second-stage sewage gas pipe is connected between the air-water separation tank and the second-stage gas-solid-liquid separation region, a sewage gas circulating pipe is connected between the air-water separation tank and a water distribution pipe, the water distribution pipe is arranged at the bottom of the cell body, and a sludge discharging pipe is further arranged at the bottom of the cell body. The double-circulation anaerobic reactor has the advantages that the cell body has low height, the double-circulation anaerobic reactor can be started quickly by flocculent sludge with high shock load resistance, the requirement on a PH value of inflow water is low, granule sludge increases quickly, the processing energy consumption is low, the processing efficiency is high, the effluent quality is stable, and the double-circulation anaerobic reactor is simple to operate and convenience to run.

The invention mainly discloses a middle-set type high density sediment water purification tank and a purification technology thereof. The middle-set type high density sediment water purification tank comprises a reaction region, a clarification region and a sludge transfer tank. The reaction region comprises a mixing tank and a flocculation tank; the clarification region comprises a pre-sedimentation region, a sludge concentration region, an inclined pipe sedimentation region and a clear water canal, wherein the sludge concentration region is arranged at the bottom of the clarification region, the inclined pipe sedimentation region is arranged above the clarification region, and the clear water canal is connected with a water outlet pipe through a finger type water collecting tank positioned above the inclined pipe sedimentation region. A plurality of conical sludge collecting pits are arranged at one side of the bottom surface of the clarification region, and a sludge scraper is arranged on the bottom surface of the clarification region; a gas stripping device which lifts sludge in the sludge collecting pit to a sludge discharging groove at the upper part of the clarification region is arranged in each sludge collecting pit; the gas stripping sludge discharging groove is connected to the sludge transfer tank; the sludge transfer tank is connected with a water inlet pipe through a reflux pump; and simultaneously, the sludge transfer tank is connected with a sludge pump. The middle-set type high density sediment water purification tank has the advantages of having simple tank shape, compact structure and water outlet quality, being beneficial to the control on a sedimentation tank and the concentration and number of returned sludge, ensuring the stability of operation conditions and being low in operating cost.

The invention discloses a powdered carbon backflow and carbon / sand filter combined process for treating polluted water, which belongs to the field of water treatment. A device comprises a mixing tank, a flocculating tank, a settling pond and a carbon / sand filter which are connected in series in turn, wherein powdered active carbon and a coagulant are added in raw water to be treated, and the raw water is mixed with the coagulant in the mixing tank; the mixed raw water enters the flocculating tank to undergo a flocculation reaction and then enters the settling pond to undergo solid-liquid separation, active carbon mud settled in the settling pond is concentrated in a mud storage chamber and flows back to the mixing tank or flocculating tank by a reflux pump, the concentrated active carbon mud flows back to the mixing tank when the coagulant is added and flows back to the flocculating tank when the coagulant is not added; and water after the settlement enters the carbon / sand filter, the granular active carbon is filled on the upper layer of the carbon / sand filter, and quartz sand is filled in the lower layer. In the invention, a powdered carbon backflow process is adopted, so that over 50 percent of medicinal preparation can be saved; and the physical absorption effect, biological degradation effect and strengthening coagulation effect of the active carbon act in coordination, and the carbon / sand dual-layer filter has the physical absorption and biological degradation effects at the same time.

The invention relates to a pharmaceutical wastewater technology using microelectrolysis-Feton-EGSB (expanded granulate sludge bed)-A / O (anaerobic / aerobic)-BCO (biological contact oxidization)-BAF (biological aeration filtration)-coagulation treatment. High-concentration pharmaceutical wastewater is sequentially sent into an oil separation tank, a conditioning tank, a microelectrolysis reaction tank, a Feton catalytic oxidation tower, a horizontal flow type primary settling tank, a comprehensive conditioning tank, a hydrolysis acidifying tank, the EGSB, an A / O tank, a two-stage BCO tank, a secondary settling tank, a BAF tank, a coagulation tank, an air floating tank and a final settling tank to be treated, and then is drained after the standard is reached. The technology has the advantages that the technique is matured, the treatment effect is stable, and the anti-impact ability is strong; after the pharmaceutical wastewater is treated by the combined technology, the quality of drained water can reach the class-one standard of Comprehensive Drainage Standard of Wastewater (GB8978-1996).

The invention discloses a PAC-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PAC-PDMDAAC compound coagulant is prepared as the following steps: the PAC dry powder or solution is arranged in a mixing reactor, and water is added to obtain a PAC solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PAC-PDMDAAC. The application of the PAC-PDMDAAC compound coagulant is to adopt the PAC-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PAC-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PAC-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention discloses a device and a method for processing restaurant wastewater. A ferrallitic sheet is used as an anode and a graphite sheet is used as a cathode to carry out pulse direct current electrolysis on the restaurant wastewater so as to cause an electrocoagulation reaction; simultaneously ultrafine ozone bubbles are fed into an electrocoagulation reaction region to strengthen the electrocoagulation reaction, so that ferrous irons Fe2+ generated in the electrolysis process is rapidly converted into ferric irons Fe3+, the volume of flocculate becomes larger and the flocculate precipitates more efficiently to remove most of pollutants in the wastewater; sludge generated in the electrocoagulation process enters an activated sludge reactor and a sludge concentrating and extruding device; and clear water containing a little amount of organic matter enters an aeration-ozone-ultraviolet combined treatment degradation tank and a photocatalyst micro filtration membrane, and finally outflows through a fine porous sand filtering tank. The produced water can reach the primary standard in the industry. The processing method has high impact-load resistance. The outlet water quality is stable. In the engineering, consumables have long service life. Therefore, the processing cost of the restaurant wastewater can be greatly reduced.

The invention discloses a PFS-PDMDAAC compound coagulant, a corresponding preparation method and an application method. The PFS-PDMDAAC compound coagulant is prepared as the following steps: the PFS dry powder or solution is arranged in a mixing reactor, and water is added to obtain a ferric-salt PFS solution which is stirred under normal temperature and a PDMDAAC colloid is added into the solution; the mixed solution is stirred under normal temperature till the PDMDAAC colloid is completely dissolved to obtain a stable PFS-PDMDAAC. The application of the PFS-PDMDAAC compound coagulant is to adopt the PFS-PDMDAAC compound coagulant for the coagulation treatment to raw water and waste water and sewage and the dehydration treatment to sludge or silt directly or after dilution with water by any proportion. The component structure and content scope of the invention are distinct to guarantee the capability and stability of the obtained PFS-PDMDAAC compound coagulant, and the materials on industrial manufacturing are available. The various functions of the PFS-PDMDAAC compound coagulant can be adjusted during water treatment with high adaptability so as to reduce cost, reinforce coagulation effect and dramatically enhance the quality of obtained water.

The invention belongs to the field of sewage ecological treatment, and the purpose is to provide a device and a method for sewage decentralized treatment in circulating vertical flow constructed wetlands. The invention comprises the following aspects: 1) the high-efficient circulating vertical flow constructed wetland system comprises three main components of a vertical flow constructed wetland, a circulating water tank, and a reinforced adsorption column; 2) the operation modes comprise an intermittent mode and a continuous mode. Fillers of the constructed wetland are proportional compositions of several fillers which are low in price and high in adsorption capacities for nitrogen and phosphorus; plants which have strong durability against pollution and have landscape value (thalia dealbata or day lily) or economic value (hybrid pennisetum) are planted on the wetland surface. The invention adopts the high-efficient filler composition to reinforce nitrogen and phosphorus adsorption; effluent backflow increases the dissolved oxygen inside the vertical flow constructed wetland, and enhances the nitration capability of microbes in the wetland; the denitrification capability is enhanced; the contact time of sewage and the fillers is increased; and the removal of phosphorus is enhanced. Series-parallel combinations can be selected flexibly with respect to different sewage types, and the applicability is strong.