40results about How to "Reduce SS" patented technology

The invention discloses a 'technique for conditioning sludge by using the synergic action of Fenton reagent and polyacrylamide', and mainly aims to overcome the defects in sludge dehydration conditioning of urban sewage treatment plants at present. The invention provides a sludge conditioning combined technical process which can effectively degrade organic substances, realize sludge reduction, effectively release combined water and cell internal water difficult to be dehydrated in the sludge and improve the dehydration performance of the sludge. In the technique, the oxidizing action of the Fenton reagent and the strong flocculation of CPAM (cationic polyacrylamide) are fully combined and used to enhance the dehydration performance of the sludge and improve the solid-liquid separation ratio in sludge dehydration. Through conditioning, the water content of the sludge after centrifugal dehydration is reduced from 87.7 percent to 79.3 percent, and the mud cake output is reduced from 0.218t/m<3> to 0.128t/m<3>.

The invention discloses a treatment method of printing ink wastewater generated in circuit board production. The treatment method comprises the following steps: firstly guiding printing ink raw wastewater generated in circuit board production into a raw water collecting tank, carrying out water quality equalization, then pumping into a reaction tank in the step two, coagulating so as to form muddy water mixed liquid of flocs, feeding the muddy water mixed liquid into a plate-and-frame filter press, carrying out solid-liquid separation, pumping filtrate into a Fenton oxidization/ultraviolet tank in the step four, carrying out oxidative degradation, electrolyzing, entering the electrolyzed wastewater to a membrane filtration device, and further carrying out biochemical treatment on the wastewater filtered by using a membrane. The treatment method can be used for effectively removing COD, ammonia nitrogen, total phosphorus and heavy metals in the printing ink wastewater generated in circuit board production, effectively preventing membrane pollution, continuously and effectively carrying out wastewater treatment and ensuring the final discharged water of the printing ink wastewater generated in circuit board production to meet the primary standards of Guangdong province water pollutant emission limits (DB44/26-2001).

The invention discloses an electrolysis unit with a membrane filtration function and relates to an electrolysis unit. The electrolysis unit is provided with a shell and an electrode set, wherein a water inlet and an air inlet are arranged on the bottom part of the shell, and the water inlet is connected with a water inlet pipeline through a pipeline; the air inlet is connected with an aerating apparatus through a pipeline; an overflow opening and a drain outlet are respectively arranged on the upper part and the lower part of the shell, and the overflow opening and the drain outlet are connected with an external blow-off line through pipelines; the electrode set is provided with a bracket, a cathode, an anode and a water outlet; the electrode set is fixed on the shell through the bracket,the cathode is a metal membrane component with filtering and separating functions, and the anode is one of metal anode, alloy anode, carbon anode and titanium anode, and the like; and a connecting plate connected with a power supply is arranged on one end of the cathode, an anode binding post and a cathode binding post are arranged on the connecting plate, a filtration water collecting pipe and afiltration back wash pipe are arranged on the other end of the cathode, the filtration water collecting pipe is connected with a water suction pump, and the filtration back wash pipe is sequentially connected with a back wash pump and a chemical feed pipe. The electrolysis unit integrates electrolysis and membrane filtration functions.

The invention provides a nano-catalysis, electrolysis, flocculation and air-floatation device. A coagulative precipitation tank, a primary air-floatation tank, an electrolytic air-floatation tank and a slag-discharging tank are arranged in a housing of the device, wherein the top of the coagulative precipitation tank is provided with a water inlet and a mixer; the bottom of the coagulative precipitation tank is communicated with the primary air-floatation tank; a side sewage-draining outlet is connected with a sewage-draining pipe; a dissolved gas release pipe is arranged at the edge of the primary air-floatation tank; the sewage-draining outlet is connected with the sewage-draining pipe; the upper portion of the inner side of the primary air-floatation tank is communicated with the electrolytic air-floatation tank; the electrolytic air-floatation tank is divided into an upper layer and a lower layer by an upper-lower separator plate; a slag-scraping device is arranged in an upper gas-liquid separation chamber; an electrolytic cell is mounted between the upper layer and the lower layer of the electrolytic air-floatation tank; the bottom of the electrolytic cell is fixed on the inner bottom of the casing; the top of the electrolytic cell is open and horizontal with the top of the upper-lower separator plate; an electrode is installed in the electrolytic cell; and an interval between an anode and a cathode of the electrode serves as a water passage. The device integrates multiple functions of electrolysis, flocculation precipitation, air-floatation and the like together, has high automation degree, sewage-discharging efficiency and low running cost, and is convenient for operation and maintenance.

The invention discloses an electrode bio-membrane reactor capable of synchronously removing nitrate and hexavalent chromium in water. The electrode bio-membrane reactor comprises a cylindrical reactor body; the bottom of a cylindrical water collector is arranged in an internal fixed block; small holes are formed in the wall of the lower part of the cylindrical water collector; the bottom of a cathode material ring is arranged between the internal fixed block and a middle fixed block; the bottom of an anode material ring is arranged between an external fixed block and the inner surface of the reactor; a water bath jacket is arranged on the outer part of the cylindrical reactor body; a circular plate is arranged on the upper part between the water bath jacket 1 and the cylindrical reactor body; the upper end of the water bath jacket is connected with a cover body in a sealing manner; biological carriers are arranged in the small holes in the surface of the cylindrical water collector movably; and biological carriers are arranged between the cathode material ring and the anode material ring. The reactor can promote the contact between pollutants and microorganisms. The cost is low, and secondary pollution is reduced. The electrode bio-membrane reactor has a simple structure, is convenient to operate and easy to run and maintain. The electrode bio-membrane reactor can synchronously and efficiently remove composite pollution nitrate and hexavalent chromium.

The invention relates to an industrial wastewater treatment technology and device, and in particular, relates to a desulfurization wastewater reverse osmosis reconcentration device; an inlet of a precipitation pool communicates with an outlet of an oxidation pool and an inlet of a multi-medium filter; an outlet of the multi-medium filter communicates with an inlet of an electrodialysis device; a concentrated water outlet of the electrodialysis device communicates with an inlet of the oxidation pool; a fresh water outlet of the electrodialysis device communicates with an inlet of a reverse osmosis device; a fresh water outlet of the reverse osmosis device communicates with the inlet of the precipitation pool and the inlet of the oxidation pool; a concentrated water outlet of the reverse osmosis device communicates with an inlet of an evaporation crystallizer; an outlet of a first drug feeding box communicates with the inlet of the oxidation pool; an outlet of a second drug feeding box communicates with an inlet of the precipitation pool. Salts and other components in desulfurization waste water of a thermal power plant can be effectively removed, and the components can also be recycled in a useful form.

A low-cost treating agent for printing and dyeing waste water is disclosed. The treating agent includes, by weight, 20-25 parts of polyacrylamide, 45-50 parts of fly ash, 12-18 parts of chitosan, 30-35 parts of straw powder, 25-30 parts of saw powder, 8-12 parts of sodium acetate, 12-16 parts of activated maifan stone, 15-19 parts of polymeric aluminum ferric sulfate, 3-6 parts of magnesium sulfate, 21-24 parts of a cation type starch derivative, 2-5 parts of glycerol monostearate, 6-10 parts of fluorite and 3-7 parts of sodium lignosulfonate. The invention also discloses a preparing method of the treating agent. The treating agent has efficient cleaning capability, can effectively reduce the COD, BOD, SS, ammonia nitrogen and chroma of sanitary sewage, has good treating effects, is convenient to use, and greatly reduces difficulty for treating the printing and dyeing waste water.

The invention belongs to the technical field of sewage treatment equipment, and particularly relates to integrated high-efficiency sewage treatment equipment for treating rural domestic sewage. The high-efficiency sewage treatment equipment is mainly composed of an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and the like. The high-efficiency sewage treatment equipment cansolve the problems that traditional anaerobic, anoxic and aerobic process integrated equipment is high in energy consumption during running, mud in the sedimentation tank easily runs away, and the concentrations of suspended matter and phosphorus of effluent exceed the standards; nitrification, denitrification, filtration and other advanced treatment are simultaneously conducted in a ceramsite filler area, and the effluent is stable and reaches the super-level-A emission standards.

The invention relates to an environment-friendly artificial wetland system for purifying dredging remained water/tail water. The environment-friendly artificial wetland system comprises a water level regulation pool, a wetland purification pool and an effluent collecting pipe, wherein the system forms a cuboid shape; the water level regulation pool is arranged at the front-end water intake part of the wetland purification pool; the effluent collecting pipe is arranged at the rear-end discharge part of the wetland purification pool; the reclaimed water/tail water enters the wetland purification pool after the water level regulation pool carries out suspended solid treatment on the dredging remained water/tail water; the reclaimed water/tail water is subjected to physical settlement and a series of biochemical reaction in the wetland purification pool for a period of time; the purified reclaimed water/tail water enters the effluent collecting pipe from the bottom of the wetland purification pool to discharge. The artificial wetland system is adopted to process the dredging remained water/tail water by combining with the actual condition of the dredging engineering, the environment-friendly artificial wetland system has the characteristics of being stable in effluent quality, strong in removal capacity on nutrient substances such as N, P and the like, low in construction and operation cost, convenient to maintain and manage, strong in impact load resistance, high in aesthetic value and the like, and the problem of beneficial use of dredging bottom mud containing high-content pollutants and organic matters can also be effectively solved.

A catalyst for modifying the sewage in oil field and refilling it is prepared from the active component chosen from the oxides of Fe, Ni, Mn and Cu and the carrier (SiO2 or MnO2) through immersing the carrier in the solution of soluble chloride containing metal ions or Mn(NO3)3, laying aside at 70-90 deg.C for 10-12 hr, baking, calcining and natural cooling.

The invention belongs to the technical field of microbial wastewater treatment, and particularly relates to a leather wastewater treatment system and a method. According to the leather wastewater treatment system and method, the purposes of effective denitrification and sludge reduction in leather wastewater can be achieved, the problem of blockage of inflow water of the jet flow water distribution mixing digestion system is solved, SS in the wastewater can be reduced, the investment is reduced by 60% compared with that of a conventional anaerobic tank, the heterotrophic nitrifying bacterium agent is easy to produce, materials are easy to obtain, the cost is low, the process is simple and economic benefits are huge.

The invention relates to an intelligent riverway water distribution method and system. The intelligent riverway water distribution method and system aim to effectively guarantee water quality of rivers in cities. According to the technical scheme, the intelligent riverway water distribution method comprises the following steps that (1) a hydrology-water quality online monitoring device and a water distribution purification device are mounted; (2) the hydrology-water quality online monitoring device and the water distribution purification device are connected with a PLC; (3) the PLC sends received data to a server; (4) an intelligent water distribution control platform makes a judgment according to hydrology-water quality monitoring results; (5) the PLC controls the water distribution purification device according to control signals. The intelligent riverway water distribution system comprises the hydrology-water quality online monitoring device, the water distribution purification device, the PLC, a data transmission module and the server. The hydrology-water quality online monitoring device and the water distribution purification device are connected with the PLC respectively, and the PLC is connected with the server.

The invention relates to a pretreatment device and method for colored crystal synthesis wastewater, and belongs to the field of wastewater treatment. The pretreatment device comprises two regulating tanks, two coagulating precipitation tanks, two intermediate tanks and two ferric carbon reaction tanks. The pretreatment method comprises the following steps: firstly, homogenizing and averaging high-concentration and low-concentration wastewater through the two regulating tanks; secondly, carrying out coagulating precipitation, acid modulation treatment and internal electrolysis treatment; thirdly, carrying out acid modulation treatment and internal electrolysis treatment again; finally, carrying out coagulating precipitation again. The wastewater pretreated by the device and the method can meet the biochemical treatment requirements.

The invention discloses a fast infiltration system used for rural sewage treatment. The system is composed of an upper layer and a lower layer, wherein a lower-layer tank body is composed of a gratingditch, an oil removal sedimentation tank, an adjusting tank and a water outlet tank, an upper-layer tank body is a fast infiltration tank, the fast infiltration system used for rural sewage treatmentis further provided with an external fan, the fast infiltration tank comprises a water collection layer and a plurality of infiltration layers from bottom to top, the water collection layer comprisesa water gathering layer, a middle bearing board and a dephosphorization layer from bottom to top in sequence, the water gathering layer is connected with a water outlet tank through a water gatheringpipe, the infiltration layers comprise bottom bearing boards, lower infiltration layers, transition layers and fast filtering layers from bottom to top in sequence, air distributing pipes are arranged on the lower infiltration layers, each air distributing pipe is connected with an air distribution header pipe, an air source is from the external fan, water distribution pipes are arranged on the fast filtering layers, and each water distribution pipe is connected with a water distribution header pipe; a reflux pump is arranged in the water outlet tank. By means of the fast infiltration systemused for rural sewage treatment, the concentration of pollutants which enter the fast infiltration tank is reduced, sewage short flows, orifice blocking and filler hardening are reduced, and maintenance workloads of workers are reduced.

The invention discloses a treatment agent applicable to food industry sewage and a preparation method therefor. The treatment agent is prepared by employing urea-formaldehyde resin, tert-butyl methacrylate and sodium carboxymethyl starch as main ingredients, adding polyaluminosiloxane, high-nitrogen polyisobutylene succinimide, dodecyl dimethyl benzyl ammonium chloride, triethanolamine, acryloyl morpholine, borax, ferric sulfate, gallic acid, xylanase, phanerochaete chrysosporium powder, an initiator and a coupling agent, and carrying out procedures such as ultrasonic treatment, high-temperature calcination, mixed ball-milling, high-temperature stirring, sprinkling granulation and low-temperature drying. The prepared treatment agent can be used for remarkably reducing COD, BOD, SS and ammonia nitrogen values of the food industry sewage, can meet the requirements of industry and has a relatively good application prospect.