36results about How to "Strong adaptability to water quality changes" patented technology

The invention relates to a treatment process of copper-iron-contained high-concentration acidic mine wastewater. The treatment process comprises the following sequential process steps: (1) neutralization to remove iron; (2) solid-liquid separation; (3) biological sulfuration; (4) solid-liquid separation; and (5) biological purification for recovering valuable constituents in the wastewater and enabling yielding water to achieve an emission standard. The invention has the advantages of high removal rate of copper, iron and sulfate radicals, strong suitability, low treatment cost, environmental protection, good comprehensive recovery utilization effect, and the like and is particularly suitable for treating the copper-iron-contained high-concentration acidic mine wastewater generated in the copper-extracting production process by a biological wet method and in the mining process of copper sulphide.

The invention relates to a copolymerization flotation-sedimentation tank. The copolymerization flotation-sedimentation tank comprises a multi-channel folded plate copolymerization flocculation basin, a flotation-sedimentation tank and an air dissolving system, wherein the multi-channel folded plate copolymerization flocculation basin is used for realizing the coagulation and the copolymerization of flocculates and microbubbles; the flotation-sedimentation tank is connected to the rear end of the multi-channel folded plate copolymerization flocculation basin and is used for separating foamed flocculates from water flow and precipitating settleable flocculates which cannot float; and the air dissolving system is connected with a water outlet end of the flotation-sedimentation tank and is connected with the multi-channel folded plate copolymerization flocculation basin and the flotation-sedimentation tank to supply high-pressure backflow gas dissolved water to the multi-channel folded plate copolymerization flocculation basin and the flotation-sedimentation tank. According to the copolymerization flotation-sedimentation tank, the high-pressure backflow gas dissolved water is fed for three times, by virtue of organic combination with a flocculation process, a microbubble and flocculate copolymerized environment is created, and the produced foamed flocculates are stable and are not easily separated, so that the problems that the adhesion efficiency of particles is low, the trapping effect is not ideal, the adhesion of the foamed flocculates is instable, and the like of a traditional dissolved air flotation process are solved, and the coagulation, air floatation and sedimentation processes are organically combined and integrated; and the copolymerization flotation-sedimentation tank has prominent superiority in the treatment of water quality in high-algae, low-turbidity and burst high-turbidity reservoirs.

The invention relates to a wastewater and sludge treatment technique, which particularly provides a sludge and wastewater free treatment system. The system comprises grilles, an aerated grit chamber, a hydrolysis acidification pond, an oxidation pond and a secondary sedimentation pond which are orderly connected, and the system also comprises a disinfection pond, a slag pond, a slag concentration tower and a sludge dewatering machine. When the system is operated, the wastewater passes through wide and narrow grilles to remove large impurities and enters the aerated grit chamber for sedimentation treatment, the discharged water enters the hydrolysis acidification pond; by a sludge bed in the hydrolysis acidification pond, the wastewater and reflux slag sludge are captured and the slag sludge is decomposed; the wastewater after the sedimentation treatment passes through a fixed type biological bed in the oxidation pond for biological treatment, the discharged water enters the secondary sedimentation pond for slag sedimentation, the discharged water after the slag sedimentation enters the disinfection pond for disinfection treatment, the water after the disinfection treatment can be discharged or reutilized, and the sedimentation slag is sent to the slag pond, and is concentrated by the slag concentration tower and is sent to the sludge dewatering machine for dewatering treatment. The sludge and wastewater free treatment system has the advantages of low equipment investment, low operating cost and good effect of wastewater treatment.

The invention provides a process for preparing desalted water for iron and steel plants with slightly polluted surface water as a water source, belonging to the technical field of sewage treatment and recycling. In the process, a high density sedimentation tank, an MBBR (moving bed biofilm reactor), a V-shaped filter and a deep membrane processing unit are adopted. The process is characterized in that the slightly polluted surface water enters a vortex-type grit chamber, an adjusting tank, a high density clarification tank, the MBBR and the physicochemical and biochemical processing units such as the V-shaped filter and the like in sequence after being lifted; the treated water enters an ultrafiltration device and a reverse osmosis device after becoming qualified; and finally the finished water is used by desalting users on the production lines of the iron and steel plants. The process has the advantages that the consumption of new water in the iron and steel plants can be reduced, the water resources can be saved, and the process is simple in flow and low in operating cost, has stable operation effects and achieves better economic and social benefits.

A process for treating the gas waste water and coking waste water by diatomite and active sludge includes such steps as loading said waste water in bioreactor, adding diatomite and active sludge, aerating, flowing in depositing pool, depositing and mud-water separation.

The invention relates to a charcoal circulation type co-coagulation flotation tank water purification system and method. Mechanical flocculation, dissolved air flotation and an inclined plate settling basin are organically combined so as to form copolymerization dissolved air flotation, and mechanical flocculation and dissolved air flotation are organically combined through a copolymerization dissolved air flotation process, so that the stability of bubble floc is improved. Ozone oxidation and biological activated carbon are organically combined, so that the decomposition ability of powder biological activated carbon on organic matters is greatly improved. Air flotation and ozone oxidation are organically combined, so that an ozone oxidation effect is greatly improved. Mechanical flocculation, copolymerization air flotation, the biological activated carbon and inclined plate settling are organically combined, so that under the conditions of effectively controlling the rotate speed, reducing the hydraulic loss and the like, an aquatic organic matter is removed, and the stable bubble floc is formed. The system provided by the invention is flexible in process and operation manner, can be beneficial for effectively reducing the operation cost, has the advantages of high adaptability to water quality change, high efficiency, convenience in operation and the like, and has a wide application prospect.

The invention discloses an alkali-added wet type oxidation catalytic desulfurization waste solution recycling method. The method comprises the following steps of: pressurizing a desulfurization solution into a filter via a pump, then entering a decoloring kettle, adding activated carbon to decolor the desulfurization solution, pressurizing into a sulfo-evaporation kettle through the pump via a decoloring storage tank, evaporating the solution to a certain concentration in the evaporation kettle, placing into the filter for filtering, then crystallizing filtrate, and finally separating in a centrifuge to obtain a Na2S2O3 product; and pressing the filtrate after centrifugation into a SCN-evaporation kettle through the pump via a storage kettle, evaporating the solution to a certain concentration in the evaporation kettle, placing into the filter for filtering, enabling the filtrate to enter the SCN-evaporation kettle for crystallization, then separating in the centrifuge to obtain a rough NaCNS product, performing two times of solution, decoloring, evaporation and crystallization on the rough product, and then separating in the centrifuge to obtain a final fine NaCNS product. According to the method disclosed by the invention, the mature and advanced filtration, concentration, crystallization and separation process flows are selected, and all process sections are mutually linked and supplement each other, so that the optimization of the whole process is achieved.

The invention relates to a water treatment coagulant aid and a preparation method thereof. When the raw water has special water quality of low temperature, low turbidity, low alkalinity and the like, the floccus forming speed and the floccus settling velocity are reduced along with reduction of water temperature; and the probability of particle impact is reduced in the water treatment flocculation process due to the reduction of the turbidity of the raw water so as to affect flocculation; therefore, the treatment of the water with low temperature, low turbidity and low alkalinity is a problem in water treatment. The invention provides the water treatment coagulant aid, which comprises the following raw materials in percentage by mass: 75 to 85 percent of alkali sodium silicate, 7 to 12 percent of potassium permanganate, 7 to 12 percent of potassium monopersulfate and 0.5 to 1 percent of citric acid, wherein the raw materials are prepared according to the proportion, and then the molten raw materials are mixed and stirred uniformly to form uniform transparent liquid. The water treatment coagulant aid has remarkable treatment effect on the raw water with low temperature, low turbidity and low alkalinity, can improve the effect of a coagulant, reduce the consumption of the coagulant, reduce the water treatment cost and effectively reduce the content of organic substances and the like in the water, has the function of removing color and smell, is easy to add, and does not need special equipment.

The invention discloses a packing coupling denitrification device and method for rural domestic sewage treatment. The device comprises an aeration tank, an iron-carbon biological denitrification tankand a sedimentation tank which communicate with one another in sequence; the aeration tank communicates with a sewage inlet pipeline; a biofilm Yulong filler and an iron-carbon filler are respectivelyarranged in the aeration tank and the iron-carbon biological denitrification tank; a flow guide plate is arranged at the communication position of the aeration tank and the iron-carbon biological denitrification tank; an air inlet main pipe separately communicates with the aeration tank and the iron-carbon biological denitrification tank and extends into the bottom of the biofilm Yulong filler and the bottom of the iron-carbon filler; the upper part of the aeration tank and the iron-carbon biological denitrification tank are respectively provided with exhaust holes; and a water outlet pipe and a sludge discharge pipe are arranged on the side wall of the sedimentation tank. Biological agents are respectively adsorbed in the aeration tank and the iron-carbon biological denitrification tankin modes of Yulong filler biofilm and iron carbon filler biofilm, so that particulate phosphorus, suspended solid (SS) and heavy-metal ion pollutants in the sewage are removed. The nitrogen and phosphorus removal effect is good, and influence of low C/N ratio on biological denitrification in a sewage treatment process is avoided.

The invention discloses a papermaking waste water treatment system. The papermaking waste water treatment system comprises a buffer pool, an oblique filter screen, a grit chamber, a high-speed filtering pool, a broken ice condensation pool, a rotary absorption pool, an aeration basin, a regulating pool, a biochemical reaction pool, a secondary sedimentation pool, a detention pool, an artificial fish pond, a water storage pool, a mud sump, a belt filter press and the like. The temperature in the broken ice condensation pool is subzero 5-15 DEG C. The removal rate of chemical oxygen demand of papermaking waste water treated by the system is up to 97.9%, the total nitrogen removal rate is up to 96.3%, the removal rate of the five-day chemical oxygen demand is up to 95.9%, the removal rate of suspended matter is up to 98.6%, the chroma removing rate is 98.1%, and the turbidity removal rate is up to 99.8%.

The invention discloses a paper mill production wastewater treatment method. Wastewater sequentially goes through a pretreatment water collection pool, a grating, a sand basin, a physical filtering pool, an ice gate, an electromagnetic adsorption pool, an air floatation pool, an acidifying pool, a contact oxidation pool, a secondary sedimentation pool, a constructed wetland treatment system, a recirculation storage pool, a mud storage pool and a belt filter press. The low energy consumption and environmental protection ice gate is adopted in the invention, is used in the papermaking wastewater treatment process for the first time, and has obvious removal effects on small solid suspension and unique organic matters difficult to remove in papermaking wastewater without adding chemical reagents. In the papermaking wastewater treated through the method, the removal rate of chemical oxygen demand is 98.1%, the removal rate of total nitrogen is 97.2%, the removal rate of five-day biochemical oxygen demand is 95.1%, the removal rate of suspensions is 96.1%, the chroma removal rate is 90.1%, and the turbidity removal rate is 98.8%.

The invention relates to a mechanical stirring type co-coagulation flotation coupled two-layer horizontal sedimentation tank water purifying system and a method thereof. Dissolved air flotation is organically combined with a two-layer horizontal sedimentation tank to form a novel floatation and sedimentation tank. Mechanical flocculation and the dissolved air floatation are organically combined through a co-coagulation flotation technology to form co-coagulation dissolved air floatation in order to enhance the stability of a bubble floc. The air floatation are organically combined with ozone oxidation to realize full contact with polluting substances in water in order to greatly enhance the ozone oxidation effect. Mechanical flocculation, co-coagulation flotation and two-layer horizontal sedimentation are organically combined, so the operation is convenient, and the stable bubble floc is formed while effectively controlling the rotating speed and reducing the water conservancy loss. The method has the advantages of flexible running manner, effective reduction of the running cost, high water quality change adaptability, simple structure, high efficiency, convenience in running, and wide application prospect.

The invention provides an electrode foil corrosion wastewater treatment system. The system comprises a pretreatment system, a tubular micro-filtration membrane system, a two-stage reverse osmosis system and a cleaning system, wherein the pretreatment system is used for adjusting the pH value of corrosion wastewater and decomposing pollutants in the corrosion wastewater for forming a concentrated solution; the tubular micro-filtration membrane system is used for receiving the concentrated solution conveyed from the pretreatment system and filtering suspended particles in the concentrated solution; the two-stage reverse osmosis system is connected with an output end of the tubular micro-filtration membrane system and is used for desalting a filtrate after filtration; and the cleaning systemis used for cleaning the tubular micro-filtration membrane system and the two-stage reverse osmosis system at regular time. The invention relates to an electrode foil corrosion wastewater treatment process. The process comprises the following steps: S10, adjusting the pH value of corrosion wastewater through a pretreatment system and decomposing pollutants; S20, filtering suspended particles of the concentrated solution to form a filtrate; and S30, desalting the filtrate. The electrode foil corrosion wastewater treatment system provided by the invention has the advantages of short reaction time, small occupied area and stable quality of outflow water.

The invention discloses a coagulant aid for sewage treatment. The coagulant aid is prepared from the following components in parts by mass: 12-25 parts of cationic polyscrylamide, 20-30 parts of polyaluminum chloride, 2-8 parts of modifier, 5-9 parts of disinfectant, 8-12 parts of antifoaming agent, 5-7 parts of alum, 18-25 parts of oxalic acid and 20-23 parts of distilled water. According to thecoagulant aid for sewage treatment and the preparation method of the coagulant aid disclosed by the invention, the cationic polyscrylamide acts to gather oil and suspended solids in sewage; the polyaluminum chloride realizes a function of enabling the suspended solids in the sewage to get larger so as to facilitate removal of the oil and the suspended solids. The coagulant aid has strong adaptability to the raw water quality change, and realizes a remarkable treatment effect on the raw water with low temperature, low turbidity and low alkalinity. Efficiency of an coagulant can be enhanced, the consumption of the coagulant is reduced, and the water treatment cost is lowered. The coagulant aid is easy to add without needing special equipment.

The invention provides a physical pretreatment system for paper mill wastewater and discloses a physical adsorption system for pretreatment of the paper mill wastewater. The system is characterized by comprising an adjusting collecting tank, a grating, a grit sedimentation tank, a physical filtration tank, an ice grating, an electromagnetic adsorption tank, a floatation tank, a mud storage tank and a belt filter press. The system adopts environment-friendly ice grating equipment with the low energy consumption, is applied to the papermaking wastewater treatment technology for the first time, and has obvious effects of removing organic matters and small suspended solids which are unique to papermaking wastewater and difficult to remove. According to the physical adsorption treatment system, no chemical reagent is added, no biological treatment method is adopted, sludge and strains are not introduced, the removal rate of the suspended solids is up to 96.1%, the removal rate of chromaticity is 90.1%, and the removal rate of turbidity is 98.8%.

The invention discloses a treatment method for papermaking waste water. Components comprise a buffer pool, an inclined filtering mesh, a grit chamber, a high-speed filter tank, a crushed ice condensate pool, a rotary adsorption pool, an aeration tank, a regulation pool, a biochemical reaction tank, a secondary settling tank, a staying pool, an artificial pond, a water storage tank, a sludge storage pond, a belt press filter machine and the like. The temperature inside the crushed ice condensate pool device is minus 5 DEG C to 15 DEG C. According to the waste water treated by the method disclosed by the invention, the removal rate of chemical oxygen demand reaches 97.9%. The removal rate of total nitrogen reaches 96.3%, the removal rate of five-day biochemical oxygen demand reaches 95.9%, the removal rate of suspended matters reaches 98.6%, the removal rate of chrominance reaches 98.1%, and the removal rate of turbidity reaches 99.8%.