213results about "Multistage water/sewage treatment" patented technology

The invention discloses a rapid treatment method for a fracturing flowback fluid. The rapid treatment method comprises: (1) pumping a fracturing flowback fluid into an electron beam irradiation chamber, and staying for 20-120 s in the electron beam irradiation chamber; (2) adding a coagulant and a flocculant into the sewage treated by the electron beam irradiation chamber, and clarifying in a flocculation precipitation pool; (3) feeding the water treated by the flocculation precipitation a precision filtration pool, and carrying out fine filtration; and (4) collecting the water filtered by theprecision filtration pool in a clear water pool. According to the present invention, the gel breaking stage uses physical gel breaking so as to achieve clean gel breaking and greatly reduce the sideeffects of external agents, such that the reuse quality of the fracturing flowback fluid is good, and the fracturing flowback fluid is safe; the gel breaking time is shortened from 5-120 min to 20-120s so as to greatly improve the gel breaking speed; and compared with the traditional chemical gel breaking method and the biological gel breaking method, the method of the present invention simplifyfeeding equipment and other supporting equipment, reduces the occupation area, and reduces the complexity of manual operation.

The invention relates to a garlic wastewater treatment method and a device. The garlic wastewater treatment device comprises a wastewater regulating tank, an advanced oxidation reaction sedimentation tank, a multistage hypoxic and anaerobic reaction tank, an aerobiotic contact oxidation tank and a multilayer aerobiotic activity filtration tower, wherein the advanced oxidation reaction sedimentation tank comprises a mixing region and a sedimentation region; the multistage hypoxic and anaerobic reaction tank comprises a facultative section, a hypoxic section and an anaerobic section; an aeration controlling system is arranged at the middle lower part in the aerobiotic contact oxidation tank and comprises an aeration disc, an air blower and a dissolved oxygen measurement controlling device; and the multistage hypoxic and anaerobic reaction tank adopts multistage arrangement, particle sizes of a filter material are gradually decreased from top to bottom, an air inlet, a water collection groove and a water outlet pipe are arranged at the bottom of the filtration tower, and disinfection equipment is installed at the upper part of the water collection groove and is connected with a chloride dioxide generator. The garlic wastewater treatment device has a simple structure, is lower in manufacturing cost, is suitable for sewage treatment of larger volume and has very good treating effect to garlic wastewater.

The invention discloses a method and a system for modularized combined treatment of high-difficulty organic waste water, and the treatment system comprises: a primary settling tank, an adjusting tank, a reinforced flocculation tank, a precipitation separation tank, a secondary flocculation settling tank, a buffering water tank, a pH adjusting tank, a primary honeycomb microelectrolytic tank, a flocculation settling tank, a secondary honeycomb microelectrolytic tank, an intermediate tank, a heat exchanger, a microwave catalytic oxidation device, a secondary catalytic oxidation pot, and a re-oxidation filter pipe. The treatment method adopts a combined technical scheme of a multistage honeycomb iron carbon microelectrolytic module, a reinforced flocculation module and a microwave electro-catalytic oxidation module; the invention has the characteristics of high applicability, good treatment effect, and unit modularization; the modules can be combined and cascaded freely according to the waste water condition, and thus different waste water treatment effect requirements and waste water quantity requirements are adapted; the operation cost is low; the sludge amount is low; no secondary pollution is caused; and the method is an environment-friendly high-difficulty waste water treatment method.

A wastewater treatment method and apparatus including a denitrification (anoxic) chamber for denitrifying wastewater, an aeration basin with Bio-Wheel for aerating the wastewater, and a membrane device in which sludge particles are separated out of the wastewater, leaving clean discharge water and reusable sludge. Sludge from the membrane chamber floor is sent back to the aeration basin or denitrification chamber or both. Excess sludge is wasted or held for further processing. Preferably, the method and apparatus facilitate both activated sludge and fixed film processes.

The invention relates to an enzyme treatment technique of difficult degradation organic sewage, belonging to the sewage treatment technical field. Coupling of an enzyme-reduction cocatalyst is employed at appropriate temperature and pH value, thereby catalyzing oxygen to generate superoxide radical and hydroxyl radical with extremely strong oxidation capacity, so as to remove organism from water. When the sewage is treated by the coupling of the enzyme-reduction cocatalyst, no peroxide is added; and air or oxygen is continuously led in, so as to generate hydroxyl radical with higher oxidation-reduction potential. The enzyme treatment technique is applicable to treatment of difficult degradation organic pollutant other than phenol and aniline in the sewage; in addition, the enzyme treatment technique has high removing efficiency and low treatment cost.

Treated water with good water quality which can be discharged or reused is obtained by efficiently removing SS, fluorine, cyanogen, selenium, ammonia, and COD components contained in coal gasification wastewater such as gas washing wastewater generated in a coal gasification step. A method of treating coal gasification wastewater comprising steps (1) to (4), wherein the step (1) is performed prior to the step (2): (1) a fluorine removal step in which fluorine is removed by coagulation sedimentation; (2) a cyanogen decomposition step in which cyanogen is decomposed by wet oxidation or thermal hydrolysis; (3) a selenium treatment step in which selenate ions are subjected to a reduction treatment with a metal reductant; and (4) a COD/ammonia removal step in which COD and/or ammonia are/is removed.

The invention discloses a scale advanced treatment method for livestock and poultry farming waste water. The method of the invention comprises the following steps: (1) adding acid to the livestock and poultry farming waste water after biological treatment, and regulating the pH value of the waste water to be less than or equal to 5.0; (2) adding H2O2 and soluble ferrite to the waste water to carry out oxidation reaction, wherein the mol ratio of the H2O2 to the Fe<2+> in the soluble ferrite is between 1:1 to 2:1; and (3) after carrying out reaction for not less than 10 minutes, adding alkali to reaction liquid, regulating the pH of the reaction liquid to be greater than or equal to 6.0, carrying out flocculating and depositing, and then discharging deposit and waste water according with the discharge standard. By controlling the pH value of the reaction system, the adding proportion of the H2O2 to the FeSO4, and the running time, the invention achieves the treatment effect and optimization of energy consumption. The process effectively oxidizes and decomposes the trace organic pollutants (incretion interferents, antibiotics and the like), simultaneously removes various heavy metals and phosphorus by coagulating sedimentation, inactivates pathogenic bacteria in the waste water, and realizes integrated high-efficiency reinforcement treatment of the livestock and poultry farming waste water.

The invention discloses a method for constructing a multi-stage subsurface flow constructed wetland system, and the method comprises the following steps: (1) selecting a littoral zone with a slope as a wetland pond or digging and backfilling to get a wetland pond with a slope; (2) grading and filling a matrix, namely designing stages according to the pollution load and the height difference of slope, and filling the matrix in each stage of the wetland; (3) arranging drainage holes, water outlet holes and water inlet holes; (4) planting plants, namely planting the plants on each stage of the wetland respectively. The method disclosed by the invention has the following beneficial effects: (1) the system constructed by the method has no influence on the coastal zone structure of a landscape water body. (2) the system constructed by the method has a better purification effect on water flowing into rivers and water contaminated by the landscape water body, especially has an obvious purification effect on pollutants such as SS (Stainless Steel), oil and COD (Chemical Oxygen Demand) and has a good removal effect on heavy metals, TN and TP. (3) the system constructed by the present invention can integrate the purification function with the greening of coastal zones, so that the diversity of landscape is enriched and the overall landscape effect is improved.

The invention relates to the technical field of water treatment, and particularly relates to and discloses a treatment method for recycling high-hardness and high-salinity waste water. The treatment method comprises the following steps: (1) removing organic matters, softening and removing salt for the first time by using a primary treatment system; (2) removing organic matters, softening and removing salt for the second time by using a secondary treatment system; (3) performing evaporation and freezing crystallization treatment on concentrated liquid. According to the treatment method for recycling high-hardness and high-salinity waste water, a physical and chemical treatment and membrane integrated technology and an evaporation and freezing crystallization technology are combined, high-quality water can be recycled, the resin is softened to regenerate internal supply of an acid and alkali medicament, industrial salt is generated, resources are utilized effectively and comprehensively,long-term effective and stable operation of the system is guaranteed, and the advantages of good treatment effect, stable and reliable operation and capability of completely utilizing resources are achieved.

A water treatment system is provided including a disinfection system, a filter and a turbine generator. A manual pump is positioned downstream of the filter to create negative pressure to draw water through the filter. The manual pump also creates positive pressure to dispense treated water from the outlet of the system. The movement of the water through the system powers the turbine generator. The power generated can be used to monitor a characteristic of the water treatment system.

The invention provides a combined treatment method of leachate and excrement wastewater due to high contents of organic matters and phosphor but insufficient nitrogen in the excrement wastewater and high contents of organic matters and nitrogen but insufficient phosphor in the leachate. Therefore, nitrogen and phosphor in the excrement wastewater and leachate are complemented with each other, nutrient elements required by microbes are balanced, and a biological treatment method is suitable for treatment. According to the method, biological treatment, membrane separation treatment and reverse osmosis deep treatment are adopted, so that the treated discharge water is in accordance with the first-grade requirement of the GB8978-1996 Comprehensive Sewage Discharge Standard of People's Republic of China.

The invention discloses a double-alkali neutralization treatment method of heavy metal-containing acidic wastewater. According to the double-alkali neutralization treatment method, sodium hydroxide is mainly used for adjusting a pH value so that metal ions in acidic wastewater form precipitates, the precipitates are recovered, the recovered metal sludge is treated and then can be used as metal oxides for next use, through lime use, fluorine ions in the wastewater form precipitates, and the precipitates do not contain heavy metals and can be treated by a common sludge treatment method. The sludge treated by the double-alkali neutralization treatment method is not used as dangerous waste or can be used as a fluorite-like accessory material, and the rest of the wastewater satisfies discharge standards by slight treatment.

The invention discloses a hospital sewage treatment system which comprises a grating well, a pre-disinfecting tank, a septic tank, a pre-aeration adjusting tank, an anoxic tank, a bio-contact oxidation tank, a vertical flow sedimentation tank, a quantitative tank, a purifier, a contact disinfecting tank and a dechlorination tank which are arranged in the sewage flow direction and communicate with each other through pipelines. The grating well communicates with a hospital sewage drainpipe. Processed hospital sewage passes through the dechlorination tank and is then discharged. The system provided by the invention has high degree of automation, is convenient to manage, and is adopted to reduce operating personnel. In comparison with a traditional sewage station management system, the system provided by the invention has the following advantages: energy is saved; operation time is reduced; work schedule of personnel and labor intensity are decreased; the purifying effect is good; and emission targets after processing reaches the national emission standard.

The invention relates to a method for removing bromate in water through oxidation reduction and a system thereof. The method comprises the following steps: firstly, controlling the dissolved oxygen concentration in the water at a lower level through the nitrification of ammonia salt and microbes on the active carbon; secondly, removing the bromate in the water through the reducibility of ferrous sulfate; and finally, removing excessive ferric ions in the water through a filtering unit. The system comprises a pretreatment working section for controlling the dissolved oxygen in the water, an oxidation reduction working section for removing the bromate and a filtering treatment working section for removing the excessive ferric ions, wherein the pretreatment working section is connected with the oxidation reduction working section, and the oxidation reduction working section is connected with the filtering treatment working section. The method can effectively remove the bromate in the water with a bromate removal rate of above 60 percent. The system has convenient operation and low running cost, can also be integrated with other technologies, and have very high practicability.

A water disinfection delivery treatment system first filters the supply by a particle and then a carbon filter. The partially treated flow is split in two and a first part passes through a first cutoff valve and is fed into a disinfection (iodine) chamber, filter or feeder via a flow restricter. The chamber output passes through a second solenoid driven cutoff valve. The second part is fed to a third cutoff valve and this valve's output is summed with the second valve's output and then fed into a holding tank. The tank retain's a volume such that the water remains therein for at least a period sufficient to permit a minimum 3 log reduction of pathogenic microbes. A final carbon filter is downstream of the tank as is a meter and dispenser. A method is also provided for delivering potable drinking water.

The invention discloses a hexavalent-chromium wastewater treatment technology. The hexavalent-chromium wastewater treatment technology includes the steps that hexavalent chromium in wastewater is reduced to trivalent chromic ions through sodium hydrogen sulfite with the oxidation-reduction method, the PH value is adjusted, and trivalent chromium forms chromic hydroxide to be removed in a precipitation method accordingly. Compared with other treatment methods, the method is low in device investment and operating cost, easy to operate and suitable for hexavalent-chromium wastewater treatment of the electroplating industry, the printing and dyeing industry, the pharmaceutical industry, the light and textile industry, the chemical industry and the like, wastewater is sustainably treated on the spot, and pollution of the industry to the environment is reduced; meanwhile, the economic benefits of enterprises are increased, and the win-win effect is achieved.

The invention relates to a water purifying device capable of rapidly replacing a filter element. The water purifying device comprises a filtering core and a water purifier body, wherein the filtering core comprises a plurality of filter elements for filtering and purifying water; a cylindrical shell is arranged outside the filtering core, and a water inlet and a water outlet are formed in two ends of the shell; the shell is formed by two hollow semi-cylinders, the inner wall of each semi-cylinder is provided with a leak-proof pad for preventing the water leakage, and an installation groove matched with the appearance of the filter element is formed in the leak-proof pad; the shell also comprises flanges which are positioned on the semi-cylinders and used for locking the shell by virtue of screws; when the filter elements need to be replaced, only the screws on the flanges need to be disassembled, and then the shell is opened, so that convenience in installation and disassembly is realized; and the integral structure is simple, and the cost is low.

The invention relates to a water treatment process and in particular relates to a butadiene styrene rubber wastewater treatment process. The process sequentially comprises the following steps: allowing butadiene styrene rubber wastewater with the CODcr of 800-1000mg/l and the SS of 100-150mg/l to flow through a cross flow type coalescent pack area at the flow of 1-3m<3>/m<2>.min, and adding a hydrogen peroxide oxidizing agent and a ferrous sulfate catalyst into the cross flow type coalescent pack area for carrying out a catalytic oxidation reaction; adding a flocculating agent into the reacted wastewater, performing electrical neutralization or double electrode layer compression on the added flocculating agent and colloidal particles in water for agglomeration and destabilization, agglomerating the destabilization particles to form a primary micro flocculating constituent; adding electrolyte and a coagulant with charged particles opposite to the electrolyte, neutralizing the charged particles in the water, so that the particles are agglomerated into the flocculating constituent; separating by adopting an inclined tube settling basin and under the action of gravity, thereby obtaining effluent with the CODcr of less than or equal to 400. The reaction conditions are mild, the treatment effect is stable, the B/C ratio of the treated effluent is improved to be over 0.3, and the process is suitable for a subsequent biochemical treatment system.