71results about How to "Promote flocculation and sedimentation" patented technology

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method and a device for treating phosphorus wastewater by adopting a multi-electrode baffling electric flocculation process. The PH value of wastewater is regulated with alkaline liquor to 7.0-8.0; the regulated wastewater is pumped into an electric flocculation tank through a peristaltic pump, is subjected to electrolytic flocculation treatment through the baffling of a multi-electrode under the condition of aeration, and then is discharged through an overflow launder, the discharged water is collected and left to stand for 30 minutes, a liquid supernatant is discharged, a floc is recycled; a power supply of the electric flocculation tank is a direct current power supply, the current density is 1.27-5.08mA/cm<2>, and the electrolysis time is 2 minutes to 48 hours. The technical characteristics are as follows: the wastewater baffles along the multi-electrode, then the short stream of the wastewater is avoided, the chance of enabling a pollutant in the wastewater to be in contact with a high-concentration flocculating agent in an electrolysis plate is increased, the flocculent precipitation is promoted, so that the pollutant treatment effect is improved. The multi-electrode baffling electric flocculation process is suitable for treating inorganic phosphorus wastewater at medium and low concentrations, needed equipment is simple, easy in operation and low in cost, and runs stably, so that the process is an electrochemistry phosphorous removal process having a high potential.

The invention discloses a preparing method and application of positive ionic guar gum grafted copolymer retention and filter aid, which comprises the following steps: dispersing non-purified guar gum powder in the low-carbon alcohol/water solution, aerating nitrogen, stirring evenly at indoor temperature, adding positive ionic etherifying agent solution, dripping strong-alkaline catalyst, reacting at 40-75 deg.c to obtain positive ionic guar gum, allocating into colorless transparent solution, adding triggering agent, acrylamide and vinyl cationic monomer, adding adjuvant, reacting at 10-65 deg.c for 2-24h to obtain the product.

An aqualizing/unequalizing water-treating process includes such steps as equalization reaction between lime powder and raw water for softening it and removing salts, then tangentially flowing in a cyclone coagulating chember where lime powder is added to generate a lot of the active flocculates of multi-nuclear hydroxy calcium, generating big coagulations, deposition separation of water from coagulation, classifying water to obtain clean water, concentrating and separating the coagulations and dewatering. Its treating apparatus is also disclosed.

The invention discloses a method for treating wastewater containing heavy metal ions of vanadium, nickel, lead, chromium and a device by using the method. The method is characterized by comprising the following steps of: sending the wastewater containing the heavy metal ions of vanadium, nickel, lead, chromium into an electrolytic cell through a multidimensional electrochemical composite treatment device, wherein the heavy metal ions in the wastewater successively consume hydrogen ions, increase hydroxyl ions, and bind with the hydroxyl to generate hydroxides on an anode plate after the electrolysis of the wastewater, and sediment is separated out on an inclined-plate sedimentation tank under a proper PH value and the combined effect of a coagulant aid of polyacrylamide to remove the heavy metal content in the wastewater, so that the generated supernate no longer contains exceeding heavy metals, the supernate is then discharged, and therefore the wastewater does not cause secondary pollution, and the direct discharge of the treated wastewater does not cause any influence on the environment. The technology of the method is simple and easy in implementation.

The invention relates to the technical field of river channel cleanout and sediment treatment and discloses an environment-friendly river sediment dehydration drying boat which comprises a boat body and a power system, wherein the power system is arranged on the boat body and is used for providing power to the sediment dehydration drying boat; a sediment/garbage separation device, a sediment concentration tank, a sediment conveying pump, a belt type sediment filter press and a filtering tank are sequentially arranged and connected with the boat body according to a sediment treatment sequence;the sediment/garbage separation device is positioned above the sediment concentration tank; the belt type sediment filter press is positioned above the filtering tank. According to the boat, integralon-line treatment of rapid dehydration, solidification and residual water draining treatment on river sediment can be achieved. Therefore, the purposes of high efficiency and harmless river cleanout and reduction of residual water draining treatment can be achieved.

The invention discloses a multistage treatment device for alkali-decrement microfiber production wastewater, and belongs to the technical field of wastewater treatment.The multistage treatment device comprises a treatment box, an opening is formed in the top of the treatment box, a floating type filtering mechanism is fixedly arranged on the inner side of the opening, a hopper is further installed on the top of the treatment box, and a discharging pipe is connected to the bottom of the hopper and extends to the inner side of the treatment box; a quantitative feeding mechanism is fixedly arranged at the bottom of the discharging pipe; according to the sewage treatment device, sewage filtration is realized, impurities on the filter screen can be removed without power, the workload is reduced, the cleaning frequency of the movable filter screen is reduced, an equal amount of medicament can be automatically added according to a constant sewage amount, the sewage is in a static state in the treatment box, the flocculation effect of the medicament can be maximized, and the flocculation effect is good; the sewage treatment device is simple in structure, convenient to carry out continuous sewage treatment operation, capable of achieving full-automatic operation of sewage, high in sewage treatment efficiency, high in economic benefit, integrated, small in occupied area and convenient to manufacture and transport.

The invention relates to a combined process for enabling effluent COD, BOD5, NH3-N and TP indexes to reach ground surface IV-type water standard. The combined process comprises the following steps: acoarse screen and a primary lifting pump room module are used for carrying out primary filtration and sewage lifting; a fine grid and a gas stripping grit chamber module are used for filtering and removing sand again; a primary enhanced efficient clarification tank module is used for carrying out PAC and PAM sewage treatment reaction; a fine grid and a secondary lifting pump room module are used for filtering again and lifting the sewage to increase a water head; a primary biological aerated filter module decomposes COD, BOD and NH3-N in the sewage; a secondary biological aerated filter moduleperforms nitration reaction by utilizing NH3N in the sewage; and magnetic powder is added into a magnetic coagulation clarification tank module, sludge flows back, and tiny flocs wrap the magnetic powder, so that subsequent flocculation and sedimentation are facilitated. The process is suitable for low-concentration town sewage treatment, and reaches the ground surface IV-class water standard; and the two stages of lifting pump stations reduce the filling and excavation work amount during construction, and are particularly suitable for places with poor geological conditions.

The invention relates to a flocculating agent for treating printing and dyeing sewage and a sewage treatment method. The flocculating agent specifically comprises the following raw materials in partsby weight: 40-50 parts of acrylamide; 10 to 15 parts of bauxite; 0.2 to 1.0 part of active carbon; 3 to 5 parts of EDTA; and 0.5 part of a catalyst BiVO4. The sewage treatment method specifically comprises the following steps: adjusting the pH value of printing and dyeing sewage to 6.5-7.5, adding acrylamide, bauxite, activated carbon, EDTA andcatalyst BiVO4, stirring for 2-3 hours, standing for 12 hours until layering, and pumping out sludge by using a sludge pump. The sedimentation of macromolecular substances in the printing and dyeing wastewater is promoted, the separation rate of sludge and wastewater is effectively increased, the sedimentation effect is fast, the dosage is small, and the use is convenient.

The invention discloses a method for fixing flocculated and settled lipid yeast through microbial flocculant cooperating with activated carbon, belongs to the technical field of microorganisms, aims at utilizing characteristics of the activated carbon combined with microbial flocculation technology to flocculate and settle the lipid yeast and is is a method for fixing the flocculated and settled lipid yeast through the microbial flocculant cooperating with diatomite. The method includes the steps of treatment of the activated carbon, preparation of the microbial flocculant through aspergillus sojae, preparation of a Starkeyi lipid yeast culture solution, immobilization of Starkeyi lipid yeast through the activated carbon, and flocculation and settling of the Starkeyi lipid yeast immobilized by the activated carbon through the microbial flocculant. The immobilized Starkeyi lipid yeast is simple in operation and high in flocculation and settling rate which is maintained between 93.90% and 99.62%.

The invention discloses rural municipal sewage treatment complete set equipment which comprises a storage tank. A first partition plate is arranged on the left side of the inner side surface of the storage tank, a second partition plate is arranged on the right side of the inner side surface of the storage tank, the inside of the storage tank is divided into a settling chamber, a disinfection chamber and a storage chamber by the first partition plate and the second partition plate from left to right, a feed funnel is arranged at the upper end of the storage tank and corresponds to the settlingchamber, a storage device is arranged at the upper end of the left side surface of the storage tank, a discharge hole is formed in the left side surface of the storage tank, an electric gate valve isarranged on the left side surface of the storage tank and corresponds to the discharge hole, and a push device is arranged at the lower end of the left side surface of the first partition plate. Therural municipal sewage treatment complete set equipment has the advantages that the rural municipal sewage treatment complete set equipment is simple in structure and can move, filter, flocculating precipitation and disinfection treatment can be carried out on sewage by the rural municipal sewage treatment complete set equipment, and good treatment effects can be realized by the rural municipal sewage treatment complete set equipment; precipitates inside the storage tank can be cleaned, accordingly, the storage tank can be conveniently used for a long term, and the rural municipal sewage treatment complete set equipment is easy to operate and convenient to use.

The invention discloses a combined treatment agent for wastewater produced during oily paint spraying and a using method thereof. The combined treatment agent comprises a paint mist viscosity breaker,a coagulant aid and a coagulant, wherein the paint mist viscosity breaker is in a liquid state, the coagulant aid and the coagulant are in a solid powder state or liquid state, and a volume ratio ofthe paint mist viscosity breaker to the coagulant aid to the coagulant is (2-2.5): (1-1.5): (1-1.5). With the combined treatment agent of the invention, paint slag can be flocculated and settled at the bottom of equipment, the viscosity of the paint slag is thoroughly broken, the phenomenon of wall adhesion is avoided, and the problems that paint slag is difficult to fish out from paint spraying circulating water, treatment effect is poor, an automation degree is low, treatment cost is high and like in the prior art can be effectively solved.

The invention relates to the technical field of nitriding agents for an oxynitrocarburizing technology, and provides a nitriding agent for the oxynitrocarburizing technology and a preparation method thereof. The nitriding agent comprises the following components by mass, 5%-8% of C3N3Na3O3, 15%-25% of KCNO, 15%-28% of NaCNO, 10%-15% of Na2CO3, 10%-15% of K2CO3; 15%-18% of KCl, 1%-3% of CeCl3, 1%-3% of La2 (CO3) 3 and 3%-5% of LI2CO3. The nitriding agent overcomes the defects in the prior art, solves the problems of long reaction aging time, low finished product yield, high density and poor stability in the eutectic production of an existing nitriding agent, takes sodium cyanate, cyanate and carbonate as basic raw materials, takes chlorate rare earth and carbonate rare earth as catalysts, takes lithium carbonate as a high-temperature stabilizer, takes potassium chloride as a balancing agent, takes aluminum potassium sulfate as a corrosion inhibitor and a flocculating agent, and forms aneutectic reaction according to a fusion theory; and the eutectic problem is solved by taking cyanuric acid as a medium material in a melting process in a manner of melting an intermediate, so that the environment-friendly nitriding agent formula with stable quality and controllable nitriding speed is obtained.

The invention relates to a preparation for removing characteristic pollutants in wastewater in the electronic industry as well as a preparation method and application of the preparation, and belongs to the field of wastewater treatment. In order to efficiently remove the characteristic pollutants in the wastewater, a loaded nano zero-valent iron material is creatively added into a biochemical pooland a secondary reaction pool in the wastewater treatment process to realize the series connection of the functions of the two pools. In the application of the preparation disclosed by the inventionin a wastewater treatment method, the loaded nano zero-valent iron material is combined with microorganisms in the biochemical pool, so that the effect of degrading characteristic pollutants by the microorganisms is enhanced, the flocculation and sedimentation effects are enhanced in the secondary reaction pool, and the effective reaction time of flocculation and sedimentation is shortened to 2-3hours. The preparation and the wastewater treatment method are especially suitable for wastewater treatment in the electronic industry, the removal rate of tetrabromobisphenol A in the wastewater canreach 97%, the removal rate of bisphenol A can reach 95%, the removal rate of nonylphenol can reach 84%, the preparation and the wastewater treatment method also have a good removal effect on heavy metals, and meanwhile, the acute toxicity level of the wastewater is remarkably reduced.

The method comprises the following steps: S1, conveying ammonia-nitrogen wastewater to be treated into a magnetizing reactor, adding a phosphorus source, controlling the nitrogen-phosphorus ratio, adding a magnesium source under an alkaline condition pH value to generate a part of precipitate, and dropwise adding the magnesium source under a neutral slightly alkaline pH value until the reaction is complete; S2, adding magnetic seeds, uniformly stirring and mixing, conveying into an electric flocculation device, and carrying out electric flocculation reaction by using pulse current; S3, conveying the wastewater treated in the step S2 into a magnetic separation device, discharging a liquid phase part after magnetic separation, and collecting a solid phase part; and S4, conveying the collected solid-phase part into a magnetic recovery device, recovering the magnetic seeds, and taking the rest part as the struvite crystal precipitate. According to the scheme of the embodiment of the invention, by combining electric flocculation and magnetic flocculation, struvite crystals can keep an intact crystal form structure, and the capacity of slowly releasing nitrogen and phosphorus is high.

The invention relates to a method for treating waste water containing multiple mixed organophosphorus scale and corrosion inhibitors.Calcium hydroxide, ferrous sulfate and a flocculating agent solution are sequentially added to the waste water containing ATMP, HEDP and/or PBTCA organophosphorus scale and corrosion inhibitors, the organophosphorus removal rate effect can reach 95% or above, and the phosphorus concentration in the solution can be reduced to 0.2 mg/L or below.According to the method, the chemical reagents are directly added to remove organophosphorus ATMP, HEDP and PBCA, operation is easy and convenient, cost is low, the total phosphorus concentration of effluent can be controlled at a low level, and the effluent total phosphorus emission standard is met.

The invention discloses an electrochemical phosphorus removal device and a phosphorus removal method, and belongs to the technical field of environmental engineering sewage treatment. The electrochemical phosphorus removal device is sequentially provided with a reaction zone and an electrolysis zone, and the reaction zone comprises two stages of coagulation reaction tanks which are separated through a baffle plate; the electrolysis zone comprises an accommodating tank, a water distribution zone, a connecting electrode plate, and an induced electrode plate; and an overflow tank is arranged at the upper part of the accommodating tank. The device disclosed by the invention has the advantages that electrode plate passivation can be reduced, the sludge amount after sewage treatment is small, the equipmehnt occupied area is small, the electrode-water ratio is large, the treatment cost is low, the device can be combined with an existing phosphorus removal equipment for use, and the device isalso suitable for pretreatment of high-concentration phosphorus-containing sewage.

The invention discloses an efficient water-soluble soybean polysaccharide extraction method. The method includes: (1) homogenization; (2) fermentation; (3) concentration; (4) drying; (5) packaging. The efficient water-soluble soybean polysaccharide extraction method is simple, efficient and available for large-scale production, operation efficiency is improved by 14.3%, extraction rate reaches 37.83%, purity reaches 76.32%, and production cost is saved by 12.6%. Water is directly added for homogenization after soybeans are ground, so that soaking time is greatly saved, and production cost is saved as well. By fermentation with various lactobacilli and joint actions of various fermented products, water-soluble soybean polysaccharide precipitation is promoted, and extraction rate is increased fundamentally. Soybean fermentation liquor is only heated and boiled for concentration in a short time, so that energy saving is realized, and ethyl alcohol consumption is reduced. By low-temperature precipitation after addition of the ethyl alcohol, flocculent precipitate generation of soybean polysaccharides is promoted, and precipitation time is evidently shortened.