72results about How to "Fast flocculation and sedimentation" patented technology

The invention discloses a pyridine-degrading bacterium as well as a composite bacterial agent, a preparation method and uses thereof. The newly-separated Rhodococcus pyridinovora KT-J002 CGMCC No.2789 and Cellulomonas sp KT-J007 CGMCC No.2788 not only can effectually degrade the high concentration pyridine, but also has tolerance or degradation ability for toxic substances such as benzene, phenol, dimethylbenzene, quinoline, cyanide and the like; the composite bacterial agent composed of Rhodococcus pyridinovora KT-J002 CGMCC No.2789, Cellulomonas sp KT-J007 CGMCC No.2788, Paracoccus d enitrificans W12 CGMCC No.1673, Micrococcus luteus ATCC 49442 and Arthrobacter crystallopoietes ATCC 15481 is used for environmental improvement, can effectually degrade the pyridine and is particularly suitable for the biological treatment of coking waste water.

A treating agent for the sewage generated by fabric printing and dyeing is prepared from active bentone, active palygorskite clay, aluminum polychloride and polyacrylamide through pre-treating, proportional mixing, and stirring to obtain powder.

The invention relates to an urban comprehensive sewage treatment process which comprises the following steps: the urban comprehensive sewage passes through coarse and fine grates to remove large granular solid impurities, and enters a silt settling tank to further remove silt and small granular solids; supernatant of the silt settling tank enters an 'AAO' process stage, that is, an 'anaerobic-anoxic-aerobic' reaction tank; various pollutants are removed by microbial degradation; the effect of nitrogen and phosphorus removal is realized; an anaerobic tank is subjected to sludge discharge treatment periodically; a part of mixture flowing out of an aerobic reaction tank flows back to an anoxic reaction tank; an appropriate amount of LS nano-bio-circulating water treatment agent is pumped into a water outlet pipe of the aerobic reaction tank; the wastewater enters a sedimentation tank; the sedimentation tank is provided with sludge backflow for respectively flowing back to the aerobic reaction tank and the anaerobic reaction tank; the supernatant can be discharged on standard through filtration and disinfection. The urban comprehensive sewage treatment process achieves the reduction of sludge, further purifies the water quality, and greatly increases drainage.

The present invention relates to a modified starch flucculant which has an adjustable cationic degree, has dual functions of agglomeration and flocculation and is used for fine particles, and a synthesizing method thereof. The flucculant uses corn, tuber crops and other soluble starch as backing material. Under the function of ammonium ceric nitrate/nitrate initiator, the methacrylatoethyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride and acrylamide are respectively grafted on the molecular chain of starch through aqueous solution polymerization for synthesizing a cationic degree adjustable dual-function type starch flocculant. The starch flocculant of the invention has the advantages of adjustable cationic degree, capacity for simultaneously exerting the dual functions of charge neutralization and flocculation bridging, simple technique, short reaction period, moderate synthesizing condition and high grafting efficiency. Furthermore the starch flocculant of the invention has the characteristics of high flocculating setting speed, high light transmittance of supernate, degradable capability, low price, innocuity, etc. The starch flucculant can be widely used for the waste water disposal and sludge dewatering with high fine particle content in the industries of papermaking, dyeing and printing, coal floatation, petrifaction, etc.

The invention discloses a loading flocculation pretreatment method of antibiotic fermentation wastewater and is suitable for processing mixed wastewater discharged during each antibiotic fermentation technological section. By the adoption of the loading flocculation technology, flocculation pretreatment is carried out on mixed wastewater of a crystallization solution, waste mother liquor, dona tub washing wastewater and washing wastewater for a fermentation cylinder during the antibiotic production process. A flocculating agent contains polyaluminum chloride and polyacrylamide; and the addition sequence of the flocculating agent is to add polyaluminum chloride at first and then add polyacrylamide. A loading agent contains one or two mixtures selected from active carbon, fly ash, activatedsludge and settling sludge. By the adoption of the method provided by the invention, the flocculation treatment can be effectively carried out on high-density organic wastewater generated during the antibiotic fermentation production. The method provided by the invention is simple, requires low cost and has a stable effect. By the adoption of the method, the treated wastewater can reach the requirement of subsequent biochemical treatment.

The invention discloses a polysilicate ferric aluminum chloride/fluorescent brightener composite cyanobacteria treatment agent prepared from the following raw materials in parts by weight: 24-29 parts of polysilicate ferric aluminum chloride, 17-19 parts of a fluorescent brightener, 26-30 parts of loess, 15-18 parts of fungus slime, 17-20 parts of oxalic acid, 16-18 parts of iron aluminum hydrochloride, 15-18 parts of aluminum ammonium sulfate, 14-17 parts of calcium sulfate, 1-3 parts of neroli, 2-4 parts of linalool, 3-5 parts of Asiatic pennywort herb and 3-6 parts of betel leaves. The treatment agent disclosed by the invention has the effects of rapid flocculation and sedimentation, is simple in preparation process and high in turbidity removal and phosphorous removal efficiency, and meanwhile, adopts environment-friendly raw materials, and is low in cost and free of pollution.

The invention relates to an environment-friendly flocculant with a natural high polymer as a major component and belongs to the technical field of water treatment flocculants. The flocculant is prepared from the following components in parts by weight: 60-75 parts of chitosan-lignin or chitosan-fulvic acid grafted copolymer, 15-30 parts of carboxymethyl starch, 5 parts of montmorillonite and 5 parts of activated carbon. The flocculant is mainly prepared from natural high polymers and has the characteristics of environmental protection and no secondary pollution; and besides, the flocculant is low in price, high in removal rates of heavy metal ions and organic pollutants, and high in flocculating and settling speeds.

The invention relates to a nano biological cycle water treatment agent which comprises the following raw materials in parts by mass: 10-20 parts of sepiolite fibers, 100-150 parts of pure diatom, 10-20 parts of volcanic carbon, 60-100 parts of attapulgite, 6-10 parts of zeolite, 10-20 parts of an enzymatic agent, 0.02-0.07 part of magnesium hydroxide, 0.02-0.07 part of ferric oxide, 30-50 parts of glucose, 50-80 parts of an aerobic bacterium agent, 20-30 parts of an anaerobic bacterium agent, 10-20 parts of a nitrifying bacterium agent, 10-20 parts of a denitrifying bacterium agent, 10-20 parts of a phosphorus-accumulating bacterium agent and 10-20 parts of a hydrolytic acidification bacterium agent. The preparation method comprises the following steps: sufficiently mixing various materials which are weighed according to a mass ratio, and performing packaging, thereby obtaining a finished product. The water treatment agent can be applied to treatment of various types of hardly-degradable industrial wastewater and has excellent effects of degrading and removing multiple pollutants, and the moisture content of sludge can be reduced.

The invention relates to a treatment agent for papermaking wastewater and a preparation method thereof. The treatment agent for papermaking wastewater comprises the following components in parts by weight: 10-20 parts of a flocculating agent, 3-8 parts of a surfactant, 15-25 parts of activated carbon, 7-15 parts of bentonite and 5-10 parts of a carbon nanotube/polyacrylamide composite material. Apreparation method of the carbon nanotube/polyacrylamide composite material comprises the following steps: dispersing functional carbon nanotubes in an organic solvent, adding polymerizable glycidyl ether, acrylamide and an initiator, introducing nitrogen to replace air in a bottle, carrying out a stirring reaction in an oil-bath pan at 60-70 DEG C for 2-3 h, carrying out reduced-pressure distillation to remove the solvent after the reaction ends, drying a solid in vacuum, and conducting grinding to obtain the carbon nanotube/polyacrylamide composite material. The treatment agent for papermaking wastewater is simple in treatment process, BOD and COD in water can be effectively reduced, treatment time is short, treatment effect is good, and the quality of treated water can reach a dischargestandard.

The invention specifically relates to a method for recovering a protein from heparin sodium extraction waste liquid, which comprises the following steps: adding an aluminum salt solution in heparin sodium extraction waste liquid, and stirring; after uniformly stirring, adding a flocculant solution, and stirring; when a large amount of flocculent precipitate appears, standing; drawing off the supernatant, and collecting the precipitate; and drying to obtain the protein. According to the invention, the used polyaluminum chloride product has high bridging adsorbability, and physical and chemical processes such as condensation, adsorption, precipitation and the like are accompanied in the hydrolytic process. The polyaluminum chloride structurally comprises a shape-variable multi-element carboxyl complex, has a high flocculent precipitation speed and a wide applicable pH value range, and causes no corrosion to pipeline equipment. The high molecular weight polyacrylamide forms bridges among the adsorbed particles to generate flocs, thereby being beneficial to settling of the particles; and the polyacrylamide is low in consumption, high in efficiency and easy to realize post treatment.

The invention provides a mixed type foundry waste sand wet reclamation wastewater processing method. Firstly, wastewater is demulsified, and large suspended matters in the wastewater are flocculated in a spiral flocculating tank by virtue of an inorganic flocculating agent; then small suspended matters are flocculated by virtue of an organic flocculating agent; through standing sedimentation in an inclined tube sedimentation tank, a flocculation layer forming at the bottom in a condensed manner is extracted through a sludge pump at the bottom of the sedimentation tank; the organic flocculating agent is secondarily used, and finally, a band type concentration-vacuum-filter pressing all-in-one machine is used for treatment, so that the water content of sludge discharged at an outlet of a filter cake of the band type concentration-vacuum-filter pressing all-in-one machine is less than 40%; therefore, supernate overflowing from the inclined tube sedimentation tank and clear water from a clear water outlet of the band type concentration-vacuum-filter pressing all-in-one machine can achieve the requirement for production cycle water and the standard for direct discharge.

The invention relates to a method for recovering protein from heparin sodium extracted waste liquid. The method comprises the steps that an aluminum trichloride solution is added to the heparin sodium extracted waste liquid; uniform stirring is performed; a flocculant solution is added; stirring is performed; standing is performed when substantive flocculent precipitates appear; a supernatant is removed; a precipitate is collected; and drying is performed to obtain the protein. High-molecular-weight polyacrylamide forms bridging between adsorbed particles and generates floccules, so that particle subsidence is facilitated; the dosage is small; the efficiency is high; and aftertreatment is easy.

The invention discloses a nitrogen and phosphorus removal agent for sewage and a preparation method thereof. The preparation method comprises the following steps: S1, selection of raw materials: selecting a calcium salt, an iron salt, an aluminum salt, polyaluminum ferric chloride and polyaluminum sulfate as raw materials; S2, weighing of the raw materials: selecting a ratio of the calcium salt tothe iron salt to the aluminum salt to polyaluminium ferric chloride to polyaluminum sulfate to denitrifying bacteria of 2: 2: 2: 1: 1: 1, putting the raw materials in a dry and clean container for weighing; and S3, mixing of the material: putting each of the raw materials which have been proportioned according to the above ratio into a dry and crystalline container for mixing. Compared with othertreatment processes, the preparation method of the invention has the following advantages: process is mature; the calcium, iron and aluminum salts can chemically react with phosphorus and nitrogen inthe sewage effectively, thereby forming a large amount of hydroxide floc precipitates; at the same time, polyaluminum ferric chloride and polyaluminum sulfate can accelerate the chemical reaction with nitrogen and phosphorus in the sewage, so a flocculation and sedimentation speed is fast, and the agent is non-corrosive to pipeline equipment and has obvious water purification effect.

The invention discloses a thickener capable of treating high-concentration ore pulp. The thickener comprises a reaction cavity, a mounting mechanism, a transmission mechanism and a discharging mechanism, wherein the reaction cavity comprises a peripheral cavity, a fall pressure chamber, a primary treatment chamber, a secondary treatment chamber, a primary sedimentation cavity and a secondary sedimentation cavity; when the thickener works, ore pulp materials enter the primary treatment chamber along a feed pipe, solids with larger particle sizes are deposited in the primary treatment chamber and enter the primary sedimentation cavity through a screen, the sedimentation and flocculation of the materials are accelerated by the rotation of primary inclined main boards, and sedimentation flocculates enter the secondary sedimentation cavity through a screen at the bottom of the primary sedimentation cavity; and secondary inclined main boards in the secondary sedimentation cavity drive stirring shafts, stirring frames and stirring blades to stir, so that secondary sedimentation of the materials is promoted. The thickener can treat ore pulp with the mass concentration of more than 45-55%, the treatment speed of the high-concentration ore pulp is high, the power consumption and the abrasion degree of a reaction cavity and a rake plate are low, and the service life of the thickener is prolonged.

The invention relates to a wastewater treatment system and process. The wastewater treatment system comprises an adjusting tank, physicochemical integrated treatment equipment, biochemical membrane treatment integrated treatment equipment and a clean water tank which are sequentially communicated, the physicochemical integrated treatment equipment comprises a demulsification coagulation reactiontank, a flocculation tank and an air flotation machine which are sequentially communicated, the slag discharging opening of the air flotation machine is connected with a filter press; the adjusting tank is communicated with the demulsification coagulation reaction tank; the biochemical membrane treatment integrated treatment equipment comprises a hydrolysis acidification tank, an anaerobic tank and a membrane biological reaction tank which are sequentially connected and communicated, wherein an aeration device and an MBR membrane separation and filtration system are arranged in the membrane biological reaction tank, a reflux pump is further arranged in the membrane biological reaction tank, a reflux pipe is connected to the reflux pump, and the reflux pipe is communicated with the anaerobic tank; the hydrolytic acidification tank is communicated with the water outlet of the air flotation machine, and the water outlet of the MBR membrane separation and filtration system is communicatedwith the clean water tank. The wastewater treatment system has the advantage that the hardware workpiece cleaning wastewater can be economically and efficiently purified.