31results about How to "Improve the efficiency of flocculation and sedimentation" patented technology

The invention discloses a method for preparing bacterium-algae cells through a two-wheel coculturing and flocculation method. The method comprises the steps of 1, conducting the first cycle of coculturing on rice endogenous pantoea which is added for the first time and chlorella under illumination, so that after culturing is ended, a bacterium-algae coculturing solution of the first cycle is obtained; 2, supplementing rice endogenous pantoea which is added for the second time into the bacterium-algae coculturing solution of the first cycle, conducting the second cycle of bacterium-algae coculturing under illumination, so that after culturing is ended, a bacterium-algae coculturing solution of the second cycle is obtained; 3, conducting flocculation collection treatment on the bacterium-algae coculturing solution of the second cycle, so that the bacterium-algae cells are obtained. According to the method, bacterium-algae coculturing is conducted through the rice endogenous pantoea and the chlorella, the growth rate of the algae cells is raised, biomass of the algae cells is increased, meanwhile, flocculation performance of the algae cells is improved, application of chemical flocculating agents and toxic harm to the algae cells are reduced, algae cell collection efficiency is improved, algae cell collection cost is lowered, and thereby industrial production and development and application cost of chlorella are remarkably lowered.

The invention discloses a macromolecular heavy metal flocculating device, which comprises a filter plate, a primary fixed aluminum plate, a primary heavy metal flocculating plate, a secondary fixed aluminum plate and a secondary heavy metal flocculating plate, wherein the primary fixed aluminum plate and the secondary fixed aluminum plate are I-shaped, and are butted to form a cavity; the primary heavy metal flocculating plate is arranged in the cavity; the filter plate is arranged in a groove in the upper end of the primary fixed aluminum plate; a secondary heavy metal flocculating agent is arranged in a groove in the lower end of the secondary fixed aluminum plate; the centers of the primary fixed aluminum plate and the secondary fixed aluminum plate are both provided with slant grid plates; a stainless steel filter plate is adopted by the filter plate; micro-porous heavy metal flocculating plates are adopted by the primary heavy metal flocculating plate and the secondary heavy metal flocculating plate. The macromolecular heavy metal flocculating device provided by the invention has an excellent flocculation effect, a good filtration effect and excellent stability.

The invention discloses a sewage settling tank, comprising a tank body; a mixing barrel, which has a conical tubular structure and is provided with an opening at the lower end, is arranged at the central axis position of the tank body, and a vertical water outlet pipe is arranged at the central axis position of the mixing barrel; a mixing plate is arranged at the upper end of the vertical water outlet pipe, and is fixedly connected with a center shaft; the center shaft is fixedly connected with liquid outlet pipes which are distributed along the circumference and are communicated with the center shaft. By arranging the vertical water outlet pipe and the liquid outlet pipes, which are arranged opposite to each other, as well as the mixing barrel having the conical tubular structure, the mixing plate and the rotating center shaft, swirling flow is formed under the stirring of the mixing plate during head-on collision and mixing of a precipitant and sewage, so that the efficiency of flocculating precipitation is increased, the volumes of precipitate flocculation blocks are enlarged, and the generation of subsequent precipitate is facilitated; by arranging a vertical helical blade roller and a horizontal helical blade roller which are linked with each other, the sludge can be discharged outside, and a sludge discharge pipe is prevented from being blocked.

The invention discloses an integrated environmental protection treatment system for shield slag, belongs to the technical field of shield construction, and solves the problem of unsatisfactory treatment and recovery effect of shield slag in the prior art. Screening, sand washing, swirling, sand washing again, flocculation, pressure filtration, flocculation, etc., to obtain coarse sand, fine sand, mud cake and water, meet the requirements of material reuse and outbound transportation, and realize the reduction of shield muck It has the characteristics of integrated layout, modular installation, industrial production and intelligent control; the present invention has strong adaptability, and the system has multi-level configuration, multi-level accessories and various layout forms. It can meet the requirements of different projects on processing capacity, processing capacity, site layout and geological conditions.

The invention discloses a multilayer heavy metal filter device which comprises a primary filter grid net, a secondary filter grid net, an inorganic polymer filter board located between the primary filter grid net and the secondary filter grid net, and a polymeric flocculation micro-pore plate located at the lower end of the inorganic polymer filter board, wherein the primary filter grid net is connected with the secondary filter grid net through a thread groove; and the polymeric flocculation micro-pore plate is located between the inorganic polymer filter board and the secondary filter grid net. The multilayer heavy metal filter device is good in filter effect and high in heavy metal retention rate, the flocculation efficiency is improved, and meanwhile, the flocculation effect is ensured.

The invention discloses a grille-type flocculating settling device and a construction method thereof. The grille-type flocculating settling device comprises a setting tank; a flocculating unit is arranged at the center of the settling tank; the top of the settling tank is externally connected with an overflow water collecting tank; the flocculating unit comprises a water distributing funnel, a water distributing grille and a flocculating grille; the water distributing funnel, the water distributing grille and the flocculating grille are connected in series from top to bottom. The device utilizes small-diameter grids to enhance small eddy generation so as to benefit collision flocculation of particles; meanwhile, by continuously regulating a distance between the grids, a velocity gradient of water flow is gradually reduced, so that crushing of a flocculating constituent can be effectively avoided; by adopting the device to carry out flocculating settling, the large flocculating constituent can be rapidly formed in short time and settling separation is timely carried out, so that flocculating settling efficiency is effectively improved; when the device is utilized to replace a conventional concentrator for carrying out flocculating settling of slime water, an occupied area of equipment can be reduced and investment and operation cost can be reduced.

The invention relates to an environment-friendly water treatment agent, a preparing method thereof and a water treatment method. The environment-friendly water treatment agent comprises acrylamide oligomer / oxidized graphene / ferroferric oxide compounds, zinc modified polyacrylamide, polysilicate aluminum ferrite and sodium bicarbonate. A preparing method in which oxidized graphene is grafted on acrylamide oligomers includes the three steps of carboxylation of the oxidized graphene, preparing of carboxylation ferroferric oxide and composite reacting. By means of the water treatment agent, magnetic-field-assisting rapid flocculation and efficient recycling can be achieved; meanwhile, as the zinc modified polyacrylamide is adopted, the decomposition time of the polyacrylamide is effectively shortened, and the requirement for the environment-friendly performance is met. The water treatment method includes the steps of mixing, primary flocculation, secondary flocculation and filtering. The water treatment agent is efficiently used through a lower-layer-water backflow step, and the production cost is reduced.

The invention relates to a multi-effect water treatment agent, a preparation method thereof and a water treatment method. The multi-effect water treatment agent is prepared from acrylamide oligomer grafting graphene oxide, polyacrylamide, polysilicate aluminum ferrite, poly(diallyl dimethyl ammonium chloride) and sodium bicarbonate, wherein the acrylamide oligomer grafting graphene oxide is prepared by two steps of graphene oxide carboxylation and grafting reaction. The multiple-effect water treatment agent can adapt to multiple complex water qualities, and particularly can effectively remove benzene compounds and heavy metal ions. The water treatment method comprises stages of mixing, preliminary flocculation, secondary flocculation and filtering; the efficient utilization of the water treatment agent is realized by using a lower water backflow step, and the production cost is lowered.

The invention relates to a water treatment agent for quick flocculating, and a preparation method and a water treatment method thereof. Firstly, the invention provides the water treatment agent for quick flocculating, which comprises an acrylamide oligomer / graphene oxide / ferroferric oxide compound, polyacrylamide, polysilicate aluminum ferrite, poly dimethyl diallyl ammonium chloride and sodium bicarbonate, wherein acrylamide oligomer grafted with graphene oxide is prepared by the following three steps of carboxylation of the graphene oxide, the preparation of carboxylic ferroferric oxide and composite reaction; the water treatment agent can realize quick flocculating assisted by a magnetic field, and adapts to various complex water qualities. Secondly, the invention provides the water treatment method, which comprises the following steps of mixing, preliminarily flocculating, secondarily flocculating and filtering; an underlying water refluxing step is adopted to realize the efficient utilization of the water treatment agent, so that the production cost is reduced.

The present invention provides a method for preparing high-effective algae flocculant from non-toxic, easy-to-bio-degrade, cheap, natural macromolecular polymer modified clay. Said modification can obviously raise flocculation algae-removing capability of different clay, the algae-removing rate of various clays can be 20-95% Said high-effective algae flocculant can be used for controlling and treating large area red tide, fresh water algal bloom, and also can be used for removing harmful algae in river and drinking water plant.

A method for concentrating high-concentration brine, comprising the following steps: using a circulating high-efficiency precipitation zone, a circulating ultrafiltration zone, a nanofiltration zone, and a high-salt reverse osmosis zone for treatment; it is suitable for the treatment of concentrated brine with a salt content of 1% to 5%; The treated water enters the circulating high-efficiency sedimentation zone, and is stirred and mixed evenly by the agitator in the circulating high-efficiency sedimentation zone. The temporary hardness ions are removed by adding lime. The dosage of lime is added according to the temporary hardness of the influent water to be treated; When entering the circulating ultrafiltration, the product water is filtered through the membrane pores, and the suspended solid particles remain in the reflux liquid; the nanofiltration area adopts a double-circulation operation mode, and part of the concentrated water is returned to the circulating high-efficiency precipitation area for further precipitation; part of the concentrated water is returned to the nanofiltration area. The water enters the filter area, and the water produced in the nanofiltration area enters the high-salt reverse osmosis area to be concentrated by the reverse osmosis membrane, and further desalted through the high-salt reverse osmosis.