150results about How to "Improve sewage treatment capacity" patented technology

The invention discloses an aquaculture sewage treatment method, which specifically comprises the following steps of: firstly, feeding an microbial agent into sewage discharged from a culture pool, then introducing the sewage into a flocculation basin, and continuously feeding flocculants under the condition of continuous air aeration, wherein the hydraulic retention time is 15-30 minutes; and introducing the sewage subjected to air aeration and flocculation treatment into a membrane device under the action of a constant-flow pump to complete filter treatment, directly discharging permeated clear water or returning the permeated clear water to the culture pool for reutilization, and returning concentrated sewage to the flocculation basin for continuous treatment or directly discharging partial of the concentrated sewage. According to the aquaculture sewage treatment method, a biological treatment technology, a flocculation technology and a modern membrane filtration technology are organically combined, so that water quality is guaranteed, the production efficiency is increased, the production cost is greatly reduced, the advantages of simple process, stable system, small occupancy, low operation cost and the like are achieved, and bacteria and suspended matters in the sewage can be removed, and the purpose of safety recycling is achieved.

The invention primarily discloses an integrated sewage treatment system. The technical scheme of the system is as follows: the integrated sewage treatment system comprises a filtering region, a settling region and a disinfecting region. A squeeze filtration device and a vibrating filtering device are arranged in the filtering region; the vibrating filtering device is located below the squeeze filtration device; the settling region is connected to the filtering region through a first flow guide tube; a feeding device, a stirring device and a rotary filtering device are arranged in the settling region; the feeding device is connected to the stirring device; the rotary filtering device comprises a filtering barrel, a reaction barrel and a rotating motor; the reaction barrel is connected into the filtering barrel through an air cylinder; the rotary shaft of the rotating motor is connected to the bottom of the filtering barrel; the disinfecting region is connected to the settling region through a second flow guide tube; a water spray nozzle is formed in the top of the second flow guide tube; and a baffle plate and an ultraviolet lamp are also arranged in the disinfecting region. The system disclosed by the invention purifies sewage by way of squeeze filtration, vibrating filtration, flocculent precipitation and disinfection, so that purposes of simplifying the process, reducing the investment, enhancing the treatment efficiency, lowering the treatment cost and reducing the occupied area are achieved.

The production process of compound water-cleaning agent aluminium iron polysulfate uses the iron oxide contained offscum produced after production of sulfuric acid in sulfuric acid plant as raw material, and adopting the folloiwng steps: according to the chemometric, adding water, offscum and sulfuric acid into reactor in turn to make reaction, then adding isometric water to make dilution, and discharging diluted reactant into settling tank, adding small quantity of flocculant to make natural settling and solid-liquid separation, pumping said clear liquor into polymerization container, addingH2O2 and making it and the clear liquor to implement quick oxidation and polymerization to obtain the invention finished product liquor, evaporating and dewatering to obtain its natural crystal, thenbreaking it into granular or powdered material to obtain the invented solid aluminium iron polysulfate. It can obtain good sewage treatment effect.

The invention belongs to the technical field of drinking water and sewage treatment, and specifically relates to a water treatment method and equipment of a photocatalytic composite membrane bioreactor for removing micro pollutants out of water. The process mainly consists of an aeration tank and other auxiliary devices. Sewage containing micro pollutants enters the aeration tank. An ultraviolet lamp tube loaded with a titanium dioxide catalyst is vertically distributed at the center in the tank, and the outer layer of the lamp tube is encircled by a membrane assembly and a biological membrane carrier mainly loaded with nitrifying bacteria in sequence. One part of micro pollutants in the sewage are removed by virtue of ultraviolet photo-catalysis, the biological membrane and ammonia nitrogen-containing wastewater generate nitration reaction to remove ammoniacal nitrogen, and in the nitration process, the biological membrane generates co-metabolism with the micro pollutants to further remove the pollutants. The process can have stable and efficient removing effect on various micro pollutants under a low-concentration organic carbon source condition.

The invention relates to a method for the production of a calcium type polyaluminium chloride water purifying agent, which is mainly characterized in that: a kaolin is firstly activated through methods of mechanical grinding and roasting so as to make a clinker, an aluminum in the clinker is soaked out by adopting the new dissolving method of , thereby obtaining the semi-finished digestion liquor and the filter residue with rather high basicity, and the basicity of the digestion liquor is adjusted by adopting a calcium compound as a regulator to prepare the calcium type polyaluminium chloride water purifying agent. Using the water purifying agent to treat the waste water has the advantage of short flocculation response time (30s), and the sedimentation time is only 20min.

The invention discloses a sewage treatment device, comprising a fan, a water pump and a tank body. The upper part of the tank body is provided with a sewage inlet and an exhaust port; a Z shape separator is fixed inside the tank below the sewage inlet; the Z shape separator comprises an upper baffle plate, a vertical baffle plate, a lower baffle plate, and divides the tank body into four regions; the upper baffle plate is provided with a plurality of reflux holes, the reflux holes are equipped with anti-reflux nozzles for preventing the water above the upper baffle plate from flowing to the lower position; a membrane module is fixed below the upper baffle plate, and a hanging membrane packing assembly is fixed above the lower baffle plate; a left aeration device is fixed below the membrane assembly, and is connected with a fan outside the tank body through a gas supply pipeline; a water inlet of the water pump outside the tank body is connected with a membrane assembly water outlet duct through a water pipes; and the gas supply pipeline and the water pipe are equipped with installation valves. The device integrates two sewage treatment technology and equipment of biological membrane method and a membrane bioreactor, and has the advantages of small land occupation, and low investment and operating cost.

The invention relates to a method for preparing natural mineral modified bentonite flocculating agent. A method for preparing the modified bentonite flocculating agent is characterized by comprising the following steps: firstly, preparing ferrous sulfate solution, secondly, preparing sodium bentonite suspension, thirdly, weighing ferrous sulfate solution and sodium bentonite suspension according to mass ratio between ferrous sulfate and sodium bentonite=1:0.08-1:140, dropping the ferrous sulfate solution into the sodium bentonite suspension, obtaining the solution, fourthly, filtering solution, removing filtrate, collecting solid materials in the solution, drying the solid materials under 50 to 400DEG C, disintegrating, obtaining disintegrated solid, fifthly, placing disintegrated solid into a micro-wave oven, radiating with micro wave for 0.5 to 60min under the power of 100 to 800W, and preparing the modified bentonite flocculating agent. The modified bentonite flocculating agent of the invention has high removal rate to suspended substances and total phosphorus in polluted water, and the removal rate reaches higher than 80%. The preparation technique of the invention is simple.

The invention discloses a method for improving ammonia nitrogen removal in a constructed wetland by utilizing a wetland harvesting plant. The constructed wetland comprises a pool body, a water inlet / outlet system, a wetland matrix and a wetland plant; the wetland plant is harvested and then carbonized to obtain a biomass carbon material of such a wetland plant, and then the biomass carbon material is backfilled into the pool body as the wetland matrix; the wetland matrix comprises a bottom layer, an intermediate layer and a surface layer which are placed from bottom to top in sequence; and the intermediate layer is the biomass carbon material. By adopting the method, the effect of removing NH4<+>-H in sewage is improved, no secondary pollution is brought, and the cost on construction and operation of the conventional constructed wetland can be effectively reduced; and the method has the characteristics of being stabile in water treatment effect and capable of buffering the impact to hydraulic power and pollution load. The method not only solves the problem that improper treatment is performed to the harvested wetland plant and causes secondary pollution to the environment, but also effectively improves the removal effect of the wetland to the NH4<+>-H, and realizes the recycle of the wetland plant.

The invention relates to a fly ash composite flocculating agent and a preparation method thereof. Fly ash composite flocculating agent is a compound product of organic flocculating agent and modified fly ash. A preparation method of the fly ash composite flocculating agent is as below: fly ash is treated with acidity modification in a supersonic wave environment to enhance absorption capability of fly ash; then the fly ash is compound with organic polymeric flocculating agent to form a novel flocculating agent with efficient flocculation effect and high adsorption. The composite flocculating agent of the invention has good compressive treatment effect on sewage in industries of printing and dyeing, papermaking, petroleum, chemistry and light industry, especially on sewage with high chromaand high COD (chemical oxygen demand).

The invention discloses an aeration system which comprises gas sources, a gas feed control device, a power water pump, an ejector and a synergistic nozzle; the gas sources comprise an air source and an oxygen source, the gas feed control device controls selection of a gas source and the quantity of gas flow, and the power water pump allows water pumped from an aeration tank to form pressure fluid and supplies the pressure fluid to the ejector; the synergistic nozzle is connected with an output terminal of the ejector through a pipeline and sprays water-vapor mixed liquor output by the output terminal of the ejector below the water surface of the aeration tank. According to the invention, the aeration system uses the gas feed control device to control selection of a gas source and the quantity of gas flow according to load of water treatment, which enables the aeration system to have the three functions of pure oxygen aeration, oxygen-rich aeration and air aeration; therefore, air aeration can be used under the condition of a normal water volume, pure oxygen or oxygen-rich aeration can be used under the conditions that load greatly fluctuates and sewage treatment scale needs to be greatly improved, and on the premise that no reconstruction or enlargement is needed, sewage treatment capability is enhanced and sewage treatment cost per unit is reduced.

The invention provides an air cathode, a preparation method, a sewage treatment system, and the application of a carbon-based material in preparation of a catalyst. The air cathode comprises a diffusion layer, a catalyst layer and a collector layer, wherein the catalyst layer contains the catalyst; the catalyst layer is arranged on one side of the diffusion layer; the collector layer and the catalyst layer are arranged on the same side of the diffusion layer. The air cathode is simple in structure and can be prepared without complicated operation; the air cathode can realize preparation of hydrogen peroxide through cathode reduction reaction under a relatively low potential.

This invention belongs to the field of sewage disposal and resource utilization. Against the disadvantages such as high investment, maintenance and running cost existing in the traditional aeration biofilter sewage disposal; this invention describes a sewage recovery and recycles device and its operation method. The device is composed of a pretreatment zone, an anaerobic zone, an aerobic zone and a electrochemical sterilization device. After treatment, the sewage can satisfy the recycle standard. The device has such advantages as low investment, high adaptability and good treating effect.

The invention belongs to the technical field of water treatment, and particularly relates to a compound ecologic water treatment system operating in a low-temperature season. The compound ecologic water treatment system adopts a vertical undercurrent water distribution manner and a two-level series structure; each level is divided into three layers; each first layer is a 5-50 cm heat-insulating soil layer, and overyear plants are planted on the soil layer; each second layer is a 10-30 cm earthworm acting area filled with a filling material; each third layer is a 30-80 cm microbe filling material layer, and cryophile is adsorbed onto each filling material. In the compound ecologic water treatment system, the microbe amount and activity can be remarkably improved, and the wastewater treatment performance in low-temperature season is stable and favorable; besides, the compound ecologic water treatment system has the advantages of being low in constructing and running cost, simple and convenient to maintain and operate, high in recycling degree, simple in technological process, low in secondary pollution, and good in landscape greening effect.

The invention discloses an enzyme preparation for treating industrial sewage. The enzyme preparation comprises compound enzymes, a carrier, organic acid, polyethylenimine, inorganic salt, yeast extract and water, wherein the compound enzymes comprise protease, cellulase, oxido-reductase, pectinase, dehydrogenase and lysozyme. After the enzyme preparation is used, the average removal rate of COD (chemical oxygen demand) is 1.46 times that before the use of the enzyme preparation, the average ammonia nitrogen removal rate after the use of the enzyme preparation is 1.48 times that before the use of the enzyme preparation, sludge residues are about 0.56 time that of a conventional sewage treatment system, and high sludge sedimentation performance is ensured.

A device for integrating extrusion and dehydration relates to the technical field of urban sewage treatment, and mainly comprises a reactor part, an extrusion and dehydration part and an outer housing part; a reactor inlet is formed in the lower part of a reactor, and a reactor outlet is formed in the upper part of the reactor; the reactor outlet is communicated with a filtering frame space in an outer housing through a pipeline from the end part of the outer housing; the reactor is provided with a flocculating agent feeding port; a screw shaft penetrates through two ends parts of the outer housing; one end part of the screw shaft is connected with a screw shaft speed reducer motor; the screw shaft is integrally sleeved with a cone; a helical blade is arranged outside the cone, and is a variable-pitch helical blade of which the screw pitch becomes smaller gradually; a hairbrush is arranged on the edge of the helical blade; a filtering frame surrounds the helical blade; a spray system driven by a flusher motor is arranged on the outer side of the filtering frame; the outer housing is inclined; a discharging port is formed in the end part of a front supporting leg of the outer housing; and a filtrate outlet is formed in the lower side of the end part of a rear supporting leg of the outer housing.

The invention discloses a phosphorus removal agent for municipal domestic sewage. The phosphorus removal agent comprises, by weight, 20-70% of polyaluminium sulfate, 20-70% of polyferric sulfate, 0.1-5% of calcium sulfate and 0.1-5% of magnesium oxide. The phosphorus removal agent has the advantages that the efficient phosphorus removal agent for the municipal domestic sewage is prepared from safe and non-toxic raw materials, is environmentally friendly, is non-toxic and is free of chlorine ions or secondary pollution; the phosphorus removal agent is excellent in cost performance; the various raw materials are easily available, production procedures are simple, and waste such as wastewater, waste gas and waste solids can be prevented; the phosphorus removal agent for the sewage is wide in pH (potential of hydrogen) application range and can be used for the sewage with pH values in the ranges of 3-11; the phosphorus removal agent has diversified functions such as phosphorus, ammonia nitrogen, COD (chemical oxygen demand), SS (suspended substances) and heavy metal removal functions and flocculation functions; the phosphorus removal agent is applicable to treating the municipal domestic sewage with the original water total phosphorus concentration of 1-5 mg / L; obvious effects of treating the sewage can be realized, and the total phosphorus concentration can be reduced and is lower than 0.4 mg / L by the aid of 10-200 ppm of phosphorus removal agent; the phosphorus removal treatment cost for the municipal domestic sewage is only 0.05-0.08 yuan / ton, and accordingly the sewage treatment cost can be effectively reduced.

The invention relates to the technical field of waste water treatment, particularly to an anaerobic biochemical reactor. The anaerobic biochemical reactor comprises divided chambers, a precipitation area, gas discharge pipes and sludge discharge pipes. A pool body is divided into the divided chambers A, B and C and a water discharge chamber Y by baffle plates, wherein the divided chambers A, B andC are connected with each other in series; the divided chambers A, B and C are divided into downward flow channels and upward flow channels by baffle plates; the lower parts inside the divided chambers are respectively provided with water distribution systems; one side of the pool body is provided with a water inlet pipe; the tops of the divided chambers are respectively provided with the gas discharge pipes; and the bottoms of the divided chambers are respectively provided with the sludge discharge pipes. The anaerobic biochemical reactor is a multi-stage reactor with a specific reaction phase in each stage and has the advantages of high reaction efficiency, strong applicability, reduced height of the reactor in horizontal series connection, low water level, high water power, less loss,improved capacity utilization rate in siamesed series connection, reduced land occupation, obvious effect on waste water treatment and considerable market application prospect. In addition, because the divided chambers are in a series connection structure, the impact resistance capability can be improved, and the reaction control time can be provided.

The present invention discloses a kind of artificial arched canopy wet land and its application in sewage treatment process. It includes an artificial wet land system and an arched canopy skeleton placed on the artificial wet land system, on its lower layer at least one layer of fogging-resistance film is fixed, and the upper layer of said arched canopy skeleton is a formed from water-proofing paper cover.

The invention discloses a biodisc reactor disc and preparing method, which comprises the following steps: making the disc as three-layer structure; making middle layer as basal body (8) constructed by circular polypropylene disc; selective solidifying a activated char layer on the two sides of basal body (8); mixing bisphenol A epoxide resin and ethanediamine agent; finishing hardener; preconditioning activated char particle with chemical oxidation-iron ion covering technology; solidifying activated char particle on the tow sides of polypropylene disc with hardener. This invention possesses merits of big surface area, hard, light, non-deform and good capacity of biological adsorption.

The invention discloses a disposing method of heavy metal acid-refined effluent or acid effluent, which is characterized by the following: adding coagulant in the effluent pipe or outlet through drug spraying pipe; connecting at least one auxiliary pipe on the drug spraying pipe; adding composite element in the coagulant through auxiliary pipe to improve coagulant efficiency; adopting magnesium hydroxide, calcium hydroxide, potassium hydroxide, sodium hydroxide or aluminium hydroxide as coagulant; making composite element from diatomaceous earth, alta-mud, zeolite, cationic polyacrylamide, diallyl dimethyl ammonium chloride or acrylamide copolymer.

The invention discloses a method for treating sewage by combining electric flocculation and chemical flocculation. The method comprises the steps that the pH value of the sewage is adjusted to be 6-8,1.5-4.2 g of a chemical flocculant is added into per liter of sewage, and treatment is carried out for 3-8 minutes; and the sewage subjected to chemical flocculation is added into an electrolytic cell, a positive plate and a negative plate are arranged in the electrolytic cell, the positive plate is connected with a positive pole of a voltage-stabilized direct-current power supply, the negative plate is connected with a negative pole of the voltage-stabilized direct-current power supply, the voltage-stabilized direct-current power supply is connected, and after the electrolytic cell is electrified for 40 minutes, conventional mechanical filtration is adopted to filter floccules and slurry so as to obtain purified water. Compared with the prior art, the method has the advantages that an electric flocculation technology and a chemical flocculation technology are combined, the sewage treatment effect is good compared with the sewage treatment effect through single electric flocculation and chemical flocculation, the treated purified water is good in water quality and is colorless and odorless, and the COD (chemical oxygen demand) can reach 600 mg / L or below.

The invention discloses an industrial wastewater high-efficiency treating agent and a preparation method thereof. The industrial wastewater high-efficiency treating agent is prepared from 28 parts of activated sludge, 20 parts of activated carbon, 22 parts of polyaluminum chloride, 11 parts of aluminum sulfate, 6 parts of cationic polyacrylamide, 7 parts of ferric sulfate chloride, 16 parts of pectinase, 5 parts of copper sulfate chloride, 13 parts of oxalic acid, 5 parts of polyaluminum silicate sulfate, 7 parts of citric acid, 1 part of ethylenediaminetetramethylene phosphonic acid, 6 parts of tetrabutylammonium bromide, 2 parts of ethylene glycol monobutyl ether, 4 parts of calcium fluoride, 1 part of ammonium molybdate, 10-16 parts of ethanediol, 11-13 parts of quaternary ammonium salt lignin flocculant, 6-8 parts of butyltetra titanate, 3-5 parts of nonylphenol polyethenoxy ether, 25-45 parts of microbial solution and the like. The industrial wastewater high-efficiency treating agent has the characteristics of reasonable formula, simple preparation method, accessible raw materials, low cost and high purification speed, greatly enhances the industrial wastewater treatment effect, and has dvantages of no toxicity, no harm and favorable sewage treatment effect.

The invention discloses a preparation method of an oil recovery plant sewage biofermentation treating agent. The oil recovery plant sewage biofermentation treating agent is prepared from Flavobacterium, wood charcoal, humic acid, a biological growth irritant, a biological nutrient, a coagulant aid, a demulsifier, a bactericide, a deoxidizer, an enzyme, a flotation agent and a corrosion and scale inhibitor. The preparation method of the oil recovery plant sewage biofermentation treating agent comprises the following steps: humic acid preparation, culture fluid preparation, pH value regulation, mixing and the like. The oil recovery plant sewage biofermentation treating agent has the advantages of no toxicity, high safety, environment friendliness and the like, and does not influence the human health. When the oil recovery plant sewage biofermentation treating agent is used for treating sewage, the SS (suspended sediment) removal rate is up to 99.14-99.29%, the COD (chemical oxygen demand) removal rate is up to 99.03-99.12%, and the oil removal rate is up to 99.06-99.15%.

The invention discloses a novel process for cleaning a filter material in a biological filter. The novel process comprises the process steps of adding a surfactant sodium alcohol ether sulphate and a reagent oxalic acid, accounting for 8-12% of the volume of the water in the biological filter, into the biological filter, cleaning the filter material in the biological filter, introducing air to perform aeration, stirring for 20-40 minutes, stopping introducing air, and then soaking for 18-30 minutes; performing high-airflow backwashing aeration for 1-3 hours, stopping aeration, standing for 20-40 minutes, quickly performing pollution discharge for 3-5 minutes, performing air-water joint backwashing for 1-3 hours, stopping air washing, and performing clear water backwashing for 20-40 minutes; discharging all the sewage in the biological filter, inputting water into the biological filter again to perform air-water joint backwashing for 1-3 hours, and performing clear water backwashing for 20-40 minutes until the content of the surfactant sodium alcohol ether sulphate in the water is lower than 5mg / l. According to the process disclosed by the invention, the sewage treatment capacity can be effectively strengthened, and the activity of biological bacteria is enhanced.

The invention relates to the field of sewage treatment, and relates to a sewage dosing treatment device. The sewage dosing treatment device comprises a treatment machine body, wherein a sewage treatment cavity, an aeration driving cavity and a chemical cavity are respectively formed in the treatment machine body from top to bottom; an elastic telescopic cover is mounted in the sewage treatment cavity; the lower end of the elastic telescopic cover is connected with a sewage filter screen; a rotating pipe is mounted at the lower part of the sewage treatment cavity; a driving mechanism for driving the rotating pipe to rotate is mounted in the aeration driving cavity; a stirring aeration pipe is installed at the upper end of the rotating pipe, an air pump used for blowing compressed air into the aeration driving cavity is installed on the side wall of the treatment machine body, a chemical pump is further installed in the chemical cavity, a chemical lifting pipe is installed on an outlet of the chemical pump, and the upper end of the chemical lifting pipe is located in the middle of the lower side of the sewage filter screen. The sewage dosing treatment device is good in sewage filtering effect, sufficient mixing of chemicals and sewage is facilitated, the application effect of the chemicals is good, and the sewage treatment efficiency and effect are improved.

The invention discloses a special integrated sewage treatment system for plateau and alpine regions. The special integrated sewage treatment system comprises a biochemical bin, a precipitation bin and a clear water bin which are communicated sequentially, wherein a heating coil and an aerator are arranged in the biochemical bin, the heating coil is sequentially connected with a hot water circulating pump and a thermal insulation water tank, the aerator is connected with fans, the fans, the hot water circulating pump and the thermal insulation water tank are all located in a thermal insulation fan room, and a solar heat collecting device is arranged on the thermal insulation fan room. A method for sewage treatment by using the special integrated sewage treatment system for plateau and alpine regions comprises steps as follows: S1, sewage enters the biochemical bin from a water inlet of the biochemical bin and is heated; S2, the heated sewage is precipitated in the precipitation bin, and clear water is obtained; S3, the clear water flows into the clear water bin and then is discharged. The special integrated sewage treatment system for plateau and alpine regions can operate at the low temperature in winter in the plateau and alpine regions. By means of the method for sewage treatment by using the special integrated sewage treatment system for plateau and alpine regions, the sewage treatment capability is effectively improved.

The invention discloses a flocculating agent for chemical wastewater and a preparation method thereof. The flocculating agent for chemical wastewater comprises the following raw materials in parts by weight: 20-30 parts of nonionic monomer, 3-5 parts of anionic monomer, 10-20 parts of cationic monomer, 2-4 parts of dimethylaminoethyl methacrylate, 0.05-0.09 part of initiator, 0.3-0.5 part of ammonium persulfate, 120-140 parts of deionized water and 20-40 parts of fly ash, wherein the nonionic monomer includes acrylamide, methacrylamide and nitrogen substitute thereof. The flocculating agent disclosed by the invention has the advantages of higher density of charged groups, stronger adsorbing and capturing abilities against suspended particles, high-temperature resistance, high-salt resistance and acid-base resistance; compared with other flocculating agents, the flocculating agent has the characteristics of high broad-spectrum property, good stability and good flocculating effect; and in sewage treatment, the flocculating agent has better decolorizing effect and DOD removal effect and realizes comprehensive control of sewage, the chemical treatment effect on sewage is enhanced, and the waste fly ash is turned into wealth while comprehensive utilization is realized.

The invention relates to the field of sewage treatment, and particularly relates to a composite type magnetic microalgae biological adsorbent and a method thereof for adsorbing cadmium in wastewater.A preparation method of the composite type magnetic microalgae biological adsorbent comprises the following steps: (S.1) microalgae culture: culturing microalgae in a culture medium to obtain microalgae culture liquid; (S.2) preparation of magnetic Fe3O4 nano particles: preparing an acid iron salt solution from trivalent iron salt, bivalent iron salt and hydrochloric acid, and performing precipitation separation and cleaning to obtain magnetic Fe3O4 nano particles; (S.3) compounding: adding the magnetic Fe3O4 nano particles into the microalgae culture liquid, and performing shake culture to obtain magnetic microalgae. The invention overcomes the problems of the prior art that the microalgae is easily lost from a reactor, the difficulty in separating microalgae and wastewater is great, thecost is high and the microalgae activity is low, and has the following advantages: (1) the composite type microalgae biological adsorbent can be effectively recycled to prevent loss; (2) the separation is convenient while the separation cost is low; (3) the activity and the overall treatment efficiency are high.