798results about How to "Improve water purification effect" patented technology

The invention relates to a method for coagulating coal-bed gas produced water, which is realized in a way that: coal-bed gas produced water is coagulated by combining a chemical compounded from an inorganic coagulant and an organic flocculant with a coagulation assistant, or combining an inorganic coagulant, an organic flocculant and a coagulation assistant; a pretreatment pool is arranged at the outlet of the coal-bed gas produced water, a coagulation assistant dissolving box is arranged at the water inlet of the pretreatment pool, and the amount of the coagulation assistant is controlled by using a measuring pump or flowmeter; and the coal-bed gas produced water is firstly conditioned by the coagulation assistant, and then treated by the chemical compounded from the inorganic coagulant and the organic flocculant, or treated by combining the inorganic coagulant and organic flocculant. The amounts of the compounded or combined inorganic coagulant and organic flocculant are controlled by using the measuring pump or flowmeter, thereby effectively removing suspended matters in the coal-bed gas produced water, being beneficial to removing oil, multiple soluble ions, other organic substances and the like, reducing the consumption of chemicals and relieving the treatment load of the subsequent technique, so that the treated produced water can be discharged under the standard or can be conveniently recycled.

The invention belongs to the technical field of environmentally water treatment and particularly relates to a water purifier for treating production wastewater of a rubber accelerator NOBS and a wastewater treatment method. The water purifier comprises a flocculating water purifier, a microbial water purifier and an enzyme preparation, wherein the flocculating water purifier consists of polyaluminum ferric chloride, polyacrylamide, ferrous sulfate and aluminum sulfate; the microbial water purifier consists of nitrobacteria powder, paracoccus denitrificans powder, thiobacteria powder, aniline degradation bacteria powder, flocculating bacteria powder, bacillus siliceous powder and bacillus subtilis powder; the enzyme preparation consists of pectinase, cellulose, oxidordeuctase, xylanase, alkaline protease and monoamine oxidase. The water purifier for treating sewage provided by the invention is good in water purification effect, quick in water purification speed, high in safety and free of secondary pollution. By using a material with a desorption capacity as a raw material, sewage is treated by being assisted by microorganisms, so that the water purifier is wide in application range, and the treated water is extremely high in transparency and can be recycled.

The invention discloses an integrated rainwater system for a sponge city and a construction method of the rainwater system. The rainwater system comprises a middle green belt and water storage tanks, wherein the middle green belt comprises a vegetation planting area and a rainwater infiltration area; a concrete course is arranged at the lower end of the rainwater infiltration area; a rainwater pipe is arranged at the lower end of the concrete course, and the rainwater pipe is connected to the water storage tanks; water pumping pipes are connected from the interiors of the water storage tanks; bidirectional nozzles are arranged at the other ends of the water pumping pipes; and water pumps are connected to the water pumping pipes. In accordance with the shortcomings of the prior art and the characteristics of the sponge city, the rainwater system, which integrates water seepage, water storage, water purification and utilization, is designed, and the construction method of the rainwater system is correspondingly designed; by promoting the water seepage with the adoption of vegetation, the problem of road water-logging is solved through slow discharge and controlled release; and in addition, some impurities in the rainwater are separated on the basis of the purification capacity of the vegetation, and the rainwater is stored in the water storage tanks and is used for spraying roads and watering the vegetation in dry season, so that adverse effect caused by drought and flood seasons can be effectively relieved.

The invention discloses a water treatment process by combining an air floatation tank with a biofilter and relates to a water treatment process. The aim of the invention is to organically combine the air floatation with the biofilter to reach the comprehensive improvement of the water quality of the treated water. The process provided by the invention comprises the following steps that: (1) sewage water after pretreatment is introduced into an air flotation tank, and is subject to dephosphorization by the air flotation; simultaneously, a part of suspended substances are removed; (2) the sewage water is sent to the biofilter and subject to biological denitrification, and organisms and suspended substances of the sewage water are further removed; and (3) finally, effluent water is subject to disinfection treatment, wherein, the biofilter adopts a common biofilter, a high-load biofilter, a tower-type biofilter or an aerated biofilter. The process is suitable for a water body containing various organic pollutants, has low total energy consumption of aeration and high purification efficiency and can reach the first grade A emission standard and the aim of recycling.

The invention relates to sorption materials for removing of heavy metal ions from ground water and surface aquifer systems, and can be used by enterprises in chemical and metallurgical industry which utilize etching and galvanic technologies. The sorbent for removing of heavy metal ions from water is composed of ground zeolite and nanophase material, where the nanophase material consists of nanophase iron hydroxide and nanophase boehmite in the following ratio, mass %:Nanophase iron hydroxide12-18Nanophase boehmite 5-13Ground zeolitethe rest.Technical result is the enhanced purification effectiveness of the sorbent due to a wider range of heavy metals it can absorb when purifying highly contaminated water.

The invention discloses a method for preparing inorganic polymeric flocculant polyferric silicate sulfate and a wastewater treatment method. Ferrous sulfate is oxidized into polyferric sulfate through the acclimated thiobacillus ferrooxidans; polymerization reaction is conducted between the polyferric sulfate and the active polysilicic acid solution; and then the polymerization reaction product is left to stand and ageing to obtain the brownish red liquid polyferric silicate sulfate. The product brownish red liquid polyferric silicate sulfate is applicable to the purification of domestic sewage, printing and dyeing wastewater and heavy metal wastewater and COD removal rate, decoloring rate and heavy metal removal rate can reach more than 90%.

The invention discloses a farmland non-point pollution stepped undercurrent dam ecological purification ditch system. The system has a trapezoidal ditch section; the ditch wall and ditch bottom on two sides of the ditch are provided with seepage-proofing building blocks; hexagonal hole structures are formed in the middle of the building blocks, and plants are planted on the hexagonal hole structures; the periphery of the building blocks are laid with pebbles and fibers; undercurrent dams are arranged in the ditch body in a distance of 10-20m at an interval; an intercepting plate is arranged at a part which is 1m away from the upstream of the undercurrent dam; small holes are formed on the lower part of the intercepting plate; the upstream face of the dam body of the undercurrent dam is provided with a fine grid filtering net; the lower part of the dam body is provided with a filling layer which takes gravel and ceramsite as fillings; the filler particles are gradually thinned along the water flow direction; the upper part of the dam body is provided with a clay layer; and plants are planted on the clay layer. The problem that large land is occupied in ecological engineering is solved, the system has the characteristics of high treatment efficiency, wide application range, good visual effect and the like, the water body is subjected to full-face purification at the normal water level, and the normal drainage and flood discharge functions during large-rainfall period are not influenced.

The invention provides an ecological cycling freshwater aquaculture method. The method comprises: preparing a culture water source, supplying water to culture ponds, filtering water, and treating sewage. The plurality of culture ponds are arranged from left to right in sequence to form a culture pond group. The culture ponds in the culture pond group are connected in parallel, and form a recirculating aquaculture system with a filter tank, a treating pond, a settling pond, a biological package, an aeration tank, and a sterilization pond. Using the ecological cycling freshwater aquaculture method, water of the whole system forms virtuous cycle, and is suitable for growth of freshwater fishes and shrimps, and zero discharge of aquaculture wastewater is realized, and water resource is saved. The ecological cycling freshwater aquaculture method has obvious ecological environment benefits, and meets the sustainable development strategy of the country.

The invention belongs to the technical field of environment-friendly water treatment, particularly relates to a water purifying agent for wastewater treatment in rubber accelerator M production and further relates to a method for treating rubber accelerator M production wastewater by adopting the water purifying agent. The water purifying agent contains a flocculation water purifying agent, a microbial water purifying agent and an enzyme preparation, wherein the flocculation water purifying agent is prepared from polyaluminum chloride, polyacrylamide, ferrous sulfate and aluminum sulfate; the microbial water purifying agent is prepared from nitrobacterium powder, paracoccus denitrificans powder, thiobacterium powder, aniline degrading bacteria powder and flocculating bacteria powder; the enzyme preparation is prepared from pectinase, cellulase, oxidoreductase, lysozyme and alkaline proteinase. The water purifying agent and the method have the beneficial effects that by adopting the water purifying agent for wastewater treatment, disclosed by the invention, the water purifying effect is good, the water purifying speed is high, the safety is high, and no secondary pollution is caused; materials with adsorption capacity are used as raw materials and are assisted with microbes, so as to treat the wastewater, so that the range of use is wide, the transparency of treated water is extremely high, and recycling can be achieved.

The invention discloses a method of producing efficient composite polysilicate aluminum and ferric flocculants with fly ash and kaolin. The method is to evenly mix the fly ash, the kaolin and quick lime with water according to a certain proportion. Then, the mixture is heated for 4-8 hours under the temperature of 50-120 degree Celsius, cooled naturally and filtered. The pH value of the filtering liquid is adjusted to be 6-10 to obtain filtering liquid I. Obtained filter residues are added with industrial hydrochloric acid with the concentration of 36.7 percent, heated for 4-8 hours under the temperature of 50-120 degree Celsius, cooled naturally and filtered to obtain filtering liquid II. The filtering liquid I and the filtering liquid II are mixed according to the volume ratio of 1 to 1 and stirred. The pH value is adjusted to be 3-5. Liquid product prepared by the invention is obtained after the standing. The product colligates the advantages of aluminum salt and ferric salt flocculants. The stability and the water purifying water effect are perfect. Water which has been treated does not contain aluminum and other harmful components. The happenings of senile dementia can be effectively reduced. And with waste materials and the fly ash used as the raw materials, the method has the advantages of low production cost, high product added value good economic benefit, environmental benefit and social benefit.

The method is to do photochemical oxidizing reaction to sewage preprocessed by chemical coagulating sedimentation. Special photochemical oxidizing apparatus is used to make sewage being fully mixed with nanometre photochemical catalyst powder on condition of lighting, then producing photochemical oxidizing reaction, thus harmful substances are oxidized and reducted.

The invention belongs to the technical field of environment-friendly water treatment, particularly relates to a water purifying agent for wastewater treatment in rubber accelerator production and further relates to a method for treating rubber accelerator production wastewater by adopting the water purifying agent. The water purifying agent contains a flocculation water purifying agent, a microbial water purifying agent and an enzyme preparation, wherein the flocculation water purifying agent is prepared from polyaluminum chloride, polyacrylamide, ferrous sulfate and aluminum sulfate; the microbial water purifying agent is prepared from nitrobacterium powder, paracoccus denitrificans powder, thiobacterium powder, aniline degrading bacteria powder and bacillus larvae powder; the enzyme preparation is prepared from pectinase, cellulase, oxidoreductase, xylanase and alkaline proteinase. The water purifying agent and the method have the beneficial effects that by adopting the water purifying agent for wastewater treatment, disclosed by the invention, the water purifying effect is good, the water purifying speed is high, the safety is high, and no secondary pollution is caused; materials with adsorption capacity are used as raw materials and are assisted with microbes, so as to treat the wastewater, so that the range of use is wide, the transparency of treated water is extremely high, and recycling can be achieved.

The invention discloses an algae-controlling laterite compound flocculant as well as a preparation method and applications thereof. The method comprises the following steps: mixing 64.52-86.42% of laterite, 7.41-19.35% of polyaluminium chloride and 6.17-16.13% of ferric trichloride, and then milling to obtain the algae-controlling laterite compound flocculant. Compared with the methods by independently adding ferric trichloride or polyaluminium chloride, the algae-controlling laterite compound flocculant can obtain higher turbidity and higher chlorophyll a clearance rate, i.e. favorable effects for clearing algae and purifying water. Furthermore, with similar turbidity and chlorophyll a clearance rate, the quantities of the polyaluminium chloride and the ferric trichloride contained in thealgae-controlling laterite compound flocculant are lower than those of the polyaluminium chloride and the ferric trichloride which are independently used so as to save the cost and enhance the safetyof the flocculant in utilization. The algae-controlling laterite compound flocculant has the advantages of simple preparation procedure, moderate cost and favorable effects for clearing algae and purifying water, and is especially suitable for water bloom emergency treatment.

The invention discloses a treatment method and a device for a waste gas containing nitrogen oxides. By utilizing the properties that Fe<2+> easily reacts with NO to form relatively stable Pi-acid site complex, and the Fe<2+> is easily oxidized by NO2, the method adopts Fe<2+> solution as an absorbent, and conducts purification treatment to the nitrogen oxides by a two-step cycle method of absorption-oxygen oxidation. The nitrogen oxides in the waste gas reach emission standard after the treatment, and a coagulant ferrite or polymeric ferric salt product is obtained in the treatment process. The method can be used for the coagulation and purification treatment of water, and thus truly realizes the purpose of 'using waste for treating waste, and changing wastes into valuables'. The device comprises an absorption tower, a first circulating pump, an oxidation reaction tower and a second circulating pump which are sequentially connected in the process through pipelines to form circulation. The Fe<2+> solution in the device conducts secondary absorption treatment to the nitrogen oxides, and the Fe<2+> solution is oxidized for two times, thus ensuring good absorption effect.

The invention belongs to the technical field of environment-friendly water treatment, particularly relates to a water purifying agent for wastewater treatment of tire production enterprises and further relates to a method for treating wastewater of the tire production enterprises by adopting the water purifying agent. The water purifying agent contains an inorganic water purifying agent, a microbial water purifying agent and an enzyme preparation, wherein the inorganic water purifying agent is prepared from the ingredients in parts by weight: 5-20 parts of polyaluminum chloride, 4-16 parts of polyacrylamide, 2-15 parts of ferrous sulfate and 5-16 parts of aluminum sulfate; the microbial water purifying agent is prepared from the ingredients in parts by weight: 0.5-2.0 parts of nitrobacterium powder, 0.4-1.4 parts of paracoccus denitrificans powder, 0.2-0.8 part of thiobacterium powder and 0.3-1.2 parts of aniline degrading bacteria powder; the enzyme preparation is prepared from the ingredients in parts by weight: 0.1-1.5 parts of pectinase, 0.4-1.5 parts of cellulase, 0.1-0.8 part of dehydrogenase, 0.2-0.8 part of oxidoreductase and 0.1-0.6 part of xylanase. The water purifying agent and the method have the beneficial effects that by adopting the water purifying agent for wastewater treatment, disclosed by the invention, the water purifying effect is good, the water purifying speed is high, the safety is high, and no secondary pollution is caused; materials with adsorption capacity are used as raw materials and are assisted with microbes, so as to treat the wastewater, so that the range of use is wide, the transparency of treated water is extremely high, and recycling can be achieved.

The invention discloses a device for the bionomic control of water body algae blooms and a preparation method thereof. A plant algae inhibiting unit consists of dry plant body fragments, a waterproof small-mesh gunny bag and a waterproof nylon rope; the waterproof small-mesh gunny bag is sealed by the waterproof nylon rope and is tied on a main rope; a phycomycete biological film water purification unit consists of a porous polymer light suspended filler, a phycomycete biological film, a waterproof nylon rope and a waterproof small-sized nylon mesh bag; the waterproof small-sized nylon mesh bag is tied at the bottom of the porous polymer light suspended filler; and one end of the waterproof nylon rope is tied on the top part of the porous polymer light suspended filler, while the other end is tied on the main rope. The preparation method comprises the following steps: a, collecting integral calamus plants from field, and cleaning and naturally drying the calamus plants; b, crushing the dried calamus plants obtained in the step a into fragments, and filling the fragments into the gunny bag; c, adopting the porous polymer light suspended filler; d, clipping the filler; e, performing pretreatment on the filler; and f, combining the plant algae inhibiting unit and the phycomycete biological film water purification unit. The device has the advantages of readily available raw materials, low cost, no secondary pollution and obvious effect.

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 belongs to the technical field of light bricks and particularly relates to a light brick capable of purifying water quality. The light brick capable of purifying water quality comprises a brick casing and a brick core arranged in the brick casing, wherein the brick core is made of activated carbon, and the brick casing is made of sludge, construction waste, potassium feldspar powder, coal ash and cement. The light brick manufactured by a manufacture method thereof is light in weight, has well water quality purifying function, can maintain long-time ecological balance when applied in river barrage building and enables the water to be clear and green.

The invention discloses a combined double-vortex efficient muddy water purification device. The device comprises a vertical independent tank which is provided with a water outlet, a water inlet and a mud outlet; a water distribution unit is arranged in the tank of the purification device, and is composed of a sludge gathering area, a mixing area, a push-type reaction area, a clarification and sedimentation area and an inclined-tube sedimentation area from bottom to top; a path from the water inlet to a coarse granular sludge gathering area of the sludge gathering area is additionally provided with a hydraulic mixing desanding chamber which is internally provided with filler for mixing water with drugs; and a water inlet of the hydraulic mixing desanding chamber is equipped with a fluid distribution unit enabling fed water to rotate. The device disclosed by the invention can overcome the defects in the prior art well, save the occupied space and improve the work efficiency, and has a remarkable water purification effect.

Relating to the field of water environment ecological restoration, the invention provides a high efficiency combined restoration technology for urban and rural river polluted river water bodies. The invention comprehensively utilizes a solar energy micropore aeration technology, an ecological base, a microorganism-enzyme composite reinforcement restoration technology, an ecological floating island, aquatic animal throwing and other methods to reduce nitrogen, phosphorus and other organic matters and pollutants in water bodies, thus purifying river water bodies, optimizing the aquatic ecosystem, and simultaneously achieving a landscape optimizing effect.

This invention relates to a method for preparing water purifier of polyaluminum ferrum chloride with fly ashes derived from circulating fluidized bed as the raw material. The method comprises: dissolving fly ashes derived from circulating fluidized bed in an acid to prepare aluminum ferrum chloride solution, and adjusting the base saturability to obtain the water purifier. The water purifier can satisfy related national standards. Compared with other water purifiers, the water purifier in this invention has such advantages as simple process, low cost and good water purification ability. The method realizes recovery and recycle of solid wastes, and solves the problem of fly ashes pollution.

The invention discloses a stirring type water purification device including a device body and a foot stand arranged at the bottom end of the device body; the device body internally includes a stirring zone, a filtering zone and a precipitation zone; a part, located at the stirring zone, of the device body is provided with a water inlet; the filtering zone is internally provided with a filter; a part, located at the precipitation zone, of the device body is provided with a water outlet; the top end of the device body is provided with a motor; the motor is provided with a speed reducer; the speed reducer is connected with an adsorption bar through a rotation shaft; the bottom end of the adsorption bar is also provided with a pair of stirring blades. The stirring type water purification device has the advantages of good impurity removing effect, high water purification efficiency, convenient disassembly and cleaning, and time saving.

The invention belongs to the technical field of environment-friendly water treatment, particularly relates to a water purifying agent for treating sewage resulting from recovery of waste / used tires and further relates to a method for treating the sewage resulting from the recovery of the waste / used tires by adopting the water purifying agent. The water purifying agent contains a flocculation water purifying agent, a microbial water purifying agent and an enzyme preparation, wherein the flocculation water purifying agent is prepared from polyaluminum chloride, polyacrylamide, ferrous sulfate and aluminum sulfate; the microbial water purifying agent is prepared from nitrobacterium powder, paracoccus denitrificans powder, pseudomonas aeruginosa powder, candida lipolytica powder and bacillus megaterium powder; the enzyme preparation is prepared from pectinase, dehydrogenase, phosphodiesterase, oxidoreductase and xylanase. The water purifying agent and the method have the beneficial effects that by adopting the water purifying agent for treating sewage, disclosed by the invention, the water purifying effect is good, the water purifying speed is high, the safety is high, and no secondary pollution is caused; materials with adsorption capacity are used as raw materials and are assisted with microbes, so as to treat the sewage, so that the range of use is wide, and recycling can be achieved.

A comprehensive utilization method for coal ash solid waste comprises the following steps: grinding and sieving coal ash after being calcined, and soaking in a hydrochloric acid of 20-30% mass concentration to respectively obtain ferro-aluminium chlorination liquor and solid residue; adding Ca(OH)2 and Al(OH)3 in the ferro-aluminium chlorination liquor, and adjusting the basicity to 45-55%, controlling the pH value at 3.5-5.0 through the hydrochloric acid, performing water thermal polymerization at the temperature of 105-110 DEG C, and obtaining a poly ferro-aluminium chlorination liquor after concentration and drying; washing and drying the solid residue, adding Ca(OH)2 at the molar ratio of n(Ca)to n(Si) of 5:6, adding NaOH at the molar ratio of n[Ca(OH)2] to n(NaOH) of 1:(0.5-1.5), and performing thermal reaction at the temperature of 180-220 DEG C to obtain a tobermorite sewage disposal material. According to the method, a comprehensive solution that aluminium oxide and a small amount of ferric oxide and calcium oxide in the coal ash are adopted to prepare poly ferro-aluminium chlorination purifying agent, and the components of silicon dioxide are adopted to prepare the tobermorite sewage disposal material is offered, so that the purpose that the coal ash is comprehensively used to prepare the environment material with higher added value is achieved.

The invention relates to a combination device for the deep purification of contaminated surface water using reclaimed water and sewage as main water sources. The combination device comprises a multi-layer filter material high-efficiency biological filter reactor, a biologically-enhanced anoxic biological filter reactor, a coagulative precipitation tank, an ozone contact tank and an aerobic biologically-enhanced activated carbon filter reactor which are sequentially connected. The invention also discloses a method for purifying water by using the device, which comprises the following steps: sewage is pumped through a pipeline into the multi-layer filter material high-efficiency biological filter filled with two porous suspension type fillers to be subject to synchronous nitration and denitrification reactions; then, the sewage flows into the biologically-enhanced anoxic biological filter reactor to be subject to a biochemical reaction under the anoxic conditions; subsequently, a treating fluid is added into the coagulative precipitation tank to remove most of suspended substances and part of organic substances under the action of a coagulating agent; the supernate of the precipitation tank flows into the ozone contact tank and then flows into the aerobic biologically-enhanced activated carbon filter reactor after ozone oxidation, and pollutants are adsorbed by activated carbon and are simultaneously degraded by enhanced aerobes; and ultimately, the outlet water from the filter tank flows into a clean water tank.

The present invention is the preparation process of liquid polymerized ferric sulfate by means of oxidizing catalyst. The process includes adding ferrous sulfate, water, sulfuric acid and sodium chlorate into reactor successively and stirring for 7-10 min. The present invention features the addition of powerful catalyst potassium permanganate, high concentration of the reactant components, fast reaction speed, high iron content and basicity of the product, low oxidant and water consumption, direct drying without washing, less drying time, low drying cost and high product quality.

The invention discloses a sedimentation basin. The sedimentation basin comprises a sedimentation basin body; the interior bottom end surface of the sedimentation basin body is provided with an active carbon adsorption layer; the interior of the sedimentation basin body is divided into a sedimentation zone and a water purification zone through a separator plate; the middle-upper part of the separator plate is provided with an overflow outlet; two sides of the sedimentation basin body are respectively provided with a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is located in the sedimentation zone and the water outlet pipe is located in the water purification zone; an obliquely arranged flow deflector is installed below the water inlet pipe; and an ultraviolet sterilizer is arranged over the flow deflector. The sedimentation basin provided by the invention has good natural sedimentation effect, can exert bactericidal effect and reduce manual operation interfaces and is convenient to use.

The invention discloses application of pilea cadierei in treating livestock and poultry breeding wastewater, belonging to wastewater treatment filed. In the invention, the characteristics that of pilea cadierei has cold resistance, does not fall leaves or wither in winter and can absorb and remove ammonia nitrogen, total nitrogen and other pollutants in livestock and poultry breeding wastewater is utilized, and the pilea cadierei is directly transplanted or inserted by cuttage in the environment of livestock and poultry breeding wastewater to absorb the pollutants of accumulated wastewater so as to purify the livestock and poultry breeding wastewater. The invention solves the problem that most of plants for purifying wastewater have poor purification effects in winter currently and also provides new types of plant resources for the treatment of livestock and poultry breeding wastewater pollution, brings new improvement and development space for the treatment of livestock and poultry breeding wastewater pollution by artificial wetland plants, and achieves obvious advantages in operation cost, operation maintenance, treatment effect, as well as brought economical benefits in landscape, environmental protection and medical application, compared with traditional plants for purifying wastewater.

The invention discloses a composite artificial ecological floating island and a construction method thereof. The floating island comprises a sludge ecological floating island unit or a plurality of sludge ecological floating island units and a plurality of phycomycete biomembrane vector units. The construction method comprises the following steps: sludge powder which is subjected to innocent treatment, light materials and an inorganic adhesive are taken as raw materials to prepare the sludge ecological floating island units; porous macromolecular light suspension filler is simply processed to obtain the phycomycete biomembrane vector units; the phycomycete biomembrane vector units are pretreated and fixed on the sludge ecological floating island through flexible materials; and various floating island units are flexibly connected with each other through sponge or polystyrene foam. The composite artificial ecological floating island has raw materials available, low cost, stable chemical properties, friendly environment and no secondary pollution, reasonably utilizes waste sludge of sewage disposal plants, reduces urban sludge, and achieves the aim of reutilization of waste resources; and water purifying plants can be planted to form a miniature ecological community with microorganisms, have an all-around solid purification function on polluted water bodies, and the water purifying effect is better than that of a single floating island and phycomycete biomembrane vectors.

The invention discloses a construction method of a lake water purification system. The method includes the steps of: (a) site surveying; (b) site construction; (c) precipitation zone configuration; (d) aeration zone configuration; (e) compounding zone configuration; (f) ecological planting zone configuration; (g) floating island unit establishing; and (h) regional beautification. The method provided by the invention has the advantages of simple construction, short construction period and cost saving, and after construction, the purification system has the functions of water storage, flood control, and water and air purification, can protect biodiversity, adjust microclimate and improve environmental quality, thus laying the foundation for water quality improvement of regional lake water.