70 results about "Cyanobacteria bloom" patented technology

The invention discloses a method for controlling cyanobacteria bloom, which belongs to the technical field of water pollution treatment. The method for controlling the cyanobacteria bloom comprises the steps of: (1) utilizing an acquisition system with a sucking disk to perform suction acquisition on cyanobacteria on the water surface of a water body; (2) pumping cyanobacteria water which is subjected to suction acquisition into a conveying pipeline through a suction pump, and conveying the cyanobacteria water to a storage tank; (3) pumping the cyanobacteria water in the storage tank into a dosing system through a screw pump, adding a flocculating agent into the cyanobacteria water, and mixing evenly to ensure that the cyanobacteria is flocculated; (4) sending the cyanobacteria water with the flocculated cyanobacteria into a settling separation system for solid-liquid separation to obtain water and cyanobacteria mud with the water content of 80 percent, sending the water obtained after the solid-liquid separation to a clear water tank for temporary storage through the settling separation system, and then draining the water into the water body through an overflow port; and (5) separating the obtained cyanobacteria mud to obtain cyanobacteria mud with the water content less than 70 percent after the drying. The method for controlling the cyanobacteria bloom has the advantages of environmental protection, low cost and convenient operation, and can realize the safe disposal and resource utilization of the cyanobacteria bloom.

The invention discloses a cyanobacteria bloom control method based on the cultivation of floating rice. Rice sprouts at 5-trifoliate stage are fixed on a polystyrene foam board by a sponge, then the polystyrene foam board floats on a water body which needs to be controlled for cultivation, rice is duly harvested, and the polystyrene foam board is recovered. The cyanobacteria bloom control method can effectively control water bloom in lakes; and the cyanobacteria bloom control method is applied to ensure that the count of blue-green algae cells in eutrophic water bodies of the lakes is decreased to less than 1,000 ml<-1> within ten days in summer, thereby apparently improving the water quality of the eutrophic water bodies.

The invention discloses a blue algae inhibitor composition which is characterized by being prepared from the following raw materials in parts by weight: 30-35 parts of aluminum polychlorid, 18-24 parts of aluminum potassium sulfate, 13-15 parts of erythrocin, 15-18 parts of monocalcium phosphate, 14-16 parts of bacillus powder, 13-17 parts of vitamin B, 15-18 parts of calcium bicarbonate, 17-19 parts of epidesmine, 11-13 parts of lilium brownie juice, 2-4 parts of honeysuckle, 3-5 parts of radix stemonae, 1-3 parts of radix sophorae flavescentis, 3-5 parts of black nightshade and 2-5 parts of radix euphorbiae lantu. When the blue algae inhibitor composition is used in the process of preventing and treating cyanobacteria bloom in aquaculture water, no death of farmed animals due to oxygen deficit can be caused, the pollution of heavy metals can be reduced and blue algae can be effectively controlled, and the cyanobacteria bloom is unlikely to re-occur.

The invention provides a method for rapidly targeted eradication of cyanobacteria bloom in situ by algae-capturing micro-bubbles. In the method, a bubble generating solution prepared by compounding acoagulant and a surfactant for high-speed stirring generates a large number of micro-bubbles. As the surface of the micro-bubbles is positively charged, the micro-bubbles can be firmly combined with negatively charged algae cells through electrostatic force and flocculation in a short time to achieve the aim of targeted removal of cyanobacteria, algae density monitoring is carried out on a treatedbloom area for 8 to 10 days, no risk of water bloom re-eruption is found, and since the method and the device have better treatment effects on water bodies with different algae densities, the methodand the device can be used for treating the water bloom in early warning period, initial period and outbreak period.

The invention relates to a collection and treatment method of near-shore cyanobacteria bloom. The specific implementation steps include: a. a water pump continuously pumps water from the near-shore area to be cleaned where cyanobacteria are concentrated to a water seepage tank for filtering and seepage, cyanobacteria are collected in the water body into the water seepage tank to form accumulated cyanobacteria, and clean water filtered by the water seepage plate is discharged into the clean water area through a drainage pipe; b, the collected cyanobacteria are added into a screw extruder for extrusion and dehydration, and the MC-containing wastewater and the squeezed cyanobacteria are subjected separately collecting and treating; c, the collected wastewater is subjected to secondary treatment in an ultraviolet treatment box and an ozone treatment box in turn; d, the collected dehydrated cyanobacteria are put into a heating copper sleeve for heating and inactivation, so that they can bekept for a long time at 40-50 DEG C, the biological activity is basically lost. The invention can collect and salvage the coastal cyanobacteria, reduce the MC content in the water body, prevent the cyanobacteria from obtaining biological competitive advantages, and thereby prevent the occurrence and deterioration of cyanobacteria bloom.

The invention relates to a method for processing algae-enriching water. The method comprises the following steps of: a) obtaining algae liquid after thoroughly decomposing and hydrolyzing; b) carrying out anaerobic digestion on the algae liquid; c) carrying out anaerobic-aerobic processing on the algae liquid after the anaerobic digestion; and d) discharging the algae liquid subjected to the anaerobic-aerobic processing after nitrogen and phosphorus are absorbed by water plant. The invention also relates to an application system of the method for processing the algae-enriching water. According to the method and the system which are disclosed by the invention, the difficult problem of processing a large amount of cyanobacteria bloom in Lake Taihu can be effectively solved, organic pollutants and nitrogen and phosphorus nutrients in the algae-enriching water can be effectively removed, the purposes of biogas production by blue green algae organic biomass and the agriculture resource utilization of the nitrogen and the phosphorus can be realized while the lake water quality is directly improved, and the processed tail water can reach to a level A emission standard related to the national standard. Compared with the regular algae-enriching water gas floatation thickening method, the method disclosed by the invention has the advantages of having a good removing effect, being simple in operation and management and good in energy saving effect, greatly reducing the processing cost of the blue green algae, and having excellent social benefit and economic benefit.

The invention discloses a preparation method of a modified alga flocculating agent, and an application of the alga flocculating agent in treatment of cyanobacterial bloom. Iron nitrate is fixed to negative polyacrylamide through chemical complexation and physical adsorption technologies. The surface of the modified flocculating agent has many ion properties, so the improved flocculating agent can rapidly remove microcystis. The modified flocculating agent has a good adsorption effect, like high-molecular polymers are commercial products and are cheap and easily available, and the modified flocculating agent has very high stability. The modified flocculating agent also has the advantages of non-toxicity and harmlessness to environment, human and animals, no residual, substantial improvement and purification of culture water environment, effective avoiding of the bursting of the cyanobacterial bloom, and no secondary pollution.

A method for controlling cyanobacteria bloom is characterized in that the method comprises the following steps: A) collecting a water sample of the surface layer of a natural water area where cyanobacteria bloom occurs, allowing the water sample to pass through a microporous membrane, and concentrating the water sample by an ultrafiltration system to obtain a phycophage concentrate; B) preparing a mixed solution of the phycophage concentrate and a log-phase microcystic aeruginosa solution with degradable polyurethane foam as a carrier, adding the mixed solution into a container, adding the carrier simultaneously to fix the phycophage on the carrier; C) adding the carrier into the natural water area where cyanobacteria bloom occurs with an adding amount of the fixed phycophage carrier being 0.5-1 kg per one square meter water area. Compared with the prior art, the invention has the following outstanding advantages: 1) the phycophage obtained from a water area where cyanobacteria bloom occurs has good applicability and stability; 2) the phycophage fixed on the carrier has a high density of biomass and a strong capability to resist noxious material impact, and can maintain high efficiency and activity. 3) the phycophage and the carrier is environment-friendly.

The invention discloses a method for controlling cyanobacteria bloom, which belongs to the technical field of water pollution treatment. The method for controlling the cyanobacteria bloom comprises the steps of: (1) utilizing an acquisition system with a sucking disk to perform suction acquisition on cyanobacteria on the water surface of a water body; (2) pumping cyanobacteria water which is subjected to suction acquisition into a conveying pipeline through a suction pump, and conveying the cyanobacteria water to a storage tank; (3) pumping the cyanobacteria water in the storage tank into a dosing system through a screw pump, adding a flocculating agent into the cyanobacteria water, and mixing evenly to ensure that the cyanobacteria is flocculated; (4) sending the cyanobacteria water withthe flocculated cyanobacteria into a settling separation system for solid-liquid separation to obtain water and cyanobacteria mud with the water content of 80 percent, sending the water obtained after the solid-liquid separation to a clear water tank for temporary storage through the settling separation system, and then draining the water into the water body through an overflow port; and (5) separating the obtained cyanobacteria mud to obtain cyanobacteria mud with the water content less than 70 percent after the drying. The method for controlling the cyanobacteria bloom has the advantages ofenvironmental protection, low cost and convenient operation, and can realize the safe disposal and resource utilization of the cyanobacteria bloom.

The invention discloses a Stenotrophomonas sp. strain and application thereof in controlling cyanobacterial blooms. A strain of Stenotrophomonas sp. Lzh-7 (CGMCC No.6548) having significant algae-lysing activity is isolated from Taihu water body. The fact is identified that the effective algae-lysing component hydroquinone is isolated and purified from the metabolites of the strain, wherein the median lethal dose (LD50) of hydroquinone to Microcystis aeruginosa 9110 is 3.9 Mug / mL and the median lethal dose (LD50) of hydroquinone to Synechococcus BN60 is 6.7 Mug / mL. The Stenotrophomonas sp. strain can be applied to the research, development and production of novel biological algaecides and eventually applied to the control of lake cyanobacterial blooms.

The invention discloses a Stenotrophomonas sp. strain and application thereof in controlling cyanobacterial blooms. A strain of Stenotrophomonas sp. Lzh-7 (CGMCC No.6548) having significant algae-lysing activity is isolated from Taihu water body. The fact is identified that the effective algae-lysing component hydroquinone is isolated and purified from the metabolites of the strain, wherein the median lethal dose (LD50) of hydroquinone to Microcystis aeruginosa 9110 is 3.9 Mug / mL and the median lethal dose (LD50) of hydroquinone to Synechococcus BN60 is 6.7 Mug / mL. The Stenotrophomonas sp. strain can be applied to the research, development and production of novel biological algaecides and eventually applied to the control of lake cyanobacterial blooms.