Cyanobacterial bloom control method applicable to urban scenic water lake

Abstract

The invention relates to a cyanobacterial bloom control method applicable to an urban scenic water lake. The method comprises the following steps of uniformly mixing 350 to 400 meshes of diatomite andpolyferric chloride; then, laying the materials between two pieces of quadrangular nonwoven fabric; sewing the double-layer nonwoven fabric subjected to material laying by a sewing machine; sewing the fabric together with a nylon screen window net along four edges of a flocculating agent belt; then, connecting floating balls along the edges of flocculating screen belt according to the principle of connecting one floating ball every an interval of 1m; laying a prepared flocculating screen belt provided with the floating balls onto the water surface of the lake, wherein for the lake with slight, medium and heavy outburst cyanobacterial bloom, the placing time of the flocculating screen belt in the water is respectively 24 hours, 48 hours and 72 hours; drawing the screen. The cyanobacterialbloom can be effectively controlled through flocculation; meanwhile, the cyanobacterial and the flocculating agents can be thoroughly separated out from the water body through drawing the screen of aflocculating agent belt screen, so that the control method of the lake cyanobacterial bloom causing secondary pollution is avoided.

Description

technical field [0001] The invention relates to a treatment method for cyanobacteria blooms in eutrophic water bodies, in particular to a treatment method suitable for urban landscape water—lake cyanobacteria blooms. By using the technology of the invention, blue-green algae can be effectively removed and secondary pollution can be avoided, and a new technology is provided for urban landscape water—lake blue-green algae bloom control. Background technique [0002] Landscape water in urban parks - lakes are caused by the poor water quality of the supply water source, the discharge of domestic sewage and the impact of human activities, coupled with slow water flow, simple ecosystem and poor self-purification ability, resulting in eutrophication of most urban landscape water Increasingly serious, frequent outbreaks of algae blooms. The cyanobacteria in bloom will consume the dissolved oxygen in the water, cause the death of aquatic animals and plants, and eventually lead to th...

AI Technical Summary

Problems solved by technology

However, when it is applied to the control of cyanobacteria in lakes, the flocculation and sedimentation method only transfers the bloom algae from the water phase to the sediment, and the algae cells are not completely eradicated. In addition, the excessive addition of coagulant leads to a certain substance in drinking water exceeding the standard. At present, many water plants add a large amount of aluminum salt coagulant, which leads to a large increase in the concentration of residual aluminum ions in the water. The "Drinking Water Hygienic Standard" (GB5749-2006) issued by the Ministry of Health in 2006 clearly stipulates that the aluminum content in drinking water shall not exceed 0.2mg / L

The existence of a large amount of residual aluminum ions in water will cause great harm to human health, and if a large amount of aluminum salt coagulant is added to the lake, the concentration of residual aluminum ions in the water will increase significantly, which will have potential harm to groundwater