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Highly effective low-toxin release algae-removing method for city tap-water

A high-efficiency, low-toxicity, tap water technology, applied in chemical instruments and methods, water aeration, biological water/sewage treatment, etc., can solve problems such as improper use of purification treatment processes, reduce drinking water quality, affect water supply safety, etc., and achieve improvement Biodegradability, elimination of post-filtration elevation, and high-efficiency algae removal

Inactive Publication Date: 2009-10-21
济南市供排水监测中心
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 2) Improper use of purification process in waterworks will lead to destruction of algae, release of intracellular microcystins, reduce drinking water quality, and affect water supply safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] This specific embodiment adopts the following steps:

[0015] (1) Safe water intake: In the hot stratification season, if the water depth at the water intake exceeds 10m, intermittent aeration in the water body will be implemented to promote local up-and-down circulation of the water body, destroy the anaerobic zone at the bottom, inhibit the release of sediment pollutants, and control algae Over-breeding; if the water depth at the water intake is less than 10m, use the upper water intake to draw water during May-November. By implementing this patent, the obtained raw material water can reduce the content of algae by 20-30%.

[0016] (2) Pipeline pretreatment: Dosing 10-50mg / L powdered activated carbon at the water intake, fully mixing and physical adsorption through the pipeline, the removal rate of extracellular soluble algal toxins can be 70-80%, and the removal range of algae is 30 -50%.

[0017] (3) Dissolved air flotation: The pressure of the air flotation disso...

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Abstract

The high efficiency and low toxicity algae eliminating process for city tap water includes the following steps: safe water catchment, pre-treatment of pipeline, air dissolving and air floating, intensified flocculating, intensified filtering and safe sterilizing. By means of obtaining material water with minimized algae content and taking high efficiency algae eliminating measures, the present invention can minimize the effect of algae pollution on the quality of tap water.

Description

(1) Technical field [0001] The invention relates to a method for removing algae without destroying algae, in particular to a method for removing algae with high efficiency and low toxicity in urban tap water. (2) Background technology [0002] 1) Due to poor treatment of municipal sewage and industrial wastewater, a large amount of nutrients such as nitrogen and phosphorus and organic pollutants are discharged into drinking water sources such as rivers, lakes or reservoirs, resulting in eutrophication of water bodies. In eutrophic water source water, the phytoplankton community mainly changes from dinoflagellates and diatoms to green algae and cyanobacteria, and forms explosive reproduction under suitable conditions, resulting in "bloom". Studies have shown that 25%-70% of cyanobacteria blooms around the world can produce toxins. Among the seven toxic genera of cyanobacteria, the main ones that produce toxins are Anabaena Bory, Aphanizomenon Morr. And certain strains in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/28C02F7/00C02F1/24C02F1/52C02F3/10C02F1/50
CPCY02W10/10
Inventor 贾瑞宝孙韶华陈家全周维芳
Owner 济南市供排水监测中心