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City tap-water highly effective low-toxin release algae-removing method

A high-efficiency, low-toxicity, tap water technology, used in chemical instruments and methods, water aeration, biological water/sewage treatment, etc. Biodegradability, elimination of post-filtration rise, and high-efficiency algae removal

Inactive Publication Date: 2008-03-05
济南市供排水监测中心
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  • Summary
  • Abstract
  • 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, implement intermittent aeration in the water body to promote local up and down circulation of the water body, destroy the bottom anaerobic zone, inhibit the release of sediment pollutants, and control algae Over-breeding; if the water depth at the intake is less than 10m, the upper intake shall be used for water intake from May to November. In the implementation of this patent, the raw material water obtained can reduce the content of algae by 20-30%.

[0016] (2) Pipeline pretreatment: Add 10-50mg / L of powdered activated carbon to the water intake, fully mix and physically adsorb through the pipeline, and the removal rate of extracellular soluble algae toxins can be 70-80%, and the algae removal range is 30%. -50%.

[0017] (3) Dissolved air flotation: The pressure of the air flotation and dissolved air t...

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PUM

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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 damaging the algae, in particular to a method for removing algae from urban tap water with high-efficiency and low-toxicity release. (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 the eutrophic water source water, the phytoplankton community is dominated by diatoms and diatoms and transformed into mainly green algae and cyanobacteria. Under suitable conditions, explosive reproduction occurs and "water blooms" occur. Studies have shown that 25%-70% of cyanobacteria blooms around the world can produce toxins. Among the 7 toxic cyanobacteria, the main toxins are Anabaena Bory, Aphanizomenon Morr. and Aphanizomenon Morr. Among cert...

Claims

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Application Information

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Patent Type & Authority Applications(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