Method for removing cyclop type zooplanktons during treatment of drinking water

Abstract

The invention provides a method for removing cyclop type zooplanktons during the treatment of drinking water. The method comprises a step of precipitating water source water by using a precipitation tank, wherein ultraviolet lamps are arranged in the water collecting sump area of the precipitation tank, and are arranged at the upper parts on the two sides of a water collecting sump in the length direction of the water collecting sump, and the cyclop type zooplanktons with negative phototaxis under certain radiation wavelengths can only move away from water collection holes. According to the method, stable removal effects can be achieved under the condition of not adding a chemical agent; the method is easy to operate, safe, reliable and low in input cost.

Description

technical field [0001] The invention belongs to the technical field of drinking water treatment, in particular to a method for removing hydrozoan zooplankton in drinking water treatment. Background technique [0002] In recent years, with the aggravation of eutrophication in raw water and the influence of human activities such as fishing, zooplankton have multiplied in large numbers, resulting in a significant increase in the number of Cyclops zooplankton entering the water plant. The conventional drinking water treatment process cannot completely remove the hydrozoan zooplankton, and the hydrozoan zooplankton breeds in the sand filter tank and the charcoal pond. Cyclops-like zooplankton can penetrate the filter tank and enter the water supply pipe network, resulting in biological risk problems of water quality. Effective removal of Cyclops zooplankton in the process of drinking water treatment has important practical significance for controlling the sensory properties ...

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Problems solved by technology

Studies have shown (Tang K W, Environmental microbiology, 2011,13(2): 378-39), the surface protection of zooplankton increases the resistance of microorganisms carried by zooplankton to residual chlorine by 30-120 times, and the microorganisms that are not inactivated release into water, restores to 10 within 3 days 6 Therefore, it is difficult to effectively inactivate the microorganisms carried by the disinfection dosage based on the inactivation of Cyclops zooplankton. Even dead zooplankton can enter the pipe network as microbial carriers after disinfection.

In order to ensure the inactivation of zooplankton and the microorganisms carried by them, a large amount of disinfectants may cause an increase in disinfection by-products. Therefore, it is urgent to find a safer and more effective control method

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