Grass carp, cladophora and daphnia hyaline multi-organism cooperated algae control method

Abstract

The present invention relates to a method of cooperative control of alga in a water body comprising grass carp, cladophora and daphnia hyaline, which relates to a water treatment method and solves the problem of high operating cost and much of the by-products of the current alga control method. In the present invention grass carp is cultured in eutrophication water body with a culturing density of 20~100 g / m<3> and a single weight of 20~100 g; a floating net cage is arranged in the eutrophication water body, which is an open net cage made from stainless wire net having an aperture of 4~6 mm, besides, the four corners of the upper bottom of the floating net cage are provided with floater, by which the side walls of the floating net cage can overtop the water level by 0.2~0.4 m. The present invention is simple and easy, and can reduce the alga content and the trophic level in raw water of water plant effectively so as to solve the problem of that the eutrophication high algae-laden raw water affects the conventional treatment in current water plant, to reduce the cost and improve the water quality. The present invention make the best of the food habit difference between grass carp and daphnia hyaline, and comparing with the prior art, the present invention is simple and easy, economy and shortcut, and has high efficiency and convenient operation.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for synergistically controlling algae content in eutrophic raw water of a water plant by using a variety of freshwater aquatic organisms. Background technique [0002] Eutrophication of water body is a water body effect caused by excessive input of nutrients such as nitrogen and phosphorus. It is mainly manifested in the excessive growth of algae in water, accompanied by a series of changes in water quality and water ecology, resulting in a decrease in water transparency and deterioration of water quality. Eutrophication of raw water greatly affects the normal production of waterworks. [0003] Among the existing algae removal methods, there are chemical methods using strong oxidants and algicides as algae removal methods, physical and chemical methods represented by air flotation, and physical methods such as microfiltration and membrane filtration. The common advantage of c...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high operating cost and many by-products in the existing algae control methods, and provide a method for synergistic algae control of grass carp, Cladophora and hyaline multi-organisms