Series method for removing algae by using zooplankton and filter-feeder fishes

Abstract

The invention relates to a method for removing algae by series connection of zooplankton and filter-feeding fish, which relates to a method for controlling the removal of algae in eutrophic water. The invention can solve the problem that the algae in natural water can not be completely removed by utilizing aquatic organisms. The method of the invention is that first, at least two sluice facilities are connected with each other in series; then, the algae-containing water sequentially flows through every sluice facility; the hydraulic retention time of every sluice facility is one to three days; the zooplankton and the filter-feeding fish are alternatively stocked in the two neighboring sluice facilities; the stocked zooplankton are mainly daphnia magna which eats micro algae; at the same time, all the fishes in the sluice facility which stocks the zooplankton are completely cleaned out or predatory fishes are threw in; the stocked fishes in the sluice facility which stocks filter-feeding fishes are silver carp and bighead carp or only the silver carp is stocked. The stocking density of the silver carp is 40 to 200g / m<3>; every single silver carp weighs 60 to 500 grams; the stocking density ratio of the bighead carp and the silver carp is 1:3 to 1:5; every single bighead carp weighs 60 to 500 grams. The method of the invention can completely remove the algae in the natural water.

Description

technical field

[0001] The invention relates to a method for controlling the removal of algae in eutrophic water bodies, belonging to the fields of biology, environmental ecology and water treatment. Background technique

[0002] Eutrophication of water body is a worldwide problem, and our country and other countries in the world are facing huge challenges. Eutrophication of water body has great harm to ecosystem, economic development and human health. The eutrophication of the water body destroys the self-purification ability of the water body and the structure of the food chain, and at the same time destroys the landscape. When the cyanobacteria bloom breaks out, it forms a paint-like algae slurry and produces a foul smell. The rapid proliferation of algae caused by the eutrophication of the water body has brought great trouble to the treatment of drinking water, increased the cost of water treatment, and made it difficult to guarantee the quality of the effluent water. ...