Aquaculture wastewater treatment method for freshwater pool and multifunctional compound ecological ditches

Abstract

The invention relates to an aquaculture wastewater treatment method for a freshwater pool, wherein in a drainage channel of aquaculture wastewater, the total channel of the drainage channel is partitioned into a plurality of rinsing channels so as to respectively construct types of ecological ditches in different purifying types. For exampled, four channels are constructed. Large emergent aquatic plants are planted in the ecological ditch I, filtering-feeding fishes and shells are bred in the ecological ditch II, a biological floating bed is placed in the ecological ditch III and three-dimensional elastic filler is placed in the ecological ditch IV. Each ecological ditch is provided with a separating rinsing port, and single or multiple ecological ditches are drained specifically according to water quality situation.

Description

technical field [0001] The invention relates to a method for purifying aquaculture sewage in freshwater ponds and a multifunctional composite ecological ditch based on the method, belonging to the technical field of aquaculture. Background technique [0002] China is the largest aquaculture country in the world. Pond aquaculture is the main way of aquaculture in my country. According to the 2012 Fishery Statistical Yearbook, in 2011, my country had a pond aquaculture area of ​​2566.86 thousand hectares, accounting for 43.45% of the total freshwater aquaculture area and 31.74% of the national aquaculture area; the output of pond aquaculture 18.6642 million tons, accounting for 70.58% of the output of freshwater products and 43.52% of the total output of aquatic products in the country. The pond culture model has become an indispensable force in the development of fisheries. However, some problems in pond culture are becoming more and more prominent, especially the massive wa...

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Problems solved by technology

[0004] The sewage from aquaculture farms and nursery farms in my country is basically discharged directly without treatment. In addition, there are a large number of farms in many places and the distance is close. The water inlets and outlets between the farms are often close at hand. The quality of domestic and production water; at the same time, traditional aquaculture mainly relies on a large number of water changes to regulate water quality, which consumes a lot of water resources

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