Method for treating artificial wetland breeding wastewater by integration of straw, biochar and organism

Abstract

The invention discloses a method for treating artificial wetland breeding wastewater by integration of straw, biochar and organism. According to the method, breeding wastewater passes an anaerobic fermentation tank, three substrate tanks and four wetland tanks in sequence; a substrate channel is arranged between the anaerobic fermentation tank and the first substrate tank, between two adjacent substrate tanks, as well as between the third substrate tank and the first wetland tank; straw is laid in the substrate channels and the substrate tanks; wild plants are added onto the straw; a water blocking drop water dam is arranged at the water outlet of each substrate tank; the wetland tanks are surrounded by ridges; two adjacent wetland tanks are separated through one ridge; overflow openings of which the cross sections are in the shape of an inverted trapezoid are formed in the upper end surfaces of two ridges of each wetland tank; myriophyllum verticillatum is added into each wetland tank; a biochar layer is arranged in front of the overflow opening, near discharged water, of the last wetland tank. According to the method for treating artificial wetland breeding wastewater by integration of straw, biochar and organism, the water quality of the end discharged water is greatly superior to the water pollutant discharge standard of the national breeding industry.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for treating aquaculture wastewater by a straw-biochar-biological integrated constructed wetland. Background technique [0002] With the rapid development of my country's social economy and the acceleration of urbanization, on the one hand, the contradiction between urban water supply and demand has become increasingly prominent, and on the other hand, the massive discharge of huge amounts of waste water and sewage has continuously polluted water sources, further deteriorating the water quality environment. At present, among the more than 600 cities in our country, more than 400 cities have different degrees of water shortage problems. The annual water shortage reaches 6 billion tons, and the economic loss caused by water shortage is nearly 300 billion yuan per year. At the same time, the annual sewage discharge in my country's cities has reached 41.4 billion ton...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, to provide a straw-biochar-bio-integrated artificial wetland method for treating aquaculture wastewater, to organically combine environmental management with aquaculture and planting, and to fundamentally solve the problem of aquaculture. The environmental pollution of waste, while achieving the standard discharge of aquaculture wastewater and improving the local ecological environment, significantly reduces the pollution control cost of the enterprise, further extends the industrial chain of the enterprise, and uses aquaculture waste to produce high-quality organic fertilizer and high-quality green fodder , to improve the economic benefits of the farming industry

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