Integrated in-situ denitrification aquaculture wastewater biological treatment device and treatment method

Abstract

An integrated in-situ denitrification culture wastewater biological treatment device and treatment method relate to a sewage treatment device and treatment method. The invention aims to provide a treatment device and treatment method with low sludge yield, no refluxing process and good ammonia nitrogen treatment effect. The treatment device comprises a pool body, wherein the inside of the pool body is divided into an anaerobic carbon-removing area, an aerobic nitrification and precipitation area and an anoxic denitrification area through a plurality of partition plates; the aerobic nitrification and precipitation area comprises an aerobic aeration chamber, a precipitation chamber and the forth falling compartment; the anaerobic carbon-removing area is communicated with the upper part of the forth falling compartment, the bottom of the forth falling compartment is communicated with the bottom of the aerobic aeration chamber; the bottom of the aerobic aeration chamber is provided with an aeration device, the bottom of the aerobic aeration chamber is communicated with the bottom of the precipitation chamber; one side close to the precipitation chamber, of the middle part of the aerobic aeration chamber is provided with a stream-separating plate longitudinally; the stream-separating plate is used to form a stream-separating channel between the aerobic aeration chamber and the precipitation chamber; and the upper end of the stream-separating channel is communicated with the aerobic aeration chamber, and the lower end is communicated with the precipitation chamber.

Description

technical field [0001] The invention relates to a sewage treatment device and a treatment method, in particular to an integrated in-situ denitrification aquaculture wastewater biological treatment device and a treatment method. Background technique [0002] Although the development of the large-scale livestock and poultry breeding industry in China started late, its development momentum is very rapid, and it has reached a considerable scale in just over ten years, and continues to show a high-speed development trend. As the prevention and management of livestock and poultry pollution is far behind the rapid development of the industry, there is a lack of basic information and data on the pollution system of the livestock and poultry industry. While the rapid development of the aquaculture industry has brought huge economic benefits to the society, the environmental problems caused by the aquaculture wastewater discharged by it have become increasingly serious. The pollution ...

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Problems solved by technology

[0005] At present, there are many technologies for denitrification, the most representative ones are SBR method, A / O method, and oxidation ditch process. However, SBR method can only be applied to small sewage treatment plants, which has the advantages of long idle period of pool capacity and complicated operation management. and other shortcomings, the application in urban sewage treatment plants is seldom

The oxidation ditch process is a delayed aeration process, which has the disadvantages of high infrastructure and operating costs.

AA / O biological nitrogen removal process is the abbreviation of anaerobic / anoxic / aerobic biological nitrogen and phosphorus removal process. It is the most widely used nitrogen removal process in urban sewage treatment plants in my country. Denitrification operates under anoxic conditions. The removal of carbon-containing organic matter and the nitrification of ammonia nitrogen operate under aerobic conditions. Compared with the traditional multi-stage biological denitrification process, it has many advantages, but it only converts ammonia nitrogen into nitrate nitrogen, and does not really realize the nitrogen pollution. removal of

However, many studies only use the A / A / O space environment of aquaculture wastewater, consider the denitrification effect alone, and lack the research on the carbon-nitrogen ratio on nitrification and denitrification. Excessively high COD is not conducive to the growth of nitrification and denitrification bacteria. Affect the denitrification effect

If it is to be removed, a large amount of reflux power is required, and the treatment conditions are changed from anaerobic to aerobic to anoxic through effluent reflux to achieve denitrification. Therefore, the sewage treatment load is high and the operating cost is too high. This is the current sewage treatment in my country. The disadvantages of high energy consumption, low efficiency and unstable operation of plant biological denitrification

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