Bioreactor for efficiently and economically synchronously removing nitrate nitrogen and ammonia nitrogen

Abstract

The invention discloses a bioreactor for efficiently and economically synchronously removing nitrate nitrogen and ammonia nitrogen. A water distribution area, from bottom to top, is sequentially provided with a sludge discharge pipe and a water return-inlet pipe, a transverse partition plate is respectively arranged between the upper end of a short-range denitrification area and the bottom of an anaerobic ammonia oxidation area and between the upper end of the anaerobic ammonia oxidation area and the bottom of a separation area, the upper end of the short-range denitrification area and the bottom of the anaerobic ammonia oxidation area, as well as the upper end of the anaerobic ammonia oxidation area and the bottom of the separation area, are respectively connected through a flange, the two transverse partition plates are respectively provided with a sludge guide pipe and a liquid guide pipe, the upper part of the short-range denitrification area and the upper part of the anaerobic ammonia oxidation part are respectively provided with a gas pulse tube, the short-range denitrification area and the anaerobic ammonia oxidation area are respectively filled with a ball packing layer, the side wall of the separation area, from bottom to top, is sequentially provided with a sludge discharge outlet, an overflow tank and a water outlet, the center of the separation area is provided with a double-effect three-phase separator, the side wall of the middle part of the double-effect three-phase separator is provided with a return pipe, and the upper part of the double-effect three-phase separator is provided with a gas collecting connecting pipe and a gas exhaust pipe. According to the invention, an effect of simultaneous denitrification and carbon removal is achieved without aeration; due to the adoption of pulse exhaust, the floating loss of sludge is controlled; because the double-effect three-phase separator is provided, gas, liquid and solid phases are effectively separated.

Description

technical field [0001] The invention relates to a denitrification reactor. In particular, it relates to an efficient and economical bioreactor for synchronously removing nitrate nitrogen and ammonia nitrogen. Background technique [0002] After the nationwide implementation of "source control and emission reduction", the organic pollution of wastewater has been effectively treated, and nitrogen and phosphorus pollution has become a major environmental problem. According to the "National Environmental Statistical Bulletin", in 2012, the total discharge of wastewater in the country was 68.48 billion tons, the discharge of chemical oxygen demand (COD) was 24.237 million tons, and the discharge of ammonia nitrogen was 2.536 million tons. Lake "blooms" and offshore "red tides" frequently occur due to pollution, which have endangered agriculture, fishery, tourism and many other industries, and pose a serious threat to drinking water sanitation and food safety. Water pollution ha...

AI Technical Summary

Problems solved by technology

The traditional biological denitrification method based on nitrification technology and denitrification technology has many defects, mainly including: ① Nitrification requires a large amount of oxygen, and the energy consumption of oxygenation is large; ② Denitrification requires a large amount of electron donors ( organic matter), high operating costs; ③The volumetric denitrification efficiency of the nitrification-denitrification process is low, resulting in a larger reaction tank volume and a larger floor area

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