Integrated cage-type denitrification reactor

Abstract

The invention discloses an integrated cage-type denitrification reactor. The reactor body is provided with a water inlet zone, a reaction zone and a separation zone from the bottom up. The water inlet zone is provided with a sludge discharge pipe, a water flow steering zone, a water inlet pipe and an air inlet pipe from the bottom up. The upper end of the air inlet pipe is provided with an aeration head. The reaction zone is equipped with a longitudinal partition board to divide the reaction zone into an aerobic zone and an anaerobic zone. The aerobic zone and the anaerobic zone are respectively separated into three cages by four perforated baffles, and 1 / 4-1 / 3 of each cage is filled with a sinking / floating porous filling material. The separation zone is provided with a longitudinal partition board to divide the separation zone into a settling zone and a gas release zone which are communicated through an upper guide plate and a lower guide plate. The top of the settling zone is provided with an overflow weir, and a water outlet pipe is disposed at the bottom of an overflow groove. The invention integrates short-cut nitrification and anaerobic ammonium oxidation, can avoid biotoxicity caused by nitrite accumulation, and also can overcome matrix proportion regulation problem. The spatial distribution of functional bacteria is relatively fixed, thus being in favor of micro-ecological environment optimization. Driven by an ascending air current, the reaction solution undergoes internal circulation, nitrification and denitrification occur alternately, thus contributing to mass transfer and reaction as well as improvement of volume denitrification efficiency.

Description

technical field [0001] The invention relates to a biological denitrification reactor, in particular to an integrated cage type denitrification reactor. Background technique [0002] After the pollution control and emission reduction during the "Eleventh Five-Year Plan" period, the chemical oxygen demand has been effectively controlled, and ammonia nitrogen pollution has become a major environmental problem. According to the Environmental Status Bulletin issued by the Ministry of Environmental Protection, in 2010, the national discharge of ammonia nitrogen in wastewater was 1.203 million tons, and ammonia nitrogen has become the main pollution indicator of the seven major water systems. After the organic pollutants are removed, the low carbon-to-nitrogen ratio becomes the main water quality characteristic of non-standard wastewater. Since the C / N ratio of substandard wastewater often cannot meet the value required by traditional denitrification technologies, the biological t...

AI Technical Summary

Problems solved by technology

However, in the traditional design, the short-cut nitrification process and the anammox process are usually divided into two devices, which is easy to cause nitrite accumulation, inhibit ammonia oxidation, and limit the efficiency of the process; in addition, due to the anammox The ratio of ammonia nitrogen and nitrite nitrogen required by the oxidation process is 1:1.32, which is difficult to control in actual engineering

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