Wastewater treatment system and method for removing carbon, nitrogen, phosphor in wastewater

Abstract

This invention discloses a wastewater treatment system for removing C, N and P in wastewater. The wastewater treatment system comprises: a first tank, a second tank behind the first tank, a third tank behind the second tank and a thin film in the third tank or behind the third tank. The first tank contains methane bacteria, phosphorus-accumulating bacteria and denitrification bacteria. The denitrification bacteria can remove part of organic carbon by denitrification. The phosphorus-accumulating bacteria can adsorb part of organic carbon and release phosphate. The methane bacteria can metabolize organic carbon to produce methane. The second tank can treat the effluent of the first tank with denitrification bacteria and phosphorus-accumulating bacteria. The third tank can perform aerobic metabolism on the organic carbon adsorbed by the first and the second tanks with phosphorus-accumulating bacteria, convert ammonia nitrogen into nitric acid nitrogen with denitrification bacteria, and remove residual organic pollutants in the effluent of the second tank together with other aerobic microorganisms. The thin film can separate the microorganisms and the treated effluent. This invention also relates to a method for removing C, N and P with the wastewater treatment system, which can reduce residual sludge productivity and reduce power loss.

Description

technical field [0001] The invention relates to a novel waste water treatment system and method for removing carbon, nitrogen and phosphorus organic matter in waste water, which mainly applies methane bacteria to the waste water treatment system, which can effectively reduce the output of excess sludge and reduce power consumption. Background technique [0002] Most of the early wastewater treatment systems were designed for the purpose of reducing organic pollution, so as to avoid the consumption of oxygen in the water due to microbial decomposition of organic matter after it was discharged into the water body, resulting in a decrease in dissolved oxygen in the water body and affecting the survival of aquatic organisms. However, in addition to organic matter, urban sewage also contains rich nitrogen and phosphorus. These compounds are essential nutrients for the growth of various algae. Under appropriate temperature and sufficient sunlight, the rich nitrogen and phosphorus w...

AI Technical Summary

Problems solved by technology

Therefore, develop a waste water treatment technology, can remove carbon, nitrogen, phosphorus in the waste water simultaneously and improve the traditional waste water treatment system power consumption is big and produces the problem of a large amount of sludge (such as A 2 O), is a topic worthy of research in the industry

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