Synchronous nitrification and denitrification domestic sewage treatment method

Abstract

The invention discloses a synchronous nitrification and denitrification domestic sewage treatment method. Five rectangular reaction tanks are separated and used for treatment, a left reaction tank and a right reaction tank among three rectangular reaction tanks in a first row are provided with water inlets, two reaction tanks in a second row are provided with water inlet and outlet ports, the two rows form a rectangle, the two reaction tanks in the second row simultaneously function as settlement and reaction tanks, and different combined treatment stages are adopted according to water outlet requirements and nitrogen and phosphorus removal requirements. Full-flow treatment of water is subjected to water inlet anaerobic-anoxic-aerobiotic-settling treatment stages, the five rectangular reaction tanks in the two rows are provided with aeration devices, water passages are arranged on adjacent walls of the five rectangular reaction tanks, and clockwise or anticlockwise hydraulic circulation can be formed by switching water inlet and outlet positions.

Description

1. Technical field [0001] The invention relates to a new municipal sewage treatment process, which is aimed at the treatment of small and medium-sized municipal sewage, sewage treatment plants in villages and towns, and domestic sewage treatment in enterprises and institutions. 2. Background technology [0002] my country's water resources are short, and the per capita water resources are only 1 / 4 of the world's average level, and the increasingly serious water pollution situation has aggravated the crisis of water resources. In 2003, my country's main water systems, lakes and sea areas were seriously polluted. Among the 407 key monitoring sections of the seven major water systems, 38.1% of the sections met the water quality requirements of Class I to III, 32.2% of the sections met the water quality requirements of Class IV and V, and 29.7% of the sections met the water quality requirements of Class I to III. Inferior to Class V water quality. Among the 118 nationally contro...

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Problems solved by technology

For small and medium-sized sewage phosphorus and nitrogen removal processes, taking the above reflux measures will result in an increase in the area occupied by the sewage treatment facility, an increase in initial investment and complexity in maintenance and management

Moreover, the water quality and quantity of small and medium-sized sewage vary greatly, and the treatment facilities often require the characteristics of compact layout and automatic operation. There is also a problem of stability and adaptability in the use of traditional phosphorus and nitrogen removal processes.

[0004] Therefore, the treatment of small and medium-sized domestic sewage should develop simple and efficient complete sets of sewage treatment technologies, realize the automation of complete sets of sewage treatment equipment and control technology, reduce manpower consumption and maintenance costs, and solve the problems of high energy consumption and high land occupation in current urban sewage treatment plants. The problem

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