Integrated oxidation ditch, construction and operation method

Abstract

The invention discloses an integrated oxidation ditch and a construction and operation method thereof. The construction and operation method has the technical proposal that the integrated oxidation ditch is divided into an anoxic zone, an anaerobic zone and an aerobic zone, which are communicated mutually, the anoxic zone and the anaerobic zone are arranged at one end of the integrated oxidation ditch in common, the aerobic zone is arranged at the other end of the integrated oxidation ditch, and a water-retaining wall is arranged at the middle part of each zone to cause each zone to be formed a single annular channel, water inlet pipes used for feeding water by the division point way are arranged at the anoxic zone and the anaerobic zone, an aeration device is arranged in a circulation channel at one side of the aerobic zone communicated with the anoxic zone, and a mud-water separation device used for the mud-water separation and the water emission is built on the side wall of the aerobic zone for the water emission. The aeration device is started, and the sewage passes through the anoxic zone, the anaerobic zone, the aerobic zone, and the mud-water separation device in sequence, so the dephosphorization and the denitrification as well as the decarbonization treatments of the sewage are realized. The integrated oxidation ditch has the advantages of simple structure, lower cost, small occupation area, and good sewage treatment effect, and can particularly and effectively perform the dephosphorization and the denitrification simultaneously.

Description

technical field [0001] The invention relates to an integrated oxidation ditch and its construction and operation method, belonging to the field of sewage treatment. Background technique [0002] With the rapid development of small towns in our country, at present, the construction of urban sewage treatment plants in our country is very fast, and most of the sewage treatment technologies used have got rid of the traditional activated sludge method and introduced sewage treatment technologies from developed countries, such as SBR, CASS, UNITANK , MSBR, ICEAS, Carrousel oxidation ditch, etc., but these technologies require a high degree of automation and are highly dependent on imported equipment and instruments. However, due to historical reasons, the drainage system of most cities and towns in my country is a combined system (that is, rainwater and sewage are combined into the water body), the concentration of sewage inflow is not high, and computer network technology and inf...

AI Technical Summary

Problems solved by technology

Not only that, but there are also the following disadvantages in the actual operation process: the overall treatment effect is affected due to the uncoordinated sludge discharge cycle; the carbon source for denitrification is insufficient; the return sludge will bring part of the nitrate into the anaerobic zone, making the phosphorus accumulating bacteria Phosphorus release is inhibited, thus affecting the phosphorus removal effect

In summary, due to the dual functional requirements of denitrification and phosphorus removal, there are contradictions in its operating conditions. In actual operation, the traditional A 2 / O process is difficult to achieve simultaneous and efficient nitrogen and phosphorus removal, and the degree of reasonable coordination is not ideal

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