Anaerobic-aerobic sewage treatment method based on three-phase separation

Abstract

The invention discloses an anaerobic-aerobic sewage treatment method based on three-phase separation. The method comprises the following steps: 1, establishing integrated sewage treatment equipment; 2, putting activated sludge into an anaerobic zone, an aerobic zone and a three-phase separation and sedimentation zone of the integrated sewage treatment equipment; 3, continuously introducing sewageinto the anaerobic zone through a water distributor; and 4, mixing one part of the supernatant obtained in the three-phase separation and precipitation zone into the sewage in the anaerobic zone, anddischarging the residual part. The occupied area of equipment is greatly reduced by improving the function integration degree; meanwhile, the dependence degree of electromechanical equipment is reduced by reasonably arranging functional area distribution, gas guiding is effectively implemented to solve the problems of sludge floating and running, and finally the technical effects of small size, low energy consumption and high sewage treatment efficiency are achieved.

Description

technical field [0001] The invention relates to an anaerobic and aerobic sewage treatment method based on three-phase separation. Background technique [0002] In the prior art, the integrated sewage treatment process is an energy-saving urban sewage biological treatment technology developed for the characteristics of low organic matter load and high nitrogen and phosphorus concentrations in urban sewage in my country. After several years of engineering application improvement and development, this technology has become a mature technology suitable for urban sewage treatment. However, there are obvious defects in practical application. The main reason is that the rear end of the biochemical pool needs to be equipped with a sedimentation tank alone, which occupies a large area; the secondary sedimentation tank needs to be equipped with a sludge return pump, and some even need to be equipped with a mud scraper, resulting in high energy consumption. , Equipment maintenance is ...

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Problems solved by technology

However, there are obvious defects in practical application. The main reason is that the rear end of the biochemical tank needs to be equipped with a sedimentation tank separately, which occupies a large area; the secondary sedimentation tank needs to be equipped with a sludge return pump, and some even need to be equipped with a mud scraper, resulting in high energy consumption. , Equipment maintenance is intensive and there are hidden dangers of sewage water quality exceeding the standard due to equipment failure and untimely maintenance; and there is denitrification of sludge at the bottom of the sedimentation tank or oxygen at the end of the aerobic tank enters the sedimentation tank, and sludge floats and runs away , which leads to the problem of low removal efficiency of phosphorus and suspended solids

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