Low-carbon-source sewage treatment device and treatment method

Abstract

The invention discloses a low-carbon-source sewage treatment device and a treatment method. The treatment device comprises an anaerobic tank, an anoxic tank, an aeration tank, a secondary sedimentation tank, a biological selection mud-water separation tank, a phosphorus recovery tank, an ammonia nitrogen recovery tank, a high-solid-content anaerobic fermentation tank and a mud-water dehydration mechanism, the anaerobic tank, the anoxic tank, the aeration tank, the secondary sedimentation tank, the biological selection mud-water separation tank, the phosphorus recovery tank and the ammonia nitrogen recovery tank are sequentially connected along the flowing direction of sewage, and the high-solid anaerobic fermentation tank is connected with the biological selection mud-water separation tank. And the mud-water dehydration mechanism is connected with the high-solid-content anaerobic fermentation tank. The treatment device has the functions of carbon, nitrogen and phosphorus resource recovery and sludge reduction while ensuring that the sewage quality reaches the standard, the sludge source reduction is 33%, the phosphorus recovery rate reaches 92% or above, and the ammonia nitrogen recovery rate reaches 92%.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a low-carbon source sewage treatment device and treatment method. Background technique [0002] In the field of sewage treatment, the current sewage treatment process mainly faces the following three problems: 1) The cost of excess sludge treatment and disposal is high, and the treatment and disposal are difficult; 2) The low-carbon source characteristics of influent water often cannot be used in the process of nitrogen and phosphorus removal. At the same time, the requirements of denitrification and phosphorus removal are taken into account; 3) From the perspective of resource / energy recovery water plants, the recovery of carbon, nitrogen and phosphorus is also a problem that needs to be considered. In recent years, new processes for biological phosphorus and nitrogen removal have gradually emerged, such as the improved A 2 / O process, BICT process, etc., or denitrific...

AI Technical Summary

Problems solved by technology

[0002] In the field of sewage treatment, the current sewage treatment process mainly faces the following three problems: 1) The cost of excess sludge treatment and disposal is high, and the treatment and disposal are difficult; 2) The low-carbon source characteristics of influent water often cannot be used in the process of nitrogen and phosphorus removal. At the same time, the requirements of denitrification and phosphorus removal are taken into account; 3) From the perspective of resource / energy recovery water plants, the recovery of carbon, nitrogen and phosphorus is also a problem that needs to be considered

These new processes have relatively high requirements on numerical control and operating conditions, and their mechanism, process design and influencing factors are still in the exploratory stage, and cannot be effectively promoted and popularized in the short term.

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