Pool for primary treatment on domestic sewage and domestic sewage primary treatment method

Abstract

The invention discloses a pool for primary treatment on domestic sewage. The pool comprises a first-stage pool, a second-stage pool and a third-stage pool, wherein the first-stage pool is connected with the second-stage pool through a separating wall; a submersible sewage pump is arranged at the bottom part of the second-stage pool and is connected with the third-stage pool through a pipeline; the first-stage pool is provided with a sewage inlet pipe; the third-stage pool is provided with a water outlet pipe; the water outlet pipe is provided with a second electric gate valve; the separating wall is provided with a first electric gate valve; the submersible sewage pump is connected with the third-stage pool through a middle pipeline; the effective volumes of the first-stage pool, the second-stage pool and the third-stage pool are all greater than 0.5*q*t, wherein Q refers to the amount of domestic sewage generated by a domestic sewage source every day, and t refers to a domestic sewage hydrolysis period. The invention also provides a domestic sewage primary treatment method. According to the pool and the domestic sewage primary treatment method, disclosed by the invention, newly-generated domestic sewage can be separated from the domestic sewage in decomposing, so that full treatment of the domestic sewage is ensured, and the effluent quality effect is ensured.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a pool for preliminary treatment of domestic sewage and a method for preliminary treatment of domestic sewage. Background technique [0002] At present, the use of septic tanks to treat domestic sewage is widely used. Since the hydrolysis of domestic sewage takes a certain amount of time, during the hydrolysis process, new sewage is constantly entering, so that the newly entered sewage is mixed with the sewage that has been hydrolyzed for a period of time. This uneven hydrolysis will affect the septic tank. The water quality of the effluent. In traditional septic tanks, the hydraulic design residence time is only 12 to 24 hours, while the anaerobic digestion of sewage usually takes 7 days or longer. According to the survey, it is found that the capacity of septic tanks in many communities to remove organic matter is below 30%, and the function of septic tanks is useles...

AI Technical Summary

Problems solved by technology

Since the hydrolysis of domestic sewage takes a certain amount of time, during the hydrolysis process, new sewage is constantly entering, so that the newly entered sewage is mixed with the sewage that has been hydrolyzed for a period of time. This uneven hydrolysis will affect the septic tank. water quality

In traditional septic tanks, the hydraulic design residence time is only 12 to 24 hours, while the anaerobic digestion of sewage usually takes 7 days or longer

According to the survey, it is found that the removal capacity of septic tanks in many communities is below 30%, and the function of septic tanks is useless

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