Energy-saving and environmental-protection process flow of sewage treatment

Abstract

An energy-saving and environmental-protection process flow of sewage treatment relates to the technical field of sewage treatment. The process flow is characterized by comprising the following steps: collecting waste water containing heavy metal through pipelines, sending into a grilling drainage and passing through a crude grilling; sending the waste water filtered by the crude grilling into a collecting well; supercharging the waste water in the collecting well through a pump and then lifting to an adjusting tank; stirring with a submersible mixer mounted in the adjusting tank; sending the waste water stirred in the adjusting tank to a pH adjusting tank through a lift pump; sending the waste water in the pH adjusting tank to a coagulation reaction tank; sending the waste water in the coagulation reaction tank into a primary settling tank for preliminary sedimentation; enabling supernatant in the primary settling tank to gravity flow to an A/O biochemical tank; decomposing the waste water in the A/O biochemical tank and then sending to a secondary settling tank; sending supernatant obtained through secondary sedimentation in the secondary settling tank to an middle tank; lifting the waste water in the middle tank to an active carbon pot through a pump; and sending the waste water adsorbed by the active carbon to a disinfection tank for disinfection. The process flow has advantages of environmental protection, energy saving, simple operation process and significant treatment effect.

Description

Technical field: [0001] The invention relates to the technical field of sewage treatment, in particular to an energy-saving and environment-friendly technological process for sewage treatment. Background technique: [0002] Sewage treatment: the process of purifying sewage to meet the water quality requirements of a certain water body for drainage or reuse. Sewage treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering, etc., and it is also increasingly entering the daily life of ordinary people. According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage, and medical sewage. According to the nature of water pollution, there are two types of water pollution: one is natural pollution; the ...

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Problems solved by technology

[0004] Nowadays, in the era of prosperous heavy industry, more and more heavy metals and toxic materials are discharged. If they are not treated, they will seriously exceed the national standards, which will bring unimaginable effects to producers, surrounding residents and the entire earth. Because the treatment of waste water and sewage is a way of high energy consumption and low efficiency, it will bring economic burdens to many enterprises, but if the problem is not dealt with, the problem will be more serious, which will make the development of enterprises go into a vicious circle

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