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WASTEWATER PRETREATMENT METHOD AND SEWAGE TREATMENT METHOD USING THE PRETREATMENT METHOD
WASTEWATER PRETREATMENT METHOD AND SEWAGE TREATMENT METHOD USING THE PRETREATMENT METHOD
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机译:预处理方法及使用该预处理方法的污水处理方法
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摘要
A pretreatment method is provided, which comprises the following steps: (1) wastewater feed is introduced into a first end of a first aeration tank, and is mixed with a first concentrated mixture to obtain a first mixture; (2) the first mixture is aerated in the aeration stage of the first aeration tank to obtain a second mixture at a second end of the first aeration tank; (3) the second mixture is introduced into a first sedimentation tank to obtain a supernatant and the first concentrated mixture; (4) the supernatant is discharged and at least a part of the first concentrated mixture is refluxed to the first end of the first aeration tank. At the same time, a sewage treatment method applying the pretreatment method is provided. The pretreatment method can be used steadily for a long time without discharging sludge.
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