dump water pretreatment method and sewage treatment method using the pretreatment method

摘要

dump water pretreatment method and sewage treatment method using the pretreatment method. A pretreatment method is provided and provides the following steps: (1) Dump water 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 at 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 mixture concentrated; and (4) the supernatant is discharged and at least a portion of the first reflux concentrated mixture 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 stably for a long time without discharging mud.