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  CAST工藝,污泥脫水后的混合液直接排入進水泵房,導致進水COD,SS偏高,并影響選擇池的反硝化反應(因為前段爆氣沉砂池已經降解了部分C源),應該如何解決?

  這是一個目前污水處理廠普遍被忽視的問題,即污泥脫水后的濾液回流至生化池后對生化處理的影響問題。由于污泥脫水前要加調質藥劑,如PAC和PAM,有些藥劑有一定的毒性,污泥脫水時可隨濾液回流至生化反應池。處理這些濾液在技術上沒問題,只是成本問題,如果選用合適的污泥調質藥劑,并控制好加藥量以及脫水機的進泥量等,對前面的生化處理就不會造成大的影響。還是強調的是,污泥脫水效果取決于污泥處理工序的全過程管理,包括污泥濃縮池的管理。

CAST工藝污泥脫水后的混合液直接排入進水泵房產生的問題
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