CASS生化池的COD绝大部分是溶解性的有机物，对COD的去除率占总去除率的20.0%。
The COD of the CASS biochemical pool is mostly dissolved organic matter, the removal rate of which is 20.0%.
CASS生化池的COD绝大部分是溶解性的有机物，对COD的去除率占总去除率的20.0%。
The COD of the CASS biochemical pool is mostly dissolved organic matter, the removal rate of which is 20.0%.
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