The effluent disposal system in certain pulp and paper mills was a two-stage biochemical treatment process.

某制浆造纸厂污水处理原采用二级生化处理工艺。

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The effluent disposal system in certain pulp and paper mills was a two-stage biochemical treatment process.

某制浆造纸厂污水处理原采用二级生化处理工艺。

youdao