所屬欄目:英漢雙解生物技術(shù)與遺傳工程
A secondary sewage-treatment process where biological processing of the sewage by microbial activity is the main method of treatment. In this step,sewage that has been previously treated in settling tanks is aerated in large tanks to encourage growth of m ......(本文共 702 字 ) [閱讀本文] >>