但油井在压裂过程中产生的压裂返排液已成为当前油田水体污染源之一。
However, it produces the fracturing liquid in fracturing, which has become one of the current oil field water pollution sources.
为此，深入研究压裂返排液的处理方法，对油气田环境污染控制具有重要意义。
It is important to research the treatment method of the fracturing to control oil field waste.
压裂返排液的主要成分是羟丙基胍胶及其它的有机添加剂，具有COD严重超标的污染特征。
Hydroxypropylguar gum and other organic additives are the predominant components of fracturing fluid recovery, which have excessive CODCr, the most important polluting characteristic of the sewage.
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