The content of CODCr, salt and pH in effluent from saponification process of petrochemical plant are very high.
石化厂以氯醇法生产环氧乙烷过程中排出的皂化废水有机物含量高、含盐量高，并呈强碱性。
The experimental results show that the CODcr and BOD5 in the effluents decrease with all kinds of activated sludge methods.
本文采用运行方式不同的活性污泥法，对混凝处理后的废纸脱墨废水有机污染物的生物降解性能进行了试验。
The CODcr degradation is more difficult because acidizing wastewater contains many kinds of additives in which the composition of most organic matters is complicated.
油田酸化废水由于所含添加剂种类繁多，且有机成分复杂，使COD值的降解难度增大。
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