水解酸化-缺氧生物法处理油田废水的机理

 采用水解酸化-缺氧生物法对经物化预处理的油田废水进行试验研究.当进水COD为190～230mg/L,水解酸化段和缺氧段停留时间分别为10,48h时,出水COD为75～83mg/L.运用GC/MS分析油田废水有机污染物在工艺流程中相对组分变化的规律,表明水解酸化和缺氧法处理油田废水时有协同作用,可有效降解废水中酚类化合物、酮类化合物、芳烃和BTEX.运用PCR-DGGE技术,考察不同生物反应器内微生物种群及其分布特征,初步确定水解酸化和缺氧反应器内的优势菌种.

Mechanism of oilfield wastewater treatment with hydrolysis acidification anoxic biological processes

The hydrolysis acidification anoxic biological processes were applied to treat oilfield wastewater pretreated with physical and chemical technique. When the COD of influent water was 190~230mg/L, and HRT was 10, 48h respectively in the hydrolysis acidification and anoxic stage, the COD of effluent water was 75~83mg/L. The GC/MS was used to analyze the changes of relative component of main organic waste in technique process indicating that phenolic and ketonic compounds, aromatic hydrocarbon and BTEX could be degraded effectively when there existed the coordinative action of hydrolysis acidification and anoxic treatment of oilfield wastewater. In different bioreactor the microbial community and its distribution character were impacted using PCR-DGGE technology, and the predominant bacteria species in the hydrolysis acidification and anoxic reactors were determined preliminary.