【摘要】 对倒置A2/O工艺进行了缺氧池生物挂膜实验,结果表明,在化粪池出水COD有一定波动情况下,缺氧池COD去除率不仅较高且较稳定,有利于后续硝化反应的进行,提高系统的脱氮效果。同时研究了C/N在缺氧池中对脱氮效果的影响,C/N(质量比)>8.0脱氮效率达80%以上,C/N<6.0脱氮效果较差,证实了C/N是影响反硝化的关键因素。系统进水COD不高,影响了去除效果。更多还原

【Abstract】 Addition of bio-film carriers to allow attached growth in the anoxic tank of the inverted A2/O treatment system resulted in a more stable effluent with a lower COD,especially during the period when the feed COD concentration was highly variable. It also enhanced nitrification in the aerobic tank and thus improved the system’s capability of total nitrogen (TN) removal.A high C/N feed was essential for effective denitrification and for high TN removal. The improved inverted A2/O process removed > 80% of TN in the feed with a C/N of >8.0, the TN removal was much lower when the feed C/N was <6.0. Because of the low total phosphorousin the feed (TP<3 mg/L) and also the high COD removal achieved in the anoxic tank,no significant improvement in the overall TP removal was observed.更多还原