A／O生物法处理石化废水的研究

A study on petro-chemical wastewater treatment by A/O biological process

为了处理水质组成复杂，毒性大、有机物浓度较高的石化废水，采用先厌氧后好氧（即Ａ／Ｏ生物法）的处理方法。研究结果表明，石化废水经厌氧处理后，其好氧可生化性提高２０％～４０％；当厌氧反应器进水有机负荷为５．２ｋｇＣＯＤ／ｍ３·ｄ，水力停留时间为２４ｈ时，ＢＯＤ５去除率为８５％，ＣＯＤ去除率为８３％，油去除率为９１．１％；当曝气池污泥负荷为０．４５ｋｇＣＯＤ／ｋｇＭＬＳＳ·ｄ，水力停留时间为４ｈ时，ＢＯＤ５去除率为９４．１％，ＣＯＤ去除率为９２．７％，油去除率为９６．３％。系统ＣＯＤ总去除率为８５％～９６％，ＢＯＤ５总去除率为９５％～９９％。Ａ／Ｏ生物法为石化废水处理提供了理论依据。

t is relatively difficult to treat the component -complex petro-chemical wastewater.In this paper, authors put forward a method of treating petro-chemical wastewater by A/O biological process. A lot of experiments have shown that this method is fairly effective and practically feasible. When Fr=5. 2kgCOD/m3·d in the anaerobic reactor and Ns =0. 45kgCOD/kgMLSS·d in the aerobic biological treatment,the total COD removal is 85%～96% and BOD5 removal 95%～99%.