Mallick Subrat Kumar, Chakraborty Saswati
a Department of Civil Engineering , Indian Institute of Technology Guwahati , Assam , India.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2017 Nov 10;52(13):1257-1268. doi: 10.1080/10934529.2017.1356190. Epub 2017 Sep 18.
Objective of the present study was to simultaneously biodegrade synthetic petroleum refinery wastewater containing phenol (750 mg/L), sulphide (750 mg/L), hydrocarbon (as emulsified diesel of 300 mg/L), ammonia-nitrogen (350 mg/L) at pH >9 in anoxic-aerobic sequential moving bed reactors. The optimum mixing speed of anoxic reactor was observed at 20 rpm and beyond that, removal rate remained constant. In anoxic reactor the minimum hydraulic retention time was observed to be 2 days for complete removal of sulphide, 40-50% removal of phenol and total hydrocarbons and 52% of sulphur recovery. The optimum HRT of aerobic moving bed reactor was observed as 16 h (total HRT of 64 h for anoxic and aerobic reactors) for complete removals of phenol, total hydrocarbons, COD (chemical oxygen demand) and ammonia-nitrogen with nitrification.
本研究的目的是在缺氧-好氧序批式移动床反应器中，在pH>9的条件下同时对含有苯酚（750mg/L）、硫化物（750mg/L）、碳氢化合物（以300mg/L的乳化柴油形式存在）、氨氮（350mg/L）的合成炼油废水进行生物降解。缺氧反应器的最佳混合速度为20rpm，超过该速度后，去除率保持恒定。在缺氧反应器中，观察到完全去除硫化物的最短水力停留时间为2天，苯酚和总碳氢化合物的去除率为40-50%，硫回收率为52%。好氧移动床反应器的最佳水力停留时间为16小时（缺氧和好氧反应器的总水力停留时间为64小时），以实现苯酚、总碳氢化合物、化学需氧量（COD）和氨氮的完全去除以及硝化作用。
