Department of Civil Engineering, Indian Institute of Technology Guwahati, Assam, India.
Environ Technol. 2020 Sep;41(22):2884-2897. doi: 10.1080/09593330.2019.1587524. Epub 2019 Mar 11.
Anoxic-aerobic sequential moving-bed reactors were operated for the degradation of synthetic petroleum refinery wastewater containing phenol (750 mg/L), hydrocarbons (1250 mg/L), S (750 mg/L), NH -N (350 mg/L), NO N (1000 mg/L) and surfactant as nonylphenol-monoethoxylate (0.2 mmol/L). Kerosene, heavy oil and their mixture were used as hydrocarbon source. Anoxic reactor was a disc-bed reactor and aerobic reactor was moving-bed reactor operated at hydraulic retention times (HRT) of 48 and 16 h respectively at 27 ± 3°C. In anoxic reactor, removals of S and NO N were more than 99% along with 50-60% removal of hydrocarbons and phenol. Removal of organics deteriorated in anoxic reactor with heavy oil in feed having higher density and viscosity. Residual organics and NH -N were removed in aerobic reactor with more than 99% efficiency. Biomass activity decreased in anoxic reactor and increased in aerobic reactor with an increase in density and viscosity of hydrocarbon in feed. Abiotic study confirmed most of the removals were due to biodegradation.
缺氧-好氧序批式移动床反应器用于降解含有苯酚（750mg/L）、烃类（1250mg/L）、S（750mg/L）、NH 3 -N（350mg/L）、NO 3 -N（1000mg/L）和非离子表面活性剂壬基酚聚氧乙烯醚（0.2mmol/L）的合成炼油废水。煤油、重油及其混合物被用作烃类源。缺氧反应器为圆盘床反应器，好氧反应器为移动床反应器，在 27±3°C 下水力停留时间（HRT）分别为 48 和 16 h。在缺氧反应器中，S 和 NO 3 -N 的去除率超过 99%，同时去除了 50-60%的烃类和苯酚。当进料中重油的密度和粘度较高时，缺氧反应器中有机物的去除率恶化。好氧反应器可去除剩余的有机物和 NH 3 -N，去除效率超过 99%。随着进料中烃类密度和粘度的增加，缺氧反应器中的生物活性下降，好氧反应器中的生物活性增加。非生物研究证实，大部分去除是由于生物降解。
