Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.
J Hazard Mater. 2011 Dec 15;197:26-32. doi: 10.1016/j.jhazmat.2011.09.052. Epub 2011 Sep 17.
An upflow anaerobic sludge blanket (UASB) bioreactor was successfully used for the treatment of petroleum refinery effluent. Before optimization, chemical oxygen demand (COD) removal was 81% at a constant organic loading rate (OLR) of 0.4 kg/m(3) d and a hydraulic retention time (HRT) of 48 h. The rate of biogas production was 559 mL/h at an HRT of 40 h and an influent COD of 1000 mg/L. Response surface methodology (RSM) was applied to predict the behaviors of influent COD, upflow velocity (V(up)) and HRT in the bioreactor. RSM showed that the best models for COD removal and biogas production rate were the reduced quadratic and cubic models, respectively. The optimum region, identified based on two critical responses, was an influent COD of 630 mg/L, a V(up) of 0.27 m/h, and an HRT of 21.4 h. This resulted in a 76.3% COD removal efficiency and a 0.25 L biogas/L feed d biogas production rate.
上流式厌氧污泥床（UASB）生物反应器成功地用于处理炼油厂废水。在优化之前，在恒定的有机负荷率（OLR）为 0.4kg/m³d 和水力停留时间（HRT）为 48h 的条件下，COD 去除率为 81%。在 HRT 为 40h 和进水 COD 为 1000mg/L 的条件下，沼气的产率为 559mL/h。响应面法（RSM）被应用于预测生物反应器中进水 COD、上流速度（V（up））和 HRT 的行为。RSM 表明，COD 去除率和沼气产率的最佳模型分别是简化二次和三次模型。基于两个关键响应确定的最佳区域为进水 COD 为 630mg/L、上流速度为 0.27m/h 和 HRT 为 21.4h。这导致 76.3%的 COD 去除效率和 0.25L 沼气/L 进料 d 的沼气产率。
