Harran University, Environmental Engineering Department, Osmanbey Campus, 63000 Sanliurfa, Turkey.
Bioresour Technol. 2011 Jan;102(2):683-9. doi: 10.1016/j.biortech.2010.08.042. Epub 2010 Aug 24.
The treatment of real acid mine drainage water (pH 2.7-4.3) containing sulfate (1.5-3.34 g/L) and various metals was studied in an ethanol-fed sulfate-reducing fluidized bed reactor at 35°C. The robustness of the process was tested by increasing stepwise sulfate, ethanol and metal loading rates and decreasing feed pH and hydraulic retention time. Highest sulfate reduction rate (4.6g/L day) was obtained with feed sulfate concentration of 2.5 g/L, COD/sulfate ratio of 0.85 and HRT of 12 h. The corresponding sulfate and COD removal efficiencies were about 90% and 80%, respectively. The alkalinity produced in sulfidogenic ethanol oxidation neutralized the acidic mine water. Highest metal precipitation efficiencies were observed at HRT of 24 h, the percent metal removal being over 99.9% for Al (initial concentration 55 mg/L), Co (9.0 mg/L), Cu (49 mg/L), Fe (435 mg/L), Ni (3.8 mg/L), Pb (7.5 mg/L) and Zn (6.6 mg/L), and 94% for Mn (7.21 mg/L).
研究了在 35°C 下，乙醇进料硫酸盐还原流化床反应器中处理实际酸性矿山排水（pH 2.7-4.3），其中含有硫酸盐（1.5-3.34g/L）和各种金属。通过逐步增加硫酸盐、乙醇和金属负荷率，以及降低进料 pH 值和水力停留时间，测试了该工艺的稳健性。在进料硫酸盐浓度为 2.5g/L、COD/硫酸盐比为 0.85 和 HRT 为 12h 的条件下，获得了最高的硫酸盐还原速率（4.6g/L·天）。相应的硫酸盐和 COD 去除效率分别约为 90%和 80%。硫化物生成乙醇氧化产生的碱度中和了酸性矿山废水。在 HRT 为 24h 时观察到最高的金属沉淀效率，对于 Al（初始浓度 55mg/L）、Co（9.0mg/L）、Cu（49mg/L）、Fe（435mg/L）、Ni（3.8mg/L）、Pb（7.5mg/L）和 Zn（6.6mg/L），金属去除率超过 99.9%，对于 Mn（7.21mg/L），金属去除率为 94%。
