School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi Province, China.
Bioresour Technol. 2011 Feb;102(3):2555-62. doi: 10.1016/j.biortech.2010.11.103. Epub 2010 Nov 30.
Laboratory-scale experiments were conducted in order to evaluate the performance of a novel treatment process for oilfield wastewater based on combining chemical oxidation, performed by a zerovalent iron (ZVI), ethylenediamine tetraacetic acid (EDTA) and air process, with biological degradation, carried out in a batch activated sludge reactor. The influence of some operating variables was studied. The results showed that the optimum pretreatment conditions were 150 mg/L EDTA, 20 g/L ZVI, and a 180-min reaction time, respectively. Under these conditions, removal efficiencies for hydrolyzed polyacrylamide (HPAM), total petroleum hydrocarbons (TPH), and chemical oxygen demand (COD) were 66%, 59%, and 45%, respectively. During the subsequent 40 h of bioremediation, the concentrations of HPAM, TPH, and COD were decreased to 10, 2 and 85 mg/L, respectively. At the end of experiments, the total removal efficiencies of HPAM, TPH, and COD were 96%, 97% and 92%, respectively.
实验室规模的实验旨在评估一种新型的油田废水处理工艺的性能，该工艺基于结合化学氧化（由零价铁（ZVI）、乙二胺四乙酸（EDTA）和空气过程进行）和生物降解（在批量活性污泥反应器中进行）。研究了一些操作变量的影响。结果表明，最佳预处理条件分别为 150mg/L EDTA、20g/L ZVI 和 180min 反应时间。在这些条件下，水解聚丙烯酰胺（HPAM）、总石油烃（TPH）和化学需氧量（COD）的去除效率分别为 66%、59%和 45%。在随后的 40 小时生物修复过程中，HPAM、TPH 和 COD 的浓度分别降低至 10、2 和 85mg/L。实验结束时，HPAM、TPH 和 COD 的总去除效率分别为 96%、97%和 92%。
