Department of Environmental Engineering, Mersin University, Mersin, 33343, Turkey.
Food Processing Programme, Technical Science Vocational School, Mersin University, Mersin, 33343, Turkey.
Chemosphere. 2022 Dec;308(Pt 2):136216. doi: 10.1016/j.chemosphere.2022.136216. Epub 2022 Sep 5.
In this study, the electrooxidation (EO) and membrane processes were used for chemical oxygen demand (COD) and total phenol (TPh) removal from wet scrubber wastewater (WSW). EO experiments were carried out using Al, Fe, SS, Ti, graphite, active carbon cloth electrodes and Box-Behnken design were used for optimization of maximum COD and TPh removal efficiency. Moreover, membrane filtration experiments were conducted to EO process using nanofiltration (NF270) and reverse osmosis membranes (SW30 and BW30). The maximum COD (55%) and TPh (50%) removal efficiency was achieved at pH of 8, 150 A/m current density, and 180 min reaction time in EO process. Membrane filtration results showed that COD removal efficiency was the highest for SW30 membrane (95.18%) compared to BW30 (91.15%) and NF270 (80.11%) membranes. TPh removal efficiency in the NF270, BW30, and SW30 membranes was 27.08%, 96.06%, and 98.02%, respectively. The effect of microbial cell viability of the raw and treated wet scrubber wastewater after electrooxidation and membrane filtration was also investigated using E. coli. In addition to these, biofilm inhibition of the raw wet scrubber wastewater and the treated WSW after EO and membrane filtration were tested and the highest biofilm inhibition was found as 76.43% and 72.58% against S. aureus and P. aeruginosa, respectively, in 1/20 diluted samples of the raw WSW. This study suggests that the integrated process using EO and pressure-driven membrane methods are an efficient strategy for COD and TPh removal from WSW.
在这项研究中，电化学氧化（EO）和膜过程被用于从湿式洗涤器废水中去除化学需氧量（COD）和总酚（TPh）。EO 实验使用 Al、Fe、SS、Ti、石墨、活性碳纤维布电极进行，采用 Box-Behnken 设计对最大 COD 和 TPh 去除效率进行优化。此外，还进行了膜过滤实验，使用纳滤（NF270）和反渗透膜（SW30 和 BW30）对 EO 工艺进行处理。在 EO 过程中，在 pH 值为 8、电流密度为 150 A/m 和反应时间为 180 min 的条件下，可实现最大 COD（55%）和 TPh（50%）去除效率。膜过滤结果表明，与 BW30（91.15%）和 NF270（80.11%）相比，SW30 膜的 COD 去除效率最高（95.18%）。NF270、BW30 和 SW30 膜对 TPh 的去除效率分别为 27.08%、96.06%和 98.02%。还研究了电化学氧化和膜过滤前后原始和处理过的湿式洗涤器废水对大肠杆菌细胞活力的影响。此外，还测试了原始湿式洗涤器废水和 EO 及膜过滤后的处理 WSW 的生物膜抑制作用，在原始 WSW 的 1/20 稀释样品中，对金黄色葡萄球菌和铜绿假单胞菌的生物膜抑制作用最高，分别为 76.43%和 72.58%。本研究表明，电化学氧化和压力驱动膜方法相结合的集成工艺是从湿式洗涤器废水中去除 COD 和 TPh 的有效策略。
