Zoroufchi Benis Khaled, Behnami Ali, Aghayani Ehsan, Farabi Somayeh, Pourakbar Mojtaba
Department of Chemical and Biological Engineering, University of Saskatchewan, Saskatoon, Saskatchewan, Canada.
Department of Environmental Health Engineering, Maragheh University of Medical Sciences, Maragheh, Iran.
Sci Total Environ. 2021 Oct 1;789:148068. doi: 10.1016/j.scitotenv.2021.148068. Epub 2021 May 29.
Combined biological and physicochemical process was selected for treatment of laundry wastewater. The results show that after microbial adaptation, almost 91% of COD was removed at food to microorganism (F/M) ratio of 0.12 gBOD/gMLSS·d. Dehydrogenase activity of the biomass showed an increasing trend and finally reached 3.8 μgTFg.d corresponding to the highest process performance. 16SrRNA fragment and phylogenetic analysis identified Pseudomonas pharmacofabricae and Bacillus spp. as the dominant bacteria. The effluent of the biological process was then injected into the UV/O process for complete removal of residual COD and detergent. Finally, microfiltration and ultrafiltration were used to remove any remaining suspended solids. The operating cost analysis showed that 0.65 €/m treated wastewater is required for treatment of the laundry wastewater. Accordingly, the suggested combination of the biological and physicochemical process could be a promising and highly efficient process for treatment and reuse of laundry wastewater.
选择生物和物理化学联合工艺处理洗衣废水。结果表明，经过微生物适应后，在食物与微生物（F/M）比为0.12 gBOD/gMLSS·d时，几乎91%的化学需氧量（COD）被去除。生物量的脱氢酶活性呈上升趋势，最终达到3.8 μgTFg·d，对应最高的工艺性能。16SrRNA片段和系统发育分析确定了药物假单胞菌和芽孢杆菌属为优势细菌。然后将生物处理过程的出水注入紫外/臭氧（UV/O）工艺，以完全去除残留的COD和洗涤剂。最后，使用微滤和超滤去除任何残留的悬浮固体。运行成本分析表明，处理洗衣废水每立方米需要0.65欧元。因此，建议的生物和物理化学联合工艺可能是一种有前景且高效的洗衣废水处理和回用工艺。
