在不添加外部化学物质的情况下，通过组合暗发酵和 LED 介导发酵处理纸板厂废水。
Paperboard mill wastewater treatment via combined dark and LED-mediated fermentation in the absence of external chemical addition.
机构信息
Department of Public Works Engineering, Faculty of Engineering, Tanta University, 31521 Tanta City, Egypt.
Department of Public Works Engineering, Faculty of Engineering, Mansoura University, Mansoura 35516, Egypt.
出版信息
Bioresour Technol. 2020 Jan;295:122312. doi: 10.1016/j.biortech.2019.122312. Epub 2019 Oct 21.
Paperboard mill wastewater (PMWW) was treated using two subsequent dark and photo up-flow intermitted stirring tank reactors (UISTRs) under different hydraulic retention times (HRTs) without external chemical use. HRT of 12 h revealed the maximum overall H productivity of 1394.1(±70.6) mL/L/d with contents of 48.9(±2.5) and 47.4(±1.4)% for dark- and photo-processes, respectively. Overall substrate removal efficiency (SDE) of 58.9(±4.5)% was registered at HRT o 12 h. High H productivity was ascribed to fermentation type occurred at dark reactor, since acetate and butyrate accounted for 70.9% of volatile fatty acids. Besides, pH and carbon to nitrogen ratio of dark reactor's effluent at HRT = 12 h were 5.5(±0.1) and 30.0(±2.5), respectively which are the optimum levels for photo fermentation process. Moreover, energetic and economic analyses emphasized on the superiority of 12 h-HRT, where net gain energy, daily saving and payback period accounted for 1319.5 kWh/d, 148.7 $/d and 9.8 years, respectively.
采用两个后续的暗式和光上流式间歇搅拌槽反应器（UISTR），在没有外部化学物质使用的情况下，在不同水力停留时间（HRT）下处理纸板厂废水（PMWW）。HRT 为 12 h 时，暗反应和光反应的最大总 H 生产率分别为 1394.1(±70.6) mL/L/d 和 48.9(±2.5)%和 47.4(±1.4)%。在 HRT 为 12 h 时，登记的总基质去除效率（SDE）为 58.9(±4.5)%。高 H 生产率归因于暗反应器中发生的发酵类型，因为乙酸盐和丁酸盐占挥发性脂肪酸的 70.9%。此外，HRT 为 12 h 时，暗反应器的出水的 pH 和碳氮比分别为 5.5(±0.1)和 30.0(±2.5)，这是光发酵过程的最佳水平。此外，能量和经济分析强调了 12 h-HRT 的优势，其中净收益能量、每日节约和投资回收期分别为 1319.5 kWh/d、148.7 美元/d 和 9.8 年。
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