Multiple wastes’ co-digestion is one of the alternatives for improved anaerobic digestion (AD) process of industrial and municipal wastes. The present work investigated the influence of fruit–vegetable solid waste (FVW) addition as a co-substrate on the performance of AD of abattoir wastewater (AWW). The co-digestion was done at a lab-scale-based experiment under mesophilic condition using a two-phase anaerobic sequencing batch reactor without agitation. It was tested at different mixing ratios (100%AWW; 75%AWW:25%FVW; 50%AWW:50%FVW; 25%AWW:75%FVW; 100%FVW) with the intention of looking for the best mixing ratio with the best performance. It was fed on a semi-continuous basis and operated for 18 days (d) total retention time (HRT): 3 days for the acidogenesis reactor and 15 days for methanogenesis reactor. The addition of FVW enhanced biogas yield and VS removal by 70.26% and 57.11%, respectively, at optimum mixing ratio. Moreover, to some extent improvement of AD process stability verified by the decreased TVFA:TAlk ratio and free ammonia nitrogen was observed upon progressive addition of FVW. Finally, this co-digestion process should further be studied for its performance at different HRTs with agitation.

中文翻译：

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富碳废物作为共底物对屠宰场无搅拌厌氧消化性能和稳定性的影响

多种废物的共同消化是改善工业和城市废物的厌氧消化（AD）工艺的替代方法之一。目前的工作调查了水果蔬菜固废（FVW）作为共同基质对屠宰场废水（AWW）AD性能的影响。共消化是在中温条件下，在不进行搅拌的情况下，使用两相厌氧测序间歇反应器，在基于实验室规模的实验中完成的。为了寻求最佳的混合比，在不同的混合比例（100％AWW； 75％AWW：25％FVW； 50％AWW：50％FVW； 25％AWW：75％FVW； 100％FVW）下进行了测试表现最佳。半连续进料并操作18天（d）总保留时间（HRT）：酸生成反应器3天，甲烷生成反应器15天。在最佳混合比下，FVW的添加分别提高了沼气产率和VS去除率70.26％和57.11％。此外，在逐步添加FVW时，观察到在一定程度上通过降低的TVFA：TAlk比和游离氨氮证实了AD工艺稳定性的提高。最后，应进一步研究这种共消化过程在搅拌下在不同HRT上的性能。