Low anaerobic digestion efficiency of wheat straw (WS) has been an intractable problem owing to its high C/N ratio and complex structure. In this study, co-digestion of WS and waste activated sludge (WAS) at different ratios was performed to identify conditions that would elevate the acidic pH and increase methane production. The results showed that using a 1:1 ratio of WS and WAS, methane production in the co-digester was 26.9% higher than the sum of equal WAS and WS mono-digestion. When Fe₃O₄ was added to the co-digester, the acidic pH was further relieved and the anaerobic digestion efficiency was additionally enhanced. Microbial analysis showed that the ethanol-type fermentative bacterial genus Ethanoligenens was enriched in the WAS + WS-Fe₃O₄ reactor, in which the production of propionate was notably reduced, indicating that Fe₃O₄ could prevent the accumulation of volatile fatty acids by changing the types of fermentative bacteria present and promote anaerobic digestion efficiency.

小麦秸秆（WS）的低厌氧消化效率由于其高的C / N比和复杂的结构而成为一个棘手的问题。在这项研究中，以不同比例共消化WS和废物活性污泥（WAS），以确定可提高酸性pH值和增加甲烷产量的条件。结果表明，使用WS和WAS为1：1的比例，共消化器中的甲烷产量比等量WAS和WS单消化的总和高26.9％。当将Fe ₃ O ₄添加到共二酯中时，酸性pH进一步降低，并且厌氧消化效率进一步提高。微生物分析表明，乙醇型发酵菌乙醇杆菌属富含WAS + WS-Fe ₃O ₄反应器，其中丙酸的产生显着减少，表明Fe ₃ O ₄可以通过改变存在的发酵细菌的类型来防止挥发性脂肪酸的积累，并提高厌氧消化效率。