污水污泥产酸发酵实现碳中性的有机资源回收：一项测试顶空影响的实验调查。
Sewage sludge acidogenic fermentation for organic resource recovery towards carbon neutrality: An experimental survey testing the headspace influence.
机构信息
Engineering Department, Palermo University, Viale delle Scienze bldg. 8, 90128 Palermo, Italy.
Engineering Department, Palermo University, Viale delle Scienze bldg. 8, 90128 Palermo, Italy.
出版信息
Bioresour Technol. 2023 Jan;367:128217. doi: 10.1016/j.biortech.2022.128217. Epub 2022 Nov 1.
Volatile fatty acids (VFAs) produced by acidogenic digestion of sewage sludge are very interesting bio-products which can contribute to carbon neutrality of wastewater treatment plants. Studies on the production of VFAs from sewage sludge from fermenters with membrane are limited. In view of above, VFAs from a fermenter pilot plant equipped with a membrane bioreactor and fed with real sewage sludge has been monitored. The effect of headspace volume (HdV) on VFA production was studied for the first time to elucidate the optimal operation conditions. Specifically, three fermenter HdV values (namely, 20, 40 and 60% of the total volume) have been investigated. Results revealed that the HdV of 20% ensured the highest sCOD production (900 mgCOD/L) and VFA/COD ratio (45.4%). High value of HdV (namely, 40 and 60%) strongly decreased the acidogenic fermentation performance in terms of VFA production.
挥发性脂肪酸（VFAs）是由污水污泥的产酸消化产生的，非常有趣的生物产物，可以为污水处理厂的碳中和做出贡献。关于从带有膜的发酵器中的污水污泥生产 VFAs 的研究有限。有鉴于此，对配备膜生物反应器并以实际污水污泥为食的发酵器中试工厂的 VFAs 进行了监测。首次研究了气室体积（HdV）对 VFA 生产的影响，以阐明最佳操作条件。具体来说，研究了三种发酵器 HdV 值（即总容积的 20%、40%和 60%）。结果表明，20%的 HdV 确保了最高的 sCOD 产量（900mgCOD/L）和 VFA/COD 比（45.4%）。高 HdV 值（即 40%和 60%）会强烈降低产酸发酵性能，从而降低 VFA 产量。
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