Yesil Hatice, Calli Baris, Tugtas Adile Evren
Department of Environmental Engineering, Marmara University, 34722 Goztepe, Istanbul, Turkey.
Department of Environmental Engineering, Marmara University, 34722 Goztepe, Istanbul, Turkey.
Water Res. 2021 Mar 15;192:116831. doi: 10.1016/j.watres.2021.116831. Epub 2021 Jan 11.
Anaerobic dry-fermentation of food wastes can be utilized for the production of volatile fatty acids (VFA). However, especially for high load fermentation systems, accumulation of VFAs may result in inhibition of fermentation process. In this study, separation of VFAs from synthetic mixtures via a vapor permeation membrane contactor (VPMC) system with an air-filled polytetrafluoroethylene (PTFE) membrane was assessed at various temperatures and permeate solution concentrations. In addition, a pioneering integrated leach-bed fermentation and membrane separation system was operated with undefined mixed culture for the purpose of enhanced VFA production along with its recovery. Hybrid system resulted in 42% enhancement in total VFA production and 60% of total VFAs were recovered through the VPMC system. The results of this study revealed that integrated system can be exploited as a means of increasing organic loading to fermentation systems and increasing the value of VFA production.
食物垃圾的厌氧干式发酵可用于生产挥发性脂肪酸（VFA）。然而，特别是对于高负荷发酵系统，挥发性脂肪酸的积累可能会导致发酵过程受到抑制。在本研究中，评估了在不同温度和渗透液浓度下，通过带有充气聚四氟乙烯（PTFE）膜的蒸汽渗透膜接触器（VPMC）系统从合成混合物中分离挥发性脂肪酸的情况。此外，还运行了一个开创性的集成渗滤床发酵和膜分离系统，该系统采用未定义的混合培养物，目的是提高挥发性脂肪酸的产量及其回收率。混合系统使挥发性脂肪酸的总产量提高了42%，并且60%的总挥发性脂肪酸通过VPMC系统得以回收。本研究结果表明，集成系统可作为一种增加发酵系统有机负荷和提高挥发性脂肪酸生产价值的手段加以利用。
