Journal
WATER RESEARCH
Volume 192, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2021.116831
Keywords
Anaerobic; Carboxylate platform; Fermentation; Membrane; Separation; Short chain fatty acids
Funding
- The Scientific and Technological Research Council of Turkey (TUBITAK) [112Y218]
- Marmara University Scientific Research Project [FEN-A-100413-0126]
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The study demonstrated that utilizing a vapor permeation membrane contactor system can effectively separate volatile fatty acids, and an integrated leach-bed fermentation and membrane separation system can increase VFA production and recovery rate, which is beneficial for high load fermentation systems.
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. (c) 2021 Elsevier Ltd. All rights reserved.
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