期刊
BIORESOURCE TECHNOLOGY
卷 360, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.127617
关键词
Non-ionic surfactant; Emulsification; Palm oil mill effluent; Hydrogen yield; Anaerobic fermentation
资金
- Biogas
- Biorefinery Laboratory
- Prince of Songkla University (PSU)
This study evaluated the effectiveness of non-ionic surfactants with different structures in biohydrogen production from palm oil mill effluent. The results showed that adding an appropriate amount of surfactants significantly increased the hydrogen yield in the wastewater. For continuous digestion studies, wastewater supplemented with surfactants outperformed pure wastewater in terms of hydrogen production efficiency.
Residual oil in palm oil mill effluent (POME) poses difficulties in its treatment chain. Non-ionic surfactants containing different hydrophobic tail structures and their optimal concentrations were evaluated for effectiveness in biohydrogen production. By adding the surfactants at their critical micelle concentration in synthetic oily wastewater, the maximal H2 yield was increased by 2.2 and 3.5 times for Triton X-100 and Tergitol 15-S-9, respectively, compared to the control. Using real POME, the supplemental Tergitol 15-S-9 resulted in a 56.4 % improvement in H2 production. For continuous digestion studies, pure POME and Tergitol 15-S-9 supplemented POME (sPOME) were fed to thermophilic anaerobic sequencing batch reactors (ASBRs) under hydraulic retention time (HRT) of 32-12.5 days. Optimally at HRT 19 days, H2 content in the biogas from sPOME-fed ASBR was noticeably higher, which gave a superior yield of 203.4 mLH2/gCODremoved (+15 %).
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