Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North-13, West-8, Sapporo 060-8628, Japan.
Department of Civil and Environmental Engineering, Faculty of Engineering, University of Ruhuna, Hapugala, Galle 80000, Sri Lanka.
Bioresour Technol. 2017 Nov;244(Pt 1):768-775. doi: 10.1016/j.biortech.2017.08.035. Epub 2017 Aug 9.
A hollow fiber degassing membrane (DM) was applied to enhance organic matter degradation and methane gas production of anaerobic granular sludge process by reducing the dissolved hydrogen gas (D-H) concentration in the liquid phase. DM was installed in the bench-scale anaerobic granular sludge reactors and D-H was removed through DM using a vacuum pump. Degasification improved the organic matter degradation efficiency to 79% while the efficiency was 62% without degasification at 12,000mgL of the influent T-COD concentration. Measurement of D-H concentrations in the liquid phase confirmed that D-H was removed by degasification. Furthermore, the effect of acetate concentrations on the organic matter degradation efficiency was investigated. At acetate concentrations above 3gL, organic matter degradation deteriorated. Degasification enhanced the propionate and acetate degradation. These results suggest that degasification reduced D-H concentration and volatile fatty acids concentrations, prevented pH drop, and subsequent enhanced organic matter degradation.
采用中空纤维除气膜（DM）通过降低液相中溶解氢气（D-H）浓度来增强厌氧颗粒污泥工艺中的有机物降解和甲烷气体生成。DM 被安装在实验室规模的厌氧颗粒污泥反应器中，并通过真空泵使用 DM 去除 D-H。在进水 T-COD 浓度为 12000mg/L 的情况下，脱气提高了 79%的有机物降解效率，而没有脱气时的效率为 62%。液相中 D-H 浓度的测量证实了脱气去除了 D-H。此外，还研究了乙酸浓度对有机物降解效率的影响。在乙酸浓度高于 3g/L 时，有机物降解恶化。脱气增强了丙酸和乙酸的降解。这些结果表明，脱气降低了 D-H 浓度和挥发性脂肪酸浓度，防止了 pH 值下降，从而随后增强了有机物降解。
