在分流产酸段废气至产甲烷段的示意图下，产酸段气相压力对甲烷生成的影响。
Influence of acidogenic headspace pressure on methane production under schematic of diversion of acidogenic off-gas to methanogenic reactor.
机构信息
Lab of Waste Valorisation and Water Reuse, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, China; Sino-Forest Applied Research Centre for Pearl River Delta Environment, Institute of Bioresource and Agriculture, and Department of Biology, Hong Kong Baptist University, Hong Kong Special Administrative Region.
Sino-Forest Applied Research Centre for Pearl River Delta Environment, Institute of Bioresource and Agriculture, and Department of Biology, Hong Kong Baptist University, Hong Kong Special Administrative Region; Department of Plant Science, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli 627 012, Tamil Nadu, India.
出版信息
Bioresour Technol. 2017 Dec;245(Pt A):1000-1007. doi: 10.1016/j.biortech.2017.08.173. Epub 2017 Sep 1.
This study investigated the effects of 12.6psi (T1), 6.3psi (T2), 3.3psi (T3) and ambient (T4) headspace pressure on the metabolic pathways in the acidogenic leach bed reactor (LBR) and overall methane recovery during two-phase anaerobic digestion of food waste. Diversion of biogas from LBR enhanced COD and soluble product generation in T2, T3 and T4 whereas, high pressure (T1) resulted in comparatively higher lactate production and low protein degradation. A pressure of 3-6psi (T2 and T3) improved the production of COD by ∼22-36%, soluble products by ∼9-43%, volatile solid reduction by ∼14-19%, and CH production by ∼10-31% compared with control. Besides, ∼3-6psi headspace pressure positively influenced the composition of soluble products resulting in enhanced methane recovery adding advantage to the two-phase system. A headspace pressure of ∼3-6psi is recommended to enhance the hydrolysis-acidogenesis; however, the actual hydrogen concentration should be considered.
本研究考察了 12.6psi（T1）、6.3psi（T2）、3.3psi（T3）和环境（T4）顶空压力对两相厌氧消化过程中产酸层反应器（LBR）代谢途径和整体甲烷回收的影响。将沼气从 LBR 中分流出来，增加了 T2、T3 和 T4 中的 COD 和可溶性产物生成，而高压（T1）则导致乳酸盐生成较高，蛋白质降解较低。与对照相比，3-6psi（T2 和 T3）压力可将 COD 生成提高约 22-36%、可溶性产物提高约 9-43%、挥发性固体减少约 14-19%、CH4 生成提高约 10-31%。此外，顶空压力约为 3-6psi 对可溶性产物的组成产生积极影响，从而提高甲烷回收量，有利于两相系统。建议采用约 3-6psi 的顶空压力来增强水解-产酸过程；然而，应考虑实际的氢浓度。
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