Optimizing hydrogen production from organic wastewater treatment in batch reactors through experimental and kinetic analysis
Optimizing hydrogen production from organic wastewater treatment in batch reactors through experimental and kinetic analysis
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DOI：
10.1016/j.ijhydene.2009.06.031
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发表时间：
2009-08
影响因子：
7.2
通讯作者：
Y. Sharma;Baikun Li
中科院分区：
文献类型：
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作者：
Y. Sharma;Baikun Li
有机废水厌氧制氢是一种新兴的从废水处理中产生清洁能源的生物技术，对环境和能源的可持续性至关重要。在本研究中，对不同水平的化学需氧量（COD）和pH两个关键参数下的产氢、生物量生长和有机底物降解进行了全面研究。产氢量与COD浓度呈负相关。当COD最低为1g/L时，比产氢率最高为2.1mol H2/mol葡萄糖；当COD最高为20g/L时，比产氢率降至0.7mol H2/mol葡萄糖。pH为5.5 ~ 6.0时产氢最佳，氢气/葡萄糖的平均产氢量为1.6mol H2/mol葡萄糖，而酸性pH（4.5）和中性pH（6.0 ~ 7.0）会降低产氢量。在所有操作条件下，乙酸和丁酸盐是液体发酵产物的主要成分。此外，还对生物质生长、底物降解和产氢进行了全面的动力学分析。微生物的最大生长速率（μm）和底物利用率（Rsu）分别为0.03g生物量/g生物量/天和0.25g葡萄糖/g生物量/天。产氢速率（[公式：见文]）的最适pH为5.89，最适SHY为5.74。根据动力学分析，预计间歇式厌氧制氢系统的最高[公式：见文本]和SHY为13.7mL/h和2.32mol H2/mol葡萄糖。
Anaerobic hydrogen production from organic wastewater, an emerging biotechnology to generate clean energy resources from wastewater treatment, is critical for environmental and energy sustainability. In this study, hydrogen production, biomass growth and organic substrate degradation were comprehensively examined at different levels of two critical parameters (chemical oxygen demand (COD) and pH). Hydrogen yields had a reverse correlation with COD concentrations. The highest specific hydrogen yield (SHY) of 2.1mole H2/mole glucose was achieved at the lowest COD of 1g/L and decreased to 0.7mole H2/mole glucose at the highest COD of 20g/L. The pH of 5.5–6.0 was optimal for hydrogen production with the SHY of 1.6mole H2/mole glucose, whereas the acidic pH (4.5) and neutral pH (6.0–7.0) lowered the hydrogen yields. Under all operational conditions, acetate and butyrate were the main components in the liquid fermentation products. Additionally, a comprehensive kinetic analysis of biomass growth, substrate degradation and hydrogen production was performed. The maximum rates of microbial growth (μm) and substrate utilization (Rsu) were 0.03g biomass/g biomass/day and 0.25g glucose/g biomass/day, respectively. The optimum pH for the rate of hydrogen production ( [Formula: see text] ) and SHY were 5.89 and 5.74 respectively. Based on the kinetic analysis, the highest [Formula: see text] and SHY for batch-mode anaerobic hydrogen production systems were projected to be 13.7mL/h and 2.32mole H2/mole glucose.