Temperature effects on the methanogenesis enhancement and sulfidogenesis suppression in the UASB treatment of sulfate-rich methanol wastewater
Temperature effects on the methanogenesis enhancement and sulfidogenesis suppression in the UASB treatment of sulfate-rich methanol wastewater
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DOI：
10.1016/j.ibiod.2019.05.013
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发表时间：
2019-08
影响因子：
4.8
通讯作者：
Jiang Wu;Quanli Liu;Bo Feng;Z. Kong;Bo Jiang;Y. Li
中科院分区：
文献类型：
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作者：
Jiang Wu;Quanli Liu;Bo Feng;Z. Kong;Bo Jiang;Y. Li
本研究旨在考察温度对厌氧处理富硫酸盐甲醇废水的总体有机物去除能力和产甲烷/硫化反应动力学特性的影响。实验室规模的上流式厌氧污泥床反应器在17.5~50 °C的温度范围内运行285d，处理含硫酸盐的甲醇废水，−/SO42COD/SO42COD0.5。实验结果表明，在17.5~25 °C范围内，产甲烷菌和硫化物的代谢活性都较低，在40~50 °C范围内，平均化学需氧量的去除效率都在90%以上。在本试验期间，有85%以上的进水化学需氧量被用于产甲烷，表明产甲烷菌对化学需氧量的利用占主导地位。相比之下，在40~50 °C的温度范围内，基于硫化的化学需氧量的利用受到了有效的限制。
This study aims at investigating that the temperature effects on the overall organics removal capability and the reaction kinetic properties of methanogenesis/sulfidogenesis in anaerobic treatment of sulfate-rich methanol wastewater. A lab-scale upflow anaerobic sludge blanket (UASB) reactor was operated for 285 days treating sulfate-rich methanol wastewater at a temperature range of 17.5–50 °C. The COD/SO42−ratio of synthetic wastewater is 0.5. Experimental results indicate that both methanogens and sulfidogens showed lower metabolic activities at 17.5–25 °C. The average chemical oxygen demand (COD) removal efficiencies were higher than 90% at 40–50 °C. During these experimental periods, larger than 85% of influent COD was confirmed to be utilized for methanogenesis, revealing that methanogens prevailed over sulfidogens and dominated significantly in the COD utilization. In contrast, the sulfidogenesis-based COD utilization was effectively limited under the temperature range of 40–50 °C.