State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Bioresour Technol. 2017 Nov;243:914-921. doi: 10.1016/j.biortech.2017.07.036. Epub 2017 Jul 8.
The biogas generated from anaerobic digestion (AD) also includes undesirable by-product such as hydrogen sulfide (HS), which must be removed before the biogas can be used as a clean energy source. Therefore, it is necessary to find an appropriate strategy to simultaneously enhance the methane yield and reduce HS production. An efficient strategy-pretreating sludge at pH 10 for 8d and adjusting the system at neutral pH to produce methane for 20d-is reported for the synchronous enhancement of methane production and reduction of HS production during AD. The experimental results showed that the cumulative methane yield was 861.2±6.1mL/g volatile solids (VS) of sludge pretreated at pH 10 in semi-continuous stirred anaerobic reactors for 84d, an increase of 49.6% over the yield in the control. Meanwhile, the cumulative production of HS was 144.1×10mL/g VS, 54.2% lower than that in the control.
厌氧消化（AD）产生的沼气还包括不受欢迎的副产品，如硫化氢（HS），在沼气可用作清洁能源之前，必须将其去除。因此，有必要找到一种合适的策略来同时提高甲烷产量和减少 HS 的产生。据报道，一种有效的策略是在 pH 值为 10 下预处理污泥 8 天，然后在中性 pH 值下调节系统以产生甲烷 20 天，从而在 AD 过程中同步提高甲烷产量和减少 HS 产量。实验结果表明，在半连续搅拌厌氧反应器中用 pH 值为 10 的污泥预处理 84 天，累计甲烷产量为 861.2±6.1mL/g 挥发性固体（VS），比对照提高了 49.6%。同时，HS 的累计产量为 144.1×10mL/g VS，比对照降低了 54.2%。
