发酵罐内通入空气去除H2S同步提升产甲烷效率研究
摘要：摘要餐厨垃圾高温厌氧消化沼气中含有高浓度的H2S,在使用前需要将其去除。对连续运行了230 d的高温厌氧消化反应器进行研究,考察了不同有机负荷、通入空气量和沼气顶空循环对H2S去除效果的影响,并分析了向反应器顶空通入空气后厌氧消化性能的提升效果。实验发现,在水力停留时间15 d和沼气顶空停留时间2.8 h的条件下,恒流量连续通入3倍理论空气量可去除78%的H2S。进一步采用沼气顶空循环,H2S体积分数从平均0.2%下降至0.01%以下,去除率达到95%。在通入空气的工况下,餐厨垃圾高温厌氧消化的甲烷产率提高了8.5%,达到310 mL/g（以COD质量计）;沼气容积产气率提高了10.5%,达到4.2 L/(Ld)。乙酸和丙酸的浓度与对照反应器相比没有显著变化,均维持在较低浓度水平。总体而言,在反应器内脱除H2S的工艺方法操作简便,成本低廉,具有广阔的工程应用前景。
Abstract:：Thermophilic anaerobic digestion of food waste generates biogas with high concentrations of H2S, which needs to be removed before use. In a 230-day study, a thermophilic anaerobic digestion reactor was continuously operated. The study investigated the impact of varying organic loads, air injection flow, and biogas headspace recirculation on H2S removal. Additionally, the study analyzed the performance enhancement of anaerobic digestion after the introduction of air into the reactor headspace. The results obtained from this study found that 78% of the H2S could be removed by continuously injecting three times the theoretical air at a constant flow rate when the anaerobic reactor was operated under an HRT of 15 days and a biogas headspace residence time of 2.8 h. By recirculating the biogas to the headspace, the H2S content in biogas decreased from 0.2% to less than 0.01%, resulting in a 95% removal performance. Under the condition of air intake, the methane yield of thermophilic anaerobic digestion of food waste increased by 8.5% to 310 mL/g (measured by COD mass) and the volumetric biogas production reached 4.2 L/(Ld), which is an increase of 10.5% compared to the control one. Acetic and propionic acid concentrations remained low and did not show significant differences. Conclusively, removing the H2S from inside the digester is a simple and low-cost method and has the feasibility to be used on an industrial scale for food digestion.
中文标题：发酵罐内通入空气去除H2S同步提升产甲烷效率研究
英文标题：Removing H2S in the Digester and Simultaneously Increasing Methane Production by Injecting Air
发表时间：2023-12-06
作者：
姜彭午, 乔玮, 段利娟, 赵明曦, 侯旭峰, 董仁杰
作者简介：
姜彭午（1998-）,男,硕士研究生,主要从事沼气生物脱硫研究。乔 玮（1979-）,男,博士,教授,主要从事废水和废弃物厌氧生物处理研究。
关键词：餐厨垃圾,高温厌氧消化,沼气脱硫,通入空气,
Key words：food waste,thermophilic anaerobic digestion,biogas desulfurization,air injection,
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