Department of Chemical Engineering and Environmental Technology, Escuela de Ingenierías Industriales, Sede Dr. Mergelina, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain.
Bioresour Technol. 2014 Aug;166:151-7. doi: 10.1016/j.biortech.2014.05.058. Epub 2014 May 24.
In order to maximise the efficiency of biogas desulphurisation and reduce the oxygen cost during microaerobic digestion, it is essential to know how the process occurs. For this purpose, a reactor with a total volume of 266 L, treating 10 L/d of sewage sludge, was operated with 25.0 L and without headspace. Under anaerobic conditions, the H2S concentration in the biogas varied between 0.21 and 0.38%v/v. Next, O2 was supplied from the bottom of the reactor. At 0.25-0.30 NLO₂/Lfed, the biogas was entirely desulphurised, and its O₂ content remained below 1.03%v/v, when the digester had 25.0 L of gas space. However, with almost no headspace, the H2S content in the biogas fluctuated from 0.08 to 0.21%v/v, while the average O2 concentration was 1.66%v/v. The removed H2S accumulated in the outlet pipe of the biogas in the form of S(0) due to the insufficient headspace.
为了最大限度地提高沼气脱硫效率并降低微需氧消化过程中的氧气成本，了解该过程是至关重要的。为此，使用总容积为 266 L、处理 10 L/d 污水污泥的反应器，在无顶部空间的情况下，以 25.0 L 的体积运行。在厌氧条件下，沼气中的 H2S 浓度在 0.21%至 0.38%v/v 之间变化。接下来，从反应器底部供应 O2。当以 0.25-0.30 NLO₂/Lfed 的速率进料时，沼气完全脱硫，并且当其有 25.0 L 气体空间时，O₂含量保持在 1.03%v/v 以下。然而，由于几乎没有顶部空间，沼气中的 H2S 含量在 0.08%至 0.21%v/v 之间波动，而平均 O2 浓度为 1.66%v/v。由于顶部空间不足，去除的 H2S 以 S(0)的形式在沼气的出口管道中积累。
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