分步添加灰分添加剂原位沼气升级：产甲烷菌适应和 CO2 捕集。
In-situ biogas upgrading by a stepwise addition of ash additives: Methanogen adaption and CO sequestration.
机构信息
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
出版信息
Bioresour Technol. 2019 Jun;282:1-8. doi: 10.1016/j.biortech.2019.02.110. Epub 2019 Feb 25.
Biogas from anaerobic digestion (AD) of waste activated sludge (WAS) limited its utilization due to low value-added. In this study, an innovative addition mode for ash known as stepwise addition was developed to enhance methane production and improve CO scavenge from AD of sludge. Experimental results confirmed stepwise addition of ash improved methane content to 79.4%, compared to control group (69.1%). Compared to Pulse addition and Control, the cumulative CH production was promoted by 39.2% and 35.4%, respectively. Investigation of the mechanism indicated that stepwise addition of ash could decrease hydrolytic and acidifying enzyme activities but increase activity of coenzyme F420, compared to pulse addition group. Furthermore, stepwise addition of ash not only increased the abundance of Methanomassiliicoccus (34.48%), but also promoted amounts of CO capture. This method ameliorate utilization availability of sludge ash for sludge anaerobic digestion through promoting cumulative methane production and increasing CO storage capacity.
由于附加值低，来自废物活性污泥（WAS）的厌氧消化（AD）的沼气限制了其利用。在本研究中，开发了一种称为分步添加的灰分的创新添加方式，以提高甲烷产量并改善污泥 AD 中 CO 的清除。实验结果证实，与对照组（69.1%）相比，灰分的分步添加将甲烷含量提高到 79.4%。与脉冲添加和对照组相比，分步添加分别将累积 CH 产量提高了 39.2%和 35.4%。对机理的研究表明，与脉冲添加组相比，分步添加灰分可以降低水解和产酸酶的活性，但可以增加辅酶 F420 的活性。此外，分步添加灰分不仅增加了 Methanomassiliicoccus（34.48%）的丰度，而且还促进了 CO 的捕获量。该方法通过促进累积甲烷产量和增加 CO 储存能力，改善了污泥厌氧消化中污泥灰分的利用效率。
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