热解炭和水热炭对沼渣和猪粪协同消化的影响。
Impact of pyrochar and hydrochar derived from digestate on the co-digestion of sewage sludge and swine manure.
机构信息
School of Environment and Architecture, University of Shanghai for Science and Technology, 200093, China.
Institute of Bioresource and Agriculture and Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong; Department of Biology, Hong Kong Baptist University, Hong Kong Special Administrative Region.
出版信息
Bioresour Technol. 2020 Oct;314:123730. doi: 10.1016/j.biortech.2020.123730. Epub 2020 Jun 24.
Four kinds of biochar were obtained by pyrolysis carbonization and hydrothermal carbonization from swine manure digestate, i.e. pyrochar (HC, HC-Fe) and hydrochar (HTC, HTC-Fe). Batch fermentation was conducted to compare their effects on the co-digestion of sewage sludge and swine manure. Both pyrochar and hydrochar present positive effect on methane production, nevertheless the higher methane yields were obtained in HTC and HTC-Fe digesters. No advantage was observed for the iron impregnation. The maximum methane yield was 308.4 mL/g VS in HTC digester, which was 27% and 49% higher than HC and Control, respectively. The surface functional groups of hydrochar are more abundant than pyrochar, which is favorable for promoting the syntrophic anaerobic metabolism, as revealed by the promoted substrate hydrolysis and VFAs consumption rate. Thus, it is proposed to convert swine manure digestate to hydrochar, which can be recirculated back to the AD reactor to increase the digestion efficiency.
四种生物炭是通过热解碳化和水热碳化从猪粪消化物中得到的，即热解炭（HC、HC-Fe）和水热炭（HTC、HTC-Fe）。采用批式发酵法比较了它们对污水污泥和猪粪共消化的影响。热解炭和水热炭对甲烷生成均有积极影响，但 HTC 和 HTC-Fe 消化器中获得了更高的甲烷产量。铁浸渍没有优势。在 HTC 消化器中获得了最大的甲烷产量 308.4 mL/gVS，分别比 HC 和对照提高了 27%和 49%。水热炭的表面官能团比热解炭更丰富，这有利于促进共栖厌氧代谢，如促进基质水解和 VFAs 消耗速率所揭示的那样。因此，建议将猪粪消化物转化为水热炭，可以将其循环回 AD 反应器以提高消化效率。
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