Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
Microwave assisted low-temperature hydrothermal treatment of solid anaerobic digestate for optimising hydrochar and energy recovery | |
Deng, Chen1,2; Kang, Xihui1,2,3,4; Lin, Richen1,2; Murphy, Jerry D.1,2 | |
2020-09-01 | |
发表期刊 | CHEMICAL ENGINEERING JOURNAL |
ISSN | 1385-8947 |
卷号 | 395页码:13 |
通讯作者 | Lin, Richen(richen.lin@ucc.ie) |
摘要 | With the growth of anaerobic digestion (AD) for biogas production, associated increasing digestate production may cause environmental problems if the increasing agricultural land required for digestate application is limited. An alternative is to valorise the digestate. Microwave assisted low-temperature hydrothermal treatment (MLHT; temperature 100 - 180 degrees C) was investigated as a post-treatment for AD of grass silage under two scenarios: 1) AD + MLHT and 2) Acid pre-treatment + AD + MLHT. Compared to the original grass silage, the digestates investigated required lower temperatures for carbonization in MLHT owing to their lower cellulose content. The higher MLHT temperatures (160 - 180 degrees C) led to significant increases in heating value and greater reductions in atomic ratios of O/C and H/C of hydrochar due to dehydration and decarboxylation reactions. As a result, higher temperatures contributed to higher sugar recovery, higher solid solubilization, and better quality of hydrochar. Under the MLHT at 180 degrees C, the hydrochar produced from digested grass silage in scenario 1 (AD + MLHT) exhibited a mass yield of 0.79 g/g total solid, a carbon content of 63.6% and an ash-free heating value of 27.6 kJ/g volatile solid; the biomethane potential from the process liquor was estimated as 68.7 ml CH4/g total solid. Scenario 1 is preferred over scenario 2 (acid pre-treatment + AD + MLHT) as it gave a higher yield and higher heating value of hydrochar. This study suggests that MLHT is a promising method to 1) produce hydrochar with an energy value comparable to lignite coal, and 2) recover additional biomethane through process liquor recycling. |
关键词 | Microwave assisted hydrothermal treatment Hydrochar Anaerobic digestion Digestate post-treatment |
DOI | 10.1016/j.cej.2020.124999 |
关键词[WOS] | RESOLUTION MASS-SPECTROMETRY ; PHYSICOCHEMICAL PROPERTIES ; CARBON MATERIALS ; ORGANIC-MATTER ; PRODUCT YIELDS ; SEWAGE-SLUDGE ; BIOGAS PLANTS ; CARBONIZATION ; PRETREATMENT ; BIOCHAR |
收录类别 | SCI |
语种 | 英语 |
资助项目 | Science Foundation Ireland (SFI) through the MaREI Centre for Energy, Climate and Marine[12/RC/2302_P2] ; Science Foundation Ireland (SFI) through the MaREI Centre for Energy, Climate and Marine[16/SP/3829] ; European Regional Development Fund under the Interreg NWE Project BIOWILL[NWE 964] ; European Union's Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie grant[797259] ; Environmental Protection Agency -Ireland[2018-REMS-13] ; Gas Networks Ireland through the Gas Innovation Group |
WOS研究方向 | Engineering |
项目资助者 | Science Foundation Ireland (SFI) through the MaREI Centre for Energy, Climate and Marine ; European Regional Development Fund under the Interreg NWE Project BIOWILL ; European Union's Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie grant ; Environmental Protection Agency -Ireland ; Gas Networks Ireland through the Gas Innovation Group |
WOS类目 | Engineering, Environmental ; Engineering, Chemical |
WOS记录号 | WOS:000537396600008 |
出版者 | ELSEVIER SCIENCE SA |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.giec.ac.cn/handle/344007/27209 |
专题 | 中国科学院广州能源研究所 |
通讯作者 | Lin, Richen |
作者单位 | 1.Univ Coll Cork, Environm Res Inst, MaREI Ctr, Cork, Ireland 2.Univ Coll Cork, Sch Engn, Cork, Ireland 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Deng, Chen,Kang, Xihui,Lin, Richen,et al. Microwave assisted low-temperature hydrothermal treatment of solid anaerobic digestate for optimising hydrochar and energy recovery[J]. CHEMICAL ENGINEERING JOURNAL,2020,395:13. |
APA | Deng, Chen,Kang, Xihui,Lin, Richen,&Murphy, Jerry D..(2020).Microwave assisted low-temperature hydrothermal treatment of solid anaerobic digestate for optimising hydrochar and energy recovery.CHEMICAL ENGINEERING JOURNAL,395,13. |
MLA | Deng, Chen,et al."Microwave assisted low-temperature hydrothermal treatment of solid anaerobic digestate for optimising hydrochar and energy recovery".CHEMICAL ENGINEERING JOURNAL 395(2020):13. |
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