Improving methane production from wheat straw by digestate liquor recirculation in continuous stirred tank processes
文献类型：期刊论文
| 作者 | Peng, Xiaowei1,3; Nges, Ivo Achu1; Liu, Jing1,2 |
| 刊名 | RENEWABLE ENERGY
 |
| 出版日期 | 2016 |
| 卷号 | 85期号:JAN页码:12-18 |
| 关键词 | Anaerobic digestion Digestate Macronutrients Sewage sludge Wheat straw |
| ISSN号 | 0960-1481 |
| 英文摘要 | Wheat straw is an abundant, cheap substrate that can be used for methane production. However, the nutrient content in straw is inadequate for methane fermentation. In this study, recycling digestate liquor was implemented in single-stage continuous stirred tank processes for enrichment of the nutrient content of straw with the aim of improving the methane production. The VS-based organic loading rate was set at 2 g/(L d) and the solid retention time at 40 days. When wheat straw alone was used as the substrate, the methane yields achieved with digestate liquor recycling was on average 240 ml CH4/g VS giving a 21% improvement over the processes without recycling. However, over time, the processes suffered from declining methane yields and poor stability evidenced by low pH. To maintain process stability, wheat straw was co-digested with sewage sludge or supplemented with macronutrients (nitrogen and phosphorous). As a result, the processes with digestate liquor recycling could be operated stably, achieving methane yields ranging from 288 to 296 ml CH4/g VS. Besides, the processes could not be operated sturdily with supplementation of macronutrients without digestate liquor recycling. The highest methane yield (296 16 ml CH4/g VS) was achieved by co-digestion with sewage sludge plus recycling of digestate liquor after filtration (retention of nutrients and microorganisms). This was comparable to the maximum expected methane yield of 293 13 ml CH4/g VS achieved in batch test. The present study therefore demonstrated that digestate liquor recycling could lead to a decreased dilution of vital nutrients from the reactors thereby rendering high process performance and stability. (C) 2015 Elsevier Ltd. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Energy & Fuels |
| 研究领域[WOS] | Energy & Fuels |
| 关键词[WOS] | ANAEROBIC-DIGESTION ; BIOGAS PRODUCTION ; SWINE MANURE ; SUGARCANE BAGASSE ; STABLE OPERATION ; BEET SILAGE ; PRETREATMENT ; HYDROLYSATE ; BATCH ; REQUIREMENTS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000363344800002 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/19737]  |
| 专题 | 过程工程研究所_生化工程国家重点实验室 |
| 作者单位 | 1.Lund Univ, Dept Biotechnol, SE-22100 Lund, Sweden 2.Bioproc Control AB, SE-22363 Lund, Sweden 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Xiaowei,Nges, Ivo Achu,Liu, Jing. Improving methane production from wheat straw by digestate liquor recirculation in continuous stirred tank processes[J]. RENEWABLE ENERGY,2016,85(JAN):12-18. |
| APA | Peng, Xiaowei,Nges, Ivo Achu,&Liu, Jing.(2016).Improving methane production from wheat straw by digestate liquor recirculation in continuous stirred tank processes.RENEWABLE ENERGY,85(JAN),12-18. |
| MLA | Peng, Xiaowei,et al."Improving methane production from wheat straw by digestate liquor recirculation in continuous stirred tank processes".RENEWABLE ENERGY 85.JAN(2016):12-18. |
入库方式： OAI收割
来源：过程工程研究所
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