文献类型：期刊文献

英文题名：Enhanced dry anaerobic digestion of swine excreta after organic nitrogen being recovered as soluble proteins and amino acids using hydrothermal technology

作者：Huang, Weiwei[1,2];Zhao, Ziwen[1];Yuan, Tian[1];Yu, Yang[1];Huang, Wenli[3];Lei, Zhongfang[1];Zhang, Zhenya[1]

机构：[1]Univ Tsukuba, Grad Sch Life & Environm Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058572, Japan;[2]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Nankai Univ, MOE Key Lab Pollut Proc & Environm Criteria, Coll Environm Sci & Engn, 94 Weijin Rd, Tianjin 300071, Peoples R China

年份：2018

卷号：108

起止页码：120

外文期刊名：BIOMASS & BIOENERGY

收录：;EI(收录号：20174704422369);WOS:【SCI-EXPANDED(收录号:WOS:000418858800013)】；

基金：This work was financially supported by JSPS KAKENHI Grant Numbers JP15K00599 and JP15K12235.

语种：英文

外文关键词：Dry anaerobic digestion; Swine excreta; Hydrothermal technology; Soluble proteins; Amino acids

摘要：This study investigated the feasibility of N recovery from swine excreta (SE) as value-added soluble proteins and amino acids using hydrothermal (HT) technology for improving dry anaerobic digestion (AD) performance. The effect of temperature on characteristics and transformation behaviors of N species in SE subjected to HT pretreatment at different temperatures (110-210 degrees C for holding 30 min) was investigated. After HT pretreatment at 150 degrees C, 58% of the total nitrogen (TN) content in SE became soluble, with 19.03%, 1.55% and 0.56% of TN being converted into soluble proteins, amino acids and urea, respectively. Temperatures higher than 170 degrees C favored the breakdown of these proteinaceous compounds, leading to accelerated formation of ammonia. After soluble proteins and amino acids being separated by water extraction, CH4 yield (322.13 cm(3) g(-1) of VSfed) from the solid residue pretreated at 150 degrees C was improved by 51% in comparison to that from raw excreta (213.70 cm(3) g(-1) of VSfed), achieving 3 days' shorter in effective CH4 production period. HT technology could be an effective pretreatment alternative for the recovery of soluble proteins and amino acids and subsequently enhanced dry AD of SE.