Enhancing the hydrolysis of saline waste sludge with thermophilic bacteria pretreatment: New insights through the evolution of extracellular polymeric substances and dissolved organic matters transformation 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Science of the Total Environment
年/卷/期
2019 / 670 /
页码
31-40
ISSN号
0048-9697
作者单位
Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China;Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China;Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China;Auburn Univ, Dept Biosyst Engn, Auburn, AL 36849 USA;Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China;Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China;Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Shandong, Peoples R China;
作者
Gao, Pengtao;Guo, Liang;Sun, Jian;Wang, Yi;She, Zonglian;Gao, Mengchun;Zhao, Yangguo;
摘要
Recently, the treatment and utilization of saline waste sludge has drawn growing attention because large amounts of saline waste sludge were generated with the increase of saline wastewater discharge. In this study, thermophilic bacteria (TB) pretreatment was applied to accelerate the hydrolysis of saline waste sludge and the efficiency of hydrolysis at different salinities was evaluated. Compared with the group without salinity, the releasing of carbohydrate (up to a 67.0% decrease) in extracellular polymeric substances (EPS) was inhibited at the salinity ranging from 1.0% to 2.5%, and the releasing of protein (up to a 17.6% decrease) was inhibited under salinity conditions. Excess salinity (4.0%) caused the cell lysis, and the content of soluble chemical oxygen demand (SCOD), soluble carbohydrate and protein in dissolved organic matter (DOM) increased by 44.9%, 38.8% and 20.8% than that obtained without salinity, respectively. According to the excitation-emission matrix (EEM) fluorescence spectroscopy, the biodegradability of sludge was improved at 2.0% salinity. At 2.0% salinity, the maximum fluorescence intensity of soluble microbial byproduct substances (76,358.9 (au)) and the minimum fluorescence intensity of humic acid-like substances (173,424 (au)) were obtained. The increased salinity was beneficial for the sludge stabilization and was disadvantageous for the sludge reduction. (C) 2019 Elsevier B.V. All rights reserved.
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
关键词/主题词
Salinity;Thermophilic bacteria (TB);Sludge hydrolysis;Sludge reduction;
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部