Comparison of primary and secondary sludge carbon sources derived from hydrolysis or acidogenesis for nitrate reduction and denitrification kinetics: Organics utilization and microbial community shift

被引：15

作者：

Guo, Yiding ^{[1
,2
]}

Guo, Liang ^{[2
,3
]}

Jin, Chunji ^{[2
]}

Zhao, Yangguo ^{[2
]}

Gao, Mengchun ^{[2
]}

Ji, Junyuan ^{[2
]}

She, Zonglian ^{[2
]}

Giesy, John P. ^{[4
,5
]}

机构：

[1] Tongji Univ, Coll Environm Sci & Engn, Shanghai 200092, Peoples R China

[2] Ocean Univ China, Coll Environm Sci & Engn, Qingdao 266100, Peoples R China

[3] Ocean Univ China, Key Lab Marine Environm & Ecol, Minist Educ, Qingdao 266100, Peoples R China

[4] Univ Saskatchewan, Toxicol Ctr, Dept Vet Biomed Sci, Saskatoon, SK, Canada

[5] Baylor Univ, Dept Environm Sci, Waco, TX USA

来源：

ENVIRONMENTAL RESEARCH | 2022年 / 212卷

基金：

中国国家自然科学基金;

关键词：

Denitrification kinetics; Proteins; Carbohydrates; Volatile fatty acids (VFAs); Microbial community; WASTE ACTIVATED-SLUDGE; ALKALINE FERMENTATION LIQUID; BACTERIAL COMMUNITY; WATER; SOLUBILIZATION; PHOSPHORUS; NITROGEN; REMOVAL; ENHANCE; REACTOR;

D O I：

10.1016/j.envres.2022.113403

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Seeking available and economical carbon sources for denitrification process is an intractable issue for wastewater treatment. However, no study compared different types of waste sludge as carbon source from denitrification mechanism, organics utilization and microbial community aspects. In this study, primary and secondary sludge were pretreated by thermophilic bacteria (TB), and its hydrolysis or acidogenic liquid were prepared as carbon sources for denitrification. At C/N of 8-3, the variations of NO3+-N and NO2+-N were profiled in typical cycles and denitrification kinetics was analyzed. Primary sludge achieved a competitive NOX-N removal efficiency with less dosage than secondary sludge. Fourier transform infrared (FTIR) spectroscopy was introduced to analyze organic composition from functional-group perspective and the utilization of organic matters in different sludge carbon sources was investigated. To further analyze the microbial community shift in different denitrification systems, high-throughput sequencing technology was applied. Results showed that denitrifier Thauera, belonging to Proteobacteria, was predominant, and primary sludge acidogenic liquid enriched Thauera most intensively with relative abundance of 47.3%.

引用

页数：10