title: Thermal analysis and 454 pyrosequencing to evaluate the performance and mechanisms for deep stabilization and reduction of high-solid anaerobically digested sludge using biodrying process.
abstract: Biodrying was firstly used for post-treatment of anaerobically digested sludge (ADS) with wheat residues (WR) as bulking agents to improve its quality and reduce its amount. After 18days of biodrying, water was removed at a rate of 664.4gkg(-1) initial water at the typical ratio of ADS/WR. A separate aerobic incubation test showed that 8.11-14.84% of volatile solid (VS) was degraded in the ADS. The degradation of C- and H-containing materials (e.g., carboxylic acid) accounted for oxygen consumption and VS loss. The WR also showed strong biodegradability, and contributed approximately 86.01% of biogenerated heat during the process. Thermal balance analysis showed that the produced heat was primarily consumed through water evaporation and conductive transfer. 454 pyrosequencing implied the obvious succession from the anaerobic to aerobic microorganisms during the process. Some dominant Firmicutes, such as Clostridium and Bacillales, seemed to relate with organic matter degradation of the substrates.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China. Electronic address: lixiaowei419@163.com.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China. Electronic address: daixiaohu@tongji.edu.cn.
authors.forename: Xiaohu
authors.initials: X
authors.lastname: Dai
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
authors.forename: Shijie
authors.initials: S
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Jin
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D006358:Hot Temperature; D010101:Oxygen Consumption; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000032:analysis / Q000737:chemistry*; D013816:Thermodynamics; D014867:Water
chemical_list: D012722:Sewage; D014867:Water
keywords: Biodrying; Deep stabilization; High-solid anaerobically digested sludge; Microbial community succession; Thermal balance