title: Effects of thermal treatment on high solid anaerobic digestion of swine manure: Enhancement assessment and kinetic analysis.
abstract: Anaerobic digestion (AD), which is a process for generating biogas, can be applied to the treatment of organic wastes. Owing to its smaller footprint, lower energy consumption, and less digestate, high solid anaerobic digestion (HSAD) has attracted increasing attention. However, its biogas production is poor. In order to improve biogas production and decrease energy consumption, an improved thermal treatment process was proposed. Raw swine manure (>20% solid content) without any dilution was thermally treated at 70±1°C for different retention times, and then its effect on HSAD was investigated via batch AD experiments at 8.9% solid content. Results showed that the main organic components of swine manure hydrolyzed significantly during the thermal treatment, and HSAD's methane production rate was improved by up to 39.5%. Analysis using two kinetic models confirmed that the treatment could increase biodegradable organics (especially the readily biodegradable organics) in swine manure rather than upgrading its hydrolysis rate. It is worth noting that the superimposed first-order kinetics model was firstly applied in AD, and was a good tool to reveal the AD kinetics mechanism of substrates with complex components.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: wu_jing@mail.tsinghua.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Wu
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Yu-Ying
authors.initials: YY
authors.lastname: Hu
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Shi-Feng
authors.initials: SF
authors.lastname: Wang
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Zhi-Ping
authors.initials: ZP
authors.lastname: Cao
authors.affiliation: Laboratory of Reactions and Process Engineering, Université de Lorraine, CNRS, 1, rue Grandville, BP 20451, 54001 Nancy Cedex, France.
authors.forename: Huai-Zhi
authors.initials: HZ
authors.lastname: Li
authors.affiliation: Southwest University of Science and Technology, Mianyang 621010, China.
authors.forename: Xin-Mei
authors.initials: XM
authors.lastname: Fu
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Kai-Jun
authors.initials: KJ
authors.lastname: Wang
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.
authors.forename: Jian-E
authors.initials: JE
authors.lastname: Zuo
mesh_terms: D000693:Anaerobiosis; D006358:Hot Temperature; D006868:Hydrolysis; D007700:Kinetics; D008372:Manure; D008962:Models, Theoretical; D012037:Refuse Disposal / Q000379:methods*
chemical_list: D008372:Manure
keywords: High solid anaerobic digestion; Kinetic model; Methane production rate; Swine manure; Thermal treatment