Kinetics of psychrophilic anaerobic sequencing batch reactor treating flushed dairy manure

• Published in: Bioresource technology 2013-03, Vol.131, p.6-12
• Main Authors: Ma, Jingwei, Yu, Liang, Frear, Craig, Zhao, Quanbao, Li, Xiujin, Chen, Shulin
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; Anaerobic digestion; Anaerobic treatment; Animal productions; ASBR; Bacteria, Anaerobic - physiology; Batch Cell Culture Techniques - instrumentation; Biodegradation, Environmental; biofilm; Biological and medical sciences; Biological treatment of sewage sludges and wastes; biomass; Bioreactors; Bioreactors - microbiology; Biotechnology; Computer Simulation; Computer-Aided Design; Dairy manure; Dairy Products - microbiology; Dairying - instrumentation; Environment and pollution; Equipment Design; Equipment Failure Analysis; Fibers; Fundamental and applied biological sciences. Psychology; General agronomy. Plant production; growth models; Industrial applications and implications. Economical aspects; Kinetics; Manure; Manure - microbiology; Methane; methane production; Methods. Procedures. Technologies; microbial growth; Microorganisms; Models, Biological; process control; Psychrophilic; Reaction kinetics; Reactors; Refuse Disposal - instrumentation; Sequencing; temperature; Terrestrial animal productions; Use of agricultural and forest wastes. Biomass use, bioconversion; Various methods and equipments; Vertebrates
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2012.11.147

► A new biomass retention strategy for solids containing influent was presented. ► Influent solids were used as natural biofilm support media for high rate digestion. ► The technology showed a good performance despite short HRT and low temperature. ► There is free of clogging hazard in biofilm support media caused by manure fiber. ► Four microbial growth kinetic models were compared for biofilm kinetics study. In this study, a new strategy, improving biomass retention with fiber material present within the dairy manure as biofilm carriers, was evaluated for treating flushed dairy manure in a psychrophilic anaerobic sequencing batch reactor (ASBR). A kinetic study was carried out for process control and design by comparing four microbial growth kinetic models, i.e. first order, Grau, Monod and Chen and Hashimoto models. A volumetric methane production rate of 0.24L/L/d of and a specific methane productivity of 0.19L/gVSloaded were achieved at 6days HRT. It was proved that an ASBR using manure fiber as support media not only improved methane production but also reduced the necessary HRT and temperature to achieve a similar treating efficiency compared with current technologies. The kinetic model can be used for design and optimization of the process.