Biogas Production from Cow Manure in an Experimental 20 m³ Reactor with a Jet Mixing System

Abstract:

Biogas was generated from cow manure in a experimental 20 m³ reactor with a jet mixing system at a temperature of 35°C. The initial concentration of TS was 5%. Several parameters was investigated to elucidate the variation law of some critical indicators in the experimental biogas systems in batch fermentation process, such as biogas production rate, biogas composition, pH, COD and VFAs concentration. It was found that the biogas production was above 0.3 m³/ kg TS under mesophilic temperature conditions, and the total biogas produced was 108 m³. The methane content in biogas was around 60% after 6 days of fermentation.COD decreased from 26,800mg/L to less than 10,000mg/L, of which 72% was converted to biogas. The concentration of VFAs decreased from 2.27g/L to around 0.8g/L, and value of the pH was stabilized between 7.36 and 7.53 after the 9th day. This anaerobic digestion system had many advantages over other conventional systems,such as stability operation, energy-saving and high substrate utilization rate, which means its application in biogas production is feasible.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 3290-3294
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.3290
• Online since: May 2012
• Authors: Zhi Zhong Ren, Ping Ning, Li Juan Jia, Guang Fei Qu, Xiang Feng Xiong, Hui Feng, Cheng Zhou
• Keywords: Anaerobic Digestion, Batch Fermentation Process, Biogas, Cow Manure, Jet Mixing System

References

[1] C.F. Yang, "Investigation and pollution prevention in livestock and poultry of scale in China,"China Environment Science Press. Beijing,(2002)

[2] X.H. Chen, Y.Z. Wang, "Idea of environmental protection and treatment of livestock and poultry manure," Shanghai Journal of Animal Husbandry and Veterinary Medicine, vol.5,2009,pp.59-61(In Chinese)

[3] H. B. Møller, S. G. Somm, B. K. Ahring:Biomass and Bioenergy, vol.26,2004,pp.485-495

[4] P.D. Zhang, X.R. Li, L.Yang Y.H. Zheng L.S. Wang, "Greenhouse gas mitigation benefits of large and middle-scale biogas project in China," Transactions of the Chinese Society of Agricultural Engineering, vol.24,2008, pp.39-243(In Chinese)

[5] Bjornsson L, Mattiasson B, Henrysson T: Appl Microbiol Biotechnol 1997;47:640–4.

[6] Gujer W, Zehnder AJB:Water Sci Technol 1983;15:127–67.

[7] Powell GE, Archer DB:Biotechnol Bioeng 1989;33:570–7.

[8] Jenkins SR, Morgan JM, Zhang X: Res J Water Pollut Control Fed 1991;63: 28–34.

[9] Bjornsson L, Murto M, Jantsch TG, Mattiasson B: Water Res 2001;35:2833–40.

[10] N.Q. Ren, A.J. Wang, "Theory and application of anaerobic biotechnology," Chemical Industry Press. Beijing,2004:315-317(In Chinese)

[11] M.C. Wu, K.W. Sun, R.Y. Li,Y.Sun H.D. Zhang, "Study on Performance of Anaerobic Digestion for Treating Municipal Solid Waste at Different Temperature," Chemistry & Bioengineering,vol.9, 2005, pp.28-30(In Chinese)

[12] H. M. El-Mashad, G. Zeeman, W. K. P. Loon, G. P. A. Bot, G. Lettinga: Bioresource Technology, vol.95,2004,pp.191-201