Kinetics on anaerobic co-digestion of bagasse and digested cow manure with short hydraulic retention time

Darwin, Afrizal Fazil, Muhammad Ilham, Sarbaini and Satria Purwanto
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Afrizal Fazil: Department of Agricultural Engineering, Syiah Kuala University, Darussalam, Banda Aceh, Indonesia
Muhammad Ilham: Department of Agricultural Engineering, Syiah Kuala University, Darussalam, Banda Aceh, Indonesia
Sarbaini: Department of Agricultural Engineering, Syiah Kuala University, Darussalam, Banda Aceh, Indonesia
Satria Purwanto: Department of Agricultural Engineering, Syiah Kuala University, Darussalam, Banda Aceh, Indonesia

Research in Agricultural Engineering, 2017, vol. 63, issue 3, 121-127

Abstract: The anaerobic co-digestion of bagasse with digested cow manure was operated in 3 l semi-continuous reactor under mesophlic temperature at 34 ± 1°C. Short hydraulic retention time and high organic loading rate applied were 10 days and 3.465 kg volatile solids (VS)/m3.day, respectively. Anaerobic co-digestion of bagasse with digested cow manure obtained higher biogas yield (69 ml/g VS) compared with the anaerobic digestion of digested cow manure alone (20.42 ml/g.VS). Kinetic assessment revealed that the maximum specific growth rate, the maximum rate of substrate consumption, half-velocity constant, endogenous decay constant and microbial growth yield obtained were 3.917 day-1, 870.309 mg/mg, 15.09 mg/l , 8.1518 day-1 and 0.0193 mg/mg, respectively. This result indicated that a longer retention time was required to allow the bacterial growth.

Keywords: kinetic parameters; high organic loading rate; single stage anaerobic digestion (search for similar items in EconPapers)
Date: 2017
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DOI: 10.17221/18/2016-RAE

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