Comparison of Process Stability in Methane Generation from Palm Oil Mill Effluent using Dairy Manure as Inoculum

• Main Authors: Krishnan, Santhana, Singh, Lakhveer, Puranjan, Mishra, Mohd, Nasrullah, Mimi Sakinah, A. M., Thakur, Sveta, Siddique, Md. Nurul Islam, Zularisam, A. W.
• Format: Article
• Language: English
• Published: Elsevier 2017
• Subjects: TD Environmental technology. Sanitary engineering
• Online Access: http://umpir.ump.edu.my/id/eprint/18759/8/ftech-2017-lakhveer-Comparison%20of%20processstability%20in%20methane1.pdf; http://umpir.ump.edu.my/id/eprint/18759/; https://doi.org/10.1016/j.eti.2017.08.005

The potential of methane production in a continuously stirred tank reactor (CSTR) was investigated using dairy manure as inoculum at pH 6.8 and 37 °C temperature in this study. Two identical anaerobic bioreactors namely CSTR1 and CSTR2 filled with palm oil mill effluent (POME) as a carbon source were used. CSTR1 was not added with the inoculum, while CSTR2 was added with dairy manure as inoculum. Both the reactors were allowed to run for 5 days (d) in batch condition at hydraulic retention time (HRT) 10 d. The CSTR2produced 0.85 L/d gas yield and 59% methane content compared to 0.39 L/d gas yield and 20% produced in CSTR1, respectively. A better chemical oxygen demand (COD) reduction percentage of 48% was found in CSTR2 compared to CSTR1 with 33%. The investigation showed that dairy manure as inoculum has a marked influence on the start-up period and the biogas production rate.