Methane production from napier grass by two-stage anaerobic digestion Online publication date: Fri, 14-Oct-2016
by Nusara Sinbuathong; Yuwadee Sangsil; Suchat Leungprasert; Suriya Sawanon
International Journal of Global Warming (IJGW), Vol. 10, No. 4, 2016
Abstract: Digestion of Napier grass was investigated in two-stage anaerobic reactors. The reactor volume was 4 and 5 litres for the acidogenic and methanogenic reactors, respectively. The acidogenic reactors were fed once daily at 100, 150, 200, 250, and 300 mL/day with a slurry of Napier grass. The organic loading rates (OLRs) were 0.60, 0.90, 1.20, 1.50 and 1.80 kg chemical oxygen demand (COD)/m3.day. Mixed ruminal microorganisms from cows were used as the inoculum. The pH was adjusted to 7.5 for all methanogenic reactors at the start-up period. The reactors were operated at 30°C. The maximum methane (CH4) yield was observed at an OLR of 1.20 kg COD/m3.day. The average pH in the acidogenic and methanogenic reactors was 5.3 and 7.4, respectively. At the maximum CH4 yield OLR, the CH4 production was 148 litres at STP/kg dry Napier grass added to the reactor, which indicated that 6.76 kg of dry Napier grass is needed to produce 1 m3 of pure CH4.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Global Warming (IJGW):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook