Application of Combined Mixture Process Design for Enhancement of Methane Production Using Co-digestion of Chicken Manure and Napier Grass

JOURNAL OF MECHANICS OF CONTINUA AND MATHEMATICAL SCIENCES > Special Issue > Special Issue No. – 1, March, 2019 > Application of Combined Mixture Process Design for Enhancement of Methane Production Using Co-digestion of Chicken Manure and Napier Grass

March 25, 2019

Authors:

Supawadee Yodthongdee ,Panomchai Weerayutsil,Kulyakorn Khuanmar,

DOI NO:

https://doi.org/10.26782/jmcms.2019.03.00008

Keywords:

Biogas,Methane Gas,Co-Digestion ,Chicken Manure,Napier Pakchong ,Combined Mixture Process Design,

Abstract

This research is aimed at application of Combined Mixture Process Design by Design Expert program in order to enhance the efficiency of methane production by co-digestion of chicken manure and Napier Pakchong 1 grass (Pennisetum purpureum. Schum), which enables deduction of operation time and cost for methane production. In addition, the impact of co-digestion in terms of C/N ratio was studied. The experimental result indicated that the Combined Mixture Process Design by biogas and methane yield as response variables were significantly appropriate based on the R2 at 93.99% and 93.67%, respectively. It also indicated the factors that enhance the maximum production of methane, i.e., the ratio of inoculum: chicken manure: Napier grass of 59.70: 6.02: 34.28%TS at the total solids of 2.5% of the working volume, pH 8, and 46°C. Such optimum conditions could yield accumulated biogas and accumulated methane of 920.88 ml/gVS and 492 mlCH4/gVS or 73.19%. Comparing to the individual digestion and the co-digestion, it was found that methane production presented the higher methane yield from the co-digestion of chicken manure and Napier grass.

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