http://www.iaeme.com/IJARET/index.asp 1656 editor@iaeme.com International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 11, Issue 11, November 2020, pp. 1656-1662, Article ID: IJARET_11_11_155 Available online at http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=11 ISSN Print: 0976-6480 and ISSN Online: 0976-6499 DOI: 10.34218/IJARET.11.11.2020.155 © IAEME Publication Scopus Indexed EFFECT OF CARBON TO NITROGEN RATIO ON MIXTURE OF COW AND CHICKEN MANURE ON THERMOPHILIC FERMENTATION IN PRODUCING BIOGAS Hendry S. Tira*, Yesung A. Padang, Salman, I M. Pariastika Department of Mechanical Engineering, Engineering Faculty Mataram University, Jl. Majapahit no. 62, Mataram, NTB, 83125 Indonesia *Corresponding Author ABSTRACT Biogas is an alternative energy in the form of methane (CH 4 ) which can be used as a fuel. It is formed from the decomposition of organic material through an anaerobic fermentation process carried out by anaerobic bacteria. Temperature is one of the important factors that influence the fermentation process. This study aims to determine the effectiveness of the C/N ratio in producing biogas under thermophilic conditions (55ºC) with variations in the ratio of C/N. Meanwhile, the C/N ratio used was 30, 35, 40, and the substrate without a change in the C/N ratio, respectively. This study uses glucose and ammonium sulfate to regulates the C/N ratio, where glucose has a function to increase carbon while ammonium sulfate is used to increase nitrogen. The results of this study conducted for 30 days revealed that the substrate with C/N ratio 35 and 40 with the addition of glucose has the highest biogas production volume. Production of biogas volume for C/N 30 substrate ratio has the lowest yield. The production of biogas in a thermophilic process has been shown to produce a higher volume of biogas than the mesophilic process with the same C/N ratio. Keywords: Biogas, C/N ratio, biogas volume, cow and chicken manure. Cite this Article: Hendry S. Tira, Yesung A. Padang, Salman and I M. Pariastika, Effect of Carbon to Nitrogen Ratio on Mixture of Cow and Chicken Manure on Thermophilic Fermentation in Producing Biogas, International Journal of Advanced Research in Engineering and Technology, 11(11), 2020, pp. 1656-1662. http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=11 1. INTRODUCTION Energy needs will increase as the population in an area increases. At the same time the current energy crisis faced by several countries has led to an effort to develop alternative energy sources to support the availability of existing energy sources.