INTERNATIONAL JOURNAL FOR RESEARCH & DEVELOPMENT IN TECHNOLOGY Volume-11,Issue-4(Apr-19) ISSN (O) :- 2349-3585 All rights reserved by www.ijrdt.org 454 The Potential of Biogas from Apple Juice __________________________________________________________________________________________ Udara S. P. R. Arachchige 1 , Kohilan Rasenthiran 2 , Lakshan M.A.L 3 , LakshithaMadalagama M. K 4 , PrabhathPathirana P.R 5 , SakunaSandupama P.W 6 Faculty of Technology, University of Sri Jayewardenepura, Sri Lanka Abstract – This study examines the biogas and energy generation potential from apple juice, optimum factors and inhibitors for the biogas generation process. Instead of apple waste apple juice used for the experiment by assuming apple juice and apple waste compositions are approximately equal. In this report consider about biogas generation amount, flow rate, other factors are affecting the biogas generation, and energy derives from biogas. Moreover, simulated the biogas potential, flow rate, pH & VFA etc.Then compared experimental results with simulated data. Small syringes used as reactors and gas holder. In this experiment considered the effect of the biogas potential with mixing effects and without mixing. According to the yield calculation data, identified 5% is given the maximum yield. According to the 5% sample simulated data, identify the optimum conditions and used simulated results to calculate the energy potential from biogas. pH, VFA, organic load are the main important factors affect to the biogas production. pH should be around 7 for better gas production.The temperature at 35 ± 1.0฀ C was kept for better gas production. UASB is the best reactor for biogas generation because of the smallest volume. Average gas production from apple waste is 35ml/1 ml feed and CH4 production is approximately 60% of the total gas production. Finally calculated the energy potential from methane as 417.7kWh. I. INTRODUCTION High energy demand directly linking to the prices of fossil fuel and environmental pollution. Developed and industrialized countries most concerned about clean energy technologies, while the developing countries still prioritizing fossil fuel based energy generation for manufacturing and energy infrastructure. However the evolution of low carbon energy systems and advanced energy technologies needed to meet the sustainability goals at the first level of priority [1]. Global warming resulted from the fossil fuel based industrial emissions of greenhouse gases; especially carbon dioxide has received widespread attention with the concentration of CO2 in the atmosphere reaches 400 ppmv[2]. Therefore, the fast moving of sustainable energy generation is in high priority to maintain a better environment. The biogas generation from wastes, residuals, and energy crops will play a vital role in future. Biogas is versatile renewable energy which can be used to replace fossil fuels in gas-fired power plants, and heat generation sector as well as in the transportation sector. The anaerobic digestion process of biogas generation offers significant advantages over other forms of bioenergy production. It has been identified as one of the most energy- efficient and environmentally beneficial technology for bioenergy production [3]. Anaerobic digestion process can be defined as organic substrates are degraded in the absence of oxygen due to enzymatic and bacterial activities. The fermentation process produces biogas that can be used as a fuel source for cooking purposes and energy generation sector. The sludge generated by the fermenting process can be used as an organic fertilizer in agriculture [4]. The main aim of the present study is to quantify the biogas production from apple juice. The waste from fruit and vegetable processing industries has been used for the production of biogas by the anaerobic digestion process. During this process, the complex polymers are first hydrolyzed enzymatically into simpler substances and then the resulting matter is converted to Volatile Fatty Acids (VFA’s) by acidogenic bacteria. These VFA’s are further converted to acetates by acetogenic organisms. At the final stage, methanogenic organisms will utilize acetates and produce biogas (Fig. 1). This study examines the energy generation potential from biogas derived from apple juice. This experiment was done to find the optimum conditions for biogas generation such as substrate to inoculums ratio, pH etc. It is also wanted to find the optimum gas production using apple waste as a raw material. In the end, calculated the