Anaerobic digestion of biogas production from the commercial food waste source and cow dung inoculum

Yip, Siew Ling (2021) Anaerobic digestion of biogas production from the commercial food waste source and cow dung inoculum. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Anaerobic digestion is feasible technology with highest potential to convert food waste into renewable energy. Therefore, many researchers have investigated anaerobic digestion approach in their studies for enhancing biogas production. Furthermore, research utilizing specific types of food waste sources for biogas production, to produce relevant amount of biohydrogen yield are still at scarce. Hence, this research has carried out to detect biohydrogen gas production by focusing on specific type of food waste source. Later, the chemical composition of selected food waste source was analysed by using Fourier transform infrared (FTIR) analysis. Through FTIR analysis, it was found that the nature of chemical composition for substrate used for biohydrogen production was fully understood. The purpose of this study is to detect biohydrogen gases by using a Gas ChromatographyThermal Conductivity Detector (GC-TCD) analytical equipment. Therefore, the collected gases from chicken to rice waste ratios of (1:1), (1:2) and (2:1) were evaluated through GCTCD analysis testing. Through gas detection testing, it was found that the substrate ratio of 1:2 had promoted higher possibility of biohydrogen production. Up until now, most of the research has mainly focused on the factors of pH, C/N ratio and temperature on biohydrogen production. Nevertheless, there is still no similar study or research study about the substrate ratio between chicken waste leftover and rice waste leftover. Therefore, the correlation of substrate ratio between chicken waste leftover and rice waste leftover that has led into biogas production and even higher biohydrogen gas yield was further evaluated in this research. At the end of this study, the biogas mini-reactor was validated functioning and had potential in producing biohydrogen gases that has been successfully detected from the GC-TCD gas analysis test. This research was significantly important to be carried out as it provides another alternative for producing green biohydrogen alternative from food wastes resources which beneficial for sustainable and green environment.

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