Pre-treatment of Food Waste Input for Sustainable Biogas Production in Anaerobic Digester
Authors: Dzulkhairi T. Mustaffa1*, Nasehir K. Yahaya1, Muhammad Azroie M. Yusoff1, Faeiza Buyong2, Muhd Shahril N. Ismail1
1Water Quality Laboratory , National Hydraulic Research Institute of Malaysia (NAHRIM), Lot 5377, Jalan Putra Permai, 43300 Seri Kembangan, Selangor, Malaysia.
2School of Chemistry & Environment , Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia.
Corresponding author: Dzulkhairi T. Mustaffa
Anaerobic digestion (AD) tank requires a proper condition to function and this includes daily loading of food waste. In this research, loading of food waste is studied for optimum condition of anaerobic digester in Malaysia. The optimum condition monitored in this research is the pH of anaerobic digester tank which is in between pH of 6 to 8. Two methods of food waste pre-treatment which is thermal treatment chemical treatment are used for input for a 1 litre anaerobic digester tank. The condition of the tank is controlled with constant heat of 40 °C for mesophillic condition with constant stirring. 1 liter AD tank can only digest 6 g of thermally treated food waste and sustain a pH level at 6.8 to 7 whereby for chemically treated food waste, 1 liter of AD tank can digest 16g.
Keywords: anaerobic digestion, food waste pretreatment, biogas, organic waste