Open AccessA review of food waste characterization and treatment in anaerobic digestion
Author(s) -
Tengku Nuraiti Tengku Izhar,
Irnis Azura Zakarya,
Siti Khadijah Zaaba,
Ahmad Hadwan Mohd Yusof,
Najwa Mohd Shahril
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/646/1/012004
Subject(s) - food waste , biogas , anaerobic digestion , waste management , biodegradable waste , environmental science , renewable energy , biodegradation , waste treatment , thermal hydrolysis , nutrient , biogas production , biofuel , digestion (alchemy) , bioenergy , energy balance , sewage treatment , methane , chemistry , sewage sludge treatment , engineering , biology , ecology , organic chemistry , chromatography
Anaerobic digestion is one of the main biological techniques to convert organic waste to energy. The resulting biogas can be harvested as renewable energy and as a nutrient rich compound that can be converted to soil conditioner. Food waste varies seasonally and geographically. It is resulting in a multiple potential for biogas between different studies. This article studies the anaerobic digestion of food waste in two sections, which are food waste characteristics and mono digestion of food waste. The purpose of this review is to connect the features of food waste to the biogas potential and to propose improved method to increase biogas production. It was concluded that, in terms of physical and biochemical properties, the variation in food waste characteristics would affect the efficiency of the process, including nutrient balance, mechanical treatment, thermal treatment and two-stage configuration. Thermal treatment can increase biogas production but unnecessary treatment can decrease the biodegradability of food waste.