Journal
RESOURCES CONSERVATION AND RECYCLING
Volume 181, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.resconrec.2022.106265
Keywords
Waste recycling; Pyrolysis; Co-digestion; Anaerobic digestion; Integrated waste management
Categories
Funding
- National Research Foundation (NRF), Prime Minister's Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) programme [R-706-001-102-281]
- National University of Singapore
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The potential of waste recovery strategies in reducing waste-related greenhouse gas emissions in Singapore was evaluated. The proposed strategies were found to be effective in reducing emissions from food, sewage, and plastic waste, with a significant reduction in greenhouse gas emissions compared to business-as-usual waste disposal methods.
The potential of implementing waste recovery strategies on three kinds of waste - food, sewage, and plastic - in reducing waste-related greenhouse gas emissions in Singapore was evaluated using life cycle assessment. It was found that the proposed strategies are capable of reducing 1,087.80 kgCO(2)-eq per tonne of plastic waste, 53.00 kgCO(2)-eq per tonne of food waste, and 43.86 kgCO(2)-eq for the combination of one tonne of sewage waste and one tonne of food waste. When uncertainties of the three waste streams were considered in sensitivity analysis and projections of waste quantities to 2025 were performed up to a 95% confidence level, it was found that the proposed strategies could reduce about 37.13% of the GHG emissions from the business-as-usual disposal waste technology (that is, incineration). This corresponds to an average reduction of 0.53 million tonnes CO2-eq per year, which is equivalent to the annual GHG emissions from electricity consumptions of 256,322 households in Singapore.
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