title: Comparison of the co-gasification of sewage sludge and food wastes and cost-benefit analysis of gasification- and incineration-based waste treatment schemes.
abstract: The compositions of food wastes and their co-gasification producer gas were compared with the existing data of sewage sludge. Results showed that food wastes are more favorable than sewage sludge for co-gasification based on residue generation and energy output. Two decentralized gasification-based schemes were proposed to dispose of the sewage sludge and food wastes in Singapore. Monte Carlo simulation-based cost-benefit analysis was conducted to compare the proposed schemes with the existing incineration-based scheme. It was found that the gasification-based schemes are financially superior to the incineration-based scheme based on the data of net present value (NPV), benefit-cost ratio (BCR), and internal rate of return (IRR). Sensitivity analysis was conducted to suggest effective measures to improve the economics of the schemes.
authors.affiliation: NUS Environmental Research Institute, National University of Singapore, 1 Create Way, Create Tower, #15-02, Singapore 138602, Singapore.
authors.forename: Siming
authors.initials: S
authors.lastname: You
authors.affiliation: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.affiliation: School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
authors.forename: Yanjun
authors.initials: Y
authors.lastname: Dai
authors.affiliation: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore.
authors.forename: Yen Wah
authors.initials: YW
authors.lastname: Tong
authors.affiliation: Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117585, Singapore. Electronic address: chewch@nus.edu.sg.
authors.forename: Chi-Hwa
authors.initials: CH
authors.lastname: Wang
mesh_terms: D003247:Conservation of Natural Resources / Q000191:economics / Q000379:methods; D003362:Cost-Benefit Analysis; D005502:Food; D005740:Gases / Q000737:chemistry*; D006801:Humans; D017745:Incineration / Q000191:economics / Q000379:methods; D009010:Monte Carlo Method; D012722:Sewage / Q000737:chemistry*; D012846:Singapore; D018505:Waste Management / Q000191:economics / Q000379:methods; D014866:Waste Products
chemical_list: D005740:Gases; D012722:Sewage; D014866:Waste Products
keywords: Cost-benefit analysis; Food waste; Gasification; Incineration; Monte Carlo simulation; Sewage sludge