Feasibility analysis for bio-natural gas generated from high-concentration organic wastewater

Chenxuan Wang, Zhiwei Li, Raymond R. Tan, Kathleen B. Aviso, Fang Wang and Xiaoping Jia

Energy, 2024, vol. 313, issue C

Abstract: Abundant bioenergy is present in high-concentration organic wastewater (HCOW). Bio-natural gas (BNG) can be obtained through the utilization of HCOW anaerobic digestion and biogas upgrading technology, achieving pollution reduction and carbon mitigation simultaneously. The production process of HCOW-based BNG was modeled and simulated. The simulation results were then used to analyze the feasibility from economic, environmental, and operational perspectives. In addition, the impact of key parameters in the entire production process on unit greenhouse gas (GHG) emissions and product costs was explored. The utilization of sugarcane vinasse as a raw material for BNG production contributed to the reduction of GHG emissions associated with wastewater treatment. The results show that the equipment investment and electricity consumption account for 30.6 % and 18.7 % of the BNG production cost. The avoidance of methane emission during wastewater treatment resulted in a GHG emission reduction of 20.56 kgCO2e/m3 from BNG production. The production of BNG from HCOW exhibited economies of scale, and the monetization of environmental benefits through subsidies could enhance its overall profitability.

Keywords: Process simulation; Circular economy; Decarbonization; Biofuel; Bioenergy; System analysis (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:313:y:2024:i:c:s0360544224034868

DOI: 10.1016/j.energy.2024.133708

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