Integrated life cycle assessment-analytic hierarchy process (LCA-AHP) with sensitivity analysis of phosphorus recovery from wastewater in Metro Manila
College
Gokongwei College of Engineering
Department/Unit
Chemical Engineering
Document Type
Conference Proceeding
Source Title
IOP Conference Series: Materials Science and Engineering
Volume
778
Issue
1
Publication Date
4-30-2020
Abstract
© 2020 IOP Publishing Ltd. The adverse environmental impact caused by eutrophication has recently prompted the Philippine government to issue stringent regulatory standards for wastewater effluent quality. The involved stakeholders and industries are assessing the integration of biological nutrient removal (BNR) technologies in the current sewage treatment plant (STP) scenario. Moreover, efforts are being done to utilize wastewater as a resource such us recovery of nutrients as struvite fertilizer from the wastewater sludge. Since BNR and nutrient recovery systems are not yet integrated in STPs, the magnitude of the environmental impacts are yet to be evaluated in the Philippine setting. This study covers the holistic evaluation of the overall environmental performance scores of the following scenarios using a consequential Life Cycle Assessment (LCA) framework integrated with Analytic Hierarchy Process (AHP) in the context of Water-Energy-Food Nexus: 1) current STP scenario; 2) BNR technology; and 3) nutrient recovery system. The environmental impact assessment was done using IMPACT 2002+ methodology in terms of the following impact indicators: human health, ecosystem quality, climate change, resources, aquatic acidification, and aquatic eutrophication. Value judgments from relevant stakeholders were elicited to rank the relative importance of the impact indicators in the evaluation of the overall environmental performance score. The LCA-AHP results show that the integration of a nutrient recovery system is the most preferred scenario. Sensitivity analysis was also done to evaluate the effects of changes in diet and utilization of alternative energy.
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Digitial Object Identifier (DOI)
10.1088/1757-899X/778/1/012145
Recommended Citation
Pausta, C. J., Razon, L. F., Orbecido, A. H., Saroj, D. P., & Promentilla, M. B. (2020). Integrated life cycle assessment-analytic hierarchy process (LCA-AHP) with sensitivity analysis of phosphorus recovery from wastewater in Metro Manila. IOP Conference Series: Materials Science and Engineering, 778 (1) https://doi.org/10.1088/1757-899X/778/1/012145
Disciplines
Chemical Engineering
Keywords
Phosphorus; Water—Phosphorus content
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