2019 CSCE Annual Conference - Laval (Greater Montreal)

2019 CSCE Annual Conference - Laval (Greater Montreal) Conference

Life-cycle Assessment of Full-scale Membrane Bioreactor and Tertiary Treatment Technologies in Fruit Processing Industry

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Mr. Tong Chu, University of Guelph (Presenter)
Dr. Richard Zytner, School of Engineering, University of Guelph
Dr. Bassim Abbassi, University of Guelph

Fruit processing sector is one of the major water-consuming industries. Large amounts of wastewater is discharged by fruit processors containing high biological oxygen demand (BOD), total suspended solids (TSS), total nitrogen (TN) and total phosphorus (TP). If not properly treated, the receiving waters will be contaminated with the risk of eutrophication. Membrane bioreactor (MBR) is a feasible technology for treating the fruit processing wastewater, and when combined with tertiary treatment technology such as reverse osmosis (RO), water reuse is possible. The objective of this study is to quantitively analyze the total environmental benefits and impacts of the wastewater treatment technologies in fruit processing sector, comparing the impacts of different treatment options, including discharge without treatment. The quantitative metrics will show others users the benefits of being environmentally proactive. 

The environmental assessment will be achieved by conducting a life-cycle assessment (LCA) under the guideline of ISO 14040, the international standard for life-cycle assessment. The software SimaPro is applied for the LCA study and two methods are chosen for quantifying the life-cycle impact results, namely ReCiPe v1.11 and TRACI v2.1. Three scenarios are defined for the assessment: (1) no treatment; (2) MBR; (3) MBR + RO + UV. The life-cycle inventory is developed based on professional databases and a full-scale wastewater treatment facility in a fruit industry located in Ontario. The early results include a cradle-to-grave inventory throughout the life-cycle of each scenario, including raw material acquisition, component production, use, end-of-life treatment, and final disposal. Further analysis is ongoing to determine the life-cycle impact assessment and to quantify the environmental impacts of each scenario and a comparison among the treatment options. The completed paper will show scientific evidence for all stakeholders in the fruit processing sector on how to optimize their treatment options and make informed policy decisions.