Water Reuse through Membrane Technologies for a Dairy Plant Using Water Pinch Simulation Software

Jonathan Cawettiere Espíndola (), José Carlos Mierzwa, Míriam Cristina Santos Amaral and Laura Hamdan De Andrade
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Jonathan Cawettiere Espíndola: International Reference Center on Water Reuse of the University of São Paulo (IRCWR-USP), Environmental and Hydraulic Department (PHA), Polytechnic School of the University of São Paulo (USP), São Paulo 05508-020, SP, Brazil
José Carlos Mierzwa: International Reference Center on Water Reuse of the University of São Paulo (IRCWR-USP), Environmental and Hydraulic Department (PHA), Polytechnic School of the University of São Paulo (USP), São Paulo 05508-020, SP, Brazil
Míriam Cristina Santos Amaral: Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, P.O. Box 1294, Belo Horizonte 30270-901, MG, Brazil
Laura Hamdan De Andrade: Department of Chemical Engineering, Pontifical Catholic University of Minas Gerais, Belo Horizonte 30535-901, MG, Brazil

Sustainability, 2023, vol. 15, issue 3, 1-11

Abstract: The main goal of this study is to evaluate possible reuse routes of effluents from adairy plant. First, the water flow in the plant was evaluated. All water consumed and effluents generated by the industrial process were quantified and characterized. In addition, the water quality parameters required for different industrial activities were assessed. Secondly, a treatment system using a membrane bioreactor and a nanofiltration reactor, from a study previously conducted by the authors, was considered. Then, a water pinch analysis was carried out through the application of the collected data using the Water Pinch software. Both direct reuse/recycle and regeneration schemes were investigated. In this context, although the direct reuse/recycle of effluents were shown to be able to reduce the freshwater use for the clean-in-place process (CIP) by 33.4%; the schemes with the regeneration of the effluents showed up to 66.7% and 95.4% of freshwater reduction for the CIP and general processes, respectively. Finally, four water reuse routes were proposed. The proposed route combining the most advanced treatment technologies studied showed the best performance in terms of reduction of the total freshwater consumption (69.5%) in the dairy plant.

Keywords: water reuse; membrane bioreactor; nanofiltration; reuse route; pinch analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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