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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Towards water and energy self-sufficiency : a closed-loop, solar-driven, low-tech laundry pilot facility (LaundReCycle) for the reuse of laundry wastewater
Authors: Bühler, Devi
Antenen, Nadine
Frei, Matthias
Koller, Christoph
Rousseau, Diederik P. L.
Schönborn, Andreas
Junge, Ranka
et. al: No
DOI: 10.1007/s43615-021-00077-2
Published in: Circular Economy and Sustainability
Volume(Issue): 1
Issue: 3
Page(s): 1037
Pages to: 1051
Issue Date: 12-Jul-2021
Publisher / Ed. Institution: Springer
ISSN: 2730-597X
Language: English
Subjects: Greywater treatment; Wastewater reuse; Laundry wastewater; Biological wastewater treatment; Self-sufficiency; Off-grid solar power
Subject (DDC): 333: Economics of land and resources
620: Engineering
Abstract: In the scope of this study, a pilot facility for the recycling of laundry effluent was developed and tested. With the aim to enable nearly complete energy and water self-sufficiency, the system is powered by a photovoltaic plant with second-life batteries, treats the wastewater within the unit and constantly reuses the treated wastewater for washing in a closed cycle. The technology for wastewater treatment is based on a low-tech approach consisting of a physical/mechanical pre-treatment and biological treatment in trickling filter columns. The treatment process is operated in batch mode for a capacity of five washing cycles per day. During five weeks of operation water quality, energy consumption and production, water losses and washing performance were monitored. The system recovered 69% of the used water for the washing machine while treating the wastewater to the necessary water quality levels. The average COD removal rate per cycle was 92%. Energy analysis was based on modelled data of the monitored energy consumption. With the current set-up, an internal consumption rate of 80% and self-sufficiency of 30% were modelled. Future developments aim at increasing water and energy self-sufficiency and optimizing the water treatment efficiency.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: Life Sciences and Facility Management
Organisational Unit: Institute of Natural Resource Sciences (IUNR)
Published as part of the ZHAW project: LaundReCycle South Africa
Appears in collections:Publikationen Life Sciences und Facility Management

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