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Publication type: Bachelor thesis
Title: Green wall for greywater treatment : literature review and wall design
Authors : Balducci, Andrea
Advisors / Reviewers : Junge, Ranka
Stutz, Erich
DOI : 10.21256/zhaw-19259
Extent : 45
Issue Date: 2019
Publisher / Ed. Institution : ZHAW Zürcher Hochschule für Angewandte Wissenschaften
Publisher / Ed. Institution: Winterthur
Language : English
Subjects : Green walls; Greywater reuse; Greywater treatment; Synthetic greywater; Vertical gardens; Green technology; Water treatment; Nature based solutions (NBS); Swiss wild plants
Subject (DDC) : 635: Garden crops (Horticulture)
Abstract: This study presents the development of an outdoor greywater treating green wall by adapting a commercially available system, identifying which native swiss wild plant species can be implemented and examining how operational conditions (substrate and irrigation method) influence nutrient removal from synthetic light greywater. The experiment was conducted over a 2 months’ time period located in a greenhouse at the ZHAW Wädenswil, in Switzerland. A total of nine plant species, three substrates (Vulkaponic; Vulkaponic plus biochar; perlite plus coco peat) and two irrigation methods (drip irrigation; top-down irrigation) were tested. The synthetic GW was recirculated and renewed weekly. The results showed that swiss wild plant species can successfully adapt to greywater, only one out of nine species (N. officinale) didn’t adapt to the system. The expected differences in treatment efficiency have been confirmed by the wider range of observed removal rates between the different substrates. Vulkaponic (chemical oxygen demand, COD, 74-76%, biochemical oxygen demand, BOD, 46-53%), Vulkaponic plus biochar (COD 77-83%, BOD 56-58%) perlite plus coco peat (COD 27-35%, BOD 58-61%), denoting higher treatment potentialities for COD with the Vulkaponic based substrates and for BOD with the perlite coco peat mixture. Overall the drip irrigation method was better for plant growth, but slightly worse for the COD and BOD removal efficiency.
License (according to publishing contract) : Licence according to publishing contract
Departement: Life Sciences and Facility Management
Appears in Collections:Bachelorarbeiten Umweltingenieurwesen

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