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Gewählte Master / Diploma Thesis:

Katharina Hofbauer (2022): Innovative Bewässerung durch Grauwasserrecycling. Die Untersuchung der Eignung von Grauwasser zur Bewässerung gebäudenaher Begrünung.
Master / Diploma Thesis - Institut für Ingenieurbiologie und Landschaftsbau (IBLB), BOKU-Universität für Bodenkultur, pp 126. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Worldwide many countries already established greywater irrigation systems for urban green infrastructure. The recycling of greywater offers a great opportunity to save fresh water and to implement a lasting and promising use of irrigation water. There is still a lack of use in Europe, but the laws for greywater recycling indeed do exist. The research at issue tried to survey the impact of treated and untreated greywater irrigation on plant vitality and growth. To this end an 17-week-long examination of two common street trees (Acer pseudoplatanus and Tilia cordata) and three plant species, which are often used for vertical green (Geranium macrorrhizum, Hedera helix und Heuchera sanguinea) was carried out in three different irrigation groups (freshwater, treated greywater and untreated greywater). The objective was to detect if these forms of irrigation had a negative impact on the following parameters of interest: stomatal conductivity, relative chlorophyll content, growth rates (number of leaves, wet weight of sprout and root, biomass, terminal shoot) as well as the nitrate-, phosphate- and pH-value of the soil. Repeatedly, the parameters were measured and statistically evaluated by making use of ANOVA and two-way ANOVA for repeated measurements. By means of an evaluation matrix, the applicability of the examined plants for greywater irrigation could be assessed successfully. The irrigation with treated and untreated greywater had no significant effect on chlorophyll- and growth-rates of most of the examined species. Greywater irrigation resulted in a small increase in soil pH and phosphate but had no significant influence on nitrate. The results suggest that the greywater recycling instead of the use of fresh water for irrigation provides a high potential to guarantee a sustainable long-term water supply. Greywater helps to meet the water demand of plants in urban green infrastructures, which maintain necessary ecosystem services.

Beurteilende*r: Stangl Rosemarie
1.Mitwirkender: Gräf Michael

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