Recycled Vertical Flow Constructed Wetland (RVFCW) - A novel method of recycling greywater for landscape irrigation in small communities and households

Gross, A. et al. (2007)

Published in: 2007

Author:
Gross, A. et al.

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SuSanA secretariat


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Content - Summary

The use of greywater for irrigation is becoming increasingly common. Raw greywater is often contaminated and can cause environmental harm and pose health risks. Nevertheless, it is often used without any significant pre-treatment, a practice mistakenly considered safe. The aim of this study was to develop an economically sound, low-tech and easy to maintain treatment system (RVFCW) that will allow safe and sustainable use of greywater for landscape irrigation in small communities and households. RVFCW properties, removal efficiency, hydraulic parameters and feasibility were studied, as well as the environmental effects of the treated greywater, by monitoring a variety of water quality and quantity variables in soils and plants over time. The RVFCW was efficient in removing virtually all of the suspended solids, BOD and about 80% of the COD after 8 hours. Faecal coliforms dropped by 3-4 orders of magnitude from their initial concentration after 8 h, but this was not always enough to meet current regulations for unlimited irrigation. The feasibility analysis indicated return over investment in approximately two years. The study concluded that the RVFCW is a sustainable promising treatment system for greywater use that can be run and maintained by unskilled operators.

Additional information

Published in Chemosphere 66 (5), pp. 916-923

Bibliographic information

Gross, A. et al. (2007). Recycled Vertical Flow Constructed Wetland (RVFCW) - A novel method of recycling greywater for landscape irrigation in small communities and households.

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Constructed wetlands English

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