This paper describes a pilot installation of a green wall treating greywater from an office building in Pune, Maharashtra State (NaWaTech project). The pilot installation is located at the main entrance of the state agency responsible for water supply and sanitation. The experimental analysis is in two phases. First phase analysed the results from green walls filled only with LECA® (lightweight expanded clay aggregate). Since results from the first phase were not satisfactory, a second phase was developed. In the second phase, LECA plus sand and LECA plus coconut fibres were tested as porous media in order to increase residence times and consequently green wall treatment performance. The expected improvements in treatment efficiency have been confirmed by the wider range of observed removal rates between Phase I (chemical oxygen demand, COD, 16–20%) and Phase II (i.e. COD removal in the order of 14–86% and 7–80% for LECA-coconut and LECA-sand, respectively), denoting higher treatment potentialities for the new configurations. The obtained effluent quality was fulfilling the Indian law specifications for reuse in irrigation for all the analysed samples, while only the last samples collected during Phase II were showing an appropriate quality for reuse by flushing toilets.
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Research Article|
May 31 2016
Green walls for greywater treatment and recycling in dense urban areas: a case-study in Pune Available to Purchase
F. Masi;
1IRIDRA Srl, Via La Marmora 51, Firenze 50121, Italy
E-mail: [email protected]
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R. Bresciani;
R. Bresciani
1IRIDRA Srl, Via La Marmora 51, Firenze 50121, Italy
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A. Rizzo;
A. Rizzo
1IRIDRA Srl, Via La Marmora 51, Firenze 50121, Italy
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A. Edathoot;
A. Edathoot
2Ecosan Services Foundation, First floor, Flat no1.24, Prashant Nagar, 721/1, Sadashiv Peth, Pune, Maharashtra, India
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N. Patwardhan;
N. Patwardhan
2Ecosan Services Foundation, First floor, Flat no1.24, Prashant Nagar, 721/1, Sadashiv Peth, Pune, Maharashtra, India
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D. Panse;
D. Panse
2Ecosan Services Foundation, First floor, Flat no1.24, Prashant Nagar, 721/1, Sadashiv Peth, Pune, Maharashtra, India
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G. Langergraber
G. Langergraber
3Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences, Wien, Austria
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Journal of Water, Sanitation and Hygiene for Development (2016) 6 (2): 342–347.
Article history
Received:
February 04 2016
Accepted:
April 30 2016
Citation
F. Masi, R. Bresciani, A. Rizzo, A. Edathoot, N. Patwardhan, D. Panse, G. Langergraber; Green walls for greywater treatment and recycling in dense urban areas: a case-study in Pune. Journal of Water, Sanitation and Hygiene for Development 1 June 2016; 6 (2): 342–347. doi: https://doi.org/10.2166/washdev.2016.019
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