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Testing Water Yield, Efficiency of Different Meshes and Water Quality with a Novel Fog Collector for High Wind Speeds

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Article In Press
DOI: 10.4209/aaqr.2016.12.0528
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Christian Schunk 1, Peter Trautwein2, Herbert Hruschka2, Ernst Frost2, Leslie Dodson3, Aissa Derhem4, Jamila Bargach4, Annette Menzel1,5

  • 1 Ecoclimatology, Technische Universität München, 85354 Freising, Germany
  • 2 Water Foundation, 82067 Ebenhausen, Germany
  • 3 Worcester Polytechnic Institute, Worcester, MA 01609, USA
  • 4 Association Dar Si Hmad, Agadir 80 000, Morocco
  • 5 Institute for Advanced Study, Technische Universität München, 85748 Garching, Germany

Highlights

A novel large-scale fog collector design for use in high wind speeds is presented.
Durability of this design is investigated with a pilot facility in Morocco.
The water yield of 11 potential fog collection meshes is compared.
Water quality for selected meshes is examined.


Abstract

Fog harvesting techniques for water collection have been implemented successfully worldwide for several decades. However, at locations with high wind speeds, traditional installations require high maintenance efforts endangering the sustainability of projects. Furthermore, the efficiency of fog collection meshes and the water quality in the field are key questions for the implementation of large-scale facilities. This study presents a novel, durable fog collector design and investigates the yield (fog + rain) and inorganic water quality of different potential collection meshes at a test site in Morocco. The pilot facility proved very reliable with only minimal maintenance required. Rankings of the efficiency of different fog nets were set up, with monofilaments and three-dimensional structures tending to show higher yields than woven fabrics such as the traditional ‘Raschel’ mesh. However, differences from fog event to fog event could be identified. Water quality was better than that of local wells and met WHO guidelines, except for the ‘first flush’ just after the start of fog events.

Keywords

Fog collection Mesh Collector Water quality


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