Marketing Compost (EAWAG) - The Water, Sanitation and Hygiene
Marketing Compost (EAWAG) - The Water, Sanitation and Hygiene
Marketing Compost (EAWAG) - The Water, Sanitation and Hygiene
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Photograph: Jonathan Rouse<br />
Photograph: Jonathan Rouse Photograph: Silke Rothenberger<br />
Manual windrow composting (Dhaka,<br />
Bangladesh)<br />
A windrow with a triangular cross-section is a<br />
convenient way of piling in long rows organic<br />
matter for composting. Windrows can make<br />
fairly efficient use of space <strong>and</strong> make compost<br />
turning relatively easy. In the case illustrated,<br />
windrows are turned manually to allow sufficient<br />
air supply. <strong>The</strong> aerobic condition allows<br />
the compost to mature within three months.<br />
Mechanical windrow composting (Luxor,<br />
Egypt)<br />
This system is comparable to manual windrow<br />
composting but is operated at a larger scale as<br />
mechanical equipment is used. Mixed waste<br />
is screened prior to composting. <strong>The</strong> organic<br />
waste, piled onto long windrows, is turned frequently<br />
by a machine.<br />
<strong>Compost</strong> chute (Sri Lanka)<br />
In this compost chute in Sri Lanka, waste is fed<br />
at the top. As more waste is added over a period<br />
of a few months, mature compost emerges<br />
at the bottom. Other techniques require rotating<br />
drums or several conveyor belts.<br />
Photograph: David Kuper<br />
High-tech aerated static pile composting<br />
(Bali, Indonesia)<br />
Instead of manual or mechanical turning of<br />
the compost, in this case the pile remains unturned.<br />
Air is forced through the material by<br />
pipes using a mechanical ventilator. In Europe,<br />
the piles are additional covered by a geo-textile<br />
to reduce moisture losses.