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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.

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