(best examples and good practices) on household organic waste ...

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composting where the material is mixed with a dry porous substrate like
woodchips <strong>and</strong> it forms a thin liquid film in which decomposition can occur.
Paved surfaces for the pile construction areas that permit capture <strong>and</strong> control
runoff <strong>and</strong> allow operation during wet weather are important for the whole
process to be functionable. The most common aeration system involves the use
of a grid of subsurface piping (Figure 2.7). Pipes that provide aeration, consists
of flexible plastic drainage tubing assembled on the composting pad. Before
constructing the static pile, a thin layer of woodchips is placed over the
aeration pipes or grid so that the air distributed to the material is uniform. The
static pile is then built up to 2.6–3.9 m using a front-end loader. A cover layer of
screened or unscreened compost is placed over the sludge to be composted.
Typically, oxygen is provided by pulling air through the pile with an exhaust
fan. Air that has passed through the compost pile is vented to the atmosphere
via a compost filter for odor control. (Nelson et al., 2009)
The temperatures in the inner portions of a pile are usually adequate to destroy
a significant number of the pathogens <strong>and</strong> weed seeds present. The surface of
piles, however, may not reach the desired temperatures for destruction of
pathogens because piles are not turned as in the case of windrow composting
technology
Aerated static pile composting systems (Figure.5) have been used successfully
for MSW, yard trimmings, biosolids, <strong>and</strong> industrial composting. It requires less
l<strong>and</strong> than windrow composting. (EPA., 1995)
Figure 5.: Static aerated compost pile
(Tchobanoglous <strong>and</strong> Kreith., 2002)