Abstract
A hybrid mode of aeration using "suck" and "blow" with tem perature feedback control was used in a static pile composting process. Its performance was compared with the classical aer ated static pile process using positive pressure aeration (blow ing) based on temperature feedback control including low rates of fixed aeration. The two piles used in the trial each used shredded municipal solid waste (MSW) as the substrate. The characteristic temperature/time profiles for both control strategies were monitored alongside other physico-chemical parameters including volatile solids content (and extent of reduction), C/N ratio, moisture content, pH, and electrical conductivity. Specific oxygen uptake rate (SOUR) was also measured to determine the stability of the compost. The indi cator organisms for faecal contamination, faecal coliforms and faecal streptococci were monitored to determine the extent of sanitisation of the compost.
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