Oxygen uptake of biosolids compost was measured during both laboratory and full-scale studies. Aerobic respirometry of solid samples of compost provided a precise measure of microbial activity. There was a noticeable decreasing trend in oxygen consumption over 25 days of composting, thereby indicating increasing stability. Moisture content also was found to affect the compost stability. During 48-hour respirometer tests, the compost sample did not dry to the point where respiration was inhibited. Measurement of volatile solids reduction alone during biosolids composting with large quantities of sawdust revealed little about stability.
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Paletski et al. (1995) studied this question.
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