FIG. 3.

Amounts of indicator microorganisms during four organic waste composting tests (mixtures A, B, C, and D). The reactor A waste content (on a wet weight basis) was 8% paper and cardboard, 31% fruits and vegetables, and 55% green waste; the reactor B waste content was 10% paper and cardboard, 54% fruits and vegetables, and 36% green waste; the reactor C waste content was 15% paper and cardboard, 54% fruits and vegetables, and 27% green waste; and the reactor D waste content was 21% paper and cardboard, 54% fruits and vegetables, and 18% green waste. The error bars indicate standard errors (error bars are not shown when the standard error was not larger than the histogram bar).