64
3 Bio-augmented Composting of Organic Wastes in Villages and Towns
Fig. 3.1 Convection
currents and other factors
affecting aeration of a static
compost pile
According to temperature change, the composting process can be divided into
different stages. Figure 3.2 reveals the typical change curves of temperatures during static-pile composting and forced-aeration composting. The optimum growth
temperature of bacterial community is different from that of fungal community. For
example, the optimum growth temperatures of psychrophilic bacteria, mesophilic
bacteria and thermophilic bacteria are 13 °C, 21–48 °C and 45–68 °C, respectively.
On this basis, the composing process can be partitioned into temperature-rising,
high-temperature and maturation periods. During the temperature-rising period of
composting, the temperature of the pile gradually increases, then rises to the peak
at the high-temperature period and finally gradually declines to enter the maturation
period.
Fig. 3.2 Typical
temperature curves for static
composting and aerated
composting
3 Bio-augmented Composting of Organic Wastes in Villages and Towns
Fig. 3.1 Convection
currents and other factors
affecting aeration of a static
compost pile
According to temperature change, the composting process can be divided into
different stages. Figure 3.2 reveals the typical change curves of temperatures during static-pile composting and forced-aeration composting. The optimum growth
temperature of bacterial community is different from that of fungal community. For
example, the optimum growth temperatures of psychrophilic bacteria, mesophilic
bacteria and thermophilic bacteria are 13 °C, 21–48 °C and 45–68 °C, respectively.
On this basis, the composing process can be partitioned into temperature-rising,
high-temperature and maturation periods. During the temperature-rising period of
composting, the temperature of the pile gradually increases, then rises to the peak
at the high-temperature period and finally gradually declines to enter the maturation
period.
Fig. 3.2 Typical
temperature curves for static
composting and aerated
composting