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COMPOSTING :warning: (Parameters (Type of digester (batch, continuous and…
COMPOSTING
:warning:
Process description
sorting
grinding
composting
curing
screening
Biological option
Aerobic composting
presence of heat and moisture
Anaerobic digestion
methane gas
Parameters
Type of digester
batch, continuous and feed batch
Temperature
optimum 35C
pH
6.8-7.3
Operation mode
mixing mode
Technical parameter concern
Moisture
can be controlled directly/indirectly by changing the operating temperature or aeration regime
loss of water during composting due to evaporation
initial moisture content 55-65%
Temperature
best degradation 45-55C
optimum 55C to reduce pathogens
control
aeration
window
Aeration
aerobic metabolism of microorganisms
to control temperature
to remove the excess moisture and gases
provides oxygen to aerobic organism for degradation process
Carbon-Nitrogen ratio
need adequate level of nitrogen
optimal ratio is 25
low C/N ratio slows decomposition and increase nitrogen loss
high C/N ratio (>35) delays process