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Composting (Parameter Factors (Temperature (optimum 35C), Alkalinity and…
Composting
Parameter Factors
Temperature
optimum 35C
Alkalinity and pH
6.8-7.3 pH
Type of digester
Baatch, continous, feed batch
Modes of operation
mixing modes
Technical parameter concern
Temperature
Best degradation 45-55 oC
55 oC optimum temperature for reduction pathagon
Control
Aeration level
Window
Aeration
aerobic metabolism of microorganisms
to control temperature
to remove the excess of moisture and gases.
Aeration provides oxygen to the aerobic organisms necessary for
Moisture
initial moisture content between 55 and 65%
During composting, a loss of water occurs as a consequence of evaporation.
Moisture can be controlled either directly by adding water or indirectly by changing
the operating temperature or the aeration regime.
Carbon/nitrogen ratio
degradation process
need adequate levels of nitrogen.
optimal carbon/nitrogen (C/N) ratio is 25.
low C/N ratio slows decomposition and increase nitrogen loss
high C/N ratio (>35) delays the process,
Biological option
Aerobic composting
Aerobic biological conversion
Compost
the process of breakdown of organic by micro-organism by presence of heat and moisture
Anaerobic digestion
Aerobic biological conversion
Methane gas
Process Description
Sorting
Grinding
3.Compsoting
Curing
Screening