Nitrogen Transformation Processes Taking Place During the Intensive Phase of Composting
2002
Alexa, László | Füleky, Gy
N transformation processes taking place during the intensive phase of composting were analyzed for characteristic compost raw materials in an adiabatic composting bioreactor by analyzing composts (in various stages of maturity), emitted gases and leakage water. Temperature exhibited a similar curve for all raw materials, with a gradual decrease in compost temperature from day 11-13 on. Measurements of NH <sub>3</sub> indicated a significant difference between the various raw materials, sometimes amounting to an order of magnitude, in the quantitative data of NH <sub>4</sub> volatilization. Analysis of leakage water indicated that ammonification and nitrification processes could be traced satisfactorily, but the quantity of leakage water formed in the adiabatic drum composter and the associated N losses were negligible compared to the total N cycle of compost formation. Analysis of the composts showed that the organic matter content of the samples declined during composting as the result of biodegradation.
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