Prediction of moisture variation during composting process: A comparison of mathematical models
2015
Wang, Yongjiang | Ai, Ping | Cao, Hongliang | Liu, Zhigang
This study was carried out to develop and compare three models for simulating the moisture content during composting. Model 1 described changes in water content using mass balance, while Model 2 introduced a liquid–gas transferred water term. Model 3 predicted changes in moisture content without complex degradation kinetics. Average deviations for Model 1–3 were 8.909, 7.422 and 5.374kgm−3 while standard deviations were 10.299, 8.374 and 6.095, respectively. The results showed that Model 1 is complex and involves more state variables, but can be used to reveal the effect of humidity on moisture content. Model 2 tested the hypothesis of liquid–gas transfer and was shown to be capable of predicting moisture content during composting. Model 3 could predict water content well without considering degradation kinetics.
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