Abstract
In this study, one year of operating experience with a solar sludge drying plant in Pafos wastewater treatment plant is discussed. The plant had a total area of 3,853 m2 and consisted of four parallel lines. Two types of dewatered sludge with considerably different dry matter content were used. 5,678 tn of dewatered sludge were introduced in the plant and the dried sludge had an average dried solids content of 80.9%, which corresponded to a surface annual evaporation rate of 1.14 tn H2O m−2a−1. The results indicated that solar drying may be a particularly favorable option for sewage sludge drying at climatic conditions such as those prevailing in the East Mediterranean area.
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