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Drying Technology
An International Journal
Volume 33, 2015 - Issue 4: Sludge Drying and Dehydration
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Special Issue Articles

The Effect of Adding Straw on Natural Solar Sludge Drying

Liming ShaoInstitute of Waste Treatment and Reclamation, Tongji University, Shanghai, P. R. China;Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban–Rural Development, Shanghai, P. R. China
,
Tianfeng WangInstitute of Waste Treatment and Reclamation, Tongji University, Shanghai, P. R. China;State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai, P. R. China
,
Ling ZhaoInstitute of Waste Treatment and Reclamation, Tongji University, Shanghai, P. R. China;State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai, P. R. China
,
Guanzhao WangInstitute of Waste Treatment and Reclamation, Tongji University, Shanghai, P. R. China;State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai, P. R. China
,
Fan LüInstitute of Waste Treatment and Reclamation, Tongji University, Shanghai, P. R. China;State Key Laboratory of Pollution Control & Resource Reuse, Tongji University, Shanghai, P. R. China
&
Pinjing HeInstitute of Waste Treatment and Reclamation, Tongji University, Shanghai, P. R. China;Centre for the Technology Research and Training on Household Waste in Small Towns & Rural Area, Ministry of Housing and Urban–Rural Development, Shanghai, P. R. ChinaCorrespondence[email protected]
Pages 414-419 | Published online: 30 Oct 2014
 
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Abstract

The effect of straw on natural solar sludge drying was investigated. As the thickness of the stack increased, the rate of water removal per unit area slightly increased and the rate of water removal per unit volume rapidly decreased. The rate of water removal increased as the accumulation of solar energy increased but decreased as the relative humidity increased. On the 23rd day, the moisture content of the dewatered sludge and the chopped straw mixture decreased from 75.2 to 45.1% at a thickness of stack of 30 cm, with an average water evaporation rate of 7.2 kg/m2d.

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