Measurement of water content and moisture distribution in sludge by super(1)H nuclear magnetic resonance spectroscopy

Moisture distribution in sludge is essential for the examination of dewatering problems; however, sufficiently rapid and accurate methods of sludge moisture measurement are currently lacking. Hence, this study investigated a low-field super(1)H nuclear magnetic resonance (NMR) method for measuring w...

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Bibliographic Details
Published in:Drying technology 2016-02, Vol.34 (3), p.267-274
Main Authors: Mao, Huazhen, Wang, Fei, Mao, Feiyan, Chi, Yong, Lu, Shengyong, Cen, Kefa
Format: Article
Language:English
Subjects:
Dewatering
Drying
Measurement methods
Moisture
Moisture content
Nuclear magnetic resonance
Sludge
Water distribution
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Summary:Moisture distribution in sludge is essential for the examination of dewatering problems; however, sufficiently rapid and accurate methods of sludge moisture measurement are currently lacking. Hence, this study investigated a low-field super(1)H nuclear magnetic resonance (NMR) method for measuring water content and moisture distribution in sludge. Moisture content measured by NMR was closely correlated with the thermal drying method (R super(2) = 0.999). The loss of mechanical bound water from sludge was the primary cause of the decrease in water content from 96 to 37% during thermal drying at 40 degree C. NMR is more accurate, rapid, and nondestructive than other water distribution measurement methods.
ISSN:0737-3937
1532-2300
DOI:10.1080/07373937.2015.1047952