Measurement of water content and moisture distribution in sludge by 1H nuclear magnetic resonance spectroscopy. Issue 3 (17th February 2016)

• Record Type: Journal Article
• Authors: Mao, Huazhen; Wang, Fei; Mao, Feiyan; Chi, Yong; Lu, Shengyong; Cen, Kefa
• Is Part Of: Drying technology. Volume 34:Issue 3(2016)
• Page Start: 267
• Page End: 274
• Publication Date: 2016-02-17
• Subjects: 1H NMR -- moisture distribution -- sewage sludge -- water content; Drying -- Periodicals; Desiccation; 660.28426
• DOI: 10.1080/07373937.2015.1047952
• Languages: English
• ISSNs: 0737-3937

Abstract

ABSTRACT: 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 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 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°C. NMR is more accurate, rapid, and nondestructive than other water distribution measurement methods.