Abstract
In order to better understand land application of sewage sludge, the nutrient properties and heavy metal concentrations in sewage sludge were investigated from two different wastewater treatment plants in China. The results show that the OM contents were significantly different between Shenyang domestic sewage treatment plant and Ganqika domestic sewage treatment plant. The OM contents were 48.75% and 77.66%, respectively. The total nutrient contents, contained TN, TP and TK content, were 3.65% and 4.24%, respectively. It was found that the total concentrations of As (182.7 mg/kg dry matter) and Ni (109.0 mg/kg dry matter) in Shenyang sewage sludge, and Hg (23.7 mg/kg dry matter) in sewage sludge generated from Ganqika are higher than Chinese regulation limit of pollutant for sludge to be used for agriculture (GB18918-2002), Hg and Ni elements are main restrictive factor of sewage sludge application for agricultural use. Keywords-domestic sewage sludge; nutrient; heavy metal; solid waste reuse
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call