Study on Solidification Technology and Safety Assessment for Sewage Sludge

Jia Ying Sun; Yi Dong Xu; Jian Geng; Shu Min Ye

doi:10.4028/www.scientific.net/KEM.460-461.768

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 460-461Study on Solidification Technology and Safety...

Study on Solidification Technology and Safety Assessment for Sewage Sludge

Abstract:

In the light of heavy metal contents such as Pb and Zn in municipal sewage sludge exceeding the allowed maximum value of discharge wastes in China, new solidification technology was taken to solidify sewage sludge; its effect and safety were studied as well. The experiment results showed that the 28 days compressive strength of sewage sludge concretion were more than 40 MPa by this solidification method and a relative excellent advantage of road performance properties such as residual Marshall values and rutting resistance for asphalt mixture prepared with sewage sludge concretion. Meanwhile, its solidified heavy metal infusion met the requirements of the national standard, in other words, heavy metal ions receiving an effective bound and stable solidification.