Study of conditioning technologies of secondary wastes produced from contaminated water treatment, 1; Cement solidification of sludge from coagulating sedimentation device

Sugaya, Atsushi ; Horiguchi, Kenichi ; Akutsu, Shigeru; Sato, Junya ; Nakayama, Takuya  ; Kawato, Yoshimi; Meguro, Yoshihiro  

Cement solidification of sludge produced from contaminated water treatment by a coagulating sedimentation device was studied. Effect of water-to-cement ratio, loading rate, and components in the sludge on curing was investigated using simulated sludge. We have performed R&D work to apply cement solidification to the sludge and evaluated characteristics of solidification process with an eye towards the disposal as a basic study of waste treatment technology to prepare for the case if the sludge storage ability is not completely under safe conditions based on the results of long-term storage measure study. The results from these studies demonstrate that the simulated sludge can be successfully encapsulated by ordinary cement. We will investigate an allowance against variation of sludge constituents and characteristics and study a dissolution behavior of cesium and hazardous component from the waste form in the future.