【Paper】
Cadmium Removal in Flue Gas from the Incineration of Scallop Waste Using Sorbent Particulate
Ryo Yoshiie*, Yuki Hashimoto**, Mari Hoshiai*, Shigeyuki Uemiya*, Makoto Nishimura* and Hiroshi Moritomi**
* Faculty of Engineering, Gifu University
** Graduate School of Engineering, Gifu University
† Correspondence should be addressed to Ryo Yoshiie:
Faculty of Engineering, Gifu University
（1-1 Yanagido, Gifu, 501-1193 Japan）

Abstract
The scallop mid gut gland（MGG）is known as a waste product that contains much cadmium, a toxic heavy metal. With the aim of establishing an optimum de-cadmium process in MGG incineration, this study seeks basic data for showing guidelines. Experimental examination was carried out on cadmium emission behavior and the removal of cadmium vapor from exhaust gas. Kaolinite particles were utilized as a sorbent. Results showed that cadmium in MGG started emission to exhaust gas at temperatures higher than 600℃. The whole quantity volatilizes under an 850℃ oxygen lean combustion condition. The organic volatile matter included in MGG inhibited cadmium capture by the kaolinite particle. In addition, cadmium capture performance by the kaolinite particle was compared for packed bed and fluidized bed conditions. Greatest cadmium capture efficiency of 80％ was obtained under a fluidized bed condition with a sample from which we had removed organic volatile matter ex ante.

Key words: scallop mid-gut gland, cadmium, flue gas treatment, sorbent, particulate kaolinite