... Nutrients, Organic Matter and Heavy Metals from Paddy Field Drainage by Charcoal Asa Miura*, Eisaku Shiratani*, Koji Hamada*, Tadayoshi Hitomi*, Ikuo Yoshinaga** and Tomijiro Kubota* *Laboratory ... longitudinal spaces formed by the partitions. In order to reduce clogging of the equipment by biological waste suspended in the drainage water and to ensure the smooth flow of drainage water through ... obtained: (1) The TOC, TN, TP, Cr, Fe and Pb in the drainage from the paddy field were significantly removed by the equipment when the drainage contact time with the charcoal absorbent was longer...