Purification of domestic wastewater by paddy field
1998
Iwasaki, S. (Tochigi-ken. Agricultural Experiment Station, Utsunomiya (Japan)) | Mori, S. | Sekiwa, T. | Omura, H.
Paddy fields near urban areas were investigated of the effects of irrigation water polluted by domestic wastewater on the yield and characteristics of purification. 1) It was concluded that the decontamination of nitrogen was contributed to denitrification and assimilation of rice, from nitrate nitrogen decrease and amount of assimilation of rice. The average removed load of T-N during irrigation period were calculated at 0.13kg/ha/day. 2) Detour irrigation (width=1m, length=40m) in paddy fields were useful to improve quality of rice. The average removed load of T-N during irrigation period in the small channel were calculated at 0.54kg/ha/day
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