domestic wastewater Reuse of treated water Use of rice cultivation 未発表のデータや試料が多く残っている。今後は整理を行うと共に発表や論文化を行う。 Water treatment is a strange field that produces good quality water from sewage. The resulting water is diluted in environmental water, but in an unnecessarily good treated water environment, it reduces biological productivity. In general, the quality of treated water in rural areas was unsuitable for rice cultivation, but since varieties with high nitrogen resistance were developed, it is now time to obtain good quality rice even if the water quality environment is poor. On the other hand, abundant nitrogen and phosphorus resources remain in the treated water. By using the wastewater from a treatment plant with a population of 2000 in paddy fields, the same effect as several tons of chemical fertilizer can be obtained.
