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Survey of pesticide residues in agricultural products in Nagano prefecture [Japan]
2003
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Yoshihara, H. | Tsukioka, T. | Miyagawa, A. | Nakazawa, H. | Hanaoka, Y. | Sato, S.
Specific loadings from nonpoint sources in the basin of Lake Suwa [Japan]
1994
Miyajima, I. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Kouno, Y. | Kawamura, M. | Matsuzawa, K. | Terasawa, J. | Kakegawa, H.
Measurements of solar ultraviolet radiation (UV-A, YV-B) in Nagano city [Japan]
2001
Harada, T. (Nagano-ken. Research Inst. for Health and Pollution (Japan))
Examination of the similarity of change of patient's number among the areas in Japan using surveillance data
1999
Wada, M. (Nagano-ken. Research Inst. for Health and Pollution (Japan))
Water quality characterization of Hizawa River [Japan]
1991
Kohno, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Harada, T. | Muramatsu, K. | Higuchi, S. | Kondoh, K. | Kuwabara, H.
Present condition of groundwater pollution in Nagano prefecture [Japan]
1989
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Miyajima, I. | Harada, T.
Sewage treatment in an oxidation ditch plant on Kita-shiga heights [Japan]
1989
Ozawa, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Suzuki, T. | Itoh, S. | Matsui, M. | Furihata, A.
The removal of organics and nitrogen was investigated in a sewage treatment plant by oxidation ditch process. Influent and effluent samples were taken each month for the 2-year period and examined. The wastewater with average BOD value of 240 mg/l was treated in an oxidation ditch at a periodical average MLSS concentration of 3,100 mg/l. Average BOD of the effluent was 19 mg/l and BOD removal averaged 94%. Average total-N in the effluent was 11 mg/l, the bulk of which was composed of Kjeldhal-N, and nitrogen removal averaged 74%. Alkalinity reduction was about 3 mgCaCO3/l per apparent decrease of 1 mg/l ammonia-N, though the theoretical value by nitrification is 7.14 mgCaCO3/l, and no large pH drop was observed in the effluent. Alkalinity loss by nitrification was considered to be mitigated by generation of alkalinity by deamination and denitrification. Apparent 50% ammonia-N removal corresponded to the residual alkalinity of 110 mgCaCO3/l.
Show more [+] Less [-]Transition of water pollution load in Lake Suwa [Japan]
1987
Terasawa, J. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Kawamura, M. | Higuchi, S. | Nakazawa, Y.
Study on component of hazardous industrial solid wastes: A report of actual investigation in Nagano prefecture [Japan]
1979
Maruyama, M. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Akaoka, T. | Yanagimachi, Y.
