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Changes of water quality and quantity in leachate discharged from wastes packed cloumn
2003
Shinohara, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Suzuki, T. | Oguchi, F. | Murakami, R. | Kawamata, S. | Ishikawa, T.
Contact treatment of secondary treated domestic waste water using charcoal bed
1997
Kohno, Y. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Suzuki, T. | Yokokawa, T. | Terashima, 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 [-]Study on the wastewater treatment exhausted from the chemical laboratory, 2: The ferrite process and its actual application
1979
Seki, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Katsuno, T.
