Studies on treatment systems of wastewater, and research on removal of nitrogen and phosphorus from various industrial wastewaters
1981
Sano, M. (Aichi-ken. Environmental Research Center, Nagoya (Japan)) | Sato, M. | Harada, F. | Osagane, F. | Kawasaki, T. | Senda, Y. | Ishida, H. | Mizuno, M. | Arakawa, Y.
As a kind of counter-plan for the eutrophication of lakes and coastal marine, the trend of nutrient salts of the existing waste water disposal facilities was researched. The results were as follows; There were only a small number of facilities showing high removal ability for nitrogen and phosphorus, but as general, excepting coagulating sedimentation of phosphorus, the removal efficiencies were distributed widely or localized high and low parts. In concentrical relative frequency distribution of waste waters and final effluents, the difference among types of industry was existed, but in most case those distributions were logarithmic normal. In final effluents of agriculture, public health and waste management services, concentrations of nitrogen and phosphorus were comparatively high.
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