β Scribed by T. Goto; T. Hakuta
No coin nor oath required. For personal study only.
Hon-uachi. Shibuya-ku. Tokyo 151. Japan In considering pollution of coastal seawater. one must expect same degrade of product water in a distillation process. Also. diffusion of waste brine fmm a desalination plant into the sea should be estimated on account of seawater intake design and of environnental protection. This paper is concerned with the pollution problems to be studied for a distillation process. Chemical analysis of sulfide ion at concentrations iower than 1 ppn wes developed, and the procedure was applied to a field survey of pollution at Tokyo Bay. Distributions of volatile pollutants in a distillation process uere studied with experinents of both laboratory and field tests. The results revealed that axraonia had a tendency to concentrate in fresh water. Consequently. some processes were studied to prevent from ammonia contamination. Concerning diffusion of naste brine, fundanental experiments uere combined with neasurenents of actual brine discharge from the test module of the Hational Project. It was found that a submerged type of discharge device was effective to reduce influential extent of waste brine. INTR00UCT10N Recent increases in industrial productivity and population density on costal area will lead desalting engineers to pay considerable attention to pollution of seawater. Houever. few research has been devoted to the pmblen in the past years. In the R 8 D of the Japanese Sea Water Desalting and By-product Recovery Program. the Water Quality Research Cmup spent about 1 billion yen (3.8 million dollars) in 4 years including a preparatory period for technology assessment. This paper,presents the basic idea, research project and train results obtained by the Group except ccu-rosion problem.
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