Effluent Pollution Control of Osaka North Port Dredged Soil Disposal Site (North Section-Site II & III)

Autor:	Miyoji Konae, Kiyoshi Hatano, Isao Fukunaga, Zensuke Inoue, Toshihiko Hasebe, Kazuhiro Takamizawa
Rok vydání:	1991
Předmět:	Pollution Suspended solids Environmental Engineering Municipal solid waste Waste management Sedimentation (water treatment) media_common.quotation_subject Environmental engineering Wastewater Phytoplankton Environmental science Sewage treatment Effluent Water Science and Technology media_common
Zdroj:	Water Science and Technology. 23:1619-1628
ISSN:	1996-9732 0273-1223
DOI:	10.2166/wst.1991.0616
Popis:	In Osaka City, the dredged soil has been diposed in a sea-based solid waste diposal site since 1975. The pond of the solid waste disposal site plays a role of sedimentation and purification for a very large bulk of wastewater with the dumped dredged soil. According to monthly observations of the pond, COD value rose in spring and autumn with suspended solids concentration and reached a maximum value of 50.6 mg/l. It was understood that the cause of COD rise was the exponential growth of phytoplankton and evident that removal of suspended solids such as phytoplankton was necessary to improve wastewater quality. Accordingly various wastewater treatment methods were examined. A pollution preventive membrane of 30 m width and 2 m depth was constructed in 1985. The maximum effective level of COD removal was 73 % and below 20 mg/l of COD was kept stable. From the point of both construction and maintenance costs, it was concluded the pollution preventive membrane method was the most economically effective wastewater treatment method.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9914e4f651a0531e549eef418ac94d38 https://doi.org/10.2166/wst.1991.0616 Zobrazit plný text záznamu