yPaperz
Analysis of BOD Substance and Nitrogen Concentrations in a Pretreatment Pond for a Sea-based Solid Waste Disposal Site
Takayuki Nishio*, Taro Yoshikura*, Osamu Yamamoto* and Isao Fukunaga*õ
* Osaka City Institute of Public Health and Environmental Sciences
*õ Osaka University of Human Sciences
õ Correspondence should be addressed to Takayuki Nishio:
Osaka City Institute of Public Health and Environmental Sciences
i8-34 Tojo, Tennoji, Osaka, 543-0026 Japanj
Abstract
Concentrations of nitrogen compounds and organic matters such as BOD and COD substances in a pretreatment pond tend to increase at the later stages of land reclamation in sea-based solid waste disposal sites. For this reason carefully planning is required for land reclamation with wastes. Relationships between monthly amount of disposed materials and the behavior of BOD and nitrogen concentrations were analyzed and parameters concerning elution and decomposition were determined. Using acquired coefficient values, continuous reclamation and intermittent reclamation models were simulated and the intermittent reclamation model was proven to be effective in controlling BOD and total nitrogen concentrations.
Key words: sea-based land reclamation, simulation of water quality, BOD, nitrogen concentration