Accession Number : ADP002407

Title :   Purification of Water and Sediments Using Organisms (Living Filter)--Removal of Suspended Solids and Nutrients by Phragmites communis t. and Zostera marina l.,

Corporate Author : JAPAN DREDGING AND RECLAMATION ENGINEERING ASSOCIATION TOKYO

Personal Author(s) : Otsuki,T.

Report Date : 1983

Pagination or Media Count : 20

Abstract : In order to clarify the purification efficiency of removal of SS (suspended solids) and nutrients in seawater by Phragmites communis t. and Zostera marina L., experiments were carried out to determine the correlations between the removal rates for three conditions: (1) the differences of flowing down systems (cascade vs maze system), (2) the volume of flowing water (3 flow conditions), and (3) the concentrations of SS in both planted and nonplanted test ponds. The following methods are generally considered more desirable for purification of the water: For removing SS and nutrients, the flowing down method using the cascade type ponds under less volume of flowing water; For removing nutrients, the flowing down method controlling the volume of flowing water to remain for 8 - 10 days; and For removing P04-P, a filtrating process using sand-gravel layers.

Descriptors :   *Environmental management, *Sea water, *Purification, *Aquatic plants, Nutrients, Extraction, Filtration, Experimental design, Removal, Japan

Distribution Statement : APPROVED FOR PUBLIC RELEASE