Accession Number : ADP006840

Title :   The Biofilter System--Use of Aquatic Plants for Water Purification,

Corporate Author : JAPAN SEDIMENTS MANAGEMENT ASSOCIATION TOKYO

Personal Author(s) : Mishima, T. ; Inoue, T.

Report Date : APR 1992

Pagination or Media Count : 24

Abstract : This paper describes a mechanical system for cultivating aquatic plants (waterhyacinth, watercress) in rivers and lakes that are severely polluted, for the purpose of water purification. The system also addresses the recovery of overgrown aquatic plants and reutilization as fertilizer, feed, solid fuel, or methane gas. Through laboratory and field tests and use of a simulation model, the water purification effectiveness of various cultivation, growth, and removal scenarios can be estimated. A plan for recovery, disposal, and reutilization of aquatic plants is described. Experiments with test plants in Doho Pond (3.4 ha) in Ibaraki Prefecture demonstrated effective removal of nutritive salts, with less energy, low cost, and no waste generation.

Descriptors :   *AQUATIC PLANTS, *PURIFICATION, *WATER POLLUTION ABATEMENT, COSTS, DISPOSAL, ENERGY, FERTILIZERS, FIELD TESTS, FUELS, LOW COSTS, METHANE, RECOVERY, REMOVAL, RIVERS, SCENARIOS, SIMULATION, SOLID FUELS, TEST AND EVALUATION, WASTES, WATER, WATER HYACINTH, COST EFFECTIVENESS.

Subject Categories : Water Pollution and Control
      Agronomy, Horticulture and Aquiculture

Distribution Statement : APPROVED FOR PUBLIC RELEASE