Water Purification of Plant and Bed Filter Materials using Kanumatsuchi

Takasuna, Hiroyuki; Ozaki, Yasushi; Abe, Kazuyuki

doi:10.2521/jswtb.41.51

Cited by 1 publication

(1 citation statement)

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“…It is possible to enhance the purification function by careful filter material selection. For example, zeolite improves the efficiency of removal of ammonium N because of its high cation exchange capacity, and Kanuma pumice improves the removal efficiency of P because of its high P adsorption capacity 17,22 . To remove N from wastewater with low concentrations of organic matter (such as waste fertigation fluid), use of a lime-sulfur agent makes it possible to promote denitrification by (2) Purification performance Absorption by plants accounts for a comparatively large part of N and P removal in the BGF ditches 1,2,4 .…”

Section: Biogeofilter Channel (1) Characteristicsmentioning

confidence: 99%

Vegetation-based Wastewater Treatment Technologies for Rural Areas in Japan

Abe

Kato

Ozaki

2010

JARQ

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Nitrogen and phosphorus loading of rural areas in Japan has recently exceeded environmental tolerance levels, thereby causing deterioration of aquatic environments. Rural areas need suitable low-energy, low-cost purification technologies. Vegetation-based water treatment uses the purification functions inherent to natural ecosystems and is therefore likely to be adaptable to rural areas. Here, we review the water purification processes associated with vegetation-based water treatment systems. We then describe three purification technologies that are being developed for practical water pollution treatment in rural districts. The first is a free-water-surface-flow constructed wetland planted with indigenous wild rice (Zizania latifolia) in the Koibuchi College biotope zone, which receives secondary-treated wastewater from the college dormitories. The second is a hybridtype subsurface-flow constructed wetland system for purifying milking-parlor wastewater in cold regions. The third is a biogeofilter channel in which terrestrial plants (including most crops) can be grown by adjusting the filter material height to suit the plants' moisture tolerance. We discuss the advantages and disadvantages of the three treatment technologies in terms of their introduction at various sites, and we consider yudone, a traditional vegetation-based purification system once used by Kyushu-region farmers.

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Section: Biogeofilter Channel (1) Characteristicsmentioning

confidence: 99%