バイオジオフィルターによる高度水処理

概要

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We made use of the ability of zeolite to adsorb NH_4^+, that of Kanuma soil to adsorb PO_4^<3-> and that of pak-bunk (a tropical aquatic vegetable) to absorb N and P to develop a biogeofilter suitable for advanced wastewater treatment. Wastewater secondary effluent was used as influent, and the tests of continuous treatment with a column biogeofilter were done. By treatment of secondary effluent and diluted secondary effluent corresponding in quality to river water at the total organic carbon (TOC) loading rate of 8 to 23 mg of TOC/l.d, it was possible to remove of 40% of the TOC, more than 80% of the total nitrogen and more than 98% of the total phosphorus. Pak-bung planted on a filter bed of zeolite and Kanuma soil grew well with low influent N and P concentrations. Sufficient N and P were available to the plants because of adsorption of these elements in the filter bed. The mass balances of N and P in the biogeofilter system showed that about 70% of N removal and 30 to 40% of the P removal were due to absorption by pak-bung. Pak-bung was useful in the treatment of waste-water by biogeofiltration.
社団法人日本生物工学会の論文
1987-01-25