Liquid purification or separation – Processes – Treatment by living organism
Patent
1980-10-23
1982-05-25
Schor, Kenneth M.
Liquid purification or separation
Processes
Treatment by living organism
210631, 210906, C02F 332
Patent
active
043315380
ABSTRACT:
For simultaneous elimination and fixation of phosphates from phosphate burdened aqueous liquids like sewage water a deposit space is formed by a soil matrix containing iron and/or aluminum. The soil matrix is defined by layers of poor hydraulic conductivity along its sides and at the bottom thereof and Limnophytae species like Phragmites, Typha, Carex, Glyceria, Eleocharis, Juncus, Iris pseudacorus, Iris versicolor, Schoenoplectus, Phalaris, Arundo are planted in the soil matrix to form a reactive space penetrated by the root systems of said plants. The phosphate containing liquid is introduced along one side of the deposit space and leaves the same with a phosphate content in the 0.1 mg/l range at flow rates in the range of 10.sup.-3 to 10.sup.-2 m per sec. Valuable phosphate deposits useful as arable land not requiring any phosphate fertilizer or useful as recoverable phosphate are obtained in amounts depending on the capacity and time period of phosphate fixation.
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