Process for removing polyamine chelating agents form aqueous sol

Details Process for removing polyamine chelating agents form aqueous sol Process for removing polyamine chelating agents form aqueous sol

1999-03-26

2000-02-01

Wyse, Thomas G.

Liquid purification or separation

Processes

Treatment by living organism

210631, 210757, 210908, C02F 900, C02F 312

Patent

active

060199016

ABSTRACT:
The invention provides a process for removing polyamine chelating agents from aqueous solutions comprising oxidising the chelating agents with oxygen in the presence of an equivalent amount of a transition metal such as iron, followed by biologically reducing the chelates in the presence of an electron donor, and optionally by membrane filtration. The biological reduction is carried out with denitrifying and/or sulphate-reducing bacteria.

REFERENCES:
patent: 4530963 (1985-07-01), DeVoe et al.
patent: 4614587 (1986-09-01), Andersson et al.
patent: 5082573 (1992-01-01), Goldstein et al.
patent: 5534148 (1996-07-01), Suzuki et al.

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