Process for the removal of heavy metals contained in wastewaters

Details Process for the removal of heavy metals contained in wastewaters Process for the removal of heavy metals contained in wastewaters

1985-11-18

1987-05-12

Hruskoci, Peter

Liquid purification or separation

Processes

Treatment by living organism

210624, 210625, 210630, 210631, 210912, C02F 330

Patent

active

046648046

ABSTRACT:
A process is provided for the removal of heavy metals from wastewater prior to being fed to a wastewater treatment installation, with anaerobic sludge to cause the anaerobic sludge to absorb heavy metals in the wastewater. Thus, the heavy metals depleted wastewaters can then be treated in a conventional treatment plant and thereafter, the resultant sludge can be directly employed for agricultural purposes without requiring further treatment to remove heavy metals therein. To effect the process a preferred reactor is made up of two parts, a cylindrical mixing tank and a superposed funnel-shaped sedimentation zone.

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Gould et al., "Heavy Metal Complexation Behavior In Anaerobically Digested Sludges", WPCEJ, Literature Review, p. 1204, Jun. 1979.
English translation of p. 1, lines 16-18 and p. 1, line 44 to p. 2, line 7 of DE-C-666,060 (Germany).
English translation of p. 11 of DE-A-2 263047 (Germany).
English translation of p. 17 of DE-A-2 414521 (Germany).
Chemical Abstracts, vol. 93, No. 22, Dec. 1, 1980, p. 331, No. 209735h, C. Versino et al.
Chemical Abstracts, vol. 95, No. 6, Aug. 10, 1981, p. 355, No. 48699y.

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