Method of chemically fixing liquid aqueous sludge by means of a

Details Method of chemically fixing liquid aqueous sludge by means of a Method of chemically fixing liquid aqueous sludge by means of a

1990-02-23

1991-08-27

Silverman, Stanley S.

Liquid purification or separation

Processes

Chemical treatment

210724, 106791, 106792, 106816, C02F 1114

Patent

active

050430815

ABSTRACT:
A liquid aqueous sludge is transferred into a cylindrical-conical tank and gitated by blowing in air through a downwardly extending tube. A closed circulation of sludge is established between this main tank and a reagent tank by means of a recycling pump. The reagent tank overflows into the main tank. Chalk is added to the reagent tank and a pozzolanic material is added to the main tank. When the mixture of dilute sludge, chalk and possolanic material is homogeneous, it is transferred to a filter press by means of a further pump. The filter cake is collected for final storage or discharged to set slowly.

REFERENCES:
patent: 4514307 (1985-04-01), Chestnut et al.
patent: 4675114 (1987-06-01), Zagyvai et al.
patent: 4902431 (1990-02-01), Nicholson et al.

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