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CONTRIBUTIONS VIEWING THE REDUCTION OF THE POLLUTING DEGREE FOR SULPHATE WASTE WATERS THROUGH THE PROCESS OF LIGNIN FLOCCULATION WITH PHOSPHORIC ACID AND DIAMMONIUMPHOSPHATE


IFRIM IRINA, CIOBANU DOMNICA, ANDRIOAI GABRIELA
UNIVERSITY OF BACĂU, CALEA MARASESTI 157, RO-5500 BACĂU, ROMANIA

Issue:

SCSCC6, Volume IV

Section:

Volume IV (2003)

Abstract:

The following technological stages, naming: the wood griding, washing and screening as well as the recovery of the sodium salts, generate sulphate waste waters which are characterized by a highly polluting chemical composition and high biodegradable because of the presence of lignin components. The reduction of the polluting degree is possible because of the flocculation technologies applied in acid medium with a mixture of reacting substances like phosphoric acid and diammonium phosphate.

Keywords:

sulphate water, depollution, lignin flocculation.

Code [ID]:

CSCC6200304V00S01A0012 [0001383]

Full paper:

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