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ADVANCED TREATMENT BY CHEMICAL OXIDATION OF PULP AND PAPER EFFLUENT FROM A PLANT MANUFACTURING HARDBOARD FROM WASTE PAPER.
- Source :
- Environmental Technology; Oct2008, Vol. 29 Issue 10, p1045-1051, 7p, 5 Charts, 3 Graphs
- Publication Year :
- 2008
-
Abstract
- This study attempts to evaluate the applicability of chemical oxidation processes to polish biologically treated effluent of a plant manufacturing hardboard from waste paper to comply with the discharge limit of 120 mg l-1 chemical oxygen demand (COD). In the first step, a chemically assisted settling was applied. The optimum results were obtained with alum plus lime with the alum dose of 200 mg l-1. In the second step, chemically assisted settling effluent was fed into an activated sludge system and over 80% COD removal was achieved. In the last step of the experimental study, a series of ozone oxidation and Fenton oxidation methods were tested to remove residual COD. Ozone oxidation provided 80% COD removal. An ozone dose of 40 mg min-1 with a reaction time of two hours was found to be optimum. Catalytic ozonation by using ferric iron, as well as high pH ozonation, Fenton process and H2O2/O3 oxidation did not prove to be more efficient than plain ozonation under these study conditions. [ABSTRACT FROM AUTHOR]
- Subjects :
- OXIDATION
PAPER
WASTE paper
HARDBOARD industry
OZONIZATION
Subjects
Details
- Language :
- English
- ISSN :
- 09593330
- Volume :
- 29
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Environmental Technology
- Publication Type :
- Academic Journal
- Accession number :
- 35730806
- Full Text :
- https://doi.org/10.1080/09593330802175823