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ORIGINAL RESEARCH
Physicochemical and Chemical Purification of Tannery Wastewaters
J. Naumczyk, M. Rusiniak
Technical University of Warsaw, Faculty of Environmental Engineering, Nowowiejska 20, 00-653 Warsaw, Poland
Pol. J. Environ. Stud. 2005;14(6):789-797
KEYWORDS
ABSTRACT
In this study the process of tannery wastewater treatment by electrocoagulation and coagulation with FeCl3 followed by advanced oxidation processes (Fenton reaction, O3/OH-, O3/H2O2, H2O2/UV) was investigated. Electrocoagulation resulted in a slightly better purification effect than coagulation. The purification effect obtained by AOPs decreased in the order: Fenton reaction 3/OH- 3/H2O2 2O2/UV. A two-step process (coagulation + H2O2/UV method) resulted in 93-94% reduction of COD. Coagulation followed by Fenton reaction in 30 min. was recognized as the best method of purification of tannery wastewaters - COD was reduced by 85-88%. The concentration of ammonium ions was decreased by 62-64% when O3/OH- method was applied.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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| eISSN: | 2083-5906 |
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