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Int J Environ Res Public Health. 2018 Jun 15;15(6). pii: E1269. doi: 10.3390/ijerph15061269.

The Influence of Phosphogypsum Addition on Phosphorus Release in Biochemical Treatment of Sewage Sludge.

Author information

1
Department of Applied Ecology, Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University, 2, Rymskogo-Korsakova st., 40007 Sumy, Ukraine. e.chernish@ssu.edu.ua.
2
Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, 04200 Kosice, Slovakia. magdalena.balintova@tuke.sk.
3
Department of Applied Ecology, Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University, 2, Rymskogo-Korsakova st., 40007 Sumy, Ukraine. l.plyacuk@ecolog.sumdu.edu.ua.
4
Laboratory of Excellent Research, Faculty of Civil Engineering, Technical University of Kosice, Park Komenskeho 10/A, 04200 Kosice, Slovakia. marian.holub@tuke.sk.
5
Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, 04200 Kosice, Slovakia. stefan.demcak@tuke.sk.

Abstract

The paper is focused on the research of biochemical treatment of sewage sludge and phosphogypsum under sulphate-reducing conditions with a phosphorus release process. The theoretical foundations of the work were based on the biochemical formalization using the principles of autocatalysis of natural systems. During the experimental research for the control of physicochemical parameters of the process spectroquantic, X-ray fluorescence analysis and other techniques were used. A schematic model of the dephosphatation process under anaerobic stabilization of sewage sludge and phosphogypsum was developed. The increase of phosphogypsum dosage had a close correlation with the release of phosphate ions. At the stimulating action of the phosphogypsum additive, a 2.5⁻5.0-fold increase in soluble phosphate concentration was observed. The rational dose of phosphogypsum was determined. Along with an increase the ratio of COD (Chemical Oxygen Demand)/phosphogypsum to 0.1, an increase in the phosphate ions in solution was observed. A further increase in the ratio of COD/phosphogypsum did not affect the concentration of phosphate ions in solution.

KEYWORDS:

COD; phosphogypsum; phosphorus compound; phosphorus-recovery technology; sewage sludge

PMID:
29914075
PMCID:
PMC6025267
DOI:
10.3390/ijerph15061269
[Indexed for MEDLINE]
Free PMC Article

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