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Int. J. Environ. Res. Public Health 2018, 15(6), 1269; https://doi.org/10.3390/ijerph15061269

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

1
Department of Applied Ecology, Faculty of Technical Systems and Energy Efficient Technologies, Sumy State University, 2, Rymskogo-Korsakova st., 40007 Sumy, Ukraine
2
Institute of Environmental Engineering, Faculty of Civil Engineering, Technical University of Kosice, Vysokoskolska 4, 04200 Kosice, Slovakia
3
Laboratory of Excellent Research, Faculty of Civil Engineering, Technical University of Kosice, Park Komenskeho 10/A, 04200 Kosice, Slovakia
*
Author to whom correspondence should be addressed.
Received: 15 May 2018 / Revised: 5 June 2018 / Accepted: 11 June 2018 / Published: 15 June 2018
(This article belongs to the Section Environmental Science and Engineering)
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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. View Full-Text
Keywords: phosphorus compound; phosphorus-recovery technology; sewage sludge; phosphogypsum; COD phosphorus compound; phosphorus-recovery technology; sewage sludge; phosphogypsum; COD
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Chernysh, Y.; Balintova, M.; Plyatsuk, L.; Holub, M.; Demcak, S. The Influence of Phosphogypsum Addition on Phosphorus Release in Biochemical Treatment of Sewage Sludge. Int. J. Environ. Res. Public Health 2018, 15, 1269.

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