Treatment of Agricultural Wastewater Containing Pesticides by Hydrophytic Method as a Preliminary Method of Water Recovery

Katarzyna Ignatowicz (), Jakub Łozowicki, Bożena Łozowicka and Jacek Piekarski
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Katarzyna Ignatowicz: Faculty of Civil Engineering and Environmental Sciences, Białystok University of Technology, 15-351 Białystok, Poland
Jakub Łozowicki: HYDRATECSp zoo, Por. Anatola Radziwonika 12, 15-166 Białystok, Poland
Bożena Łozowicka: Institute of Plant Protection-National Research Institute, Field Experimental Station, Chełmońskiego 22, 15-195 Białystok, Poland
Jacek Piekarski: Faculty of Civil Engineering, Environmental and Geodetic Sciences, Koszalin University of Technology, 75-453 Koszalin, Poland

Energies, 2023, vol. 16, issue 2, 1-15

Abstract: The purpose of this study was to determine the feasibility of using a hydrophytic method to degrade selected pesticides (pyraclostrobin and boscalid) from agricultural waste (wastewater) and to evaluate their removal efficiency. This will allow the recovery of water and raw materials from agricultural wastewater. In addition, a biopreparation was used to increase the efficiency of the process and the rate of degradation and reduce the half-life of the compounds in wastewater. Pesticides, which are commonly used in agriculture, were selected for the experiments. The study was conducted on a pilot scale, in two identical hydrophytic treatment systems supported and not supported by microorganisms. At the same time, in order to identify pesticides, an analytical method based on liquid chromatography-tandem mass spectrometry was optimized, enabling the determination of applied pesticides in wastewater with satisfactory sensitivity, accuracy and precision. The kinetics of pesticide decomposition in the hydrophytic bed were determined on the basis of mathematical models and equations of the dynamics of pesticide disappearance in wastewater. The parameters of the DT 50 half-life of pesticides in wastewater and the parameters of theoretical time to reach the concentration level of 0.01 mg/L were determined. The use of three different layers (0.15, 0.40 and 0.15 m) of chemically inactive granulometrically differentiated (2 ÷ 8, 8 ÷ 20 and 20 ÷ 80 mm) filter material influenced the high treatment efficiency. During the entire experimental period, the wastewater feeding the bed was treated satisfactorily. The determined parameters of the pesticide half-life in DT 50 wastewater ranged from 2.33 to 3.29 for microorganisms and 3.42 to 3.79 without microorganisms. The determined parameters of the theoretical time to reach the concentration of 0.01 mg/L t 0.01 were about 22 and 38 days for microorganisms and 33 and 44 days without microorganisms. Thus, it can be unequivocally concluded that the biopreparation has influence on reducing the half-life of the tested pesticides

Keywords: hydrophytic method; pesticide decomposition; biopreparation bio aqua pur; constructed wetland bed (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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