Treatment of Agricultural Wastewater with Chlorpyrifos by Coupling of Heterogeneous Photocatalysis and Anaerobic Biological Process


Treatment of wastewater with Chlorpyrifos content using heterogeneous photocatalysis was evaluated, for which a compound parabolic collector (CPC) was used, under different combinations of pH and TiO2 concentration designed using the response surface methodology (RSM), and an anaerobic biological process based on the specific methanogenic activity test (SMA), using a flocculent sludge and an initial concentration of 2.0 g VSS/L. Initially, water resulting from the triple washing of equipment for manual application of Chlorpyrifos from the El Zulia Irrigation District and the municipality of Bucarasica were characterized. In the biological process, COD and TOC removals of 46.4% and 86.6% were obtained; while by applying preliminary photocatalytic processes, under optimal conditions of TiO2 (100 mg/L), pH (3 units) and retention time (3 h), better biodegradability efficiencies (72.2% and 53.0%) were achieved. The results revealed that the combined use of advanced oxidation processes with biological treatment technologies is technically viable, as it increases the efficiency of removing contaminants from agricultural effluents with Chlorpyrifos.

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This study was funded by UFPS (Grant No. FINU 046-2018).

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Correspondence to Dorance Becerra.

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Becerra, D., Barrientos, I., Rodriguez, A. et al. Treatment of Agricultural Wastewater with Chlorpyrifos by Coupling of Heterogeneous Photocatalysis and Anaerobic Biological Process. Top Catal (2020).

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  • Pesticides
  • Compound parabolic collector
  • TiO2
  • Response surface methodology
  • Specific methanogenic activity
  • Real wastewater