Dye decomposition by combined ozonation and anaerobic treatment: Cost effective technology
Smita Venkatesh, Department of Chemistry, Motilal Nehru National Institute of Technology, India ; Kumar Venkatesh, Department of Civil Engineering, Motilal Nehru National Institute of Technology, India ; Abdur Rahman Quaff, Department of Civil Engineering, National Institute of Technology, India
Journal of Applied Research and Technology Volume 15, Number 4, ISSN 1665-6423 Publisher: Elsevier Ltd
To control the total treatment cost of textile dye effluent a new advanced combined treatment technology has been investigated. Advanced oxidation processes like ozonation have much potential to degrade dye but its main drawback is high cost. To reduce the cost of ozonation for dye degradation and decolourization, ozonation followed by anaerobic biodegradation using upflow anaerobic sludge blanket (UASB) reactor was carried out. The synthetic textile wastewater containing Reactive Black 5 has been used in this study by this combined treatment process. The system of ozonation and anaerobic treatment by UASB reactor showed that the chemical oxygen demand (COD) reduction has reached to about 90% and dye removal 94% respectively. Combined treatment enhanced the overall color removal up to 10 on platinum cobalt (Pt–Co) scale. Thus the combined treatment process results in high color, COD and total organic carbon (TOC) removal efficiency which would minimize the overall treatment cost. Dye degradation products were analyzed by ion chromatography (IC) and UV–vis spectroscopy.
Venkatesh, S., Venkatesh, K. & Quaff, A.R. (2017). Dye decomposition by combined ozonation and anaerobic treatment: Cost effective technology. Journal of Applied Research and Technology, 15(4), 340-345. Elsevier Ltd.