International Journal of Waste Resources

Textile wastewater treatment via ozonation pre-treated with ultrasound cavitation and Fenton-like advanced oxidation processes

World Congress on Sustainable Waste Management

June 21, 2023 | Webinar

Satyajit Shukla

National Institute for Interdisciplinary Science and Technology, India

Scientific Tracks Abstracts: Int J Waste Resour

Abstract:

The Common Effluent Treatment Plant (CETP) at the Kerala Industrial Infrastructure Development Corporation (KINFRA), Kannur, and Kerala, India daily treats one lakh litres of textile effluent, containing azo reactive dyes, with the chemical oxygen demand (COD) removal of almost 100%. Nevertheless, large amount (80- 100 kg per day) sludge is produced in the stage-1 facility, due to the involvement of chemical and biological processes, which creates handling, storage, transport and reuse issues. Hence, the present work primarily focuses on treating the KINFRA effluent for the maximum COD removal without the generation of any solid sludge. Advanced oxidation processes (AOPs), such as the modified ultrasound (US) cavitation, Fenton-like, and ozonation (O3), have been utilized as stand-alone techniques for this purpose. Moreover, the modified US cavitation and Fenton-like AOPs have also been employed as pre-treatment methods for the post-treatment with the O3 process which has been conducted at the varying O3 flow rate (2-6 g h-1). The US cavitation process has been modified by investigating the effect of various parameters, such as the US power (50-250 W), initial effluent pH (2-10), and O2 flow rate (1-4 L min-1). On the other hand, for the development of Fentonlike AOP, flyash (FA)-Pd composite particles have been synthesized via an electro less process and utilized as activator to activate the various oxidants such as the persulfate (S2O82-) and hydrogen peroxide (H2O2) to generate the radical-ions (�?�OH and O2�?�-) for the decomposition of azo reactive dyes present within the textile effluent. The concept of mixed oxidants has also been utilized for the treatment of KINFRA effluent via the Fenton-like method. It has been observed that although the maximum COD removal (93%), without the sludge formation, is obtained by using the Fenton-like process as a pre-treatment and O3 as a posttreatment, the stand-alone O3 process which provides the COD removal of 86-90%, without the sludge formation, appears to be the most superior for the treatment of textile effluent at the commercial level since it can bypass the need of synthesizing and utilizing large amount of FA-Pd based catalyst.

Biography :

Satyajit Shukla obtained his Ph.D. from the University of Central Florida (UCF), Orlando, Florida, U.S.A. in 2002. During his Post-Doctoral research at UCF during 2002-2006, he worked in the area of hydrogen technology funded by NASA, Glenn, U.S.A. in collaboration with the Kennedy Space Center (KSC), Titusville, Florida, U.S.A... He joined CSIR-NIIST, Thiruvananthapuram, and Kerala, India in 2006 and presently he is working as a Principal Scientist. He visited Argonne National Laboratory (ANL), U.S.A. in 2009-2010 as an Indo-US Science and Technology Forum (IUSSTF) Research Fellow. His current areas of research include the textile wastewater treatment via the advanced oxidation processes (AOPs) and the development of hydrogen leak detectors. He has published 78 research articles, 5 book chapters, and holds 5 U.S. patents. He is a life member of Society for Environmental Chemistry and Allied Sciences (SECAS), India and Materials Research Society of India (MRSI). His Google Scholar Citation h-index is 30 with the total citations > 4000.