ADVANCED OXIDATION PROCESSES FOR DECOMPOSITION OF SOLID SLUDGE FORMED VIA HERBAL TREATMENT OF TEXTILE EFFLUENT

Abstract

The real time textile effluents having high chemical oxygen demand (COD), are potentially pollutant, because of their large volume and refractory nature. Biological processes generally are not capable to remove the pollutants present in the textile effluents. Advanced Oxidation Processes (AOPs) can produce a total mineralization, transforming recalcitrant compounds into inorganic substances or partial mineralization, transforming them into more biodegradable substances. In this study, solid sludge, formed as a result of addition of herbal coagulant in the real time textile effluent, and the filtrate are treated with two major AOPs such as ultrasound cavitation and ozonation process for the decomposition of solid sludge as well as removal of COD from the filtrate obtained from effluent to less than 150mg L-1

.The US cavitation process and ozonation process is carried out at five different pH from 2-10. US power is varied in the range of 50-250 W and ozone flow rate varied in the range of 2-6 g h-1

.The sludge decomposition

and COD removal at these conditions are studied in this investigation.