Title: Statistical optimisation for biological decolourisation and COD removal of screen-printing wastewater using Trametes versicolor
Authors: S.V. Srinivasan; T. Swaminathan; D.V.S. Murthy
Addresses: Department of Environmental Technology, Central Leather Research Institute, Adyar, Chennai 600 020, India ' Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai 600 036, India ' Department of Chemical Engineering, Indian Institute of Technology, Madras, Chennai 600 036, India
Abstract: The conventional treatment methods employed in decolourisation of industrial wastewater are not effective and lead to generation of hazardous sludge. In the present investigation, a systematic study of three important process variables (concentration of initial colour, glucose and ammonium chloride) influencing the decolourisation and Chemical Oxygen Demand (COD) removal in screen-printing wastewater by Trametes versicolor was carried out using a full-factorial Central Composite Design. The statistical significance of the regression model equation using Analysis of Variance (ANOVA) showed that the model was highly significant. The multiple response optimisation showed that decolourisation and COD removal efficiency in this case were 72.8 and 76.3%, respectively.
Keywords: COD removal; chemical oxygen demand; decolourisation; screen-printing wastewater; Trametes versicolor; white-rot fungi; wastewater treatment; colour concentration; glucose; ammonium chloride; central composite design; CCD; ANOVA; statistical optimisation.
International Journal of Environment and Waste Management, 2013 Vol.11 No.3, pp.304 - 314
Accepted: 29 Jan 2011
Published online: 05 Apr 2013 *