This paper discusses fast yet simple method of treating effluents of textile industry by simple chemicals. Textiles industry produces substantial toxic, often loaded with color (from residues of reactive dyes and chemicals), acidic and alkaline contaminants having high pH, high concentration of organic materials etc, which requires proper treatment before being released into the environment. Re...

The control of sludge bulking by ozonation was studied on four parallel pilot-scale (110 l/d) biological nutrient removal systems. Bulking was caused by filamentous organisms which typically occur in nutrient removal systems, i.e. Type 0092, Type 0041 and Microthrix parvicella. Continuous dosing of ozone, at 1; 2 and 4 g O3 /kg mixed liquor suspended solids (MLSS).d resulted in a diluted sludge...

Effectiveness of ozonation before and after biological treatment for removal of recalcitrant organic matter in bleached kraft pulp effluents was compared. Two industrial ECF bleached eucalypt kraft pulp effluents (E1 and E2) were pretreated with 100 mg O3/L. Raw and pretreated effluents were treated biologically in bench-scale sequencing batch reactors, under constant conditions. Following biol...

Dyes are one of prevalent types of chemicals used by human being today. Dyes are organic compounds which have complex aromatic molecular structure that make them toxic and harmful. When these dyes introduced with water due to textile dyeing and printing industrial waste water may cause problems to all living organism. In these dyes highly toxic metals are used as mordents so the removal of thes...

Palm oil wastewater treatment was investigated via a filtration process using raw and calcinated limestone. Column studies were conducted different limestone sizes (4, 12, 20 mm), calcination temperature (800 °C 600 °C) various rates (20, 60, 100 mL/min), comparison made with under similar conditions. The response surface methodology central composite design employed to optimize the parameter. ...

Anaerobic treatment system was used for determination of colour removal under batch conditions. Azo-dye (Reactive Black 5, RB 5) with glucose as a carbon source was used as a synthetic wastewater. The decolourization process follows first order kinetics with respect to RB 5 azo-dye concentration in batch conditions. Decolourization rate constant (k1) value for dye concentration of 150 mgL was 0...