ACTIVATED-SLUDGE TREATMENT OF DISPERSED DYE FACTORY WASTE-WATER

To provide design data applying to the treatment of wastewater from di spersed dye factories, an experimental study was undertaken using benc h-scale completely mixed activated sludge reactors fed with dispersed dye factory effluent as a substrate. Kinetic coefficients were determi ned at different hydraulic retention times and compared with published data for other substrates. The results showed that when biochemical o xygen demand (BOD) was utilized as a measure Of substrate concentratio n, the values obtained for the substrate removal rate coefficient k=0. 00063 L/mg BOD-hr, sludge yield coefficient Y=0.26 kg MLVSS yield/kg B OD removed, and sludge endogenous decay coefficient K-d=0.003 1/day.