Optimization of Ozonation Process for the Reduction of Excess Sludge
Production from Activated Sludge Process of Sago Industry Wastewater Using Central Composite Design
Figure 1
Contour and three-dimensional surface plot of VSS reduction. (a) Effect of pH and ozone time at fixed retention time (5.5 days). (b) Effect of pH and retention time at fixed ozone time (10.5 minutes). (c) Effect of ozone time and retention time at fixed pH 7.
