كنترل بالكينگ غيررشته اي در فرآيند لجن فعال كارخانه نوشابه سازي در مقياس پايلوت

Pilot Control of Viscous Bulking in the Activated Sludge Treatment of Industrial Effluent from Soft Drink Plants.

Viscous bulking is a typical problem arising in activated sludge facilities treating effluent from soft drink plants. The drawbacks associated with this phenomenon include increased effluent organic loading and undesirable sludge settlement. In order to investigate this phenomenon, a soft drink factory was selected as a pilot plant for a ease study (where metal tanks were used as a biological selector, an aeration basin, and a clari fieri The study shows that the major causes of viscous bulking are high organic loading and undesirable ratio of monovalent to divalent cations. In the biological selector (with a retention time of 20 hours), while the organic load in the influent to the aeration basin decreased by about 50%, with an impact on reduced viscous bulking. pH value decreased from 12 to 6.5 due to fatty acids production. Adjusimenl of Na/Cu ratio improved bacterial surface hydrophobicity and prevented degradation of biological foes. This resulted in improved sludge scttleabilitv. Application of this method improved sludge settling, made llocs stronger, and reduced diluent organic load (COD) to less than 150 nig/1, indicating stability oi the system.