Activated sludge aeration

The primary distinguishing feature of the improved activated sludge treatment system is that high-rate DAF is the secondary clarifier for separation of suspended solids from the activated sludge aeration basin effluent, as opposed to secondary sedimentation alone in a conventional activated sludge system. 

Yamamoto, K., Hiasa, M., Mahmood, T. and Matsuo, T. (1989) Direct solid-liquid separation using hollow fiber membrane in an activated sludge aeration tank. Water Science and Technology, 21 (4/5), 43—54. 

FIGURE 9.5 An activated sludge aeration tank at Back River wastewater treatment plant, Baltimore, MD. 

Different biological processes used for the treatment of wastes are activated sludge, aerated lagoons, anaerobic digestion, composting enzyme treatment, trickling filter, and waste stabilization ponds. 

Recently developed applications of activated carbon to wastewater treatment involve the addition of PAC to conventional activated sludge aeration tanks. The combination of PAC with biological process is often times referred to as the PACT or PAC-activated sludge process (3). The PACT process has attracted a great deal of interest because it is a method by which the performance of a waste treatment facility may be improved in various areas. Technical advantages that can potentially be achieved by adding PAC to biological reactors include ... 

Activated sludge aeration stage for a smallscale secondary sewage treatment plant operating at Central Saanich, British, Columbia. 

This study has confirmed earlier findings that LAS undergoes extensive biodegradation in activated sludge treatment. Biodegradation in the activated sludge aerator exceeds 97%. 

Treatment phase A = oil separation B = flocculation, filtration, and pH adjustment C-1,2,3 = biological treatment by activated sludge, aerated lagoon, and soil irrigation, respectively. 

Kalinske, A.A. (1970). Turbulence diffustvity in activated sludge aeration basins. Pergamon NY. 

MLSS mixed liquor suspended solids. The concentration of suspended solids in activated sludge mixed liquor, expressed in milligrams per litre. Commonly used in connection with activated sludge aeration units... 

---