Activated Sludge Process Types and Modifications
"Explore important types and modifications of the activated sludge process, including conventional, tapered aeration, step aeration, completely mixed, and extended aeration systems. Learn how each method functions to treat wastewater effectively and efficiently."
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Presentation Transcript
Important types and modifications of activated sludge process
1. Conventional process: consist of a rectangular basin, a clarifier and a solids return line from the clarifier bottom. (plug flow).
2. Tapered aeration process: This process attempt to match the oxygen supply to demand by introducing more air at the head. This can be achieved by varying process like the process above are sensitive to shock loading and the diffuser spacing. This toxic material
3. Step aeration process: distribute the incoming flow to number of points along the basin thus avoiding the locally high oxygen demand, this process provides sufficient dilution to protect against shock loading and toxic materials
4. Completely mixed process: in this process, the incoming waste and return sludge is dispersed uniformly throughout the basin , the effect of peak organic and toxic material is at minimum.
5. Extended aeration: it is a completely mixed process operated at long hydraulic retention time and long sludge age. The process is limited to small plants Many extended aeration plants are prefabricated (package plants).
