Power economy studies on activated sludge treatment

This study was focused on power economy of the activated sludge process which is the most energy consuming stage. The optimisation of oxygen requirements by using a Box complex algorithm method was investigated for different inflow rates, BOD loadings and related operating parameters. Linear regression analysis was used to obtain relationships between oxygen requirement, BOD loading and BOD removal under various operating conditions. The effect of such operating parameters as the MLSS concentration, hydraulic retention time and BOD loading on the power economy was investigated. Organic load and oxygen requirement relations for typical municipal wastewaters are presented in an attempt to obtain power economy in the aeration tank.

Key words:

• Power economy
• activated sludge
• oxygen demands
• aeration unit
• wastewater