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Chapter: Environmental Biotechnology: Aerobes and Effluents

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The Oxidation Ditch

This is a sometimes used for sewage treatment and is characterised by a con-structed ellipsoidal ditch, in which the effluent is forced to circulate around the channel by brush aerators.

The Oxidation Ditch

This is a sometimes used for sewage treatment and is characterised by a con-structed ellipsoidal ditch, in which the effluent is forced to circulate around the channel by brush aerators. The ditch itself is trapezoidal in cross-section to maintain uniform effluent velocity throughout the channel. Effluent is fed into the system without any prior primary sedimentation and typically gives rise to only 50% of the surplus sludge produced by a typical activated sludge process.

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