**Author details**

Omar M. Waheeb\*, Mohanad Mahmood Salman and Rand Qusay Kadhim Chemical Engineering, Midland Refineries Co, Iraq

\*Address all correspondence to: omsuch@gmail.com

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*Study of Change Surface Aerator to Submerged Nonporous Aerator in Biological Pond… DOI: http://dx.doi.org/10.5772/intechopen.104860*
