We have established a prominent presence in our field by providing Secondary Treatment (Biological Treatment), which serves the crucial purpose of further refining effluent from primary treatment to eliminate residual organics and suspended solids. This process targets the removal of biodegradable dissolved and colloidal organic matter through aerobic biological treatment methods. It entails the utilization of aerobic microorganisms in the presence of oxygen to metabolize organic substances in wastewater. Various aerobic biological processes are employed in Secondary Treatment (Biological Treatment) to capture dissolved organic matter overlooked during primary treatment.