Before treatment, the river water is class V or worse than class V, with SS up to 51mg/l, and turbidity up to 48NTU. After treatment, the river water is expected to be class IV, with SS below 5mg/l, and turbidity below 5NTU. By the look of it, the river water is expected to be clean and clear. The process flow rate is 50-68m³/h. The treatment process includes: river water – pre filter – old CF – discharge to river, together with aerators, wet lands, aqua plants and animals introduced in the river.