Ozonization manual for water and wastewater treatment Mathematical modelling in water and wastewater treatment Oxidation ditches in wastewater treatment Ultrasound in water and wastewater treatment Chemistry of ozone in water and wastewater treatment Instrumentation handbook for water & wastewater treatment plants Instrumentation handbook for water wastewater treatment plants Physicochemical methods for water and wastewater treatment Instrumentation handbook for water and wastewater treatment plants. Membrane unit process in water and wastewater treatment