The following works were completed in the scope of Manisa Organized Industrial District Wastewater Treatment Site 1st Plant Mechanical & Electrical Maintenance, Revision and Repair Works; - Construction of an underground concrete structure with a size of 9x3m. The new coarse screen was installed in this structure. The system has a 600 mm by-pass system below the ground. - Procurement, installation, commissioning of Huber Rotomat R05K coarse screen. - Dismantling of ail railings and climbing ladders in the unit, renewal and galvanizing or fabrication of them from stainless steel. - Dismantling works of inner and outer sluice system of primary and secondary settling tanks from stainless steel material. - Smoothening with epoxy plaster carried on bridge wheel way of thickeners. - Dismantling works of corroded cable trays and consoles and procurement and installation of the new ones.