A floor cleaning device having an anti-bacterial treatment system includes a recovery tank configured to receive and retain waste cleaning liquid, a recovery hose in fluid communication with the recovery tank, and a vacuum system configured to draw waste cleaning liquid from a surface that is being cleaned through the recovery hose and into the recovery tank. An anti-bacterial material is located whereby at least some of the waste cleaning liquid discharged into the recovery tank passes over the anti-bacterial material. In a particular embodiment a debris trap assembly is positioned within the recovery tank such that waste cleaning liquid drawn through the recovery hose passes through the debris tray prior to discharging into the recovery tank, with the anti-bacterial material disposed at the debris tray.