Surface Scum Scraper Surface Scum Removal with Minimum Transportation of Water. Product Profile The Z3900 is a an efficient surface scum scraper with minimum transportation of water. • New wastewater treatment plants. • Retrofit to existing treatment works. • Water purification plants. • Can be used in conjunction with the Z2000 bottom sludge scraper but operated Independently. • Continuous or intermittent scum transportation to suit process. • Industrial process wastewater treatment plants. • Suitable for use in combination with Lamella systems or in flotation tanks. • Adaptable to most tanks. • Simple to install. • High operational reliability. • Adjustable scraper speeds. • Scum mechanism 100% stainless steel. • Minimal headroom required. How it works The Z3900 is characterised by its step-by-step movement. The drive bar moves forward and returns, the blade being fastened to a slide that is moved forward stage by stage by the drive bar. A system of levers on the slide changes its direction of movement when it reaches its end position. This means that it is possible to install several blades in series in one tank, the scum being passed from one blade to the next on its way to the scum pipe. Drive Bar Each blade is angled upwards 90° during its return. Scum Blade To obtain maximum scum dry solids content, the Z3900 should be combined with a Z6300 or Z6500 scum pipe or a Z6900 scum beach. Technical Specification • Dimensions: - Maximum length = 80 m. - Maximum width = 12 m. - Maximum surface area = 700 m2. • Multiple units can be installed in parallel in larger tanks. • learance - The Z3900 requires approximately 400 mm clearance above the surface of the water. C • aterial: Stainless steel ASTM 304 or acid-resistant ASTM 316. M

Technical Specification The Z6300 scum pipe is automatically angled or rotated to the exact extent required to receive the scum decanted by the surface scraper. Its movement can be controlled by a water level gauge in the tank itself. • Sizing:Available in two sizes - 200 mm or 300 mm diameter. • Material:100% stainless steel. The Z6300 is best suited for use with scum with a low total solids content. With stable water levels it is possible to minimise the amount of water removed with the scum. The scum pipe can be powered electrically or hydraulically or may be operated by manual lever. Installation...