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44 Spring 2022 INDUSTRY NEWS A skid mounted Dissolved Air Flotation (DAF) unit with a capacity of up to 30m3/hr was recently launched by MSE Systems and is the company’s first DAF unit to be available for short, or long- term hire, with a second unit (up to 20m3/hr), soon to be added for hire or pilot study. In addition to the DAF skid, each system includes a self- contained containerised chemical dosing unit. This unit provides the facility for fully automatic, flow proportional chemical pre-treatment, such as pH correction using alkali & acid, coagulant, emulsion polymer make-up and dosing. DAF units are used as a continuous wastewater treatment process. The new range of hire units have been designed for companies requiring a response to more stringent discharge requirements, increased seasonal loads on existing plants, and general production load increases on existing treatment plant. Pre-screened wastewater is first pre-conditioned using a pre-selected coagulant and polymer combination, at an optimum pH condition, to generate large flocs of contaminants within the wastewater. The flocs formed float, rather than settle, with the addition of air in the form of micro-bubbles. The DAF unit clarifies the wastewater by dissolving air under pressure then releasing it at atmospheric pressure. This generates a constant stream of microbubbles within the flotation tank, which attach to the pre-flocculated particle contaminants, and lift them to the top of the DAF tank where a thin sludge blanket collects on the surface. The sludge is removed using a paddle scraper mechanism into a hopper section within the tank. The DAF sludge is removed and can be further dewatered using a centrifuge to reduce volume, thereby reducing sludge disposal costs and traffic on and off site. It also has an added benefit of reducing the associated carbon emissions. NEWLY LAUNCHED DAF UNIT IS FIRST FOR HIRE A family-run plant hirer has hailed the “brilliant battery life” of its two new electric telescopic handlers which it says are delivering eight hours continuous operation on a single charge and performing equally well as its diesel counterparts. RJC Plant Hire has been trading for more than 20 years, serving the needs of major rail, construction, building, farming and landscaping firms. The Wellingborough-based company purchased the two new JCB 525-60E models with a fast charging option in response to direct requests from its customers for greener, lower emissions machines. They deliver zero emissions at point of use. RJC Plant Hire Managing Director, Peter Mullett said: “We have over 50 JCB telehandlers and have changed the majority of them over to HVO fuel for enhanced emissions performance. However, with several of our major customers asking for even greener machines, the electric JCB Loadalls were a must-have in order to help them reduce their carbon emissions. “The 525-60E machines have been excellent from day one. The battery life is brilliant, lasting significantly longer than competitors’ models we have tested. We can get eight hours’ continuous operation from a single charge which is fantastic for our customers – giving several days’ worth of typical operations.” A further benefit of electric operation is a significant reduction in noise levels, making the Loadall suitable for extended operation in sensitive urban job sites. External dimensions are unchanged from its diesel counterpart and the 525-60E offers the same 3.7m outside turn radius. Maximum lift capacity is 2,500kg, with a 2,000kg maximum load at the full six metre lift height. The machine has been designed to deliver similar cycle times as the diesel telescopic, with no loss of performance. TELE HANDLERS PRAISED FOR EIGHT HOUR SINGLE CHARGE PERFORMANCE