landiaworld.com ENGINEERED TO LAST No. 406 – Mixers Impeller blade upgrade Dec 2017 The US-based Triangle wastewater treatment plant is replacing mixers with fibreglass impellers with Landia mixers that have solid stainless steel impellers. At the Triangle Wastewater Treatment plant in Durham County, North Carolina, fibreglass- bladed mixers have gradually been replaced with stainless steel versions. In addition to 70% of its intake being industrial wastewater, Triangle WWTP also has to handle the large fluctuations in flow from the huge 50,000 weekday workforce influx at nearby Research Triangle Park, to just 6,000 local residents on weekends, when flows are appreciably slower. Joseph R. Pearce, deputy director for Durham County’s Engineering and Environmental Services Dep

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