New Technology Reduces Energy for Biological Treatment by 25 Percent

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GE introduced LEAPprimary, a primary treatment technology for use with GE’s ZeeWeed membrane bioreactor (MBR) and LEAPmbr systems. LEAPprimary reduces overall energy usage, costs and physical space requirements by combining separation, thickening and dewatering of primary wastewater solids into one unit. It replaces conventional clarification and fine screening in a typical MBR plant.

LEAPprimary offers high removal of total suspended solids (50 to 70 percent) and biochemical oxygen demand (25 to 40 percent), and the removed solids can be dewatered to 20 to 30 percent dry matter, minimizing handling costs. Energy usage for biological treatment is reduced because solids and organic material are removed prior to secondary biological treatment. The dewatered residual product also enables energy recovery, as it is rich in organics and can be used in anaerobic digestion, incineration or other processes that convert the organics in wastewater to energy.

Overall cost savings are achieved because the technology replaces multiple unit operations and the reduced organic load results in smaller biological reactors and blowers. The enhanced influent solids screening also helps extend ZeeWeed MBR membrane life. LEAPprimary fits into as little as one-tenth the space required by conventional technology and is suitable where site availability is limited or where land can be better used for other processes or for expansion.

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