Membrane Bioreactor Filters Without Chemicals

BIO-Cel MeurerMBR membrane bioreactor from Meurer Research
Membrane Bioreactor Filters Without Chemicals

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The BIO-Cel MeurerMBR flat-sheet membrane bioreactor with 0.04-micron pores from Meurer Research provides chemical-free filtration and clean discharge in a small footprint. Producing effluent free of biomass, bacteria and particles, the bioreactor meets California Title 22 and the EU Bathing Water Standard and is suitable for effluent recycling or use with nanofiltration, reverse osmosis, UV and other treatments.

“For the last 10 to 20 years, membrane manufacturers have been trying to figure out a way to cut costs,” says Chris Thiel, director of sales and marketing. “A fouling layer develops on the membrane, whether it’s hollow fiber or flat plate. And to clean that, chemicals have been required. We developed the mechanical cleaning process (MCP), which uses thousands of mineral-filled polyproprolene beads to remove the fouling layer without chemicals.”

The filtration system, available in four models (BC10, BC50, BC100 and BC400), features two UP-150 membranes made of polyether sulfone (PES) and pressure-fused to a woven polyester core that can be backpulsed at up to 2.2 psi without breakage, tearing or ballooning. The modular system enables both new and retrofit plants to be custom designed to meet specific filtration needs, Thiel says.

The module includes membrane cassettes and frames with diffusers. Screened wastewater enters the reactor basin, is treated by a highly concentrated activated sludge process, and flows to the filtration basin, equipped with submerged flexible flat-sheet membrane modules. Suction pulls permeate through the continuously air-scoured pores, and clean effluent is discharged.

The concentration of bacteria in the aeration process speeds up biodegradation, allowing for a smaller aeration tank and eliminating settling basins. Computerized control provides automatic operation, reliable output, and cost-efficiency.

The BC400 provides up to 4,300 square feet of membrane area and measures 62 inches long by 46 inches wide by 109 inches tall. In some applications the system takes about half the space of other membrane modules, according to Thiel.

The continuous cleaning process also results in minimal maintenance and downtime. “When you use chemicals, you have to take the membranes out of service, which means you need more membrane area to compensate for what you’re losing,” Thiel says. 303/279-8373; www.meurermbr.com.



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