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Design and Implementation of ZeeWeed® MBR Retrofits

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Over the past decade, the application of membrane bioreactor (MBR) technology for wastewater treatment has grown exponentially. Today, most MBR facilities are designed for ammonia and total nitrogen removal; however, many also include the ability to reduce phosphorous biologically or through the addition of coagulant. Many municipalities are facing the challenges of providing adequate wastewater treatment services for growing populations and/or compliance with increasingly stringent permit limits. In many cases, these treatment challenges are compounded by constraints to existing infrastructure, treatment technologies and space available at their plants. Membrane bioreactors are an ideal solution to improve the level of treatment and/or expand available treatment capacity while maximizing the use of existing infrastructure.

The retrofit of conventional activated sludge plants with MBR technology has proven to provide robust performance and is often the single and lowest lifecycle cost solution for upgrading secondary treatment systems. This paper reviews three recently commissioned full-scale plants that have used different strategies to retrofit conventional technology with MBR in order to achieve stringent nutrient discharge limits and/or increase plant capacity, including an 8-MLD Membrane Bioreactor currently under construction in Brandon, Manitoba.

Keywords: MBR retrofit; Membrane bioreactor; ZeeWeed

Document Type: Research Article


Publication date: January 1, 2010

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  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

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