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Public concern over health and the environment combined with the increased requirement for municipalities to address
water demand through the reuse of wastewater effluent have created a need for innovative technologies that can generate
high quality effluent at an affordable cost. Clean water availability has become a significant concern for land
development and growth in many parts of the world. Reclamation and reuse of wastewater are the solutions to reduce
water costs and maximize the use of existing infrastructure in urbanized regions. In order to do so, it is important
to use technologies which ensure public health protection, are reliable and cost effective to own and operate.
Recent developments in membrane technology have allowed for the use of reliable processes to produce reuse water.
In particular, the combination of membranes with the activated sludge process has redefined basic sewage treatment,
optimizing the biological treatment operation and yielding a treated effluent that is ideal for reuse. With the
ZeeWeed® immersed membrane bioreactor process, it is possible to combine
wastewater treatment and effluent reuse in a single process. Alternately, ZeeWeed® membranes can also be applied
in a tertiary treatment application that provides an additional bacterial and viral barrier while providing permeate
that is suitable for RO treatment. The presentation will discuss a number of key design
considerations for MBR's and tertiary membranes in water reuse such as pre-treatment, flux selection, bioreactor
design, energy conservation, membrane cleaning and recovery. Information from existing facilities will be used to
illustrate various design approaches. Operational data will also be included to demonstrate performance capabilities
of these systems.
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