2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

Partnering Events:

TechConnect Summit
Clean Technology 2008

Innovative Design Yields High-performance, Low-Energy Wastewater Treatment & Reuse Process

L.E. LeBru, C.R. Morgan
Parkson Corporation, US

Keywords:
membrane, bioreactor, wastewater, water, reuse

Abstract:
Membrane bioreactors (MBRs) are accepted in the municipal and industrial wastewater market as providing high quality effluent. The majority of the installed systems in the United States to date use immersed systems where the membranes are submerged either directly in the bioreactor or in a separate membrane tank. One key reason immersed systems were developed was to avoid the high energy cost of pumping needed to maintain proper cross-flow velocities for external or side-stream membrane systems. While side-stream technology has been used for years in many industrial applications and has proven to provide high quality liquid/solid separation, the high cost of operation has limited its practical use in membrane bioreactor applications. This paper discusses a new technology which uses two-phase flow to provide a cost-effective and proven way to apply external, or side-stream, tubular membranes to membrane bioreactors. Using a simple airlift to sustain the cross flow velocity and turbulence required, high membrane flux and permeability can be maintained to produce an accessible, external tubular membrane bioreactor system. These benefits include reduced space requirements, proven tubular membranes, sustainable performance, low operating costs, and simple and safe operation.


Nanotech 2008 Conference Program Abstract