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Technical Resources
Graphics Library
Technical Resources Files
MBR Papers
Flat-Plate Microfiltration Membrane Bioreactor Designed for Ultimate Nutrient Removal
Increasing concerns for sensitive receiving water are expected to drive effluent nitrogen
(N) and phosphorus (P) limits to exceptionally low levels for many wastewater treatment
plants throughout the U.S (< 0.1 mg TP/L and < 3-5 mg TN/L). Meeting these limits will
require a new generation of effective treatment strategies to control both soluble and nonsoluble
discharges. This paper will discuss the development and the evaluation of a flatplate
microfiltration membrane bioreactor (MBR) technology designed for highly
effective nitrogen and phosphorous removal using combined biological and chemical
processes. Since 1990, approximately 1,500 wastewater treatment plants worldwide have
successfully utilized this MBR technology to consistently produce water that exceeds
most reuse quality standards.
Such MBR configurations have been demonstrated to achieve very low nutrient
concentrations, in part because membrane systems provide a nearly complete removal of
effluent solids and the nutrients they contain. Such systems provide the added benefits of
nearly complete removal of bacterial pathogens, and even some viruses. These
characteristics make the MBRs ideal
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Long Term Operating Experience with Submerged Membranes -Cranfield MBR4
S. Churchouse and K. Brindle MBR Technology, Aquator House, Bradford Road, Trowbridge, Wiltshire, BA14 9AX. United Kingdom: +44 (0)1225 757 800. steve.churchouse@mbrtech.com; keith.brindle@mbrtech.com. Web: www.mbrtech.com Abstract Membrane bioreactors have found increasing application for effluent treatment over the past few years and yet the technology was almost unknown in commercial application 10 years ago. The first applications were all small scale and generally aimed at difficult to treat effluents or locations where high quality effluent was a necessity. In 1992 membrane and system costs were still prohibitively high for larger scale application. Since that date efforts by membrane system suppliers and increasing demand from end users has resulted in substantial reduction in costs allowing large scale installations to be undertaken. This paper presents some of the longer term operating data from some of these plants, their analytical performance and some examples of the operation and maintenance issues that have been encountered and addressed. In particular data will be presented on actual chemical cleaning requirements and the number and causes of membrane failures to date.
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Membrane Bioreactors: A Case Study of Point-Of-Use Wastewater Reclamation Using Flat-Plate Membrane Technology
A new membrane bioreactor (MBR) wastewater reclamation facility (WRF) was commissioned
in September of 2003 north of Atlanta, GA at The Hamptons Golf Club Community.
Architecturally designed to resemble the golf course clubhouse, The Hampton Creek WRF
provides wastewater treatment for the 514-acre property where the treated effluent is used for
golf course, lawn, and ornamental landscape irrigation. This paper explains the selection criteria
and rationale for the MBR technology utilized, the plant design, and the resulting plant
performance.
Utilizing Kubota submersible flat-plate membranes under gravity-flow operation, The Hampton
Creek WRF is designed to treat 1.0 MGD at full capacity to achieve effluent qualities of less than
3 mg/l BOD, less than 2 mg/l TSS, and less than 0.5 NTU turbidity. The Hampton Creek WRF
currently treats an actual average daily flow (ADF) on the order of 0.1 MGD, though the facility
is currently permitted to handle an ADF of 0.275 MGD. The new WRF allows The Hamptons to
reduce the volume of potable water consumed for irrigation and is proving to be a cost-effective
means of reclaiming wastewater at the point of use.
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Understanding Membrane Performance in MBR Applications Through Biohydraulics
Since the early 1990s, submerged membrane bioreactor (MBR) technologies have been reshaping wastewater treatment industries around the world and creating new reuse opportunities through decentralization and plant upgrades. In fact, in the US alone, there are now hundreds of operating MBR plants and by many accounts, more than 4,000 installations worldwide (Kennedy and Churchouse, 2005). With the maturation of MBR technology over the last decade, it has become increasingly apparent that an overall system approach is necessary to designing and operating a successful MBR plant. Assuming adequate pre-treatment, this type of approach accounts for the interdependency between control strategies, plant hydraulics and biological processes. This interdependency is referred to as biohydraulics. To understand the principles of biohydraulics, it is important to note that all submerged membranes have a biofilm that must be properly managed using a variety of design and operational techniques.
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World Water -US Casinos place their bets on MBRs
US casinos place their bets on MBRs
The combined requirements of a small footprint and simple operation has prompted several casino owners in the
USA to opt for MBRs in selecting new WWTPs. Hiren K Trivedi, technical manager at Enviroquip, presents three
case studies and describes the technology employed.
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