This presentation discusses the relief efforts for Banda Aceh to repair their potable water supply. Covered are the shipment of a reverse osmosis system and the regulations for quality testing. The presentation then covers a membrane system integrity method using water soluble dye...

Paper summarizes the largest retrofit of conventional granular media filters with low pressure membranes in the world. City of Thornton, CO, conducted pilot testing of five microfiltration MF) or ultrafiltration (MF) membrane systems for a retrofit of membranes into a conventional granular media surface water treatment plant. Subsequently a UF sys...

Paper presents technologies used to chemically treat RO systems and prevent scaling. Topics include methods to remove suspended solids and colloidal material, control methods to prevent biofouling and scaling by sparingly soluble salts. Discussion includes theory, thermodynamics and kinetics of crystallization of typical scale forming salts, such ...

This paper presents recent pilot test results at four different locations showing substantial improvements on settled and coagulated water sources while providing permeate quality that meets current and proposed regulatory guidelines. Pilot studies described were performed with Zenon Membrane Solutions ZeeWeed 1000 product....

ZeeWeed? membranes are used in a variety of MBR applications from small package systems to large wastewater treatment plants. This paper includes product information and a look at innovation in terms of energy efficiency....

This PowerPoint describes the expansion of the Freedom Plant using submerged ultrafiltration membrane systems....

The presentation describes GE's approach to complying with the guidance provided in the USEPA membrane guidance manual as part of the Long Term 2 Enhanced Surface Water Treatment Rule (LT2). The presentation provides details of GE W&PT's approach to direct integrity testing and information on flow regime, ALCR, VCF and contact angle specific to GE...

Overview of membrane applications for wastewater reuse including membrane bioreactors and tertiary filtration....

Membrane Bioreactor basics and a comparison between hollow fiber and flat sheet. Introduction to terminology used in describing the MBR systems and characterizing performance in WWTP applications....

The results of three years of UF pilot testing as pretreatment to RO for desalination is presented....

This presentation covers trends in MBR energy consumption by comparing the past, present, and future of this technology. Some of the parameters discussed include primary clarifiers, air blowers, hydraulic profile: and mixed liquor cascades into the membrane trains....

This PowerPoint presentation reviews the General Electric ultrafiltration and membrane bioreactor facilities in Virginia and the surrounding area....

This PowerPoint gives GE's perspective on Immersed vs. Pressurized for Low Pressure Membranes....

Discusses key drivers for use of MBR in O&G treatment, comparison with conventional treatment, design issues associated with MBR, and existing application at refinery....

Membrane manufacturers offer both pressurized and immersed membrane products for water treatment, but how does one select the most appropriate membrane type for a given site and application? In this presentation, case studies for a 30 MLD pressurized WTP and a 60 MLD two stage immersed WTP will be used to discuss the differences between the two me...

The presentation overs RO Design for treatment of brackish groundwater for Bonita Springs Utilities in Florida. It provides the schematics of both lime softening and RO process at the plant. Some of the detailed design data is included in the presentation....

The use of membrane systems in municipal applications can be divided between new green field plants and retrofit of existing conventional filtration facilities. Both types of construction have their benefits and drawbacks depending on the application, site conditions and age of the existing infrastructure. Using a retrofit approach can be very bene...

For low-pressure membrane systems, one of the key design considerations involves where the waste from the membrane system will be sent and how it will be treated. For a cost effective low-pressure membrane system, the recovery is typically limited to 95-97% recovery. A 2-stage membrane system may increase the overall plant recovery to greater than...

MA State regulations stipulate that membrane filtration systems must pilot surface water sources to prove overall performance and treatment efficacy. This study shows the successful piloting of ultrafiltration (UF) for the City of Salem Water Treatment Facility Upgrade. The raw water supply exhibits seasonally high concentrations of iron and manga...

This paper presents a firsthand account of how water quality and operational challenges have been addressed to improve plant reliability. The overall methodology to address each challenge, including treatability and monitored data, will be presented. ZLD facilities present unique challenges since any constituents that enter the facility in the untr...

Electrodialysis (ED) processes require the application of an electric field in order to drive the migration of ions and cause demineralization. The conventional approach is to utilize metal electrodes (stainless steel for the cathode and noble metals for the anode for ED, and noble metal electrodes for electrodialysis reversal EDR) and perform wat...

This article presents the results at the Lorne Park Water Treatment Plant (WTP) in Mississauga, Ontario, Canada of the performance testing that was conducted and lessons learned for future membrane performance testing. Once the Lorne Park WTP was fully commissioned, the membrane system had to be tested in accordance with the pre-selection documen...

This paper and associated presentation explores these areas of regulatory discretion under the Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) membrane regulatory framework, discussing the impact of different approaches both qualitatively (i.e., from a policy perspective) and quantitatively (i.e., using a sensitivity analysis applied t...

Challenge test data from both loose ultrafiltration (UF) membranes, where the virus log removal value (LRV) is not correlated with LRV calculation model from the Membrane Filtration Guidance Manual (MFGM), and tight UF membranes, where a LRV calculation model can reliably be used to predict virus LRV, are presented....

Pilot study of an MBR/RO system studying the effectiveness of various pretreatment methods....

This paper shares data collected over five years from more than 10 MBR facilities in North America, Europe and Australia to offer a benchmark of the long term ability of full scale MBR installations to provide high levels of microbial removal. The facilities that were sampled all used ZeeWeed UF membranes, selected to include varying membrane ages,...

A new hybrid Membrane-Aerated Biofilm Reactor (MABR) can be a critical component of an energy-neutral wastewater treatment flowsheet. The MABR process offers the benefits of biofilm reactors while efficiently transferring oxygen with low energy input. The oxygen transfer capabilities of the new MABR product were determined using clean water re-aera...

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A tremendous amount of pressure is put on municipalities to provide higher-quality effluent within increasingly constrained capital and operating budgets - they are required to do more with less. Wastewater treatment industry stakeholders should strive to understand and prove the capabilities of technology so as to enable the implementation of the ...

Brine management is becoming a necessity for many communities across the US. Additional technologies can be utilized to treat the concentrate from exisiting systems. These technologies allow for increased production flow and reduction of waste disposal volumes and costs. This presenation will give examples of additional equipment has been designe...

The extensive network of NEWater plants in Singapore use RO to produce high quality water for the semiconductor industry from municipal wastewater. They also fill an increased need for drinking water. In conventional NEWater plants, recovery is limited to 75-80% by the supersaturation of calcium phosphate and iron in the concentrate. When tail memb...

Concentrate management is a key issue for the use of reverse osmosis (RO) technology. Reducing the amount of RO concentrate is critical for all inland RO applications. The Flow-Reversal RO technology employs conventional RO equipment with 2 unique functions to improve recovery: Flow-reversal and Block Rotation. This is a continious process that d...

Treatment processes almost always involve Reverse Osmosis (RO). RO provides the physical barrier needed to remove multiple contaminants, facilitate regulatory compliance, and over the years, has gained the trust of engineers, operators, and consumers. Conventional RO technology effectively removes dissolved solids, micro-molecules, and pathogens, b...