A portion of the London Ontario Oxford Pollution control plant was retrofited from conventional activated sludge to a membrane bioreactor (MBR) plant. Key operating and design factors for membrane life are variations in feed flows and fluxes. Mixed Liquor Suspended Solids (MLSS) have practical limits to maintain membrane life....

Cartier Regional Water Headingly WTP in Canada makes potable water from a river surface water source using ultrafiltration (UF) and reverse osmosis (RO). This is an Integrated Membrane System (IMS). Removal of Natural Organic Matter (NOM) is important for taste and oder control....

This paper discusses the pathogen removal by several different MBR systems with varying membrane materials, pore sizes and membrane geometries. Impact of membrane breach on passage of pathogens in MBR is also discussed in detail along with the operational performance of the MBR-RO train observed in few different studies across the country. The pa...

In potable reuse, reverse osmosis (RO) is important for system-level salinity management and as a pathogen barrier in the treatment train. Scaling is a key driver of cost for RO systems because it increases energy use and leads to more frequent cleaning and replacement of membrane elements. Phosphate-induced scaling in particular has been identifie...

For inland reverse osmosis (RO) systems, brine disposal is often difficult and costly, and there is significant interest in increasing recovery and reducing brine volumes. The City of Buckeye, AZ owns brackish wells that have trace amounts of arsenic, nitrate, and various metals, and is considering RO treatment for these wells. Stantec performed a ...

For inland reverse osmosis (RO) systems, brine disposal is often difficult and costly, and there is significant interest in increasing recovery and reducing brine volumes. The City of Buckeye, AZ owns brackish wells that have trace amounts of arsenic, nitrate, and various metals, and is considering RO treatment for these wells. Desktop modeling pre...

Stormwater in urban watersheds is often contaminated with suspended solids, oil and grease, and various metals, and ceramic membranes may offer a robust option for treating all of these. In this study, an active stormwater treatment process consisting of ceramic ultrafiltration (CUF) with a solids contact loop followed by oxidative filtration was d...

Stormwater in urban watersheds is often contaminated with suspended solids, oil and grease, and various metals, and ceramic membranes may offer a robust option for treating all of these. In this study, an active stormwater treatment process consisting of ceramic ultrafiltration (CUF) with a solids contact loop followed by oxidative filtration was d...

This presentation presents the progress and applications of MBRs which provides the benefit of biological treatment process in a compact footprint and solids liquid separation for a high-quality effluent. In this paper, lessons learned and challenges from design and operation of MBR plants are presented. MBRs provide the pretreatment required for o...

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