This paper is a case study that discusses the use of cloth media filtration as a pretreatment to ultrafiltration for waste water applications. Covered are the possible reasons for this approach and the performance of a system that filtered the wastewater using an inside-to-outside flow path that eliminates the need for cleaning with an air-scour s...

This paper gives the findings of the pilot study with regards to the sequencing batch reactor (SBR), cloth media filtration (CMF), and ultrafiltration (UF) parameters required to obtain ultra-low phosphorus levels in the plant effluent. In addition, some of the challenges encountered in the study are discussed, along with how these challenges were...

Paper evaluates two years of data from the upgraded Shepherdstown WWTP located on the eastern-most tip of West Virginia that discharges into the Patomac River. The plant uses a special type of membrane bioreactor (MBR) operated in a batch mode, to achieve very low effluent nutrient levels with less carbon and coagulant addition than standard MBRs. ...

When a prominent plastics manufacturer encountered issues with settleability and organics reduction in their wastewater plant's secondary treatment system, they consulted several membrane system providers to determine the feasilbility of using a membrane bioreactor (MBR) to solve the problems. They narrowed the field to two manufacturers, and had ...

This paper details the City of Butler, MO existing low pressure membrane system and its integrity issues. To resolve some concerns, they tested a new membrane in one train and the paper defines how the selected membrane has been able to resolve those issues, meet the Long Term 2 (LT2) Enhanced Surface Water Treatment Rule, and outperform the existi...

The Chesapeake Bay Watershed Initiative (CBWI) of 2010 required many wastewater treatment plants discharging to affected waterways to meet progressively lower effluent contaminant levels. While the initiative's impact was felt most profoundly by municipal plants that now had to meet lower nutrient limits, it also affected many of the area's industr...

This presentation describes how the town of Riverhead, NY, is saving 100 million gallons per year of potable water by reusing its wastewater for landscape irrigation. The existing SBR basins were converted into a unique batch-style membrane bioreactor (MBR) while maintaining capacity and treatment during the upgrade. The design flow increased from ...

This presentation describes the development and startup of a 6,000 barrels per day (bpd) mobile demonstration system for treating wastewater generated by hydraulic fracturing. The system is a cooperative project involving a Houston-based oil company, two universities, a ceramic membrane manufacturer, and a system integrator. Included in the prese...

This presentation will describe two U.S. installations where a modified aluminum oxide membrane is being used to treat two very different waters: surface water for potable use, and wastewater for reuse. This ceramic membrane is ideal for the drinking water application because it has proven that it can last over 20 years without needing repair or re...

The City of Butte, MT had to put in a treatment plant when it found that the existing chlorination system was producing byproducts that exceeded EPA limits. The plant was designed to take advantage of the elevation difference between its reservoir and the City, and the ceramic membrane system was selected because it could handle the higher influent...

In early 2016, the City of Two Rivers, WI began looking at replacing the hollow-fiber ultrafiltration (UF) membranes at their 3.75 MGD drinking water plant. The UF system had been in operation since 2003/2004 and, since then, the membranes had been repaired often and replaced twice due to ongoing fiber breakage and air integrity test (AIT) failure...

While polymeric membranes are used extensively for treating domestic and industrial wastewaters, ceramic membranes have some unique characteristics that make them uniquely suitable for processing challenging waters. Their biggest advantage in these applications is their higher chemical resistance, enabling them to be cleaned more effectively and r...

What do Byesville, OH, Two Rivers, WI, Butler, MO, Garden City, MO, and Amsterdam, MO have in common? They all have drinking water plants that were on the verge of crisis due to fiber breakage in their low-pressure membrane systems. That is, until they took a chance on a membrane that had been used extensively in drinking water plants worldwide b...

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Though 2017 was a wet year for the southwest U.S., drought conditions resumed in 2018 and continue through today [Heim (2021)], resulting in a water shortage that is forcing industries to look for ways to reuse wastewater and rely less on fresh water sources. Two such industries have found creative ways to reuse wastewater in their processes: one b...

Though 2017 was a wet year for the southwest U.S., drought conditions resumed in 2018 and continue through today [Heim (2021)], resulting in a water shortage that is forcing industries to look for ways to reuse wastewater and rely less on fresh water sources. Two such industries have found creative ways to reuse wastewater in their processes: one b...

In 2004, the Village of Byesville constructed Ohio's first microfiltration membrane drinking water plant, designed to treat water from wells inside abandoned coal mines. After five years, the membranes began having integrity issues (fiber breaks), which steadily continued until, in 2014, the membrane trains were replaced with racks containing a un...