Clarification

Walker Process Equipment > Automatic Condensate Removal System

US Patent No. 6,926,022

The Automatic Condensate Removal System developed and patented by Walker Process is an innovative and effective evacuation system for oil reservoirs that allows release of water automatically. This device frees operators from the task of manually opening valves to check for and remove any accumulation of water in an oil reservoir.

Condensation forms when the temperature of air falls below the dew point. Equipment in a water or wastewater treatment facility operates in a naturally high-humidity environment with temperature variations that cause condensation. Any moisture that forms within a sealed oil chamber must be removed to prevent contamination of the lubricant and corrosion of the gears and bearings.

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CambridgeWaterTechnology > Town of Concord WWTP - CoMag™

Concord, Massachusetts

The Town of Concord, Massachusetts (Concord) operated under a National Pollutant Discharge Elimination System (NPDES) permit that had an interim seasonal phosphorus limit of 0.75 mg/L. The Massachusetts Department of Environmental Protection and the United States Environmental Protection Agency (USEPA) has issued a new permit with a seasonal phosphorus limit of 0.2 mg/L.

The plant's existing phosphorus treatment - the addition of alum prior to the secondary clarifiers - was not expected to meet the future permit limits. Engineers evaluated multiple configurations of processes (CoMag™, dissolved air flotation, sand filters, and membrane biological reactors or MBRs) to help Concord select an option that would provide process flexibility and reliability on the space-limited site. A combination of evaluation criteria was used to screen the alternatives that merited further evaluation. After an 18-month trial of the CoMag™ process, the Town of Concord concluded that CoMag™ was the optimal solution.

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CambridgeWaterTechnology > Town of Sturbridge POTW - BioMag™ and CoMag™

Sturbridge, Massachusetts

Sturbridge, Massachusetts has historically suffered from periodic blooms of filamentous bacteria that have caused bulking in the secondary clarifiers of their three activated sludge package plants. The elevated clarifier solids loadings during high flow events have often caused excessive backwash cycle times of their sand filter, and occasional diversion of excess flow to a neighboring POTW. The Town's need for additional treatment capacity in a highly constricted footprint, coupled with tighter permits for BOD, TSS, total nitrogen and phosphorus, created the need to upgrade the wastewater treatment plant.

The Town's initial solution was to install a membrane bioreactor (MBR) to achieve the required limits on contaminant removal and deliver the additional capacity needed without expanding the footprint of the plant.

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