The case study about Athens, Tennessee, that we've been talking about recently has garnered a lot of attention. This month, American Infrastructure magazine discusses Athens in its article "Operation Renovation at Oostanaula."
As you know, Athens replaced part of its failing gravity system with an E/One pressure sewer system, with incredible results. Click here to read the story from American Infrastructure.
Monday, November 23, 2009
Tuesday, November 17, 2009
Air Release Station Added to Product Line
E/One Sewer Systems has added an Air Release Station to its product lineup.
Air release stations are often required on large sewer systems. When the main is submerged under a static head, air release valves are normally located at high points in the system.
The tank is made of HDPE, the same material used on E/One's D-Series and many W-Series grinder pump tanks. The open-bottom design allows any odors to be absorbed into the soil bed. Height adjustments can be done in the field. The valve is a combination air valve for wastewater, 2" NPT and includes a drain/relief valve.
Drawings, specs and installation instructions are available on E/One's web site.
Air release stations are often required on large sewer systems. When the main is submerged under a static head, air release valves are normally located at high points in the system.
The tank is made of HDPE, the same material used on E/One's D-Series and many W-Series grinder pump tanks. The open-bottom design allows any odors to be absorbed into the soil bed. Height adjustments can be done in the field. The valve is a combination air valve for wastewater, 2" NPT and includes a drain/relief valve.
Drawings, specs and installation instructions are available on E/One's web site.
Monday, October 26, 2009
E/One Grinder Pump Case Studies in Pumps & Systems Magazine
The current issue of Pumps & Systems magazine features a special section devoted to grinder and chopper pumps. This section features and article entitled, "Grinder Pump Driven Pressure Sewer Systems." The article highlights two communities that use E/One grinder pumps:
Athens, Tennessee
Athens, which we talked about here a few months ago, suffered from extreme infiltration problems. An aging gravity sewer system could not handle the town's wastewater flow, and rainwater that bypassed the pump station made the situation worse.
Instead of building a new gravity sewer system, Athens decided to use a pressure sewer system using E/One grinder pumps. Installation was less disruptive, saving on construction costs. The reduced flow into the wastewater treatment plant resulted in an annual (treatment) savings of more than $89,000.
Marion, Massachusetts
The New England coast poses several geo-technical challenges: sloping terrain, rock, high groundwater and sandy soil. When Marion needed to expand its sewer system, pressure sewer was the obvious choice.
Pressure sewer service to the 455 homes saved 40 percent over the cost of the proposed gravity system -- and was completed in half the time of the gravity sewer proposal.
Additional Case Studies
To read more articles about communities who have successfully used E/One grinder pumps, visit the Case Studies and Technical Reprints sections on E/One's web site.
Athens, Tennessee
Athens, which we talked about here a few months ago, suffered from extreme infiltration problems. An aging gravity sewer system could not handle the town's wastewater flow, and rainwater that bypassed the pump station made the situation worse.
Instead of building a new gravity sewer system, Athens decided to use a pressure sewer system using E/One grinder pumps. Installation was less disruptive, saving on construction costs. The reduced flow into the wastewater treatment plant resulted in an annual (treatment) savings of more than $89,000.
Marion, Massachusetts
The New England coast poses several geo-technical challenges: sloping terrain, rock, high groundwater and sandy soil. When Marion needed to expand its sewer system, pressure sewer was the obvious choice.
Pressure sewer service to the 455 homes saved 40 percent over the cost of the proposed gravity system -- and was completed in half the time of the gravity sewer proposal.
Additional Case Studies
To read more articles about communities who have successfully used E/One grinder pumps, visit the Case Studies and Technical Reprints sections on E/One's web site.
Monday, October 12, 2009
E/One Debuts New Grinder Pump Stations at WEFTEC
WEFTEC is going right now at the Orange County Convention Center in Orlando, where E/One is debuting two new large-capacity grinder pump stations:
WH471 & WH472 Grinder Pump Stations
The WH471 and WH472 are new additions to E/One's W-Series product line. The station is an open-wetwell design that boasts a 476-gallon capacity. The tank is made from HDPE and can have one (WH471) or two (WH472) Extreme Series grinder pumps. It's an ideal choice when extra capacity is required.
WH482 Grinder Pump Station
THe WH482 is the other new addition to E/One's W-Series product line. The station is also an open-wetwell design, but offers 486 gallons of capacity. The tank is made from HDPE and is a duplex (2 pumps) grinder pump station. The WH482 can accommodate up to four Extreme Series grinder pumps.
Both grinder pump stations are expected to be available in December 2009. More information about these grinder pump stations is available on E/One's web site at http://www.eone.com/sewer_systems/extreme/products/grinderpumps/index.htm
WH471 & WH472 Grinder Pump Stations
The WH471 and WH472 are new additions to E/One's W-Series product line. The station is an open-wetwell design that boasts a 476-gallon capacity. The tank is made from HDPE and can have one (WH471) or two (WH472) Extreme Series grinder pumps. It's an ideal choice when extra capacity is required.
WH482 Grinder Pump Station
THe WH482 is the other new addition to E/One's W-Series product line. The station is also an open-wetwell design, but offers 486 gallons of capacity. The tank is made from HDPE and is a duplex (2 pumps) grinder pump station. The WH482 can accommodate up to four Extreme Series grinder pumps.
Both grinder pump stations are expected to be available in December 2009. More information about these grinder pump stations is available on E/One's web site at http://www.eone.com/sewer_systems/extreme/products/grinderpumps/index.htm
Wednesday, October 7, 2009
E/One Exhibiting at WEFTEC
If you're attending WEFTEC next week in Orlando, be sure to visit E/One at exhibit #4345 in the B Hall. We'll have a number of new products on display, including new tanks and a new pump. Our sales staff will be available to answer questions about our products and discuss any projects that you might have.
WEFTEC takes place October 10-14 at the Orange County Convention Center in Orlando. Visit http://www.weftec.org/ for more information.
WEFTEC takes place October 10-14 at the Orange County Convention Center in Orlando. Visit http://www.weftec.org/ for more information.
Monday, July 27, 2009
Homeowners: Do you have an E/One grinder pump?
E/One is looking for homeowners who have E/One grinder pumps installed at their homes. Whether they’re 6 months old or 26 years old, we’re interested in your opinions and experience. Please send an email to eone@eone.com with your name, city/state and the subject line “Homeowner Survey Signup.” We will NOT sell your email address to anyone – all contact information collected is solely for the purpose of knowing who uses our grinder pumps.
Wednesday, July 8, 2009
Sewer System Technology: Vacuum Sewer vs Pressure Sewer
At first thought, a vacuum sewer system sounds like an easy, convenient alternative to a gravity sewer system. Vacuum sewers require shallow trenches, small mains, and can be used in flat or rocky areas. No individual pump stations are required at each home. But they aren’t ideal for every situation or every location, and require regular maintenance.
How a Vacuum Sewer System Works
Vacuum systems use differential air pressure to move wastewater. The system consists of one or more vacuum stations, collection system piping, valve vaults and vacuum interface valves. The sewage is transported in small diameter pipes placed at variable grade and deflection underground. The wastewater is drawn to the station and pumped to a wastewater treatment plant. Vacuum interface valves regulate the entry of wastewater and air from the valve vault into the collection system piping.
Vacuum System Disadvantages
There are a number of disadvantages to vacuum systems. First, while the mains are small and require shallow burial (just below the frost line), they are limited to approximately 20 feet of head. The sewer lines must have a specific profile of pockets or running traps, so installation requires the same attention to grade as a gravity sewer main.
The biggest disadvantage is system size. The central vacuum stations require a large capital investment, so a system for less than 50 homes is not economically feasible.
Pressure Sewer Systems
Pressure sewer systems use pump installed at each home to grind wastewater and move it to the sewer system. Pressure sewer mains are also small-diameter pipes that are buried just below the frost line, but follow the contour of the land – therefore, they don’t require the pockets or running traps that vacuum systems need. Head is limited by the capabilities of the grinder pump installed at the home (185 ft for E/One pumps), allowing for uphill pumping.
Small systems are also economically feasible. A few homes – or even one home – can connect to the sewer system at a reasonable cost. E/One’s grinder pump does not require preventive maintenance and boasts an average mean time between service calls of 8 to 10 years. Visit the Case Studies section of E/One’s web site to read more about communities that have used E/One Sewer systems.
How a Vacuum Sewer System Works
Vacuum systems use differential air pressure to move wastewater. The system consists of one or more vacuum stations, collection system piping, valve vaults and vacuum interface valves. The sewage is transported in small diameter pipes placed at variable grade and deflection underground. The wastewater is drawn to the station and pumped to a wastewater treatment plant. Vacuum interface valves regulate the entry of wastewater and air from the valve vault into the collection system piping.
Vacuum System Disadvantages
There are a number of disadvantages to vacuum systems. First, while the mains are small and require shallow burial (just below the frost line), they are limited to approximately 20 feet of head. The sewer lines must have a specific profile of pockets or running traps, so installation requires the same attention to grade as a gravity sewer main.
The biggest disadvantage is system size. The central vacuum stations require a large capital investment, so a system for less than 50 homes is not economically feasible.
Pressure Sewer Systems
Pressure sewer systems use pump installed at each home to grind wastewater and move it to the sewer system. Pressure sewer mains are also small-diameter pipes that are buried just below the frost line, but follow the contour of the land – therefore, they don’t require the pockets or running traps that vacuum systems need. Head is limited by the capabilities of the grinder pump installed at the home (185 ft for E/One pumps), allowing for uphill pumping.
Small systems are also economically feasible. A few homes – or even one home – can connect to the sewer system at a reasonable cost. E/One’s grinder pump does not require preventive maintenance and boasts an average mean time between service calls of 8 to 10 years. Visit the Case Studies section of E/One’s web site to read more about communities that have used E/One Sewer systems.
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