November 2012, Vol. 24, No.11

Problem Solvers

Keeping the salmon swimming

PROBLEM: A difficult-to-access section of water supply pipe needed rehabilitation. SOLUTION: A cured-in-place-pipe method relined and reinforced the existing pipe.

Last year, the U.S. Fish and Wildlife Service (FWS) Eagle Creek Fish Hatchery near Estacada, Ore., faced a severe problem. The salmon hatchery’s 900-mm (36-in.) welded steel pipe for its main water supply, located approximately 2.7 m (9 ft) underground, badly needed to be rehabilitated. The pipe operates at 690 kPa (100 lb/in.2) to continuously bring fresh water from Eagle Creek into the fish hatchery.

FWS embarked upon the rehabilitation project in June 2011. Although most of the pipe could be excavated and replaced by open-cut construction, one part was extremely difficult to excavate because of its integration into the main concrete intake structure. Additionally, this section was directly adjacent to Eagle Creek and tied into a sand filtration basin that further limited the access to the pipe section.

Trenchless fix

Because of the limited access and sensitive nature of the project location, an environmentally friendly approach was needed. Michels Pipe Services (Salem, Ore.), along with FWS, determined that NORDIPIPE™, manufactured by SEKISUI NordiTube Inc. (San Clemente, Calif.), would be the best trenchless rehabilitation technology for this pressure pipe requirement. This glass-fiber-reinforced pipe liner has the capacity to restore both the pressure boundary and structural integrity of buried piping systems, as well as provide a corrosion-resistant barrier.

To acheive this fix, the liner material is impregnated with resin; then a pressure vessel inverts the tube and steam cures the resin, creating a statically self-supporting pipe within a pipe. For large-diameter
liners  with thick walls, the typical drum and air inversion steam cure method is replaced with water column inversion, where water and not air is used to invert and hot water instead of steam is used to cure. End seals are used to join the liner to the original pipe.

 

Small window 

The construction window was limited due to the amount of water needed for critical hatchery operations. FWS needed to get this pipe back into working order as quickly as possible to minimize any effect on the salmon.

Because the only access to the section of pipe to be lined was the right-of-way for pipe that was being excavated, Michels Pipe Services had to coordinate closely with the general contractor. The lining contractor began installation of the 94 m (309 ft) of liner at 7 a.m. on June 13, and ended the rehabilitation process with the curing phase by noon on June 14.

The next day lined pipe was pressure-tested and put back into service supplying water to the hatchery. NORDIPIPE™ liners are NSF 61 approved and meet American Water Works Association (Denver) Class IV standards (fully structural).

“The cured-in-place pipeline rehabilitation was quite an impressive process with extremely effective results,” said hatchery manager Larry Telles. “We were especially pleased with the short curing time of the liner resin and the fact that our salmon displayed absolutely no ill effects from the process. We were also deeply impressed by the minimal impact of the procedure on the environment.”


  

Profiting from energy flexibility

PROBLEM: Utilities face the need to reduce operating costs while maintaining water quality services. SOLUTION: A software platform manages a network of electricity users by aggregating their process storage to respond to the real-time needs of the power system.

As electricity costs continue to rise, water and wastewater treatment facilities are faced with the challenge of providing high-quality, reliable water services while reducing operating costs 

 

Introducing the power network

After looking at potential solutions to this challenge, the water and wastewater treatment utility Pennsylvania American Water (Hershey, Pa.) decided to join the ENBALA Power Network® (Toronto). The network connects various facilities with flexible electricity demands to the smart grid to help achieve electrical Grid Balance™, said Ron Dizy, president and CEO of ENBALA Power Networks. 

 

 

Grid Balance is an ancillary service where electricity system operators rely on generators to increase and decrease power generation to match real-time demand. These operators, the independent system operators (ISOs) and regional transmission organizations (RTOs), must maintain a continuous balance between demand and supply to ensure all consumers (commercial, industrial, and residential) have a reliable supply of electricity. 

But operators face challenges of maintaining this balance as an increasing amount of energy comes from intermittent renewable energy sources such as wind and solar, Dizy said. 

"With the evolution of the grid and the increased amount of renewable sources being added, grid operators require innovative solutions,” Dizy said. 

The network balances the electric power system on the demand side, providing electricity system operators an innovative way to integrate more renewable energy to the grid, Dizy explained. ISOs and RTOs pay ENBALA for its service, the company then shares those funds with large-scale electricity users (commercial, industrial, and institutional organizations) connected to the network. These electricity users are paid based on the amount of electricity flexibility they provide to the network. 

Water and wastewater treatment facilities use a large amount of energy, but treatment processes are inherently flexible. “Grid Balance generates an extra revenue stream for the plant and helps offset high electricity costs,” Dizy said. “When a pump is slowed down for a period of time, it decreases its flow, which also represents a decrease in electricity consumption and drop in power. At another time, the pump will be sped up for the same period of time, balancing out the required pump demand. Within a given day, energy consumption is balanced.” 

Other processes where electricity use can be adjusted throughout the day while maintaining necessary treatment levels include aeration blowers and water treatment reservoirs, Dizy said. 

 

Real results of connecting 

Pennsylvania American Water decided to start by connecting one pump at its Shire Oaks Pump Station to the network. The station has an average demand of 1.1 million kWh per month and peak demand of 1650 kW. 

The utility worked with ENBALA engineers to connect the pump and meet all security requirements. The connection required no additional infrastructure other than the local communications panel installed by ENBALA. 

Once connected, the utility specified constraints on the flexibility and availability of its pump’s electricity use so it would not interfere with the quality of the water supply, other equipment, or processes. 

“Each asset in the network has a set of constraints and responds to the Grid Balance requests when available. It is the network effect that makes responding to Grid Balance requests possible without impacting the operating processes of any of the assets in the network,” Dizy said. 

If an asset is not available, it does not receive an operational adjustment request, leaving only available assets to deliver Grid Balance, and asset owners are not penalized for not being able to respond to requests. 

“The great thing about ENBALA is, with the system turned on and lowering our net cost of energy, we don’t even know it is there. It is invisible to our operations,” said Dan J. Hufton, Pennsylvania American Water senior director of production. 

 

Accumulating balance 

The Shire Oaks pump receives real-time requests from the network that are passed along by PJM Interconnection (Valley Forge, Pa.), the region’s electricity system operator. Shire Oaks’ potential is to provide a consistent average of 400-kW Grid Balance to PJM. This can offset 2% to 3% of the station’s total energy bill, according to Dizy. 

Pennsylvania American Water found that the project did not compromise operations. Samples of storage tank water levels while the pump was participating in the network showed that water level was consistently within the utility’s specified predetermined set points. And the station did not experience any abrupt or undesirable changes in water levels, pressures, or flow rates, allowing employees to predict and control station operation. 

Also, the utility’s tests concluded that network equipment did not create a security risk because it conformed to industry best practices and recommendations for securing industrial control systems, according to Dizy. 

Based on Pennsylvania American Water’s results, the utility noted that constraints on pump operations could be loosened by increasing the pump’s variable-frequency drive speed balance. These actions would increase the range and revenue potential of the service, Dizy said. 

Business

IDEX Corp . (Lake Forest, Ill.) recently announced the addition of Trebor International (Salt Lake City) to the business units under Warren Rupp Inc. (Mansfield, Ohio). Trebor International manufactures ultrapure-chemical pumps and liquid heating systems used in microelectronic device fabrication, high-grade chemical processing, and bulk handling of critical fluids for semiconductor microelectronics, solar-panel photovoltaics, and flat-panel displays. John Carter has been promoted to president of Warren Rupp Inc. The team at Trebor, led by general manager Patrick Taylor, will report directly to Carter. 

 

Richard Galloway has joined Atkins (Austin, Texas) as senior vice president in its water and environment group of the company’s water-related engineering practice. Galloway has 35 years of professional experience as a consultant and contractor to state and local governments, agencies, and private-sector clients. 

 

Dow Chemical Co. (Bay City, Mich.) announced plans to build a manufacturing facility for DOW FILMTEC™ reverse-osmosis membranes at the company’s site in Huzhou, China. The proposed facility would deliver to the Chinese market equipment for water desalination and wastewater reuse for potable, nonpotable, and industrial water applications. The facility also would serve as a sourcing point for global demand. It is scheduled to go on-line in 2013. 

 

Jet Inc. (Cleveland), a provider of wastewater treatment solutions, received the Presidential “E” Award for Exports by U.S. Department of Commerce Secretary John Bryson at the White House. The “E” Awards are the highest recognition any U.S. entity may receive for making a significant contribution to the expansion of U.S. exports. The primary criterion for the award is 4 years of either successive export growth or supporting the export growth of others. Ron Swinko, CEO of the company, accepted the award. 

 

Michael McKenna joined Triogen (Goor, Netherlands). McKenna will help provide technical after-sales support across the company’s range of ozone and ultraviolet water treatment systems for the leisure pool and industrial markets. 

 

In-Situ ® Inc. (Fort Collins, Colo.), a provider of water monitoring technology, partnered with Onset Computer Corp. (Bourne, Mass.) for the use of its RDO ® (rugged dissolved oxygen) sensor technology. 

 

Aquatech (Sharjah, United Arab Emirates), a provider in water purification technology for industrial and infrastructure markets, received Frost & Sullivan’s Award for Growth Excellence in the Middle East and North Africa Desalination Plant market. The award highlights the high degree of innovation with products and technologies, and the resulting leadership in terms of customer value, market penetration, and environmental consciousness. Ken Snow joined Brown and Caldwell (Walnut Creek, Calif.) as senior project manager. Snow will work in the Boston office and provide project management leadership on municipal and industrial wastewater and infrastructure and remediation projects in the eastern United States. 

 

Parkson Corp. (Fort Lauderdale, Fla.) is consolidating the operations of its Middle East group into the international division to optimize the delivery of its new treatment technologies to its customer base in other parts of the world. Under the consolidation, the company will take over the duties of the Dubai office. The new unit will be led by Michael Lamminen, and its offices will be located in the firm’s Fort Lauderdale headquarters.