HydroWorld: Halifax Water generates power from a 32-kW in-pipe small hydroelectric system

Via: HydroWorld

Halifax Regional Municipality of Nova Scotia, Canada, is the first Canadian city to use an in-pipe hydroelectric generation system within a pressurized water distribution pipeline.

Flow-to-Wire Rentricity Inc. in-pipe hydroelectric system

Halifax Regional Municipality of Nova Scotia, Canada, is the first Canadian city to use an in-pipe hydroelectric generation system within a pressurized water distribution pipeline, according to Halifax Water. On Nov. 13, a 32-kW generating system within a drinking water distribution control chamber for Halifax Water began providing power.

Stakeholders for the Halifax project hope the system will power about 30 homes and produce US$29,000 in revenue annually. Officials said the project cost US$443,000 and Halifax Water; Denver, Colo.-based Water Research Foundation and the provincial government provided the funding.

Halifax Water serves the municipality’s 355,000 residents. The regulated municipality contracted Rentricity Inc., a New York-based renewable energy company, to install the in-pipe system that is rated “safe for drinking water.” The device’s viability for placement in a system from which people consume drinking water is based on Canadian and international safety standards.

According to Rentricity the company designs and installs Flow-to-Wire, their trademarked, unique energy recovery system. “The system harnesses excess pressure within water mains and uses it to generate clean electric power,” said the company. “A single Flow-to-Wire system produces between 30 and 350 kW of clean, renewable, electricity that can then be sold back to the grid.”

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Robots and Divers Cleanup Reservoir in Prince Albert as boil water order continues

CBC News, 22 February 2012

Divers are set to jump into the reservoirs of Prince Albert, Sask., as part of a plan to clean the city’s contaminated water supply and end a weeks old boil water directive.

It has been 19 days since harmful microorganisms were detected in the water supply and some 40,000 residents of the city and nearby rural areas have had to boil water for consumption.

The water was contaminated when a valve failed, allowing water that was not ready for distribution into the supply.

On Wednesday, the city said divers would be deployed to clean reservoirs — a move designed to speed up the restoration process.

“The cleaning of these reservoirs represent step three of the system cleaning plan,” the city said. “It was originally expected that these reservoirs could be drained and cleaned individually, but due to the length of time it will take to replenish the reservoirs, it is considered more timely to utilize the divers.”

The reservoirs are located on Marquis Drive and 2nd Avenue West.

The city is also waiting for provincial water officials to approve, or amend, their plans.

“Progress continues to be made in the plan to restore the water system back to normal,” the city said.

The city was also expecting to shut down the water treatment for 12 hours on Thursday, although supplies will still flow from existing reservoirs.

Officials said they are nearing a crucial time — spring runoff — and want to be ready for a change in the condition of the raw water supply.

“Spring is an important deadline for us because the ice melt has an impact on the quality of the river water,” Robert Cotterill, the city manager, said Wednesday. “We want the plant operating at the fullest capacity possible before this occurs.”

According to the city, health officials have not detected any giardia or cryptosporidium in people, based upon samples sent in by medical clinics for Prince Albert and area residents.

Despite that, the emergency boil water order remains in effect, which especially applies to the use of water for drinking, brushing teeth or washing dishes.

The Canadian Press, 16 February 2012

PRINCE ALBERT, Sask. – Specialized robotic equipment is being used to clean a reservoir in a northern Saskatchewan city, where residents have been boiling their water for nearly two weeks.

The robot is clearing sediment from Prince Albert’s River Street reservoir as part of the city’s plan to get the water supply back to normal.

The robot is being used because the reservoir is part of the distribution system and can’t be drained.

Two other reservoirs still need to be cleaned before the last step, which is flushing the lines that go to homes.

A boil water advisory was issued Feb. 3 because of problems at the water treatment plant and an emergency boil order followed on Feb. 7.

An official says the cleanup plan still needs to be approved by the province and it could be another three weeks before the boil order is lifted.