An example of an  Rotating Biological Contactor (RBC),
similar, in concept, to the one proposed for Munster:


   
 

Exeter Times-Advocate                                                                               Wednesday, September 26, 2001     

Granton sewer system running smoothly

 
 

By Scott Nixon
TIMES-ADVOCATE STAFF

GRANTON – It may be overdue and over budget, but the Granton sewer project is mostly done.
Lucan Biddulph public works manager Barry Mills told the Times-Advocate last week the system has been running for two months and 65 of the 105 possible sewer connections in Granton have been made. The remaining connections will be made in the next year.
The project, which Lucan Biddulph Mayor Earl French said has been talked about for six years, has seen delays and was supposed to be done two years ago. French said talks of a sewer system began when there were complaints of failing septic beds in Granton.
Originally pegged at $1.9 million, the project’s final cost is about $2.2 million. The municipality received a provincial grant of $895,500.
French concedes the project was “very costly.” Granton residents were charged according to their property frontage.
The first project delay came in the spring of 1999 when Granton resident Charles Hayden requested an individual environmental assessment on his property

 
 
  from the province. While his request was eventually denied, it pushed back the project until 2000.
Further delays came from difficulties getting easements from property owners to run the sewer through their back yards and, finally, the project was put on hold last December when the contractor, Frank Van Bussel and Sons, requested a delay until spring because working through the winter is difficult and costly.
But when work started again in the spring, Mills said things went smoothly and there have been no problems since.
Mills, who took the T-A on tour through Granton, explained there are the west, east and central sewers which collect from the homes. Sewers were dug through backyards because the alternative ---digging through roads--- would have cost more money.
Mills said Van Bussel was responsible for restoring the condition of homeowners’ backyards after the sewer was installed. After that, it’s up to the homeowner to hire a contractor to hook up their home to the sewer system, after which the municipality inspects it.
Once the waste is collected from the homes, it
 

 travels to the treatment plant on Granton Line. There’s also a pumping station, which includes a warning light to indicate if there are any problems.
Bob Thompson, who’s looked after Lucan’s sewage treatment plant since 1994, also looks after the Granton plant. He can monitor the Granton plant from Lucan through a remote, but also visits the Granton plant every day to make sure everything’s working OK.
“Your eyes, your ears, and your nose are a big asset in this business,” Thompson said.
He also has to record daily flows and gather water samples, which he has to send to an accredited lab once a week.
Once the raw sewage enters the plant, it goes through a series of filters and cleaning systems that produce, in Thompson’s words, “near-drinkable water.”
Part of the process involves a 12’ X 30’ rotating biolocical contactor, which begins the treatment.
Later in the process, aluminium sulfate, a phosphorus treatment, is added. The water then passes through another filter and finally through an ultraviolet treatment, which kills E. Coli.
Once it leaves the plant, the water is released in a “dry ditch condition” into the Cook drain.

  Thompson said if you put a glass of tap water beside a glass of water released from the treatment plant you couldn’t tell the difference.
Once the plant opened, Thompson said things went off “without a hitch. It amazed me how well it went.”
French said he’s happy the project has come this far and the system is working.
Now that more than half the connections in Granton have been made, French said he’s received thanks from residents who say the project is long overdue.
French said now that Granton has both water and sewers, he hopes people will view it as a good place to buy a starter or retirement home. He described it as a “bedroom community.”
Although much of the physical work has been done, Lucan Biddulph administrator Ron Reymer said there’s still “a ways to go” for he and his staff, who are working on the financial aspect of the project. Residents can pay for their hookup up front, or get a loan from a bank or have the cost added to their taxes over the next 20 years.
“We’ll be glad when it’s over,” Reymer said.
 

(Highlighting and emphasis added.)
     

Vankleek Hill - has 6 RBCs

   
 

City of Niagra - has 35 RBCs

 

City of Barrie

 
     
 
 
 

Report to Congress
by the Comptroller General of the United States

Activated Sludge Sewage Treatment Plants
vs.
RBC Sewage Treatment Plants

 
 

In May 1975, the Comptroller General presented to the U.S. Congress a report dealing with a program to reduce the costs of wastewater treatment plants that are funded by the government.

The report included a value analysis which compared the costs of an activated sludge process with an rotating biological contactor (RBC) process for a flow of 4.5 million GPD.

The conclusions were that the RBC option would result in capital savings of 44.2% plus annual operation, maintenance and replacement savings of $43,600 per annum.

The report said:

   

"The rotating biological contactor process utilizes oxygen from the air without the need for mechanical aeration mixing as required in the activated sludge process. If rotating biological contactors are utilized, a significant number of process components required in the activated sludge process can be eliminated. These include the aeration tanks, blowers, blower building, and large quantities of piping. In addition, power consumption would be reduced and overall operating costs considerably lowered."

 

 

LINKS:

DYNASAND

TROJAN TECHNOLOGIES Inc.


   

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