Saturday, March 24, 2012

Leachate Collection and Treatment Facility Gets City Landfill Site and Student Thesis

Locals will be pleased abut new invetsment in environmental protection measures at the Merrick landfill site, as in the quotation which follows:



NORTH BAY, US - Engineering plans for a leachate collection and treatment facility at the city's Merrick landfill are ready to be drafted after council approved a $1.7 million expenditure during its March 5 meeting.


"Once completed, these plans will be presented to the Ministry of Environment for comment. We expect that to be completed by the end of the summer and hope to be able to tender out the construction of the project by late fall," said North Bay's manager of environmental services John Severino.




>
>


It is expected the leachate treatment facility will be operational by the spring of 2014.


The leachate treatment system has been designed by Conestoga Rovers and Associates, with input from Queen's University students who have been actively studying the city's landfill site and estimating future waste management needs.


"We actually have students at Queen's doing their thesis on our site," said City engineer Alan Korell, "and the National Research Council has put money in as well."


Total costs of this project have been budgeted at $5 million, money well spent according to Korell. He says the landfill site, "is the city's biggest opportunity to make a positive impact on the environment."


Severino says the system the city has chosen allows for the treatment of the liquid seepage so it can be directly returned to the environment. "It is also a flexible system in order to address any future concerns and is part of the whole Green Plan for the city."


The Merrick landfill, opened in 1994 with a footprint of 40.5 acres and has a life expectancy of 20 more years. Divided into 10 cells, "the first cells were naturally attenuated," said Severino, "where the leachate was allowed to run into the ground and be naturally treated. When we opened cell five, we put down a clay liner to collect the leachate, and have done the same with cell six, recently opened."


The treatment project is a complement to the methane collection system already part of the landfill operations.


"Currently we are collecting and flaring the methane gas. This system has only a one-twentieth impact on the environment compared to the natural process," said Severino. "Once the cogeneration plant is operational, the methane will not only produce energy for the area but will also be used to heat and help facilitate the leachate treatment system."


North Bay's energy from gas project, is the first to receive approval under the province's new Green Energy Act and is targeted to start production the end of June. The cost of this initiative was also $5 million.


"At peak capacity the plant should generate 1.6 megawatts of electricity," said Korell. "Enough to supply many of the homes in the area and stabilize that end of the city. It's about the equivalent of 1,300 homes."


The cogeneration plant will offset about 45,000 tons of carbon dioxide annually.


North Bay Hydro received approval for the renewable energy project in June 2011.


"Our philosophy, when it comes to the landfill site, is to limit what's going in there, and to optimize what's going on," Korell said.


Korell and Severino are excited about the city's approach to waste management, and are already eyeing starting the expansion planning process in about 10 years in order to have everything in place at the end of the current certification period. They both feel the city is, "ahead of the game in Northern Ontario," and they want to see it stay in the environmental lead.


"We are already diverting as much as 40 per cent of our waste, through recycling," said Korell, " and we're working to make the current landfill site last as long as possible.


"We're also fortunate that the city owns lots of land where the site is now, so we'll be able to expand, rather than have to look for a new location."


As the first such site approved to produce biogas, "we've sort of been the provincial guinea pig," said Severino. "MOE has been using us as a demonstration site and bringing people to show them what a well managed landfill is like."


Mayor Al McDonald says the landfill site initiatives are part of council's commitment to the environment and to future generations.


"These projects see over $10 million invested at the Merrick landfill site," he said, " to ensure the City's future needs are satisfied in an environmentally responsible way."



View the original article here

No comments: