Co-digestion at Annacis Island WWTP: Metro Vancouver’s Path to Renewable Energy and Greenhouse Gas Emissions Reductions

Annacis Island Wastewater Treatment Plant
Vancouver, British Columbia (Canada)

Annacis Island Wastewater Treatment Plant which is operated by Metro Vancouver, is leading
the way in working within a carbon based regulatory environment. British Columbia has
instituted carbon reduction legislation province wide, a leader in North America. As a result
public entities, such as Metro Vancouver, must be carbon neutral by 2012. In response the utility
is holistically investigating different approaches to achieve the required GHG reductions. One
approach now being actively pursued is the implementation of co-digestion at Annacis Island.
Having developed a the scope for a full co-digestion program at the plant, a pilot facility was
constructed to provide further process controls as well as a start at reducing emissions by codigesting
material at the plant. This project also provided Metro Vancouver a basis of handling
its own sludges from other wastewater treatment plants on an emergency or planned basis by
dual tasking the receiving facility to receive both sludges and co-digestion substrates.

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Posted: May 20th, 2011 | Filed under: 500K-1M, Waste Water Treatment | Tags: Cost Savings, Energy Production, Environmental Impact, Improved Plant Performance, Improved Plant Sustainability, Reduced Carbon Footprint, Reduced Greenhouse Gas Emissions | No Comments »

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Wastewater to Energy: The Integration of Biosolids Drying Technology and Energy Recovery

Milton Regional Sewer Authority
Milton, Pennsylvania

Designed in the 1960’s and constructed in the mid-1970’s, the Milton Regional Sewer
Authority’s (MRSA’s) 3.420 MGD wastewater treatment plant (WWTP) is in need of a
complete facility upgrade. The upgrade will need to not only account for strict nitrogen
and phosphorus effluent requirements, but also seek out opportunities to minimize energy
dependence and operational costs through biogas production, electrical generation,
biosolids drying and sale of electricity to the Grid.
The end goal for this project is to create an energy independent, green wastewater
treatment facility. The objectives are to maximize energy recovery by exploiting all
reasonable sources; to minimize energy use throughout the facility; and to identify the
most feasible methods of energy recovery. Anaerobic treatment will be used were
applicable to meet these objectives through lower connected horsepower and biogas
production.

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Posted: May 3rd, 2011 | Filed under: <50K, Sanitary Sewer, Waste Water Treatment | Tags: Biosolids Management, Cost Savings, Energy Production, Energy Savings, Environmental Impact, Improved Plant Efficiency, Plant Optimization, Plant Sustainability, Reduced Carbon Footprint, Reduced Greenhouse Gas Emissions | No Comments »

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