presentation for bradford environment action trust on the autoclaving of municipal waste...
TRANSCRIPT
PRESENTATION FORBradford Environment Action Trust
ON THE AUTOCLAVING OF MUNICIPAL WASTE
PRESENTATION BY RICHARD LONGCAKE AND IAN BAIRSTOW
7TH SEPTEMBER 2007
Purpose• Purpose of the presentation is to give a brief
overview of the proposal to treat 130,000 Tonnes per annum of Bradford’s Household Waste using an autoclave.
• To outline key issues and messages.
• Answer any questions.
Background
On 26th June 2007 full Council resolved to award a short term contact for treatment of municipal waste. This tender will use autoclave technology, to be located at a facility on Buck Street in Bradford, for which planning permission was obtained by the contractor in May 2006.
Planning application• Buck Street site planning application took 12
months to determine, • Planning decision includes several conditions
covering its operation eg limits on traffic movements
• The application included a site search and a full environmental impact assessment covering issues of odour, emissions, and traffic
• Regenerates a currently derelict brown field site• The site meets planning criteria being located in
an employment zone which is mainly industrial in nature
Wastes Management
• The council will deliver 130,000 tpa of household waste• The process will seek to divert some 75,000 tpa of BMW away
from landfill• The site will not be licensed for receipt of hazardous wastes• If hazardous wastes accidentally arrive at the site, the waste
acceptance procedures as required by the site licence will identify them, and quarantine them pending disposal as agreed with the EA
• As a result of gas and water filtration there may be a small amount of solid residue which testing may show it to be hazardous waste requiring specialised disposal
Emissions
EIA includes assessing impacts of emissions (human population), and details mitigation, main points to note are:
• All waste handling and treatment takes place inside an enclosed building with negative air pressure and airlock doors
• There are several air changes per hour via a filtration system with activated charcoal
• No waste is combusted on site – no gases• Only exhaust gases are from heat raising plant
Emissions• Maximum projected level of emissions is only 5%
of Environmental Quality Standard• Site operations will be subject to a Waste
Management Licence, issued and monitored by the EA, this covers the Human Population issues, limits will be set and monitored (see Table 2)
• The site will not be licensed for receipt of hazardous waste
TABLE 2Pollutant Metric Modelled Concentration
EQS
2000 2001 2002
Nitrogen oxides Annual mean 2.0 2.2 1.7 40 µg.m-3
Hourly Maximum 46 47 44 200 µg.m-3
Particulate material Annual mean 0.1 0.1 0.1 40 µg.m-3
Daily maximum 1.4 1.1 1.0 50 µg.m-3
Sulphur dioxide Hourly maximum 0.6 0.6 0.6 350 µg.m-3
Daily maximum 0.4 0.3 0.3 125 µg.m-3
Global carbon position• The plant will process 130,000t/pa of MSW, of
which a 20% residue, or 26,000t/pa, will go to landfill
• Avoided landfill = 104,000t/pa• One tonne of waste in a landfill degrades
anaerobically, producing green house gases in approx ratio 400 cubic metres methane and 400 cubic metres of carbon dioxide
• The plant is a net energy user at 10.5MWh – natural gas, not renewable
Global warming comparisonGlobal warming potential Tonnes / yr
Waste processed 130,000
Waste diverted from landfill 104,000
CO2 tonnes impact of landfill 39,000
CO2 impact of autoclave
CO2 tonnes saving by diversion -31,200
Energy used by autoclaves (3) 10.5 MWh
CO2 impact of gas used 7,000
Net CO2 tonnes benefit of autoclave
-24,200
Community benefit• Buck Street will create 40 new jobs located in a modern purpose built facility, with
atmospheric controls and mechanised waste handling and sortation• Will generate a community fund based on a 30p levy for each tonne of waste received -
generate £40,000/year• Site improvement, as the development brings back into use a 1.1 hectare area of long
standing derelict land