ENERGY USE

The Bisha Mine relies on diesel fuel to meet all energy requirements and we take a proactive role in monitoring our consumption. In 2015, the mine consumed 38 million litres of diesel fuel, versus 38.1 million litres in 2014¹ , essentially maintaining the same consumption level.

Our reliance on self-generated electricity in a remote location represents an operational risk from potential supply interruptions and an opportunity to diminish our greenhouse gas (GHG) contributions and minimize our operating costs (fuel is one of our most significant costs). BMSC continues to pursue a project to install renewable hybrid energy to offset diesel generation and is in the process of identifying a suitable supplier.

EMISSIONS

Emissions at the Bisha Mine are generated by mobile sources like dozers, dump trucks, light vehicles, contractor buses for transporting workers, as well as stationary sources, including diesel generators and regeneration kilns. The annual calculation also included the fuel utilized for the transport of copper concentrate from Bisha to the Port of Massawa and back. Direct GHG emissions for 2015 are estimated at 192.6 kt CO2 equivalent, an increase over 2014 due to the increased fuel consumption cited below.

Monitoring devices have been in use since 2012 to measure emissions from stationary and mobile equipment. Emission monitoring covers ozone producing gasses (CO, NO) and other significant air emissions (NOx, SOx).

FUEL TYPE AMOUNT
CONSUMED IN 2015 (000 LITRES)
AMOUNT
CONSUMED IN 2014
(000 LITRES)
CONVERSION
FACTOR TO MEGA JOULES (MJ)
ENERGY
EQUIVALENTS IN 2015
(000 GJ)
GHG EMISSIONS
IN 2015
(T CO2)2
Mobile equipment on site 9,614 8,665 38.6 371.1 25,865
Generators – diesel 20,949 21,101 38.6 808.6 56,362
Diesel on site 2,182 1,998* 38.6 84.2 5,872
Transport (conc and materials) 5,631 6,369 38.6 217.4 15,150
Petrol on site 2 5 34.2 0.1 5
Total 38,376 38,138 1,481.4 103,254

¹ The 2014 fuel consumption has been updated according to an inhouse audit.

² Greenhouse Gas Emissions were calculated based on the Greenhouse Gas Protocol standard tools