Case Study - The North British Distillery
01 Dec 2010
Key objectives were identified as critical to the future
sustainability of distillery
operations; to reduce the energy profile of the business and to
reduce the environmental footprint and impact of spirit
The project will be managed in a staged approach that will
require each stage to
be verified on its technical capability and efficiency of operation
to the next. Subsequent stages will only be progressed where clear
future economic benefits can be identified.
Stage one involves the installation of an anaerobic digester to
condensate from the distillers dark grains process, grey water and
spent wash centrate into biogas. A dedicated biogas boiler will
burn the gas to produce process steam. Stage two will see the
expansion of the new anaerobic digestion plant and the installation
of a new water treatment plant (WTP) to process effluent from the
digester. The WTP will improve effluent quality and provide clean
water which can be recycled back into the process. The final stage
will involve the installation of a gas engine derived combined heat
and power (CHP) plant to produce electricity from the biogas.
The project seeks to produce up to 1MWe of renewable electrical
energy, save 1MWe through less intensive energy use of the existing
evaporation plant and recycle 40% of the effluent produced by the
distillery back into the process. Implementation of the project
will reduce CO2 emissions by 9000 tonnes per year (equivalent to
driving around the world 1415 times).
The distillery's aspiration is to expand its anaerobic digestion
and electrical generation capacity to 3MWe so that it will be a
nonimporter of electrical energy.