The Potential For Energy Self-sufficiency In The
United Kingdom Rendering Industry

Price

Free (open access)

Paper DOI

10.2495/RAV110441

Pages

9

Published

2011

Size

351 kb

Author(s)

A. D. Ramirez, A. Humphries, S. L. Woodgate & R. Wilkinson

Abstract

Animal by-products (ABPs) are co-products of meat production system that
include on-farm fallen stock and slaughterhouse co-products that are not fit for
human consumption (different types of fat, offal and bone).  Slaughterhouse coproducts
represent between 30 to 50% of the life weight of farm animals.  In the
UK, fat, offal and bone are normally handled by rendering.  Rendering is a
process where ABP are sized and then dried to produce rendered products:
tallow and a protein meal.  Depending on the category of the ABP, rendered
products can be used in pet foods manufacturing, the oleochemical industry and
as biofuels (with and without further processing).  The UK rendering industry
uses both tallow and natural gas as fuel for heat production during the drying
process.  A study of UK rendering plants was undertaken to determine the total
tallow production and the relative proportions of tallow and natural gas used as
fuels.  Data on fuel and energy use was collected from five rendering plants,
representing 50% of the ABP processed in the UK.  The results indicate that
tallow use by the UK rendering industry ranged from 15 – 100% of total heat
production with the remainder being derived from natural gas.  When scaled up,
it can be calculated that between 2006 and 2008 the UK rendering industry
required around 5.7 PJ of heat per annum.  During the same period the energy
potentially available from rendered tallow (usable as biofuel) was 6.7 PJ.  It can
be concluded that potentially the UK rendering industry could be self-sufficient
in energy use.  However, use of tallow as a biofuel depends on the relative cost of
natural gas compared to alternative markets for tallow. 
Keywords: rendering, self-sufficiency, tallow, meat and bone meal, biofuels,
United Kingdom.