When SEPA considers an application for a Pollution Prevention and Control (PPC) permit, it must do so with due regard to various pieces of guidance.
Below, you will find links to this guidance which you may find useful in considering your own view on Oran’s application.

SEPA's own guidance on Noise, Site reports, general guidance for Operators
 http://www.sepa.org.uk/ppc/guidance/index.htm

UK Technical Guidance Note (SG8) Secretary of State's Guidance for the A2 rendering sector (Not statutory guidance in Scotland but we "have regard" to it)

Horizontal IPPC Guidance on Odour, Noise, BAT, Energy Efficiency
http://www.sepa.org.uk/ppc/uktech/index.htm

The BAT reference document (BREF Note) on Slaughterhouses and Animal By-products Disposal is available to download via the European IPPC Bureau http://eippcb.jrc.es/pages/FActivities.htm

The practical guide to the Waste Incineration (Scotland) Regs on the Scottish Executives's website
http://www.scotland.gov.uk/Publications/2005/04/19140354/03551