Discussions with industry have indicated that it would not be possible to incorporate the diverse requirements of producers and users into a single specification for SRF and so, for the purposes of definition within the RO, a minimum standard for SRF was developed that enables it to be distinguished from other types of waste. This serves as a basis for a quality standard for SRF which individual SRF producers and users will agree between themselves. The statutory definition of SRF is laid down in the Renewables Obligation Order 200911:
"Solid Recovered Fuel" means solid fuel which-
a. complies with the classification and specification requirements in CEN/TS 15359:2006,
b. is prepared from a waste which is not a hazardous waste,
c. has a maximum Respiratory Index value of no more than 1500 milligrams of oxygen per kilogram of volatile solids per hour when measured using the real dynamic respiration test specified in CEN/TS 15590:2007, and
d. when subject to a methodology for the determination of particle size in accordance with CEN/TS 15415:2006, is able to pass through an opening measuring no more than 150 millimetres in all dimensions".
The definition for SRF in CEN/TS 15359 is:
"Solid fuel prepared from non-hazardous waste to be utilised for energy recovery in incineration or co-incineration plants, and meeting the classification and specification requirements laid down in CEN/TS 15359 where "prepared" means processed, homogenised and upgraded to a quality that can be traded amongst producers and users."
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11 http://www.opsi.gov.uk/si/si2009/uksi 20090785 en 1