# Commission Regulation (EU) No 142/2011 of 25 February 2011 implementing Regulation (EC) No 1069/2009 of the European Parliament and of the Council laying down health rules as regards animal by-products and derived products not intended for human consumption and implementing Council Directive 97/78/EC as regards certain samples and items exempt from veterinary checks at the border under that Directive (Text with EEA relevance), Division 2: Processing method

Extent: E+W+S+N.I.

The high pressure hydrolysis biogas process shall be carried out according to the following processing standards:
(a)The animal by-products must be first processed using processing method 1 (pressure sterilisation) as set out in Chapter III in an approved processing plant;
(b)Following the process referred to in point (a), the defatted materials must be treated at a temperature of at least 220 °C for at least 20 minutes at a pressure (absolute) of at least 25 bar, heated in a two-step procedure, first by direct steam injection, secondly indirect in a coaxial heat exchanger;
(c)The process must be carried out in a batch or continuous system and the material is constantly mixed;
(d)The animal by-products must be treated in such a manner that the requirements regarding time, temperature and pressure are achieved at the same time;
(e)The resulting material must then be mixed with water and anaerobically fermented (biogas transformation) in a biogas reactor;
(f)In the case of starting material of Category 1, the entire process must take place on the same site and in a closed system and the biogas produced during the process must be combusted rapidly in the same plant at a minimum of 900 °C followed by rapid chilling (‘quenching’).

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Source: https://www.legislation.gov.uk/eur/2011/142/annex/IV/chapter/IV/section/2/division/C/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2011-142/annex-IV/chapter-IV/section-2/division-C/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.