# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 8: Authorisations: operating conditions


(1) SEPA must ensure that an authorisation for the incineration or co-incineration of waste at a waste incineration plant or co-incineration plant includes such conditions as it considers appropriate to ensure that—
(a) waste incineration plants are operated to achieve a level of incineration, using waste pre-treatment techniques where necessary, so that—
(i) the total organic carbon content of slag and bottom ashes is less than 3% of the dry weight of the material, or
(ii) the loss on ignition of the slag and bottom ashes is less than 5% of the dry weight of the material,
(b) waste incineration plants must be designed, equipped, built and operated in such a way that the gas resulting from the incineration of waste is raised, after the last injection of combustion air, in a controlled and homogeneous fashion and even under the most unfavourable conditions, to a temperature of at least 850°C for at least two seconds,
(c) waste co-incineration plants must be designed, equipped, built and operated in such a way that the gas resulting from the co-incineration of waste is raised in a controlled and homogeneous fashion and even under the most unfavourable conditions, to a temperature of at least 850°C for at least two seconds,
(d) if hazardous waste with a content of more than 1% of halogenated organic substances, expressed as chlorine, is incinerated or co-incinerated, the temperature required to comply with sub-paragraphs (b) and (c) is at least 1,100°C,
(e) in waste incineration plants, the temperatures set out in sub-paragraphs (b) and (d) must be measured—
(i) near the inner wall of the combustion chamber, or
(ii) such other representative point of the combustion chamber as authorised by SEPA,
(f) each combustion chamber of a waste incineration plant must be equipped with at least one auxiliary burner to be used in accordance with sub-paragraphs (g), (h) and (i),
(g) the auxiliary burner must be switched on automatically when the temperature of the combustion gases after the last injection of combustion air falls below the temperatures set out in sub-paragraphs (b), (c) and (d),
(h) the auxiliary burner must be used during plant start-up and shut-down operations to ensure that those temperatures are maintained at all times during these operations and as long as unburned waste is in the combustion chamber,
(i) the auxiliary burner must not be fed with fuels which can cause higher emissions than those resulting from the burning of gas oil,
(j) waste incineration plants or co-incineration plants must operate an automatic system to prevent waste feed in the following circumstances—
(i) at start-up, until the temperature set out in sub-paragraphs (b), (c), (d) or otherwise specified by SEPA in accordance with paragraph 10 of this schedule, has been reached,
(ii) whenever the temperature set out in sub-paragraphs (b), (c), (d) or otherwise specified by SEPA in accordance with paragraph 10 of this schedule is not maintained,
(iii) whenever the continuous measurements show that any emission limit value is exceeded due to disturbances or failures of the waste gas cleaning devices,
(k) any heat generated by waste incineration plants or waste co-incineration plants must be recovered as far as practicable,
(l) infectious clinical waste must be placed straight in the combustion chamber, without first being mixed with other categories of waste and without direct handling,
(2) In this paragraph, “gas oil” includes the fuels in sub-paragraphs (a) and (b), but not those fuels in sub-paragraphs (c) and (d)—
(a) any petroleum-derived liquid fuel, excluding marine fuel, falling within CN codes 2710 19 25, 2710 19 29, 2710 19 47, 2710 19 48, 2710 20 17 or 2710 20 19,
(b) any petroleum-derived liquid fuel, excluding marine fuel, of which less than 65% by volume (including losses) distils at 250°C and of which at least 85% by volume (including losses) distils at 350°C by the ASTM D86 method,
(c) diesel fuels falling within CN code 2710 19 41 and used for self-propelling vehicles,
(d) fuels used in non-road mobile machinery and agricultural tractors.

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/22/paragraph/8 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-22/paragraph-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.