For the regeneration of waste activated carbon, BAT is to: Have an effective quality control procedure in place to ensure that the operator can 109 differentiate between the carbon used for potable water or food grade carbon and the rest of spent carbons (the so-called carbons’) (see Section 4.4.4.2) ‘industrial Require a written undertaking from customers indicating what the activated carbon has 110 been used for (see Section 4.1.2.3 and this is also related to BAT number 12.c) Utilise an indirect fired kiln for industrial carbons may be argued that this could equally –it 111 be applied to potable water carbons. However, limits on capacity and corrosion may deem that only multiple hearth or direct fired rotary kilns may be used (see Section 4.4.4.1) Utilise an afterburner with a minimum of 1100 °C, two seconds residence time and 6 % 112 excess oxygen for the regeneration of industrial carbons where refractory halogenated or other thermally resistant substances are likely to be present. In other cases, less stringent thermal conditions are sufficient (see Section 4.4.4.2)
For the regeneration of waste activated carbon, BAT is to: 109 Have an effective quality control procedure in place to ensure that the operator can differentiate between the carbon used for potable water or food grade carbon and the rest of spent carbons (the so-called ‘industrial carbons’) (see Section 4.4.4.2) 110 Require a written undertaking from customers indicating what the activated carbon has been used for (see Section 4.1.2.3 and this is also related to BAT number 12.c) 111 Utilise an indirect fired kiln for industrial carbons –it may be argued that this could equally be applied to potable water carbons. However, limits on capacity and corrosion may deem that only multiple hearth or direct fired rotary kilns may be used (see Section 4.4.4.1) 112 Utilise an afterburner with a minimum of 1100 °C, two seconds residence time and 6 % excess oxygen for the regeneration of industrial carbons where refractory halogenated or other thermally resistant substances are likely to be present. In other cases, less stringent thermal conditions are sufficient (see Section 4.4.4.2)
Conclusions%20on%20BAT%20for%20Waste%20Treatment%20-draft%2011.12.14.docx