(BAT) Reference Document for the Production of Chlor-alkali ...
(BAT) Reference Document for the Production of Chlor-alkali ...
(BAT) Reference Document for the Production of Chlor-alkali ...
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Chapter 3<br />
3.5.11 Emissions and waste generation during decommissioning<br />
In general, mercury emissions during decommissioning are expected to be lower than during<br />
operation. Although <strong>the</strong> mercury concentrations in workspace air are usually higher during<br />
decommissioning than during normal operation, mercury emission to air during<br />
decommissioning are usually lower because <strong>the</strong> cell room temperature decreases once <strong>the</strong> cells<br />
are shut down which greatly reduces <strong>the</strong> ventilation air flow [ 237, Lindley 1997 ]. For example,<br />
total mercury emissions to air and water during decommissioning <strong>of</strong> <strong>the</strong> Ercros plant in<br />
Sabiñánigo (Spain) amounted to 2.5 kg and 25 g, respectively, corresponding to emission<br />
factors <strong>of</strong> 0.1 and 0.001 g/t annual chlorine capacity. These emission factors are more than<br />
fivefold lower than those reported during normal plant operation [ 275, ANE 2010 ].<br />
Significantly reduced emissions during decommissioning compared to normal operation were<br />
also reported by Solvay <strong>for</strong> its plant in Roermond (Ne<strong>the</strong>rlands) [ 278, Verberne and Maxson<br />
2000 ].<br />
Large amounts <strong>of</strong> mercury-containing wastes are generated during decommissioning. Most <strong>of</strong><br />
<strong>the</strong> mercury incurred during decommissioning is in its elemental <strong>for</strong>m. Metallic mercury no<br />
longer used in <strong>the</strong> chlor-<strong>alkali</strong> industry is considered waste [ 279, Regulation EC/1102/2008<br />
2008 ]. The quantities <strong>of</strong> metallic mercury contained in cells in operation are shown in Table<br />
3.22. Table 3.32 provides data from example plants on mercury quantities collected, recovered<br />
or disposed <strong>of</strong> with waste during decommissioning.<br />
Table 3.32: Mercury collected, recovered or disposed <strong>of</strong> with waste during decommissioning<br />
<strong>Chlor</strong>ine<br />
capacity<br />
Metallic<br />
mercury<br />
collected ( 1 )<br />
O<strong>the</strong>r<br />
metallic<br />
mercury<br />
recovered ( 2 Company, location [<strong>Reference</strong>]<br />
)<br />
Mercury<br />
disposed <strong>of</strong><br />
with waste<br />
in kt/yr in kg/t annual chlorine capacity<br />
AkzoNobel in Delfzijl (Ne<strong>the</strong>rlands)<br />
[ 278, Verberne and Maxson 2000 ]<br />
48 1.3 0.28 0.29<br />
AkzoNobel in Bohus (Sweden) [ 278,<br />
Verberne and Maxson 2000 ]<br />
6 1.5 1.2 NI<br />
AkzoNobel in Skoghall (Sweden)<br />
[ 278, Verberne and Maxson 2000 ]<br />
80 2.4 0.15 0.13<br />
Arkema in Saint Auban (France)<br />
[ 276, French Ministry 2010 ]<br />
184 2.2 NI > 0.16<br />
Ercros in Sabiñánigo (Spain)<br />
[ 275, ANE 2010 ]<br />
25 1.8 0.03 NI<br />
ICI in Billingham (United Kingdom)<br />
[ 277, Dring 2010 ]<br />
69 3.5 0.17 NI<br />
ICI in Cornwall/Ontario (Canada)<br />
[ 278, Verberne and Maxson 2000 ]<br />
50 2.1 0.02 0.25<br />
ICI in Hillhouse (United Kingdom)<br />
[ 277, Dring 2010 ]<br />
98 3.8 NI NI<br />
ICI in Runcorn (United Kingdom)<br />
[ 277, Dring 2010 ]<br />
188 2.3 0.85 NI<br />
ICI in Wilton (United Kingdom)<br />
[ 277, Dring 2010 ]<br />
69 3.0 0.50 NI<br />
Solvay in Roermond (Ne<strong>the</strong>rlands)<br />
[ 278, Verberne and Maxson 2000 ]<br />
146 1.5 0.11 0.08<br />
( 1 ) Metallic mercury collected from storage facilities and cells including piping systems.<br />
( 2 ) O<strong>the</strong>r metallic mercury obtained from cleaning and/or recovery operations such as retorting.<br />
NB: NI = no in<strong>for</strong>mation available.<br />
WORKING DRAFT IN PROGRESS<br />
130 December 2011 TB/EIPPCB/CAK_Draft_1