UNIONE NAZIONALE INDUSTRIA CONCIARIA - Euroleather

Figure 30 illustrates the characteristic values for anumber of atmospheric pollutants expressed in g/m2 andcalculated according to the following formula:POLLUTANT PER PRODUCT UNIT(g/m 2 ) = CA (Kg/year)/P * 1,000figure 30 - Atmospheric parameters per unit product 2002 - 2009 (g/m 2 )1.982.032.112.042.052.032.042.102.42where:AL = annual loadsP = production in m 21.421.631.451.461.71The polluting loads were calculated as follows:CA [Kg/y] = C [mg/Nm 3 ] * F[Nm 3 /h] * h [hours worked/y]/10 61.221.05where:C = concentration at the stackF = overall flow rate of plants which emit the pollutanth = sum of the hours worked in one year0.600.760.770.710.740.800.870,80Source: UNIC 2009The emissions were found to be virtually constant duringthe period surveyed.It was also possible to monitor the consumption ofsolvents per unit product referred to 2009, since thetanneries included in the sample implemented a specificphysical accounting system. In this way it was possibleto calculate an “average emission factor”, expressed ingrams of VOC consumed per unit product (g/m 2 ). Theresultant value is slightly greater than 50 g/m 2 , a valuethat confirms the measurements made in previous years.0.050.050.050.050.05Dusts NOx SOx H 2S2002 2003 2004 2005 2006 2007 2008 20090.040.06In addition, the data collected by the Province of Vicenzais also shown (Table 5, Figure 31), refers to theVeneto tanning centre: the figures reflect the trend forthe consumption of solvents during the 1996/2009 period,compared to the production of the same districtexpressed in m 2 . The trend for the consumption of solventsdecreased (-71%) from 1996 to 2008, compared tothe trend of production illustrated in the figure.40