Sustainability Report 2014 Lek d.d.

45 Environment 2.7.2 Phosphorus and nitrogen com- pounds, chemical oxygen demand Nitrogen compound emissions mostly result from the fer- mentation production. The Menge‰ site accounts for the largest share of these emissions, also at the expense of the 5-NOK production, followed by Lendava and Ljubljana, and, at a negligible level, the Prevalje site, as demonstrated in the graphic presentation of the emission trends by site. In 2014, the total volume of nitrogen compound emissions increased by 10%, however, it was still 21% lower than in 2010. The Menge‰ site is also the major generator of phosphorus compounds, their source being residual inorganic substan- ces. As the annual amounts of phosphorus and nitrogen compounds are reported after treatment in the wastewater treatment plant, they largely depend on the efficiency of the wastewater treatment. To provide an assessment of the level of pollution with organ- ic impurities, chemical oxygen demand is an important parameter, providing the quantity of oxygen needed for chem- ical oxidation of organic pollution in wastewater. Chemi- cal oxygen demand measurements are carried out at the Graph 10: Wastewater volumes in cubic meters Lendava Lek d.d. Ljubljana Menge‰ Prevalje Wastewater volumes Wastewater volume Lek d.d. 2010 2010 m 3 m 3 Year Year 2011 2011 2012 2012 2013 2013 2014 2014 1,800,000 3,600,000 1,600,000 3,500,000 1,200,000 1,000,000 3,200,000 3,300,000 3,400,000 600,000 3,100,000 200,000 3,000,000 1,400,000 800,000 400,000 0 2,900,000 62 EMAS Core Indicator, GRI Indicator G4-EN22 Table 18: Wastewater volumes by discharge quality and destination 62 Use of cooling water - unpolluted 2010 in 000 m 3 1,260 55 1,408 11 2,734 2011 in 000 m 3 1,170 34 1,243 10 2,457 2012 in 000 m 3 1,109 18 1,138 5 2,270 2013 in 000 m 3 1,129 35 1,156 5 2,325 2014 in 000 m 3 1,212 75 1,278 8 2,573 Discharge into the into sewage into the into sewage surface system surface system water course water course cleaning at WWTP Use of industrial water - polluted 2010 in 000 m 3 167 341 271 28 807 2011 in 000 m 3 163 381 259 25 828 2012 in 000 m 3 163 434 271 30 898 2013 in 000 m 3 187 442 296 34 959 2014 in 000 m 3 168 494 279 34 975 Discharge into sewage into sewage into sewage into sewage system system system system cleaning at cleaning at cleaning at WWTP WWTP WWTP Year Unit Lendava Ljubljana Prevalje Menge‰ Lek (Total)