Sustainability Report 2016 / 2017

52 ➲ Waste The total amount of waste from the site has risen significantly since 2012 (2013 + 38  percent; 2014 + 15 percent, 2015 + 3  percent). Filter cakes from the physicochemical wastewater treatment plant make up the largest portion of waste. They are drained in a powerful chamber filter press. For the past several years the compressed sludge has been recycled and therefore does not fall into the category of hazardous waste. The amount of hazardous waste compared to 2013 rose sharply, but was reduced again in 2015. With the measures described in the section Water/Wastewater, 190 tons of rinse water in 2014 and 253 tons in 2015 were separately collected and properly disposed of as legally required. Wastewater sludge (g)/per filling amount (piece) Waste per Filling Amount 25 20 15 10 5 0 12.59 18.29 19.47 2012 2013 2014 2015 18.45 19.58 13.51 19.21 19.55 0/00 Waste (g)/filling amount (kg) Waste (g)/filling amount (piece) Wastewater Sludge per Filling Amount 10 5 0 3.51 7.10 8.49 2012 2013 2014 2015 8.29 8.80 3.77 7.46 8.53 0/00 Wastewater sludge (g)/per filling amount (kg) Environmental Statement · Mainz site