The new biological waste water treatment plant significantly improves the quality of the water
March 27, 2015
Lecta has successfully completed a new phase in its ambitious investment plan at its Zaragoza mill, totalling some 23 million euros, aimed at reducing its environmental impact. Lecta’s goal is that the Zaragoza site becomes a benchmark for sustainability in the paper industry.
Following the installation of two new electrostatic precipitators in the mill’s recovery boilers, resulting in a 74 percent reduction in solid particle emissions, Lecta has started up a biological water purification plant with excellent results. In the first few months, there has already been a drastic reduction in effluent load, with values far below the legal limits. Chemical Oxygen Demand (COD) values were cut nearly in half, Total Suspended Solids (TSS) have decreased by 36 percent and in the case of Biochemical Oxygen Demand (BOD5), the decrease was even more pronounced: 72 percent compared to the average observed in 2013.