Sustainable solutions from Watair
Modern wastewater treatment plants are highly efficient and their discharges are virtually solids-free. Sewage sludge is created as a resultant by-product and this possesses considerable potential for use as a source of energy and nutrients. However, a prerequisite for the employment of sewage sludge is correct treatment, which above all reduces or removes the high water content (> 95%), the pollutant load, pathogen bacteria and malodorous substances.
Sludge treatment facilitates a reduction in CO2.
The treatment of sewage sludge makes a considerable contribution to environmental protection, due to the fact that fewer landfill emissions, comprised of active greenhouse gas, escape into the atmosphere. In terms of a city with 1 million inhabitants, the sustained anaerobic stabilization of sewage sludge provides a reduction in greenhouse gases amounting to 70,000t CO2 equivalents.