Tanks in a municipal sewage treatment plant
© Siemens AG
© Siemens AG
Urban Waste Water
Municipal waste water consists of various dirty water sources that are collected and carried away by the sewer system. In addition to storm water that flows off of buildings or hard surfaces, it also includes wastewater from households and industrial and commercial operations that do not have their own waste water treatment systems.
In Germany, over 10,000 municipal sewage treatment plants are available for water purification. These mainly use mechanical and biological treatment stages for the targeted elimination of nitrogen and phosphates, in order to break down nutrients and hazardous materials.
74 Results in Urban Waste Water
In comparison with completely stirred installations, the plug flow process has reduced chemical oxygen demand (COD) by 10 – 15%. The treatment of older sludge has resulted in more extensive COD elimination. For denitrification and biological phosphate elimination, this process has also shown clear advantages over conventional practices. Expand
Source:
Federal Ministry of Education and Research (BMBF)
Type:
Project
The effective elimination of bacteria and phosphorous has been achieved using a process combination of precipitation/flocculation/microscreening-microfiltration. Conversely, the use of powdered carbon has not produced any significant removal of adsorbable organic halogen compounds (AOX). Catalytic denitrification has also failed to achieve the desired success. Expand
Source:
Federal Ministry of Education and Research (BMBF)
Type:
Project
Using the technology mentioned above the purification efficiency concerning organic waste load and nitrogen does in no way lack behind that of modern large-sized sewage treatment plants. Investment and running cost as well as technological expenditures are comparable with sewage plants without advanced treatment. Expand
Source:
Federal Ministry of Education and Research (BMBF)
Type:
Project
