Danish municipalities work towards separating stormwater and sewage. But stormwater runoff may be heavily polluted and therefore it is needed to find Best Available Technologies (BAT) to source separate and treat stormwater before discharge into surface waters. The aim here was to determine the sizes of particles found in stormwater from roads and to evaluate the use of a cationic organic flocculant to increase the size of the particles and thereby increase the removal efficiency of a 10 μm disc filter. The samples were collected in connection with a project testing a pilot scale disc filter for treating stormwater runoff. The micro-sized particles were found to be mainly 2.1-19 μm in diameter and nano-sized particles were also observed (86-228 nm). Although the flocculant increased the observed volume of the micro-sized particles by 46%, the majority of the particles where still < 10 μm. Partial removal of particle-associate polycyclic aromatic hydrocarbons was confirmed.
|Title of host publication||Specialist Conference. Advances in particle science and separation: from mm to nm scale and beyond : Proceedings|
|Place of Publication||Sapporo, Japan|
|Publication status||Published - 2014|
|Event||Specialist Conference. Advances in particle science and separation: from mm to nm scale and beyond - Hokkaido University Conference Hall, Sapporo, Japan|
Duration: 15 Jun 2014 → 18 Jun 2014
|Conference||Specialist Conference. Advances in particle science and separation: from mm to nm scale and beyond|
|Location||Hokkaido University Conference Hall|
|Period||15/06/2014 → 18/06/2014|
- Discfilter technology
- Particle-associated pollution
- Particle size distribution
- Polycycle aromatic hydrocarbons
- Stormwater runoff
Nielsen, K., Mørch-Madsen, A., Mikkelsen, P. S., & Eriksson, E. (2014). Nano- and microparticles and associated pollutants in stormwater runoff: effects of disc filtration with and without flocculant addition. In Specialist Conference. Advances in particle science and separation: from mm to nm scale and beyond: Proceedings (pp. 1-11). IWA Publishing.