Use of pilot-scale geomedia-amended biofiltration system for removal of polar trace organic and inorganic contaminants from stormwater runoff

Filter media for storm water treatment in sustainable cities: A review

“…The "train" was fed with real-life storm water runoff for 8 months. After the investigation period, Teixidó et al (2022) could observe that the removal of nitrate in the bioreactor was nearly 100% while it was less for phosphate removal in the sand filled columns in which phosphate broke through the iron-rich sand. During the first 4 months of the experiment, Teixidó et al (2022) observed 80% removal of metals and organic compounds in the columns filled with sand mixed with biochar and manganese oxides respectively.…”

“…After the investigation period, Teixidó et al (2022) could observe that the removal of nitrate in the bioreactor was nearly 100% while it was less for phosphate removal in the sand filled columns in which phosphate broke through the iron-rich sand. During the first 4 months of the experiment, Teixidó et al (2022) observed 80% removal of metals and organic compounds in the columns filled with sand mixed with biochar and manganese oxides respectively. The authors concluded that, under the conditions at the study site, the removal of nutrients would be sustained for about a decade, but the organic compounds would not.…”

“…An onsite experiments using biochar has been performed in which Teixidó et al (2022) investigated a pilot-scale "storm water treatment train". The treatment train consisted of different steps targeting different pollutants.…”

“…Some applications mimic conventional bioretention systems like the swales investigated by Fardel et al (2020) or green roofs as described by Teemusk and Mander (2007) and Liu and Coffman (2016). Other treatment facilities are specially designed such as the storm water treatment train described by Teixidó et al (2022).…”

“…Even though the treatment facility has performed well regarding the targeted pollutants, it can be expected that all pollutants present in the storm water will not be removed due to the design of the facility and/or the selection of filter media. A combination of treatment steps using different filter media in each step as described by Teixidó et al (2022) could be a solution. Storm water containing a wide range of pollutants could be treated and depending on the storm water composition, it would be possible to design the treatment facility for specific pollutants.…”