Nitrogen removal by three types of bioretention columns under wetting and drying regimes

Abstract

The behaviors of inorganic nitrogen species in three types of bioretention columns under an intermittently wetting regime were investigated. The mean NH₄⁺—N, NO₃⁻—N and total N (TN) removal efficiencies for the conventional bioretention column (Col. T1) are 71%, 1% and 41%, for layered bioretention column with less permeable soil layer (Col. T2) the efficiencies are 83%, 84% and 82%, and for the bioretention column with submerged zone (Col. T3) the values are 63%, 31% and 53%, respectively. The best nitrogen removal is obtained using Col. T2 with relatively low infiltration rate. Adsorption during runoff dosing and nitrification during the drying period are the primary NH₄⁺—N removal pathways. Less permeable soil and the elevated outlet promote the formation of anoxic conditions. 30%–70% of NO₃⁻—N applied to columns in a single repetition is denitrified during the draining period, suggesting that the draining period is an important timeframe for the removal of NO₃⁻—N. Infiltration rate controls the contact time with media during the draining periods, greatly influencing the NO₃⁻—N removal effects. Bioretention systems with infiltration rate ranging from 3 to 7 cm/h have a great potential to remove NO₃⁻—N.

Keywords

runoff / NH₄⁺—N / NO₃⁻—N / bioretention / infiltration rate

References

[1] LinL-f, LiT, LiHe. Characteristics of surface runoff pollution of Shanghai urban area [J]. Environmental Science, 2007, 28(7): 1430-1434

[2] TaylorG D, FletcherT D, WongT H F, BreenP F, DuncanH P. Nitrogen composition in urban runoff-implications for stormwater management [J]. Water Research, 2005, 39(10): 1982-1989

[3] LiH, DavisA P. Urban particle capture in bioretention media I: Laboratory and field Studies [J]. J Environmental Engineering, 2008, 134(6): 409-418

[4] LiH, DavisA P. Heavy metal capture and accumulation in bioretention media [J]. Environmental Science & Technology, 2008, 42(14): 5247-5253

[5] HsiehC H, DavisA P, NeedelmanB A. Bioretention column studies of phosphorus removal from urban stormwater runoff [J]. Water Environment Research, 2007, 79(2): 177-184

[6] DiblasiC J, LiH, DavisA P, GhoshU. Removal and fate of polycyclic aromatic hydrocarbon pollutants in an urban stormwater bioretention facility [J]. Environmental Science & Technology, 2009, 43(2): 494-502

[7] MohantyS K, TorkelsonA A, DoddH, NelsonK L, BoehmA B. Engineering solutions to improve the removal of fecal indicator bacteria by bioinfiltration systems during intermittent flow of stormwater [J]. Environmental Science & Technology, 2013, 47(19): 10791-10798

[8] DavisA P, MohammadS, HimanshuS, ChristieM. Laboratory study of biological retention for urban stormwater management [J]. Water Environment Research, 2001, 73(1): 5-14

[9] HattB E, FletcherT D, DeleticA. Hydraulic and pollutant removal performance of stormwater filters under variable wetting and drying regimes [J]. Water Science & Technology, 2007, 56(12): 11-19

[10] KimH, SeagrenE A, DavisA P. Engineered bioretention for removal of nitrate from stormwater runoff [J]. Water Environment Research, 2003, 75(4): 355-367

[11] DietzM E, ClausenJ C. Saturation to improve pollutants retention in a rain garden [J]. Environmental Science & Technology, 2006, 40(4): 1335-1340

[12] HsiehC H, DavisA P, NeedelmanB A. Nitrogen removal from urban stormwater runoff through layered bioretention columns [J]. Water Environment Research, 2007, 79(12): 2404-2411

[13] ChoK W, SongK G, ChoJ W, KimT G, AhnK H. Removal of nitrogen by a layered soil infiltration system during intermittent storm events [J]. Chemosphere, 2009, 76(5): 690-696

[14] CarterM R, GregorichE GSoil sampling and methods of analysis [M], 2007Boca RatonCRC Press

[15] APHA, AWWA, WPCF.Standard methods for the examination of water and wastewater [S], 1999Washington D. CAmerican Public Health Association

[16] RuscianoG M, ObroptaC C. Bioretention column study: Fecal coliform and total suspended solids reductions [J]. Transactions of the ASABE, 2007, 50(4): 1261-1269

[17] TiedjeJ M, SexstoneA J, MyroldD D, RobinsonJ A. Denitrification: Ecological niches, competition, and survival [J]. Antonie van. Leeuwenhoek, 1982, 48(6): 569-583

[18] NielsenL P, ChristensenP B, RevsbechN P, SØensenJ. Denitrification and oxygen respiration in biofilms studied with a microsensor for nitrous oxide and oxygen [J]. Microbial Ecology, 1990, 19(1): 63-72

[19] BohnH L, McnealB L, O’connorG ASoil chemistry [M], 2001New YorkWiley80-140

[20] DavisA P, MohammadS, HimanshuS, ChristieM. Water quality improvement through bioretention media: nitrogen and phosphorus removal [J]. Water Environment Research, 2006, 78(3): 284-293

[21] YangH, MccoyE L, GrewalP S, DickW A. Dissolved nutrients and atrazine removal by column-scale monophasic and biphasic rain garden model systems [J]. Chemosphere, 2010, 80(8): 929-934

[22] LucasW C, GreenwayM. Hydraulic response and nitrogen retention in bioretention mesocosms with regulated outlets: part II-nitrogen retention [J]. Water Environment Research, 2011, 83(8): 703-713