TY - JOUR
T1 - Constructed wetlands for agricultural wastewater treatment in northeastern North America
T2 - A review
AU - Rozema, Eric R.
AU - VanderZaag, Andrew C.
AU - Wood, Jeff D.
AU - Drizo, Aleksandra
AU - Zheng, Youbin
AU - Madani, Ali
AU - Gordon, Robert J.
N1 - Publisher Copyright:
© 2016 by the authors.
PY - 2016
Y1 - 2016
N2 - Constructed wetlands (CW) are a treatment option for agricultural wastewater. Their ability to adequately function in cold climates continues to be evaluated as they are biologically active systems that depend on microbial and plant activity. In order to assess their performance and to highlight regional specific design considerations, a review of CWs in Eastern Canada and the Northeastern USA was conducted. Here, we synthesize performance data from 21 studies, in which 25 full-scale wetlands were assessed. Where possible, data were separated seasonally to evaluate the climatic effects on treatment performance. The wastewater parameters considered were five-day biochemical oxygen demand (BOD5), total suspended solids (TSS), E. coli, fecal coliforms, total Kjeldahl nitrogen (TKN), ammonia/ammonium (NH3/NH5+-N), nitrate-nitrogen (NO3 -N), and total phosphorus (TP). Average concentration reductions were: BOD5 81%, TSS 83%, TKN 75%, NHNH5+-N 76%, NO3 -N 42%, and TP 64%. Average log reductions for E. coli and fecal coliforms were 1.63 and 1.93, respectively. Average first order areal rate constants (ka, m · y-1) were: BOD5 6.0 m · y-1, TSS 7.7 m · y-1, E. coli 7.0 m · y-1, fecal coliforms 9.7 m · y-1, TKN 3.1 m · y-1, NH4+-N 3.3 m · y-1, NO3- -N 2.5 m · y-1, and TP 2.9 m · y-1. In general, CWs effectively treated a variety of agricultural wastewaters, regardless of season.
AB - Constructed wetlands (CW) are a treatment option for agricultural wastewater. Their ability to adequately function in cold climates continues to be evaluated as they are biologically active systems that depend on microbial and plant activity. In order to assess their performance and to highlight regional specific design considerations, a review of CWs in Eastern Canada and the Northeastern USA was conducted. Here, we synthesize performance data from 21 studies, in which 25 full-scale wetlands were assessed. Where possible, data were separated seasonally to evaluate the climatic effects on treatment performance. The wastewater parameters considered were five-day biochemical oxygen demand (BOD5), total suspended solids (TSS), E. coli, fecal coliforms, total Kjeldahl nitrogen (TKN), ammonia/ammonium (NH3/NH5+-N), nitrate-nitrogen (NO3 -N), and total phosphorus (TP). Average concentration reductions were: BOD5 81%, TSS 83%, TKN 75%, NHNH5+-N 76%, NO3 -N 42%, and TP 64%. Average log reductions for E. coli and fecal coliforms were 1.63 and 1.93, respectively. Average first order areal rate constants (ka, m · y-1) were: BOD5 6.0 m · y-1, TSS 7.7 m · y-1, E. coli 7.0 m · y-1, fecal coliforms 9.7 m · y-1, TKN 3.1 m · y-1, NH4+-N 3.3 m · y-1, NO3- -N 2.5 m · y-1, and TP 2.9 m · y-1. In general, CWs effectively treated a variety of agricultural wastewaters, regardless of season.
KW - Agricultural wastewater
KW - Cold climate
KW - Constructed wetlands
KW - Water treatment
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U2 - 10.3390/w8050173
DO - 10.3390/w8050173
M3 - Review article
AN - SCOPUS:84971201949
SN - 2073-4441
VL - 8
JO - Water (Switzerland)
JF - Water (Switzerland)
IS - 5
M1 - 173
ER -
