Constructed Wetlands for Agricultural Wastewater Treatment in Northeastern North America: A Review
AbstractConstructed 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/NH4+-N), nitrate-nitrogen (NO3−-N), and total phosphorus (TP). Average concentration reductions were: BOD5 81%, TSS 83%, TKN 75%, NH4+-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. View Full-Text
Share & Cite This Article
Rozema, E.R.; VanderZaag, A.C.; Wood, J.D.; Drizo, A.; Zheng, Y.; Madani, A.; Gordon, R.J. Constructed Wetlands for Agricultural Wastewater Treatment in Northeastern North America: A Review. Water 2016, 8, 173.
Rozema ER, VanderZaag AC, Wood JD, Drizo A, Zheng Y, Madani A, Gordon RJ. Constructed Wetlands for Agricultural Wastewater Treatment in Northeastern North America: A Review. Water. 2016; 8(5):173.Chicago/Turabian Style
Rozema, Eric R.; VanderZaag, Andrew C.; Wood, Jeff D.; Drizo, Aleksandra; Zheng, Youbin; Madani, Ali; Gordon, Robert J. 2016. "Constructed Wetlands for Agricultural Wastewater Treatment in Northeastern North America: A Review." Water 8, no. 5: 173.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.