Model-based design of horizontal subsurface flow constructed treatment wetlands: a review

Rousseau, Diederik; Vanrolleghem, Peter A.; Pauw, Niels De

doi:10.1016/j.watres.2003.12.013

Cited by 313 publications

(126 citation statements)

References 24 publications

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“…For example, the widely cited NiRReLa model by Harrison et al [2009], which quantifies global nitrogen retention in lakes and reservoirs, applies the PFR formulation. Similarly, the most commonly used approach in the constructed wetland literature is to conceptualize the system as a PFR [Kadlec, 2000;Werner and Kadlec, 2000;Rousseau et al, 2004].…”

Section: Nutrient Retention Rate Constants Across Aquatic Ecosystemsmentioning

confidence: 99%

Biogeochemical hotspots: Role of small water bodies in landscape nutrient processing

Cheng

Basu

2017

Water Resources Research

193

157

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Increased loading of nitrogen (N) and phosphorus (P) from agricultural and urban intensification has led to severe degradation of inland and coastal waters. Lakes, reservoirs, and wetlands (lentic systems) retain these nutrients, thus regulating their delivery to downstream waters. While the processes controlling N and P retention are relatively well-known, there is a lack of quantitative understanding of how these processes manifest across spatial scales. We synthesized data from 600 lentic systems around the world to gain insight into the relationship between hydrologic and biogeochemical controls on nutrient retention. Our results indicate that the first-order reaction rate constant, k [T 21 ], is inversely proportional to the hydraulic residence time, s [T], across 6 orders of magnitude in residence time for total N, total P, nitrate, and phosphate. We hypothesized that the consistency of the relationship points to a strong hydrologic control on biogeochemical processing, and validated our hypothesis using a sediment-water model that links major nutrient removal processes with system size. Finally, the k-s relationships were upscaled to the landscape scale using a wetland size-frequency distribution. Results suggest that small wetlands play a disproportionately large role in landscape-scale nutrient processing-50% of nitrogen removal occurs in wetlands smaller than 10 2.5 m 2 in our example. Thus, given the same loss in wetland area, the nutrient retention potential lost is greater when smaller wetlands are preferentially lost from the landscape. Our study highlights the need for a stronger focus on small lentic systems as major nutrient sinks in the landscape. Plain Language Summary Excess nutrient pollution from intensive fertilizer use and farming operations poses an increasing threat to water quality worldwide. Lakes, streams, and wetlands restrict the movement of nutrients, and thus protect downstream waters. We have a limited understanding, however, of how removal processes are affected by the size and type of the water body. Based on a synthesis of data from lakes, reservoirs, and wetlands worldwide, we found that smaller water bodies tend to have higher nutrient removal rates. We applied our findings to the landscape scale and found that for the same wetland area lost, the loss of small wetlands corresponds to a greater loss in wetland nutrient removal potential. Such findings are significant to wetland protection and restoration efforts, which have historically focused on maximizing total wetland area rather than on preserving a distribution of different wetlands sizes within a landscape.

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Section: Nutrient Retention Rate Constants Across Aquatic Ecosystemsmentioning

confidence: 99%

Biogeochemical hotspots: Role of small water bodies in landscape nutrient processing

Cheng

Basu

2017

Water Resources Research

193

157

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“…Os modelos mais comumente utilizados para descrição da cinética de remoção do material orgânico em SACs são as equações de primeira ordem que predizem um decaimento exponencial da concentração afluente (Rousseau et al, 2004). Adaptações a este modelo foram propostas por Kadlec & Knight (1996), Reed et al (1995), Laber et al (1999), Cooper (1999), além de Brasil (2007b).…”

Section: Introductionunclassified

Cinética de remoção de matéria orgânica em sistemas alagados construídos cultivados com lírio amarelo

Chagas

Matos²,

Cecon³

et al. 2011

Rev. bras. eng. agríc. ambient.

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R ESU M OObjetivou-se, com a realização deste trabalho, obter o ajuste do modelo matemático adaptado de cinética de primeira ordem e os respectivos parâmetros cinéticos para descrição da degradação da matéria orgânica em SACs cultivados com lírio amarelo (Hemerocallis flava), no tratamento de esgoto doméstico. Os SACs foram cultivados com lírio amarelo e submetidos a diferentes taxas de carregamento orgânico superficial (TCOs) de esgoto doméstico: 44; 98; 230 e 395 kg ha -1 d -1 de DBO. O modelo matemático adaptado de decaimento do material orgânico apresentou bom ajuste e descreveu adequadamente a cinética de remoção de matéria orgânica (DQO) nos sistemas avaliados apresentando, geralmente, R 2 superior a 75%. Em ordem crescente de TCO valores de coeficientes de degradação (Kv) foram, respectivamente, de 0,45; 0,69; 1,23 e 1,72 d -1 , considerados baixos para os dois primeiros SACs e normais para os outros dois, e os valores de "n" de 0,448; 0,107; 0,327 e 0,461, na faixa normalmente encontrada na literatura. Palavras-chave: wetlands construídos, plantas ornamentais, cinética de degradaçãoOrganic matter removal kinetics in constructed wetlands cultivated with yellow lily A B ST R A C T This work aimed to obtain the adjustment of the mathematical model adapted from the first order kinetics and its respective parameters for describing the organic matter degradation in constructed wetlands (CWs) planted with yellow lily (Hemerocallis flava) for the treatment of domestic sewage. The CWs were cultivated with yellow lily and subjected to different surface organic loading rates (TCOs) of domestic sewage: 44, 98, 230 and 395 kg ha -1 day -1 BOD. The mathematical model adapted from the decay of organic material showed a good fit and adequately described the kinetics of removal of organic matter (COD) in the evaluated systems, with generally more than 75% R 2 . In ascending order of TCO values of degradation coefficients (Kv) were, respectively, of 0.45, 0.69, 1.23 and 1.72 d -1 , considered low for the first two CWs and normal for the other two, and the values of "n" of 0.448, 0.107, 0.327 and 0.461 in the range normally found in the literature.

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“…Despite its limitations [62], the area-based first-order model (Equation (1)) has become the most widely used representation of CW removal kinetics [63]:…”

Section: Areal Rate Constantmentioning

confidence: 99%

Constructed Wetlands for Agricultural Wastewater Treatment in Northeastern North America: A Review

Rozema

VanderZaag

Wood

et al. 2016

Water

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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 (BOD 5 ), total suspended solids (TSS), E. coli, fecal coliforms, total Kjeldahl nitrogen (TKN), ammonia/ammonium (NH 3 /NH 4 + -N), nitrate-nitrogen (NO 3´-N), and total phosphorus (TP). Average concentration reductions were: BOD 5 81%, TSS 83%, TKN 75%, NH 4 + -N 76%, NO 3´-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 (k a , m¨y´1) were: BOD 5 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, NH 4 + -N 3.3 m¨y´1, NO 3´-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.

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Model-based design of horizontal subsurface flow constructed treatment wetlands: a review

Cited by 313 publications

References 24 publications

Biogeochemical hotspots: Role of small water bodies in landscape nutrient processing

Biogeochemical hotspots: Role of small water bodies in landscape nutrient processing

Cinética de remoção de matéria orgânica em sistemas alagados construídos cultivados com lírio amarelo

Constructed Wetlands for Agricultural Wastewater Treatment in Northeastern North America: A Review

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