Potential for total nitrogen removal by combining vertical flow and horizontal flow constructed wetlands: A full-scale experiment study

Molle, Pascal; Prost-Boucle, Stéphanie; Liénard, A.

doi:10.1016/j.ecoleng.2008.05.016

Cited by 134 publications

(65 citation statements)

References 12 publications

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“…HF CWs have been successfully tested for milking parlor/dairy waste water treatment in different parts of world (Kern and Bretter, 2002;Montavi, et al, 2002Montavi, et al, , 2003Hill, et al, 2003). VF CWs posses aerobic environment which provide nitrates (Molle et al, 2008) and also have advantage of reduced footprints. They have also been tested for variety of wastewaters including milking parlor/dairy wastewater (Veenstra, 1998;Kern and Idler, 1999).…”

Section: Ssf Cws Can Be Differentiated As Horizontal Sub-surface Flowmentioning

confidence: 99%

Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Sharma

Inoue

Kato

et al. 2013

Ecological Engineering

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Section: Ssf Cws Can Be Differentiated As Horizontal Sub-surface Flowmentioning

confidence: 99%

Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Sharma

Inoue

Kato

et al. 2013

Ecological Engineering

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“…Just slight influence of temperature on COD removal was detected (Table 4), which was also documented by others, [26,27] due to the microbial processes responsible for organic matter degradation could still proceed even when temperature declined to 5 C. [28] Nitrogen removal and the influences of crucial factors…”

Section: ¡1mentioning

confidence: 64%

“…It was abundantly reported that the nitrogen mass removal rates increased with the increasing LRs in CWs, [3,9,21,24,27,30] and higher TN removal rates were also achieved at the high LR in the IVCW systems. Nevertheless, it was generally recorded that the increase was slight or leveled off or even dropped considerably when the LR was too high, [21,22,24,30] probably due to more severe restriction of environmental conditions for microbial nitrogen removal processes.…”

Section: ¡1mentioning

confidence: 99%

Comparative evaluations of organic matters and nitrogen removal capacities of integrated vertical-flow constructed wetlands: Domestic and nitrified wastewater treatment

Chang

Liang

et al. 2015

Journal of Environmental Science and Health, Part A

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Two groups of integrated vertical-flow constructed wetland (IVCW) microcosms were established for treating two types of representative wastewater: domestic and nitrified wastewater under two loading rates (LRs) over about two years. Their removal capacities of organic substance and nitrogen as well as the effects of loading rate (LR), outflow temperature and dissolved oxygen (DO) concentration were investigated and compared. Efficient chemical oxygen demand (COD) eliminations were achieved by the IVCWs, with the mass removal rates increasing linearly with the increasing LRs strongly, achieving average value of 56.07 g m ¡2 d¡1 at the highest loading rate. Nevertheless, the effluent COD concentrations also increased, with the average value exceeding Class I A discharge standard (< 50 mg L ¡1 ) for municipal wastewater treatment plants in China at the highest loading rate. Greater total nitrogen (TN) mass removal rates but lower efficiencies were obtained at the high LR for both types of wastewater, and better removal was achieved for nitrified wastewater (NW) in comparison to domestic wastewater (DW), probably due to the prevailing anoxic conditions inside the IVCW beds restricted nitrification process of DW. The influences of LR, temperature and DO on COD removal were slight, but all remarkable on TN reduction. As compared to DO, temperature was more crucial for nitrogen removal, and the temperature dependence coefficient for TN removal of low LR of NW was significantly greater than others.

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“…For instance, Ye et al (2012) employed HLRs of 300 and 500 L/m 2 day in studies on the oxygenation of VFs. Molle et al (2008) applied HLRs in the range 380-510 L/m 2 day, while those of COD and SS were 167-180 and 53-64 g/m 2 day, respectively, when studying nitrogen removal in a full-scale hybrid TW.…”

Section: Performance Of the Ovfmentioning

confidence: 99%

Clogging reduction and removal of hormone residues with laboratory-scale vertical flow organic-based filter and hybrid wetland

Melián

Torres-Padrón

Betancor-Abreu

et al. 2014

Int. J. Environ. Sci. Technol.

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A laboratory-scale, intermittently fed, organicbased vertical flow filter was tested as a pre-treatment of high-strength urban wastewater to reduce the risk of clogging in treatment wetlands. At an average hydraulic loading rate of 815 L/m 2 day and average surface loading rates of biological oxygen demand of 458 g/m 2 day, chemical oxygen demand of 594 g/m 2 day and suspended solids of 310 g/m 2 day, the organic-based vertical flow filter achieved removal efficiencies of 48 % of biological oxygen demand, 45 % of chemical oxygen demand, 69 % of suspended solids and 51 % of turbidity. For this unit, removals were significantly correlated with organic surface loading rates but not with hydraulic loading rate. Additionally, the organic-based vertical flow filter removed almost completely the hormone residues studied: estrone, 17b-estradiol, 17b-ethynyl estradiol, diethylstilbestrol, estriol, norethisterone and testosterone, most probably by the combination of adsorption onto the organic substrate and biodegradation. The efficiency of the combined system was remarkable for biological oxygen demand (97 %), chemical oxygen demand (89 %), suspended solids and turbidity (99 %), fecal coliforms and E. coli (99.9 %) and fecal enterococci (99 %).

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Potential for total nitrogen removal by combining vertical flow and horizontal flow constructed wetlands: A full-scale experiment study

Cited by 134 publications

References 12 publications

Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Seasonal efficiency of a hybrid sub-surface flow constructed wetland system in treating milking parlor wastewater at northern Hokkaido

Comparative evaluations of organic matters and nitrogen removal capacities of integrated vertical-flow constructed wetlands: Domestic and nitrified wastewater treatment

Clogging reduction and removal of hormone residues with laboratory-scale vertical flow organic-based filter and hybrid wetland

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