Nutrient removal in a pilot and full scale constructed wetland, Putrajaya city, Malaysia

Sim, C. H.; Yusoff, Mohd Kamil; Shutes, Brian; Ho, Sinn Chye; Mansor, Mashhor

doi:10.1016/j.jenvman.2007.03.011

Cited by 80 publications

(30 citation statements)

References 19 publications

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“…More than 85% TP were removed from the input in all constructed wetlands. Performances were superior over those observed in HSSF CWs ranged from 30% to 60% [3,[29][30][31][32]. The high removal efficiency was considered as a consequence of substrate which was rich in CaCO 3 .…”

Section: Phosphorus Removalmentioning

confidence: 96%

Effect of limited artificial aeration on constructed wetland treatment of domestic wastewater

et al. 2010

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Section: Phosphorus Removalmentioning

confidence: 96%

Effect of limited artificial aeration on constructed wetland treatment of domestic wastewater

et al. 2010

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“…To this end, constructed wetland (CW) is therefore considered to treat the reject water since it has been increasingly applied worldwide as a low-cost technology for various wastewater treatment including nutrient removal (Prochaska and Zouboulis, 2006;Vymazal, 2007;Sim et al, 2008). More significantly, a novel CW system employing dewatered alum sludge as main substrate to serve as P adsorbent and biofilm carrier has been recently developed (Zhao et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

Yang

Zhao

Wang³

et al. 2011

Water Science and Technology

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This study examined a novel reuse of alum sludge, an inescapable by-product of drinking water treatment process when aluminium salt is added as a coagulant, as the main medium in a laboratory-scale multi-stage constructed wetland (CW) system for reject water treatment. Such reject water is a main concern in municipal wastewater treatment plant (MWWTP) for increasing the organic and nutrient loading. A ‘tidal flow’ strategy was employed to enhance the wetland aeration to stimulate organic matters (OM) and ammoniacal-nitrogen (N) oxidation while the ‘step feed’ operation was adopted to supply the necessary amount of carbon source for denitrification. The results reveal that alum sludge acting as P adsorbent can secure the P removal. Meanwhile, high removals of N and OM can also be obtained due to the active bacteria growth on the alum sludge surface. The results show that average removal efficiencies of 65.4 ± 12.3% for chemical oxygen demand (COD), 67.8 ± 9.2% for five-day biochemical oxygen demand (BOD5), 33.6 ± 17.0% for N and 99.5 ± 0.49% for P can be achieved over a period of 190 days. This indicates that novel reuse of alum sludge as medium in CW system can provide a promising approach for reject water treatment. Therefore, it will significantly reduce the amount of pollutant feedback through reject water recycling in a MWWTP.

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“…In this way, zeolite can therefore reduce the amount of NH 4 which can affect the amount of NO 3 produced in the nitrification process. Some researches show a removal of (82%) to (99%) for NO 3 -N [15] , (89%) for nitrate [16] and (70.73%) for NO 3 -N [17] . Constructed wetlands with subsurface flow have the major potential for phosphorus removal as adsorption and precipitation of P is effective in such systems where wastewater gets in contact with filtration substrate via these mechanisms.…”

Section: Discussionmentioning

confidence: 99%

Wastewater Treatment Using Horizontal Subsurface Flow Constructed Wetland

Mohammad¹

2009

American J. of Environmental Sciences

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Abstract:The last few decades witnessed sharp focus on environment pollution and its impact on life in nature. Wetlands can be used for biological treatment of wastewater. Problem statement: Scarcity of water is considered as a global problem and Iran is one the countries which is facing water shortage problem. Pollution of water bodies restrict the availability of water for various uses. Treatment of waste water before disposal contributes to water conservation efforts. Constructed wetlands are techniques aim to polish water quality and reduce the harmful effect of effluent. Approach: In this study, four horizontal subsurface flow wetlands (HSSF) were constructed at the Research Station of Tehran University, located in Karaj, Iran. The study was carried out from April to September, 2007. Gravel and zeoilte were used in this study as substrate. Gravel-beds with and without plants (called GP and G) and gravel-beds mixed with (10%) zeolite, with and without plants (called ZP and Z) were examined to investigate the feasibility of treating synthetic wastewater which was specifically produced and modified to imitate agricultural wastewater. Results: The results of this study indicated that the system had acceptable pollutant removal efficiency and that both plants were found to be tolerant under the tested conditions. The wetland system could achieve the NO 3 -N removal of (79%) in ZP, (86%) in Z, (82%) in GP and finally (87.94%) in G. As for the P removal, the efficiencies of 93, 89, 81 and 76% were respectively achieved for ZP, GP, Z and G. The outflow concentrations of Pb and Cd were found to be under the detection limit; however, as for Zn, the removal efficiencies of 99.9, 99.76, 99.71 and 99.52% were concluded for ZP, Z, GP and G respectively. Conclusions/Recommendations: It can be concluded that constructed wetlands are efficient in removing Zn, Pb and Cd from agricultural wastewater. Plants types such as Phragmites Australis and Juncus Inflexus can contribute in treating wastewater, while Zeolite and gravel materials provide a suitable plant growth medium to replace conventional sand and gravel substrates. So it is highly recommended to use Constructed wetland for treating wastewater before disposal.

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Nutrient removal in a pilot and full scale constructed wetland, Putrajaya city, Malaysia

Cited by 80 publications

References 19 publications

Effect of limited artificial aeration on constructed wetland treatment of domestic wastewater

Effect of limited artificial aeration on constructed wetland treatment of domestic wastewater

A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

Wastewater Treatment Using Horizontal Subsurface Flow Constructed Wetland

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