Improving the treatment efficiency of constructed wetlands with zeolite-containing filter sands

Bruch, Ingo; Fritsche, Johannes; Bänninger, D.; Alewell, Ulrike; Sendelov, Michael; Hürlimann, Heinz; Hasselbach, Ralf; Alewell, Christine

doi:10.1016/j.biortech.2010.09.041

Cited by 103 publications

(55 citation statements)

References 26 publications

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“…Another interesting feature of the mulch is its hygroscopicity which was determined to be about 10% in weight. A highly hygroscopic substrate would improve plant root growth, biofilm establishment and stability, providing longer HRT and consequently better treatment performance [42]. Moreover, the smaller particle size and hygroscopicity of the mulch can help to better distribute the influent inside the reactor, thus reducing the negative effects of shortcuts and preferential paths.…”

Section: Effect Of Influent Feeding Mode (Pulse Vs Continuous)mentioning

confidence: 99%

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Melián

Borreguero-Fabelo

Araña

et al. 2018

Water

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Abstract:A hybrid constructed wetland mesocosm has been used for the treatment of raw urban wastewater. The first stage was a mulch-based, subsurface, horizontal flow constructed wetland (HF). The HF achieved good removals of COD (61%; 54 g/m 2 ·day) and Total Suspended Solids (84%; 29 g/m 2 ·day). The second stage was composed of vertical flow constructed wetlands (VF) that were employed to study the effect of substrate (gravel vs. mulch), feeding mode (continuous vs. intermittent) and the number of stages (1 vs. 2) on performance. High hydraulic and organic surface loadings (513-583 L/m 2 ·day and 103-118 g/m 2 ·day of COD) were applied to the reactors. The mulch was more efficient than gravel for all the parameters analyzed. The continuous feeding allowed a 3 to 6-fold reduction of the surface area required.

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Section: Effect Of Influent Feeding Mode (Pulse Vs Continuous)mentioning

confidence: 99%

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Melián

Borreguero-Fabelo

Araña

et al. 2018

Water

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“…Zeolite owns a highly adsorbent ability for P in wastewater [26]. In addition, zeolite enhances the HRT by increasing the capacity for shrinkage and swelling in the mixed substrate [27]. The steel slag filler is selected as one of the substrates in our experiments.…”

Section: Purifying Effect On the Phosphorusmentioning

confidence: 99%

Polishing of Secondary Effluent by a Two-Stage Vertical-Flow Constructed Wetland

Zhang¹,

Tan²,

Li³

et al. 2015

Pol. J. Environ. Stud.

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“…The two most common forms of N in wetlands are organic and inorganic. Organic N is made up of a variety of compounds, including amino acids, urea and uric acid, and purines and Constructed wetlands (CWs) are rapidly becoming a viable method for wastewater treatment worldwide [7], because of their similarity to natural wetlands and the fact that they cost less to construct, implement, and maintain than other types of treatments [8,9]. Constructed wetlands can be used to prevent water eutrophication [10].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Removal in a Horizontal Subsurface Flow Constructed Wetland Estimated Using the First-Order Kinetic Model

Cui

Zhang

et al. 2016

Water

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Abstract:We monitored the water quality and hydrological conditions of a horizontal subsurface constructed wetland (HSSF-CW) in Beijing, China, for two years. We simulated the area-based constant and the temperature coefficient with the first-order kinetic model. We examined the relationships between the nitrogen (N) removal rate, N load, seasonal variations in the N removal rate, and environmental factors-such as the area-based constant, temperature, and dissolved oxygen (DO). The effluent ammonia (NH 4 + -N) and nitrate (NO 3 − -N) concentrations were significantly lower than the influent concentrations (p < 0.01, n = 38). The NO 3 − -N load was significantly correlated with the removal rate (R 2 = 0.96, p < 0.01), but the NH 4 + -N load was not correlated with the removal rate (R 2 = 0.02, p > 0.01). The area-based constants of NO 3 − -N and NH 4 + -N at 20 • C were 27 ± 26 (mean ± SD) and 14 ± 10 m·year −1 , respectively. The temperature coefficients for NO 3 − -N and NH 4 + -N were estimated at 1.004 and 0.960, respectively. The area-based constants for NO 3 − -N and NH 4 + -N were not correlated with temperature (p > 0.01). The NO 3 − -N area-based constant was correlated with the corresponding load (R 2 = 0.96, p < 0.01). The NH 4 + -N area rate was correlated with DO (R 2 = 0.69, p < 0.01), suggesting that the factors that influenced the N removal rate in this wetland met Liebig's law of the minimum.

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Improving the treatment efficiency of constructed wetlands with zeolite-containing filter sands

Cited by 103 publications

References 26 publications

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Effect of Substrate, Feeding Mode and Number of Stages on the Performance of Hybrid Constructed Wetland Systems

Polishing of Secondary Effluent by a Two-Stage Vertical-Flow Constructed Wetland

Nitrogen Removal in a Horizontal Subsurface Flow Constructed Wetland Estimated Using the First-Order Kinetic Model

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