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Constructed wetlands (CWs) are simple low-cost wastewater treatment units that use natural process to improve the effluent water quality and make it possible for its reuse. In the present study, a comparison is made between horizontal subsurface flow (HSSF-CW) and vertical flow (VFCW) constructed wetland in effectively post-treating the …
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The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal subsurface flow constructed wetlands. The two constructed wetlands operated initially for 2 years without the zeolite-filters (period A). Then, the zeolite-filters (fine- and coarse-grained clinoptilolite) were …
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Total nitrogen and ammonia removal prediction in horizontal subsurface flow constructed wetlands: use of artificial neural networks and development of a design equation ... Initial contaminant removal performance factors in horizontal flow reed beds used for treating urban wastewater. ... While the effluent quality of light rain runoff with ...
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The aim of this study was a comparison between PO 4 −3-P removal from sewage using zeolite as support medium in subsurface flow treatment wetlands (SSF TWs) operated with different oxidation-reduction potentials (ORPs).In addition, the zeolite's phosphate adsorption characteristics were evaluated. For this, Two mesocosm SSF TWs …
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Effluent quality performance of horizontal subsurface flow constructed wetlands using natural zeolite (tt) Shuib, N. School of Engineering, Deakin University, Pigdons …
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Effluent quality performance of horizontal subsurface flow constructed wetlands using natural zeolite (tt) Download Full text for this resource is not available from the …
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The facility consists of an anaerobic baffled reactor, a vertical flow CW and a polishing horizontal subsurface flow CW and has a total area demand of 2.5 m 2 /pe. The goal was to evaluate the system's efficiency and investigate the need for one or two CW stages to reach the national effluent reuse standard.
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The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal subsurface flow constructed …
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The aim of this research was to study the influence of the bed media configuration and particle size on the treatment efficiency of subsurface vertical flow (VF) constructed wetlands (CWs) treating municipal wastewater. Two outdoor pilot units (VF1 and VF2, planted with Phragmites australis) with the configuration C1 were operated in …
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Zeolite filters, placed downstream of horizontal subsurface flow constructed wetlands, have been found to significantly improve the effluent quality [18] (see …
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The efficiency of subsurface flow (SSF) constructed wetlands was evaluated on the treatment of secondary treated wastewater to improve the quality of the effluent for reuse purposes.
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The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal …
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This paper explores the feasibility and efficiency of a full-scale hybrid constructed wetland as a decentralized tertiary treatment facility to improve the quality of municipal secondary wastewater for reuse. The treatment wetland consists of a horizontal subsurface flow system (HSFCW) combined with a maturation pond (MP), with a …
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Results showed a significant improvement of the VFCW effluent quality at a residence time of 1 day. ... or separately in filter units for effluent treatment [8], [18], [19]. Zeolite filters, placed downstream of horizontal subsurface flow constructed wetlands, have been found to significantly improve the effluent quality [18] (see Supplemental ...
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The review revealed that the CW is an effective and sustainable technology for wastewater treatment with the initial influent level, microbial biofilm, detention time, plant species and ...
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Four small-scale cylindrical, vertical upward flow constructed wetland units were installed and evaluated to determine the effectiveness of these units to treat highway runoff. The highway runoff was collected during various rainfall events in the year 2009 from Lukou Viaduct section of Nanjing airport express highway. The natural zeolite and gravel …
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Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed wetlands using natural zeolite (clinoptilolite) AI Stefanakis, CS Akratos, GD Gikas, VA Tsihrintzis Microporous and Mesoporous Materials 124 (1-3), 131-143, 2009
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The comparison of the two work- Horizontal subsurface flow ing periods (with and without the presence of the zeolite-filters) showed that the addition of the two zeo- Organic …
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Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed wetlands using natural zeolite (clinoptilolite) ... The performance of the zeolite-filters appeared to be relatively unfluctuating throughout Pilot-scale units their entire operation period; nevertheless, higher removal rates were observed at higher ...
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Previous studies showed that zeolite filters treating the effluent of vertical flow and horizontal subsurface flow CWs increased pollutant retention (e.g., phosphorus, ammonia nitrogen, etc.) and ...
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As indicated, the systems have been operated in vertical flow. The vertical flow systems possess greater ability to transport oxygen than the horizontal subsurface flow beds. In addition, they are more effective for the mineralization of biodegradable organic matter and for nitrification in the presence of ammonia oxidizing bacterial activity [7].
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In order to construct an ecological treatment system for sewage plant effluent, horizontal subsur-face flow constructed wetlands (HSCWs) coupled with cellulosic carbon sources were investigated.
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Semantic Scholar extracted view of "Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed wetlands using natural zeolite (clinoptilolite)" by …
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The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal subsurface flow constructed wetlands.
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The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal subsurface flow constructed wetlands. The two constructed wetlands operated initially for 2 years without the zeolite …
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The results show that vertical flow constructed wetlands with zeolite–gravel substrate combination achieved the best performance between all systems with mean removal efficiency of 57 % TSS, 45 % COD and 78 % ammoniacal nitrogen. ... Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed …
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abstract This study designed two vertical flow constructed wetlands (VFCW) as a secondary treatment for piggery wastewater. The effect of effluent recirculation and substrate type on treatment efficiency of constructed wetlands on piggery waster was firstly investigated. Recirculation considerably improved the removal of NH4-N, total nitrogen …
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The removal efficiencies of two horizontal subsurface flow constructed wetlands (HSSF CWs, down-flow (F1) and up-flow (F2)) filled with the zeolite-slag …
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The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal subsurface flow constructed wetlands.
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The effects of micro-aeration and substrate selection on domestic sewage treatment performance were explored using three pairs (with or without micro-aeration) of horizontal subsurface flow (HSSF) constructed wetlands (CWs) filled with zeolite, ceramsite or quartz granules.
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