A system composed of two horizontal subsurface flow constructed wetlands operating in parallel was evaluated for the post-treatment of UASB (upflow anaerobic sludge blanket) reactor effluent, for a population equivalent of 50 inhabitants per unit. One unit was planted with cattail (Typha latifolia) and the other was unplanted.

Using the innovative effluent outlet device, the COD removal performance exceeds that of the conventional device by 10%. The improvement of the yield will allow the reduction of wetland surfaces for the same treatment horizon or the same pollutant load. Keywords: Artificial Wetlands, Horizontal Wetland, Subsurface Flow 1. Introduction.

Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed wetlands using natural zeolite (clinoptilolite). Microporous and Mesoporous Materials 2009, 124 (1-3), 131-143. DOI: 10.1016/j.micromeso.2009.05.005.

267 kg N/ha•yr in subsurface flow constructed wetlands indicating a ible use of subsurface flow constructed poss wetland systems for nitrate-rich water with a low content of BOD (e.g. nitrified effluent or agricultural drainage) (Zhai et al., 2013). Another study investigated the effect of temperature on nitrogen removal, microironment and -env

The treatment system consists of: a primary screening and a grit removal tank; sedimentation tank for sludge settling and equalization tank connected with horizontal subsurface flow constructed wetland (HSSFCW), with an effective volume of 1.92 m 3 each which is a length of 4 m, width of 0.8 m and effective depth of 0.6 m (Fig. 3).

The removal efficiencies of two horizontal subsurface flow wetlands were also investigated by He and others, associated with the output zones of the effluent, one of downflow (F1) and the other of upflow (F2), both filled with the hybrid substrate zeolite-slag for the treatment of leachates in rural landfills.

10. AKRATOS C.S., TSIHRINTZIS V.A. Effect of temperature, HRT, Vegetation and porous media on removal efficiency of pilot-scale horizontal subsurface flow constructed wetlands. Water Res. 29, 173, 2008. 11. MATAMOROS V., GARCÍA J., BAYONA J.M. Organic micropollutant removal in a full-scale surface flow constructed wetland fed with secondary ...

Abstract In 2001, to foster the practical development of constructed wetlands (CWs) used for domestic wastewater treatment in Turkey, vertical subsurface flow constructed wetlands (30 m2 of each) were implemented on the campus of the METU, Ankara, Turkey. The main objective of the research was to quantify the effect of different filter media on the treatment performance of vertical flow ...

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

Effluent, Biomass. A horizontal subsurface flow constructed wetland is a large gravel and sand-filled basin that is planted with wetland vegetation. As wastewater flows horizontally through the basin, the filter material filters out particles and microorganisms degrade the organics. The filter media acts as a filter for removing solids, a fixed ...

stable operation of the wetland system. The VFCW effluent concentrations of COD, TN, and TP were less than 30 mg·L-1, 1.5 mg·L-1, and 0.3 mg·L-1, respectively, which can meet the environmental quality standards for surface water in China. Because of the special design, the better performance of the VFCW was that it allowed

Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed wetlands using natural zeolite (clinoptilolite) ... the performance of the zeolite-filters depends on the performance and operation of the previous wetland units. g 35 Air temperature In subsurface flow constructed wetlands, the porous media and Wastewater ...

Three horizontal subsurface flow (HSF) pilot-scale constructed wetland (CW) units operated for 3 years treating municipal wastewater originating from a university campus. The main objective of the study was the evaluation of the performance of these systems under several operational, design, and …

Modified zeolite has been broadly reported for removing pollutants in water recently, however, no such review has been published. This review concludes the preparation methods and mechanism of modified zeolite, provides an overall assessment on the choice of modification methods in different water quality conditions, summarizes the application of modified zeolite for wastewater treatment, and ...

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 zeolite 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 ...

EVALUATING THE PERFORMANCE OF SUBSURFACE HORIZONTAL FLOW CONSTRUCTED ... High quality effluent that can be discharged to surface waters could be achieved by using the two stage leachate treatment systems with a constructed wetland at the final stage. This pilot scale study was conducted with the aim of ... effluent. 19 Figure 3.5.b Yellow ...

subsurface flow systems. Further, subsurface flow systems can be classified according to flow direction as vertical or horizontal. This study considers horizontal subsurface flow constructed wetlands (HSFCWs) which introduces the mechanistic, dynamic compartmental model-Constructed Wetlands 2D (CW2D).

Effluent quality improvement of two pilot-scale, horizontal subsurface flow constructed wetlands using natural zeolite (clinoptilolite). Microporous and Mesoporous Materials 124 (1-3), 131-143. Stefanakis, A.I., Tsihrintzis, V.A., 2009.

The performance of horizontal subsurface flow constructed wetland (HFCW) for rural domestic sewage treatment has been evaluated. The system was built as a tertiary treatment after the biological processes to improve the effluent wastewater quality. The HFCW was operated in three phases under different hydraulic loading rates (HLRs), and with ...

as a horizontal subsurface-flow reed bed can be installed to improve the effluent quality before discharge to the subsoil. On-site research was thus carried out to assess and compare the treatment capabilities of freely-draining subsoils receiving both septic tank and secondary effluents in tandem

The latter are subsurface horizontal flow wetlands systems (Fig. 2) and subsurface vertical flow wetland systems (Fig. 3), [3-6]. ... a VFCW and a zeolite tank, Gicas and Tsihrintzis have studied wastewater treatment [25]. ... Better effluent quality as compared with to conventional single-stage VFCW was obtained.

A pilot scale study was undertaken in Juja (Kenya) to assess the performance of horizontal subsurface flow–constructed wetlands (HSSF-CWs) under tropical conditions. Primary domestic wastewater effluent was continuously fed into three replicate wetland cells, each with an area of 22.5 m 2 ( 7.5 × 3 m ) and with gravel as substrate.

12%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 effluents from the secondary …

Nor Lila Shuib, Kanagaratnam Baskaran, Shobha Muthukumaran and Warren Davies (2011), Effluent Quality Performance of Horizontal Subsurface Flow Constructed Wetlands using Natural Zeolite, ICESE 2011, April 1-3, 2011, Bali Island, Indonesia, pp 19-23.

The performance of natural zeolite is presented in providing additional treatment of the effluent of two pilot-scale, horizontal subsurface flow const…

Fifteen microcosm-scale reactors simulating horizontal flow constructed wetlands were disposed in a greenhouse in triplicate. Five substrates (river gravel, gravel, LECA, river gravel + zeolite and gravel + zeolite) were evaluated. Real effluent with previous treatment was used.

Introduction. Constructed wetlands (CWs) with horizontal subsurface flow (HSF) represent a suitable and low-cost technology commonly used for wastewater treatment in small communities, but also widely used in large plants as tertiary (polishing) treatment following secondary biological treatment (Cooper 2009).Used as tertiary treatments, HSF-CW systems are able to further …

Abstract-Two types of unvegetated vertical flow constructed wetlands (UVFCWs) with zeolite and volcanic rock as composite substrates were constructed and the treatment performance for nutrient removal from modeling effluent of secondary treatment process was evaluated. The concentration of COD, NH4 +-N, NO 3--N, NO 2--N and DO

The purification of the primary treated domestic sewage was performed in the present study through the horizontal sub-surface flow constructed wetland (CW) of 10 × 3.5 m dimension. The study was performed using three setups of CW 1 (Unplanted CW), CW 2 (CW planted with macrophyte Typha latifolia), and CW 3 (CW planted with two species of macrophyte T. latifolia and Commelina …

compare the performance of a free water surface constructed wetland (FWS) to a horizontal subsurface constructed wetland (SF) for graywater treatment and to assess their ability to meet water quality standards for surface discharge and reuse. This was done by comparison of …

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 ...

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 this study used the horizontal flow system for the tertiary treatment of wastewater effluent from secondary basins at Al-Rustamiya wastewater treatment plant / old project / Baghdad / Iraq. the Phragmites Australis plant ...