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Potential Application of Chilean Natural Zeolite as a ...

This study aims to evaluate the sorption characteristics of NH 4 + -N and PO 4 3 − -P onto the surface of natural zeolites coming from Chile and their potential application in the subsurface-flow treatment wetlands for wastewater treatment in rural areas. For this purpose, adsorption experiments onto the zeolite were developed in batch assays. The effects of the adsorbent …

Horizontal Gene Transfer of PIB-Type ATPases among ...

Horizontal Gene Transfer of P IB-Type ATPases among Bacteria Isolated from Radionuclide- and Metal-Contaminated Subsurface Soils Robert J. Martinez, 1 Yanling Wang, 2 Melanie A. Raimondo, 1 Jonna M. Coombs, 3 Tamar Barkay, 4 and Patricia A. Sobecky 1, *

(PDF) Effect of outlet water level raising and effluent ...

Horizontal subsurface flow (HSF) constructed wetlands are commonly used systems in the USA (Vymazal, 2005). Research on these systems is targeting today on optimizing and enhancing their performance. Two ways to do this are examined here: partial effluent recirculation and outlet water level raising above the porous media.

Horizontal Flow Constructed Wetlands (HFCW) | SSWM - Find ...

Constructed wetlands with horizontal sub-surface flow (HF CWs) have been used for wastewater treatment for more than four decades. HF CWs are used around the world for many types of wastewater, including municipal sewage, agricultural and industrial wastewaters, runoff waters, wastewaters containing endocrine-disrupting chemicals, and landfill ...

Wastewater treatment using horizontal subsurface flow ...

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 …

Treatment of Synthetic Wastewater Using Horizontal ...

Constructed wetland is an effective wastewater treatment technology which is used in worldwide. Nevertheless, the effectiveness of using this wastewater treatment is depending on

Developing horizontal subsurface flow constructed wetland ...

Jul 03, 2021· Horizontal subsurface flow constructed wetland with pumice substrate and Chrysopogon zizanioides plant species has a potential to treat high strength tannery wastewater by different mechanisms including adsorption, filtration, microbial activities and plant uptake. Therefore the use of such kind of constructed wetland with locally-available low ...

Dairy farm wastewater treatment using horizontal ...

Sep 26, 2016· (2017). Dairy farm wastewater treatment using horizontal subsurface flow wetlands with Typha domingensis and different substrates. Environmental Technology: Vol. 38, 6th International Symposium on Wetland Pollutant Dynamics and Control (WETPOL) and the Annual Conference of the Constructed Wetland Association, pp. 192-198.

Nutrients and Organic Matter Removal in a Vertical-Flow ...

Oct 02, 2013· A combined subsurface vertical and horizontal flow constructed wetland system was designed for rular domestic wastewater treatment . Several water quality parameters pH, BOD, COD, TSS, TKN, TP and faecal bacteria's number in both raw and treated wastewaters were monitored during a macrophytes life cycle.

The removal of arsenic and metals from highly acidic water ...

A laboratory-scale horizontal subsurface flow constructed wetland system was used to quantify the arsenic removal capacity in the treatment of highly acidic, arsenic and metal-rich water: pH ≈ 2, Fe ≈ 57 mg/L, Pb ≈ 0.9 mg/L, Zn ≈ 12 mg/L.

__,horizontal subsurface …

Aug 07, 2016· 3) subsurface horizontal-flow wetland. . 4) horizontal flow artificial wetland. . 5) subsurface constructed wetland. . 1. Pretreatment EFFects of Yellow River raw water by subsurface constructed wetland in low temperature; . 2.

Treatment of farmer tourism wastewater using ...

Abstract A full-scale hybrid system utilizing horizontal subsurface flow constructed wetlands (HFCWs) with iron-carbon micro-electrolysis (ICME) pre-treatment was developed for farmer tourism wastewater (FHTWW) treatment in Wuhan, Hubei Province, China. Results of the 12 months study revealed that the optimal iron-to-active carbon mass ratio (Fe/C), initial …

Treatment of Grey water Using Horizontal Flow Constructed ...

S. Sarafraz and his team (2009) studied 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

Constructed Wetland (Lahan Buatan) – Bimastyaji's Blog

Jan 30, 2017· Vertical Subsurface Flow mempunyai kapasitas transfer oksigen yang lebih besar untuk menghasilkan nitrifikasi yang baik; Vertical Subsurface Flow sangat lebih kecil dibandingkan sistem Horizontal Subsurface Flow, Vertical Subsurface Flow dapat menyisihkan BOD5, COD dan pathogens secara efisien. Daftar Pustaka. Bahlo, K., Wach, G. 1995.

Effectiveness of two-stage horizontal subsurface flow ...

Sep 28, 2020· Agro-industrial wastewaters in Ethiopia cause severe environmental pollution problems. Research evidence showed that anaerobic reactors are good options for the treatment of these wastewaters. But, their final effluent does not meet the discharge standards. Conversely, a series stage horizontal subsurface flow constructed wetland (HSSFCW) system is …

Evaluating the performance of horizontal subsurface flow ...

Abstract. The objective of the present study was to assess the simultaneous removal of physiochemical parameters in moderate strength wastewater using a lab scale horizontal subsurface flow constructed wetland (HFCW) with natural zeolite as a substrate.

Nutrients and Organic Matter Removal in a Vertical-Flow ...

A combined subsurface vertical and horizontal flow constructed wetland system was designed for rular domestic wastewater treatment [22]. Several water quality parameters pH, BOD, ... a VFCW and a zeolite tank, Gicas and Tsihrintzis have studied wastewater treatment [25]. The zeolite was found to offer additional removal of nitrogen, total

Removal of dimethylphenols and ammonium in laboratory ...

Oct 10, 2017· The removal efficiency of dimethylphenol and ammonium nitrogen was studied, for the first time, in three different laboratory‐scale horizontal subsurface flow constructed wetlands planted with Juncus effusus. Two of the wetlands used were filled with gravel. One of these was planted and the second left without vegetation.

Evaluating the performance of different media in a ...

sub-surface horizontal flow zeolite: Summary The treatment efficiency of a wetland system requires a balance between pollutant loading rate and hydraulic retention time (HRT), hydraulic loading rate (HLR) and the suitable substrate to be used. The aim of this study was to investigate the treatment efficiency of horizontal subsurface flow ...

Mechanism and Influencing Factors of Nitrogen Removal in ...

Impact of different feeding strategies and plant presence on the performance of shallow horizontal subsurface-flow wetlands [J]. Science of The Total Environment, 2007, 378 (3): 253-262. Dong Qing Zhang, Soon Keat Tan, Richard M Gersberg, et al. Nutrient removal in tropical subsurface flow wetlands under batch and continuous flow conditions [J].

Comparison of horizontal and vertical constructed wetland ...

The effect of different bedding material (gravel and zeolite surface) was also investigated. A pilot-scale study was conducted on subsurface flow constructed wetland systems operated in vertical and horizontal mode. Two vertical systems differed from each other with their bedding material.

Horizontal Subsurface Drainage Theories For Agricultural ...

Horizontal Subsurface Drainage Theories For Agricultural|Chhedi Lal, Professional Knowledge (Issues in Education)|John Hoyle, Tall Man's Woman (Dales Western)|Jake Douglas, Old Master Drawings from Chatsworth|Michael Jaffe

Diversity and Abundance of Ammonia-Oxidizing Bacteria in ...

The diversity and abundance of ammonia-oxidizing bacteria was investigated in three different types of horizontal subsurface flow constructed wetlands, reed (Phragmites australis)/gravel bed (W1), hybrid vegetation {reed, cattail (Typha latifolia), bulrush (Scirpus validus)}/gravel bed (W2) and reed/hybrid substrates bed (gravel, zeolite, slag) (W3).

Estimating subsurface horizontal and vertical velocities ...

Estimating subsurface horizontal and vertical velocities from sea-surface temperature by J. H. LaCasce 1 and A. Mahadevan 2 ABSTRACT We examine a dynamical method for estimating subsurface elds (density, pressure, horizontal and vertical velocities) in the upper ocean using sea-surface temperature (SST) and a climatologi-

Wastewater Treatment Using Horizontal Subsurface Flow ...

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. ... while Zeolite and gravel materials provide a suitable plant growth medium to replace conventional sand and gravel substrates ...

(PDF) Evaluating the Performance of Horizontal Subsurface ...

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

Subsurface flow constructed wetlands for the treatment of ...

Jul 02, 2017· This thesis describes in detail the background, methods, results, and conclusions of a three-year PhD research project - "subsurface flow constructed wetlands for the treatment of domestic wastewater", which was undertaken at Monash University between April 2008 and December 2010. The overall objective of the research was to discover the efficiencies of key …

Performance evaluation of different horizontal subsurface ...

Aug 20, 2021· Performance evaluation of different horizontal subsurface flow wetland types by characterization of flow behavior, mass removal and depth-dependent contaminant load () BTEX

Chapter 4 Construction Details - Caltrans

Page 4-68.2 Subsurface Drains 4-6801B Horizontal Drains Horizontal drains are made from 1-1/2-inch schedule 80 polyvinyl chloride (PVC) pipes. Horizontal drains can be slotted, perforated, or plain. They are placed in holes drilled into aquifers. Normally they are placed in cut slopes or under fills and their

Home - Horizontal Infrastructure - ASCE

Posted in: Horizontal/Subsurface Infrastructure & Transportation Excellent article with clear diagrams, thank you! We drove roundabouts in Australia twenty years ago ...

Influence of vegetation and substrate on the removal and ...

The fate of dissolved organic matter (DOM) during horizontal subsurface-flow constructed wetlands (HSSF CWs) was examined. In several studies it had been demonstrated that factors such as vegetation and substrates type affected the treatment efficiency of DOM, while very few studies discerned their influence on the transformations of DOM.

Evaluating the performance of different media in a ...

Shuib, N, Baskaran, Kanagaratnam, Jegatheesan, V and Muthukumaran, Shobha (2011) Evaluating the performance of different media in a horizontal subsurface flow constructed wetland. In: AGRO 2011 : Proceedings of the 8th International IWA Symposium on Waste Management Problems in Agro-Industries. International Water Association, Izmir, Turkey, pp. …

The Effect of Temperature and Loading Rate on the Ammonia ...

The removal of ammonia nitrogen from the polluted water was investigated in three different types of horizontal subsurface flow constructed wetlands, reed (Phragmites australis)/gravel bed (W1), hybrid vegetation {reed, cattail (Typha latifolia), bulrush (Scirpus validus)}/gravel bed (W2) and reed/hybrid substrates (gravel, zeolite, slag) bed (W3).

Performance evaluation of wastewater treatment using ...

Feb 21, 2015· 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.

Review Horizontal sub-surface flow and hybrid constructed ...

The horizontal sub-surface flow constructed wetlands (HF CWs) were initiated by Seidel in the early 1960s and improved by Reinhold Kickuth under the name Root Zone Method in late 1960s and early 1970s and spread throughout Europe in 1980s and 1990s. However, cohesive soils proposed by Kickuth got clogged very quickly because of low hydraulic

Preparation and application of modified zeolites as ...

Natural zeolite has been recognized as a useful adsorbent for wastewater treatment for removing cations. Natural zeolite is a kind of porous material ... Sarafraz et al. showed that the use of natural zeolite in a horizontal subsurface constructed wetland enhanced adsorption of Zn, and proposed zeolite as an alternative to sand and gravel.