The effect of the scale of horizontal subsurface flow ...

The effect of the scale of horizontal subsurface flow constructed wetlands on flow and transport parameters. Suliman F(1), French H, Haugen LE, Kløve B, Jenssen P. Author information: (1)Department of Mathematical Sciences and Technology, Agricultural University of Norway, As, Norway. [email protected]

Performance Evaluation of Horizontal Subsurface Flow ...

Mar 03, 2013· 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.

C. S. Akratos and V. A. Tsihrintzis, "Effect of ...

Rural Domestic Wastewater Treatment by Small-scale Horizontal Subsurface Flow Constructed Wetlands at Different Temperatures. Applied Ecology and Environmental Sciences. 2019; 7(1):28-34. doi: 10.12691/aees-7-1-4.

Water | Free Full-Text | Partition and Fate of Phthalate ...

When used as highly produced chemicals and widely used plasticizers, Phthalate acid esters (PAEs) have potential risks to human life and the environment. In this study, to assess the distribution and fate of PAEs, specifically inside a full-scale horizontal subsurface flow constructed wetland, four PAEs including dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP ...

What is Vertical Scaling & Horizontal Scaling? | ESDS

Horizontal-scaling or scale dynamically is quite easy as you can add more machines into the existing pool. Vertical-scaling on the contrary is often limited to the capacity of a single machine. Scaling beyond that capacity results in downtime and comes with an upper limit.

Developing a Pilot Scale Angular Horizontal Subsurface ...

International Research Journal of Environment Sciences_____ ISSN 2319–1414 Vol. 2(2), 6-14, February (2013) Int. Res. J. Environment Sci. International Science Congress Association 6 Developing a Pilot Scale Angular Horizontal Subsurface Flow

Computational Fluid Dynamics Modeling of Residence Time ...

A 2-D geometry of the field-scale horizontal subsurface flow constructed wetland (8.2m length by 2.4m width) was built in the geometry mode of COMSOL. The choice of 2-D model in this research was because it takes a shorter time to run and requires a ...

Effect of vegetation in pilot-scale horizontal subsurface ...

1. Chemosphere. 2012 Oct;89(6):724-31. doi: 10.1016/j.chemosphere.2012.06.042. Epub 2012 Jul 23. Effect of vegetation in pilot-scale horizontal subsurface flow constructed wetlands treating sulphate rich groundwater contaminated with a low and high chlorinated hydrocarbon.

Analysis of the Metabolic Utilization of Carbon Sources ...

the Bacterial Community in Lab-Scale Horizontal Subsurface-Flow Constructed Wetlands Huanhuan Deng, Liyun Ge,* Tan Xu, Minghua Zhang, Xuedong Wang, Yalei Zhang, and Hong Peng* A ctivated sludge and bacterial bed processes have been used to treat the wastewater from large and small cities to protect the water environment.

Efficiency of pilot-scale horizontal subsurface flow ...

Jan 16, 2019· (2019). Efficiency of pilot-scale horizontal subsurface flow constructed wetlands and microbial community composition operating under tropical conditions. International Journal of Phytoremediation: Vol. 21, 14th International Phytotechnologies Conference - Phytotechnologies: New Sustainable Solutions for Environmental Challenges, Guest editors: Michel Labrecque and Patrick …

Rural Domestic Wastewater Treatment by Small-scale ...

Jan 20, 2019· Rural Domestic Wastewater Treatment by Small-scale Horizontal Subsurface Flow Constructed Wetlands at Different Temperatures. Stanislaus Tombe Venusto Lako 1, Xiwu Lu 1,, John Leju Celestino Ladu 1, 2, Ittehad Hussain 1 and Javid Hussain 3. 1 School of Energy and Environment, Department of Environmental Science and Engineering, Southeast University, Nanjing …

Replication of the Arctic Ocean surface layer with ...

The one-box model of the surface layer possesses a salinity-driven state, and also a convected state with the subsurface layer as another solution. The new modeling is proposed with a probability distribution function (PDF) on the temperature–salinity (T–S) plane, which can represent horizontal gradients and small scale features as well.

Effects of tidal operation on pilot-scale horizontal ...

Oct 21, 2016· Three different flow regimes were carried out in a pilot-scale horizontal subsurface flow constructed wetland-treating sulfate rich wastewater contaminated with monochlorobenzene (MCB) and perchloroethene (PCE). The three regimes were continuous flow, 7-day cycle discontinuous flow, and 2.5-day cycle discontinuous flow. The results show that intensifying the tidal regime (2.5-day cycle ...

Wastewater Technology Fact Sheet: Wetlands: Subsurface Flow

A subsurface flow (SF) wetland is specifically designed for the ... 1,000 small scale on-site type systems in the U.S. treating waste waters from individual homes, schools, apartment complexes, commercial ... and draining of a horizontal flow system has …

Highway runoff treatment by lab-scale horizontal sub ...

In this study, lab-scale horizontal sub-surface flow constructed wetlands were experimented to assess their removal efficiency of highway runoff pollutants under different hydraulic conditions. Constructed wetland units with cobble-stone and broken-stone material as filter media were planted with common reed (Phragmites spp.) plants.

Horizontal vs Vertical Scaling | Which is Best for Your ...

Jun 23, 2021· There are pros and cons to both horizontal and vertical scaling, however, horizontal scaling is currently trending due to its reliability and efficiency. Vertical scaling is simpler, while horizontal scaling may prove to optimize your business operations in …

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

Treatment performance of a field-scale horizontal subsurface (SF) constructed wetland (CW) was evaluated for removal efficiency of BOD, TSS, NH4−N, NO3−N, TKN and P from municipal wastewater emanating from a small community of residential areas in Ujjain, Central India. The SF wetland had a rectangular size and covered an effective surface ...

Development and evaluation of a constructed pilot-scale ...

Dec 01, 2018· This paper reports on the development and evaluation of a pilot horizontal subsurface flow constructed wetland (HSSFCW) for removal of biochemical oxygen demand (BOD), chemical oxygen demand (COD), total dissolved solids (TDS), total nitrogen (TN) and total phosphorus (TP) from primary piggery wastewater.

NITROGEN REMOVAL IN A PILOT-SCALE SUBSURFACE …

Annali di Chimica, 90, 2000, by Società Chimica Italiana 513 NITROGEN REMOVAL IN A PILOT-SCALE SUBSURFACE HORIZONTAL FLOW CONSTRUCTED WETLAND Massimo DEL BUBBA*, Luciano LEPRI*CO), Osvaldo ...

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

Material and Methods 2.1 Pilot-scale unit description Two similar pilot-scale horizontal subsurface flow constructed wetlands were constructed and operated for three years, as part of a larger experiment containing five similar units (Akratos and Tsihrintzis, 2007). Each wetland unit consists of a rectangular tank of dimensions 3 m in length, 0 ...

This paper explores the feasibility of the electrical resistivity (ER) method as non-invasive technique to detect dysfunctions of full-scale tertiary wastewater treatment wetlands

SubSurface Wetlands - University of Idaho

There are two types of subsurface flow constructed wetland. The more common type is the horizontal subsurface flow (HSF) wetland. Enlarge the image at right and see a section of this type on the left hand side of the drawing. The second type is the vertical flow subsurface flow (VSF) wetland. It is shown on the right hand side of the section.

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

Performance evaluation of horizontal and vertical flow ...

Jul 24, 2019· Treatment of domestic wastewater in vertical and horizontal subsurface flow constructed wetlands had an average removal of 72.2% for NH 4 + –N (Zurita et al. 2009). Ammonia nitrogen average removal efficiency was found to be 67.19% and 84.47% for 12-h and 24-h HRTs, respectively, in VFCW and 57% and 64% for 12-h and 24-h HRTs in HSSF-CW (Fig ...

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.

The effect of the scale of horizontal subsurface flow ...

May 01, 2005· Horizontal subsurface flow constructed wetlands have proven their efficiency in treating wastewater and removing the pollutants of concern. Treatment efficiency depends on the wastewater residence time, which is a function of the hydraulic loading and the physical conditions of the constructed filter system, which can be described with effective parameters such as: hydraulic …

(PDF) The effect of the scale of horizontal subsurface ...

The effect of the scale of horizontal subsurface flow constructed wetlands on flow and transport parameters February 2005 Water Science & Technology 51(9):259-66

Rural Domestic Wastewater Treatment by Small-scale ...

Small-Scale horizontal subsurface flow constructed wetland located in Wuxi new district area was established. The location of Wuxi city is in the hinterland of Yangtze River Delta (Southern part of Jiangsu province), and it is a transit hub in the Taihu lake basin (in the South).

Creating a Geologic Cross-Section - SERC

Oct 12, 2017· Expanding the vertical scale is known as "vertical exaggeration". It is typical to increase the vertical scale ratio by an order of magnitude compared to that of the horizontal scale. So if the horizontal scale is 1 inch equals 100 feet, a typical vertical scale for the geologic cross section would be 1 inch equals 10 feet.

Effect of operational and design parameters on performance ...

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 …