Advertisement

Topics

Vertical flow constructed wetlands for decentralized wastewater treatment in Jordan: Optimization of total nitrogen removal.

08:00 EDT 25th March 2019 | BioPortfolio

Summary of "Vertical flow constructed wetlands for decentralized wastewater treatment in Jordan: Optimization of total nitrogen removal."

The baseline performance of two full-scale vertical flow (VF) constructed wetlands operating in the arid climate of Jordan is presented in this study, within the context of the Jordanian Standards for reuse of treated wastewater. One system was a recirculating VF wetland, and the other was a single-pass two-stage VF wetland. Operational modifications were made to each treatment system, with the aim of improving Total Nitrogen (TN) removal. For the recirculating VF system, attached-growth media was added to the recirculation tank to provide increased surface area for growth of denitrifying bacteria. The modification showed a small but significant improvement in TN removal (8 mg/L less than the baseline phase; p = 0.004). Statistical analysis showed that 30% and 4.5% of the increase in compliance with the TN limits (Class A and Class B/C, respectively) could be attributed to the modification. The two-stage VF wetland was modified with a step-feeding line that introduced carbon-rich raw wastewater to the intermediate pump shaft just upstream of the second-stage filter. The modification also resulted in a small but significant improvement in TN removal (13 mg/L less than the baseline phase; p = 0.005). The increase in compliance with the TN standard due to the modification was estimated at 20% and 22% for Class A and B/C, respectively. The simple operational modifications proved to be effective for improving total nitrogen removal in arid climate VF wetland systems.

Affiliation

Journal Details

This article was published in the following journal.

Name: The Science of the total environment
ISSN: 1879-1026
Pages: 495-504

Links

DeepDyve research library

PubMed Articles [22789 Associated PubMed Articles listed on BioPortfolio]

The new German standard on constructed wetland systems for treatment of domestic and municipal wastewater.

The German Association for Water, Wastewater and Waste e.V. (DWA) has published a new standard for the dimensioning, construction, and operation of constructed wetlands for treatment of domestic and m...

Algae turf scrubber and vertical constructed wetlands combined system for decentralized secondary wastewater treatment.

Water shortage is a current problem faced by many regions. The deterioration of water bodies driven by the directly discard of untreated wastewater worsens the water shortage and implies in more costl...

Investigation of flow dynamics of wastewater in a pilot-scale constructed wetland using radiotracer technique.

Constructed wetlands (CWs) are used for the treatment of wastewater by natural processes. Knowledge of the flow dynamics of wastewater through the CWs is required to evaluate their performance, operat...

Vertical flow wetlands and hybrid systems for the treatment of landfill leachate.

Landfill leachates contain a variety of toxic compounds, which makes them one of the most difficult types of wastewater to be treated. An alternative "green" technology for leachate treatment is the u...

Performance of the first stage of the French system of vertical flow constructed wetlands with only two units in parallel: influence of pulse time and instantaneous hydraulic loading rate.

The technology of vertical flow constructed wetlands - French system for treating raw wastewater depends on several hydraulic factors, one of them being the duration of the pulse feeding and the resul...

Clinical Trials [3600 Associated Clinical Trials listed on BioPortfolio]

Coronary Microcirculatory and Bioresorbable Vascular Scaffolds

Angina and heart attacks are caused by narrowings in the coronary arteries (blood vessels) supplying the heart. These narrowings can be opened using a balloon and stent (angioplasty). Trad...

Effects of Prismatic Spectacle Lenses on Symptoms of Dizziness, Headache and Anxiety as Caused by Vertical Heterophoria

The purpose of this study is to demonstrate whether, in patients diagnosed with Vertical Heterophoria, the symptoms of dizziness, headache and / or anxiety are reduced or eliminated when ...

The Jordan Atrial Fibrillation Study: Baseline Risk Scores and One Year Outcome

The Jordanian AF study, the first of its kind in Jordan, will evaluate patients with AF in an in-patient and out-patient settings. The morbidity and mortality associated with AF has not be...

Safety Study of Remsima® (Infliximab) in Rheumatoid Arthritis Patients in Jordan

The purpose of this observational study is to assess the safety and effectiveness of biosimilar Infliximab in patients with rheumatoid arthritis(RA) in Jordan where no visits or interventi...

A Pilot Study Examining for the Presence of Fecal Coliforms and Tropical Diseases in Peru

Tropical diseases are continuously on the rise throughout the world as they are spreading and manifesting in various locations globally. The more prominent vector tends to be the mosquito ...

Medical and Biotech [MESH] Definitions

The length of the face determined by the distance of separation of jaws. Occlusal vertical dimension (OVD or VDO) or contact vertical dimension is the lower face height with the teeth in centric occlusion. Rest vertical dimension (VDR) is the lower face height measured from a chin point to a point just below the nose, with the mandible in rest position. (From Jablonski, Dictionary of Dentistry, 1992, p250)

Garbage, refuse, or sludge, or other discarded materials from a wastewater treatment plant, water supply treatment plant, and air pollution control facility that include solid, semi-solid, or contained material. It does not include materials dissolved in domestic sewage, irrigation return flows, or industrial discharges.

A colorless, odorless, highly water soluble vinyl monomer formed from the hydration of acrylonitrile. It is primarily used in research laboratories for electrophoresis, chromatography, and electron microscopy and in the sewage and wastewater treatment industries.

Colorless, odorless crystals that are used extensively in research laboratories for the preparation of polyacrylamide gels for electrophoresis and in organic synthesis, and polymerization. Some of its polymers are used in sewage and wastewater treatment, permanent press fabrics, and as soil conditioning agents.

A genus of colorless, filamentous, rod-shaped bacteria in the family THIOTRICHACEAE, containing sulfur globules. Thiothrix species are found as components of BIOFILMS in irrigation systems and wastewater treatment plants, and in marine environments as endosymbionts.

Advertisement
Quick Search
Advertisement
Advertisement

 


DeepDyve research library

Searches Linking to this Article