We conducted a preliminary investigation of wastewater treatment efficiency and economic cost of the oyster-shell-bedded constructed wetlands (CWs) compared to the conventional gravel-bedded CW based on field monitoring data of water quality and numerical modeling. Four study subsurface (SSF) CWs were built to receive wastewater from Taipei, Taiwan. Among these sites, two are vertical wetlands,...

Constructed wetlands are in use to improve the quality of contaminated groundwaters at many sites in the USA. Target contaminants include both organic and inorganic constituents. Volatile and nonvolatile hydrocarbons are found in ground water at closed petroleum refinery sites, and in leachates from landfills. Polycyclic aromatic hydrocarbons are pollutants at many sites. Chlorinated organics o...

BACKGROUND There is growing interest in the natural and constructed wetlands for wastewater treatment. While nutrient removal in wetlands has been extensively investigated, information regarding the degradation of the pharmaceuticals and personal care products (PPCPs) has only recently been emerging. PPCPs are widely distributed in urban wastewaters and can be removed to some extent by the cons...

Abstract Pollutant removal by the mechanism of constructed wetland has led to low cost, highly efficient wastewater treatment technology. Constructed wetlands (CWs) are artificial engineered systems that mimic like natural wetlands. CW’s have been used in previous research treat a broad range waste streams at large-scale for low-cost application management. Generally, most literature targeted p...

Wetlands have been recognized as a natural resource throughout human history. Their importance in their natural state is appreciated by such people as the Marsh Arabs around the confluence of the Tigris and Euphrates rivers in southern Iraq, as well as in managed forms (e.g., rice paddies, particularly in Southeast Asia) (Mitsch and Gosselink, 2000). The water purification capability of wetland...

The United Nations Sustainable Development Goals’ (UN SDGs) action call promotes worldwide social, environmental, and economic prosperity. Each country developed a local plan to achieve the SDGs’ objectives targets. UN presents an annual global SDG progress report, based on international indicator framework regional available data. Wetland ecosystems contribute SDGs; however, more research is r...

Constructed wetlands (CWs) had been widely used to treat the tailwater from sewage treatment plants. However, enduring effectiveness of CWs was still unclear. Therefore, this study aimed investigate chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), and total phosphorus (TP) removal efficiencies (RE) Hongze CW (HZ-CW) after multi-years’ operation. The average COD RE were 7.6% 15.14% in 4t...

This study analyzed the effect of lightweight aggregates made fly ash from sewage-sludge thermal treatment (FASSTT LWA) on effectiveness phosphorus removal wastewater in vertical constructed wetlands (CWs), depending FASSTT LWA content CW filling and hydraulic loading rate. It was performed over 13 weeks using 15 lysimeters prepared as double-layer systems. An upper layer above gravel with diff...

This study contributes to the improvement of low-cost biotechnology for wastewater treatment in constructed wetlands (CWs). Constructed wetlands are energy efficient engineered systems that mimic the treatment processes of natural wetlands, removing polluting organic matter, nutrients, and pathogens from water. The aim of this study was to investigate the advisability of the inoculation of hori...

This study deals with the dairy wastewater treatment using laboratory scale vertical flow (VF) constructed wetlands <i>Canna indica</i> plantation over wetland beds due to phytoremediation capabilities. Three VF CWs (CW-A, CW-B and CW-C) each an area of 0.135 m2 filled gravel (CW-A: 20 mm; CW-B:10 mm gravel) sand (CW-C) receiving 0.04 m3 d-1 were operated for purification. Each unit...