Showing results for: wetland modeling Articles
-
Modelling removal of microbiological contaminants along a series of constructed wetlands
The rate of removal of microbial pollutants along a series of constructed wetlands for treating wastewater in Covenant University, Ota, Nigeria were monitored from inlet to the discharge point into river Atuara and at 300 m upstream and downstream. The microbiological test results analysed were those of most probable number (MPN) of coliforms ( Escherichia coli ), coliform counts in cfu/100 ...
-
Global supply of freshwater: the role of treatment wetlands
In 2000, humans used approximately 60% of run-off that is geographically and temporally accessible. With projected increases in population, humans may use between 72-99% (depending on whether per capita increases are factored) of accessible run-off by 2025, even accounting for new dam construction. Wetlands have the capability to filter polluted water and could therefore potentially affect access ...
-
Process-based modelling of phosphorus removal in a novel constructed wetland system using dewatered alum-sludge as substrate
A process-based model that can evaluate the transport and the fate of phosphorus (P) in agricultural wastewater was developed for a novel 4-stage dewatered alum sludge cakes (DASC) based constructed wetlands (CWs) system using STELLA software (version 9.1.4). The model considered adsorption, plant and microbial uptakes as the major forms of P involved in the transformation chains. The results ...
-
Temperature, plant species and residence time effects on nitrogen removal in model treatment wetlands
Total nitrogen (TN) removal in treatment wetlands (TWs) is challenging due to nitrogen cycle complexity and the variation of influent nitrogen species. Plant species, season, temperature and hydraulic loading most likely influence root zone oxygenation and appurtenant nitrogen removal, especially for ammonium-rich wastewater. Nitrogen data were collected from two experiments utilizing ...
-
Modeling Wetland Plant Community Response to Assess Water-Level Regulation Scenarios in the Lake Ontario – St. Lawrence River Basin
The International Joint Commission has recently completed a five-year study (2000–2005) to review the operation of structures controlling the flows and levels of the Lake Ontario – St. Lawrence River system. In addition to addressing the multitude of stakeholder interests, the regulation plan review also considers environmental sustainability and integrity of wetlands and various ecosystem ...
-
Water quality monitoring in wetland ecosystems using microbial model communities
This study reviews the concept of model communities for water quality assessment in aquatic ecosystems. The feeding habits of protozoans were used to unite species into functional, trophic groups. Colonising communities were dominated by bacterivorous Flagellate Species (Sf). A new Index of Periphyton Flagellates (IPF) as an indicator of the trophic status of a water-body was developed. ...
-
Using numerical simulation of a one stage vertical flow wetland to optimize the depth of a zeolite layer
This simulation study investigates the treatment performance of a compact French vertical flow wetland using a zeolite layer in order to increase ammonium nitrogen removal. For the modelling exercise, the biokinetic model CW2D of the HYDRUS Wetland Module is used. The calibrated model is able to predict the effect of different depths of the zeolite layer on ammonium nitrogen removal in order ...
-
Empirical regression models for estimating nitrogen removal in a stormwater wetland during dry and wet days
Due to the highly variable hydrologic quantity and quality of stormwater runoff, which requires more complex models for proper prediction of treatment, a relatively few and site-specific models for stormwater wetlands have been developed. In this study, regression models based on extensive operational data and wastewater wetlands were adapted to a stormwater wetland receiving both base flow and ...
-
Water markets can support an improved water future
Fresh water touches every part of daily life – from drinking water and sanitation, to agriculture and energy production. Unfortunately, for nearly half of the world’s population, water scarcity is a growing issue with devastating impacts to our communities, economies and nature. In the past, countries have primarily turned to more supply-side infrastructure, including reservoirs and ...
-
Researchers Study GHGs in Winery Wastewater Treatment with DX4015 Gas Analyzer
A research conducted in Southern European wineries compared the conventional and natural wastewater treatment technologies via life cycle assessment and carbon footprint studies. The research group utilized Gasmet’s portable FTIR gas analyzer DX4015 for monitoring the GHGs. The present study can be seen as an important link in helping the wine sector contribute to the fight against the ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you