Treatment of Leachate from a Landfill Receiving Industrial, Commercial, Institutional, and Construction/Demolition Wastes in an Engineered Wetland

2018 ◽  
pp. 165-174
Author(s):  
Majid Sartaj ◽  
Leta Fernandes ◽  
Normand Castonguay
Keyword(s):  
Engineered Wetland

Bacteriophages in Engineered Wetland for Domestic Wastewater Treatment

2007 ◽  
Vol 2 (12) ◽  
pp. 889-899 ◽  
Author(s):  
Hesham Abdulla . ◽  
Ishrak Khafagi . ◽  
Marwa Abd El-Kareem . ◽  
Ahmed Dewedar .
Keyword(s):  
Wastewater Treatment ◽  
Domestic Wastewater ◽  
Domestic Wastewater Treatment ◽  
Engineered Wetland

Controlling various contaminants in wastewater effluent through membranes and engineered wetland

2009 ◽  
Vol 3 (1) ◽  
pp. 98-105 ◽  
Author(s):  
Sarper Sarp ◽  
Sungyun Lee ◽  
Noeon Park ◽  
Nguyen Thi Hanh ◽  
Jaeweon Cho
Keyword(s):  
Wastewater Effluent ◽  
Engineered Wetland

Mineral Processing Residue Use as Substrate in a Modular Engineered Wetland for Wastewater Treatment

2017 ◽  
Vol 4 (3) ◽  
pp. 523-547
Author(s):  
Zheng Yuan ◽  
Shasha Fu ◽  
Xinfa Xu ◽  
Laura A. Wendling
Keyword(s):  
Wastewater Treatment ◽  
Mineral Processing ◽  
Engineered Wetland

Organic matter and nitrogen removal at planted wetlands treating domestic septage with varying operational strategies

2014 ◽  
Vol 70 (2) ◽  
pp. 352-360 ◽  
Author(s):  
Valerie Siaw Wee Jong ◽  
Fu Ee Tang
Keyword(s):  
Organic Matter ◽  
Feeding Strategies ◽  
Operational Strategies ◽  
Loading Rates ◽  
Second Stage ◽  
Dosing Frequency ◽  
Lower Oxygen ◽  
Hydraulic Load ◽  
Filter Clogging ◽  
Engineered Wetland

A two-staged engineered wetland-based system was designed and constructed to treat raw domestic septage. Hydraulic loading rates (HLRs) of 8.75 and 17.5 cm/d were studied with four and eight daily dosings at the second stage of the system to investigate the influence of the regimes on septage treatment. Removal of organic matter (OM) was found to be HLR dependent, where the results indicated that the increase of HLR from 8.75 to 17.5 cm/d impaired the overall level of treatment in the wetland units. Effluent of wetland fed at HLR 17.5 cm/d presented significantly lower oxygen reduction potential and dissolved oxygen values than wetland fed at 8.75 cm/d, indicative of the occurrence of less aerobic and reductive conditions in the bed. The reoxygenation capability of the wetland units was found to be heavily affected by the dosing frequency especially under high hydraulic load (17.5 cm/d). NH3-N degradation was found to decrease with statistical importance when the wetland was flushed two times more frequently with smaller batches of influent. The number of hydraulic load fractionings did not seem to affect the level of treatments of OM and ammonia for both the wetlands fed under the lower HLR of 8.75 cm/d. Prediction of hydraulic limits and management of the feeding strategies are important in the vertical type of engineered wetlands to guarantee the treatment performance and minimize the chances of filter clogging.

scholarly journals Evaluating macrophyte selection and germination protocols to enhance nutrient sequestration in engineered wetland models

2021 ◽  
Author(s):  
Francesca Mary Fernandes
Keyword(s):  
Constructed Wetland ◽  
Selection Criteria ◽  
Aquatic Macrophytes ◽  
Phosphorus Concentration ◽  
Biological Impact ◽  
Native Flora ◽  
Non Invasive ◽  
Lack Of Information ◽  
Engineered Wetland ◽  
Nutrient Sequestration

Research examining contaminant sequestration using engineered wetlands has been conducted for many years but the implementation of sustainable, biodiverse strategies is still in its infancy. A major gap in knowledge still exists regarding the kinds of macrophytes to be selected, especially the inclusion of non-invasive native flora. There is a lack of information about macrophyte selection criteria and germination protocols. Thus, this study attempted to redress this dearth in knowledge. The first part of this thesis critically assessed a list of macrophytes provided by Environment Canada (1996) and created “selection criteria” for choosing specific macrophytes. Germination protocols were then compiled to determine and outline optimized germination protocols for these aquatic macrophytes. In the second part of this study, two different constructed wetlands models were designed for laboratory purposes (a “floating” constructed wetland model and a “stationary” constructed wetland model). Water samples were assed for biological impact and phosphorus concentration.

scholarly journals Laboratory tests of Estonian landfill leachate

2019 ◽  
pp. 289-299
Author(s):  
Pille Kängsepp ◽  
William Hogland ◽  
Mait Kriipsalu ◽  
Toomas Timmusk
Keyword(s):  
Constructed Wetland ◽  
Landfill Leachate ◽  
Laboratory Tests ◽  
Nitrogen Compounds ◽  
Multiple Treatment ◽  
Different Types ◽  
Treatment Stage ◽  
Before And After ◽  
Purification Methods ◽  
Engineered Wetland

During the last decade, many laboratory, pilot and full-scale experiments have beenconducted to investigate the optimal low-tech purification methods for the treatment ofnumerous types of wastewaters. Constructed wetland is a low-tech treatment system, whichusually contains multiple treatment possibilities. Frequently, some kind of soil treatmentsystem is included as one treatment stage. Engineered wetland systems for purification ofwastewater and leachate are not yet widely spread in Estonia. The possibility to use peat asfilter media for treatment of leachate from Aardlapalu landfill (Tartu County, Estonia) hasbeen studied. The leachate was transported into the laboratory, aerated and percolated throughtwo different types of peat filters. The concentration of nitrogen compounds, COD and BODwas measured in the leachate before and after treatment. Hydrological consequences andchemical changes in the peat were investigated.

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