New approaches to enhance pollutant removal in artificially aerated wastewater treatment systems

Freeman, A. I.; Surridge, Ben; Matthews, Mike; Stewart, Mark T.; Haygarth, P. M.

doi:10.1016/j.scitotenv.2018.01.261

Cited by 32 publications

(18 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Unlike "steady-state" treatment systems, where the hydraulic and organic load is relatively consistent, event-driven systems must be designed to handle short-term, but often significant organic loads associated with 'first flush' of stormwater and potentially long periods of drought whereby flows and pollutant concentrations are negligible. Examples of event-driven aerated wetland systems include the treatment of winter stormwater run-off contaminated with de-icing fluids from airports [13,14] and Combined Sewer Overflows (CSO) [21,22]. One of the advantages of aeration in this context is that the aeration system can be used intermittently, or airflow can be 'ramped up', in Subsurface flow aerated wetlands are often used for treating high-strength, highly variable or complex industrial effluents such as landfill leachate [3,4], groundwater contaminated with hydrocarbons [5], food processing wastewater [6,7], mine tailings [8,9], residual dye wastewater [10,11], swine wastewater treatment [12] and de-icer contaminated airport run-off [13][14][15].…”

Section: Global Applicationmentioning

confidence: 99%

“…Examples of event-driven aerated wetland systems include the treatment of winter stormwater run-off contaminated with de-icing fluids from airports [13,14] and Combined Sewer Overflows (CSO) [21,22]. One of the advantages of aeration in this context is that the aeration system can be used intermittently, or airflow can be 'ramped up', in Subsurface flow aerated wetlands are often used for treating high-strength, highly variable or complex industrial effluents such as landfill leachate [3,4], groundwater contaminated with hydrocarbons [5], food processing wastewater [6,7], mine tailings [8,9], residual dye wastewater [10,11], swine wastewater treatment [12] and de-icer contaminated airport run-off [13][14][15]. Subsurface flow aerated wetlands have been successfully demonstrated in cold climates, where the use of an insulation layer prevents the wetland water from freezing [16], despite air temperatures below −25 • C and wetland water temperatures as low as 0.1 • C [17].…”

Section: Global Applicationmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in the Application, Design, and Operations & Maintenance of Aerated Treatment Wetlands

Nivala

Murphy²,

Freeman³

2020

Water

View full text Add to dashboard Cite

This paper outlines recent advances in the design, application, and operations and maintenance (O&M) of aerated treatment wetland systems as well as current research trends. We provide the first-ever comprehensive estimate of the number and geographical distribution of aerated treatment wetlands worldwide and review new developments in aerated wetland design and application. This paper also presents and discusses first-hand experiences and challenges with the O&M of full-scale aerated treatment wetland systems, which is an important aspect that is currently not well reported in the literature. Knowledge gaps and suggestions for future research on aerated treatment wetlands are provided.

show abstract

Section: Global Applicationmentioning

confidence: 99%

Section: Global Applicationmentioning

confidence: 99%

Recent Advances in the Application, Design, and Operations & Maintenance of Aerated Treatment Wetlands

Nivala

Murphy²,

Freeman³

2020

Water

View full text Add to dashboard Cite

show abstract

“…Therefore, the Environmental Protection Agency chose COD and total nitrogen as quality indicators of wastewater containing de-icing agents [5]. The issue of wastewater treatment containing de-icing agents remains unresolved [6], which results in penetration of most of these substances into the ground and water near airports [7]. Most airports are not equipped with a wastewater treatment system.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Nitrification and Denitrification Processes in Biofilters Treating Wastewater from De-Icing Airport Runways

Rodziewicz

Ostrowska

Janczukowicz

et al. 2019

Water

View full text Add to dashboard Cite

The basic factors determining the efficiency of the removal of nitrogen and carbon compounds from airport wastewater containing de-icing agents are low temperature and the C/N ratio (carbon to nitrogen ratio). Biofilm reactors (biofilters) create better conditions for nitrification and denitrification than suspended biomass reactors. The scope of the study included determination of the influence of the C/N ratio in the wastewater on nitrification, denitrification and organic compound removal in biofilm reactors depending on the temperature. The experiment was performed in 24 circular laboratory biofilters with LECA (Light Expanded Clay Aggregates) filling. The study was divided into three series differing in organic carbon loading. In each series, carried out at the same hydraulic retention time, biofilters were operated at 25, 8, 4 or 0 °C. The study showed the effective removal of nitrogen compounds across a very wide temperature range. The applied filling and properly selected operating parameters of the reactors resulted in effective simultaneous nitrification and denitrification. The highest efficiency of nitrogen removal at 0 °C (34.57 ± 4.54%) was obtained at the C/N ratio of 0.5 gC/gN. The efficiency of denitrification (the lowest at the temperature of 0 °C) increased as the temperature and C/N ratio increased in the wastewater.

show abstract

“…To date, numerous methods have been developed to control the release of endogenous nutrients. There are several possible methods of reducing internal P release in sediments, including artificial aeration; chemical applications, such as flocculation precipitation or adding Fe, Al or Ca-based agents; and sediment capping [10,16]. The application of CaO 2 effectively controlled the release of N and P from the sediment, and the concentrations of N and P in the overlying water were obviously reduced because of the increased microbiological action [44].…”

mentioning

confidence: 99%

The effect of natural materials used as sediment remediation on phosphorus and nitrogen control in a mesocosm

Tang

Deng

et al. 2020

Environ Sci Eur

View full text Add to dashboard Cite

Background: Achieving nitrogen (N) and phosphorus (P) control in sediment remediation projects by adding natural materials is receiving increasing attention. In this study, different natural materials, including iron-rich clay minerals, calcite, kaoline, sugarcane bagasse and Phragmites detritus, were applied to test their effects on N and P in a mesocosm experiment. Results: Iron-rich clay minerals and Phragmites detritus had obvious advantages for P control; they resulted in almost undetectable levels of soluble reactive phosphorus (SRP) in the water column throughout the experiment. This finding can be explained by their strong P adsorption ability. The high level of available organic carbon in the sediment and water column after sugarcane bagasse addition provided enough electron donors for denitrification and dissimilatory nitrate reduction to ammonium (DNRA), which caused nitrate (NO 3 −-N) deficiency and ammonium (NH 4 +-N) accumulation in the water column. Additionally, this resulted in anaerobic conditions, further fuelling the release of P from iron-bound P induced by anoxia. Thus, the amount of sugarcane bagasse applied should be considered carefully in order to balance denitrification and DNRA as well as P releases. Calcite and Phragmites detritus are recommended as remediation materials for N removal based on their significant promotion of denitrification and limitation of DNRA, which resulted in low NO 3 −-N and NH 4 +-N levels. These results can be explained by the shifts in the functional microbial community composition and abundance after the addition of natural materials. Conclusions: Iron-rich clay minerals and Phragmites detritus are promising sediment remediation materials for P immobilization due to their strong P adsorption ability. Taken together, the selection of sediment remediation materials should consider the N and P coupling relationship, to prevent NO 3 −-N removal from causing P leaching or NH 4 +-N accumulation.

show abstract

New approaches to enhance pollutant removal in artificially aerated wastewater treatment systems

Cited by 32 publications

References 52 publications

Recent Advances in the Application, Design, and Operations & Maintenance of Aerated Treatment Wetlands

Recent Advances in the Application, Design, and Operations & Maintenance of Aerated Treatment Wetlands

Effectiveness of Nitrification and Denitrification Processes in Biofilters Treating Wastewater from De-Icing Airport Runways

The effect of natural materials used as sediment remediation on phosphorus and nitrogen control in a mesocosm

Contact Info

Product

Resources

About