scholarly journals Sunlight Inactivation of Viruses in Open-Water Unit Process Treatment Wetlands: Modeling Endogenous and Exogenous Inactivation Rates

2015 ◽  
Vol 49 (5) ◽  
pp. 2757-2766 ◽  
Author(s):  
Andrea I. Silverman ◽  
Mi T. Nguyen ◽  
Iris E. Schilling ◽  
Jannis Wenk ◽  
Kara L. Nelson
Keyword(s):  
Open Water ◽  
Treatment Wetlands ◽  
Unit Process

Biotransformation of Trace Organic Contaminants in Open-Water Unit Process Treatment Wetlands

2014 ◽  
Vol 48 (9) ◽  
pp. 5136-5144 ◽  
Author(s):  
Justin T. Jasper ◽  
Zackary L. Jones ◽  
Jonathan O. Sharp ◽  
David L. Sedlak
Keyword(s):  
Organic Contaminants ◽  
Open Water ◽  
Treatment Wetlands ◽  
Trace Organic Contaminants ◽  
Unit Process ◽  
Trace Organic

Nitrate Removal in Shallow, Open-Water Treatment Wetlands

2014 ◽  
Vol 48 (19) ◽  
pp. 11512-11520 ◽  
Author(s):  
Justin T. Jasper ◽  
Zackary L. Jones ◽  
Jonathan O. Sharp ◽  
David L. Sedlak
Keyword(s):  
Water Treatment ◽  
Nitrate Removal ◽  
Open Water ◽  
Treatment Wetlands

Nitrate removal from reverse osmosis concentrate in pilot-scale open-water unit process wetlands

2021 ◽  
Author(s):  
Rachel C. Scholes ◽  
Michael A. Vega ◽  
Jonathan O. Sharp ◽  
David L. Sedlak
Keyword(s):  
Reverse Osmosis ◽  
Nitrate Removal ◽  
Open Water ◽  
Pilot Scale ◽  
Treatment Technology ◽  
Unit Process ◽  
Novel Treatment ◽  
System P ◽  
Nitrate Concentrations

Open-water wetlands are a novel treatment technology for reverse osmosis concentrate that reduced nitrate concentrations in a pilot-scale system.

scholarly journals Biomat Resilience to Desiccation and Flooding Within a Shallow, Unit Process Open Water Engineered Wetland

Water ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 815
Author(s):  
Adam R. Brady ◽  
Michael A. Vega ◽  
Kimberly N. Riddle ◽  
Henry F. Peel ◽  
Evelyn J. Lundeen ◽  
...  
Keyword(s):  
Water Treatment ◽  
Photosynthetic Activity ◽  
Negative Impact ◽  
Nitrate Removal ◽  
Open Water ◽  
Aquifer Recharge ◽  
Unit Process ◽  
Natural Treatment ◽  
System Resilience ◽  
The Impact

Projections of increased hydrological extremes due to climate change heighten the need to understand and improve the resilience of our water infrastructure. While constructed natural treatment analogs, such as raingardens, wetlands, and aquifer recharge, hold intuitive promise for variable flows, the impacts of disruption on water treatment processes and outcomes are not well understood and limit widespread adoption. To this end, we studied the impact of desiccation and flooding extremes on demonstration-scale shallow, unit process open water (UPOW) wetlands designed for water treatment. System resilience was evaluated as a function of physical characteristics, nitrate removal, photosynthetic activity, and microbial ecology. Rehydrated biomat that had been naturally desiccated re-established nitrate removal consistent with undisrupted biomat in less than a week; however, a pulse of organic carbon and nitrogen accompanied the initial rehydration phase. Conversely, sediment intrusion due to flooding had a negative impact on the biomat’s photosynthetic activity and decreased nitrate attenuation rates by nearly 50%. Based upon past mechanistic inferences, attenuation potential for trace organics is anticipated to follow similar trends as nitrate removal. While the microbial community was significantly altered in both extremes, our results collectively suggest that UPOW wetlands have potential for seasonal or intermittent use due to their promise of rapid re-establishment after rehydration. Flooding extremes and associated sediment intrusion provide a greater barrier to system resilience indicating a need for proactive designs to prevent this outcome; however, residual treatment potential after disruption could provide operators with time to triage and manage the system should a flood occur again.

Establishment and convergence of photosynthetic microbial biomats in shallow unit process open-water wetlands

2018 ◽  
Vol 133 ◽  
pp. 132-141 ◽  
Author(s):  
Zackary L. Jones ◽  
Kristin M. Mikkelson ◽  
Scott Nygren ◽  
David L. Sedlak ◽  
Jonathan O. Sharp
Keyword(s):  
Open Water ◽  
Unit Process

scholarly journals Resilience of photosynthetic biomat within a unit process open water wetland following extreme events

2020 ◽  
Author(s):  
Adam Brady ◽  
Carly Oliver ◽  
Michael Vega ◽  
Jonathan Sharp ◽  
Julia Siegmund ◽  
...  
Keyword(s):  
Extreme Events ◽  
Open Water ◽  
Unit Process
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