Nitrogen Removal from Wastewater by an Aerated Subsurface‐Flow Constructed Wetland in Cold Climates

Redmond, Eric; Just, Craig L.; Parkin, Gene F.

doi:10.2175/106143013x13736496908591

Cited by 31 publications

(17 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 SAGBs can be continuously aerated to maximize treatment of carbonaceous biological oxygen demand (cBOD) and total Kjeldahl nitrogen (TKN) with greater than 95% cBOD and 90% and TKN removal. 7 A planted, intermittently aerated vertical ow SAGB removed 54-78% of NH 4 + and 29-57% of TN as a function of hydraulic loading. 3 A similar system with continuous aeration removed 97%, 99% and 29% chemical oxygen demand (COD), NH 4 + and TN, respectively.…”

Section: Introductionmentioning

confidence: 99%

Partial nitritation ANAMMOX in submerged attached growth bioreactors with smart aeration at 20 °C

Shannon

Hauser

Liu

et al. 2015

Environ. Sci.: Processes Impacts

Self Cite

View full text Add to dashboard Cite

Submerged attached growth bioreactors (SAGBs) were operated at 20 °C for 30 weeks in smart-aerated, partial nitritation ANAMMOX mode and in a timer-controlled, cyclic aeration mode. The smart-aerated SAGBs removed 48-53% of total nitrogen (TN) compared to 45% for SAGBs with timed aeration. Low dissolved oxygen concentrations and cyclic pH patterns in the smart-aerated SAGBs suggested conditions favorable to partial nitritation ANAMMOX and stoichiometrically-derived and numerically modeled estimations attributed 63-68% and 14-44% of TN removal to partial nitritation ANAMMOX in these bioreactors, respectively. Ammonia removals of 36-67% in the smart-aerated SAGBs, with measured oxygen and organic carbon limitations, further suggest partial nitritation ANAMMOX. The smart-aerated SAGBs required substantially less aeration to achieve TN removals similar to SAGBs with timer-controlled aeration. Genomic DNA testing confirmed that the dominant ANAMMOX seed bacteria, received from a treatment plant utilizing the DEMON® sidestream deammonification process, was a Candidatus Brocadia sp. (of the Planctomycetales order). The DNA from these bacteria was also present in the SAGBs at the conclusion of the study providing evidence for attached growth and limited biomass washout.

show abstract

Section: Introductionmentioning

confidence: 99%

Partial nitritation ANAMMOX in submerged attached growth bioreactors with smart aeration at 20 °C

Shannon

Hauser

Liu

et al. 2015

Environ. Sci.: Processes Impacts

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated that sufficient oxygen supply in the soil lter enhances the removal of COD, ammonia and total nitrogen and that other factors like vegetation or temperature variations between 2 C and 20 C had only little effect on removal rates. 27…”

Section: Resultsmentioning

confidence: 99%

Removal of micropollutants, facultative pathogenic and antibiotic resistant bacteria in a full-scale retention soil filter receiving combined sewer overflow

Scheurer

Heß

Lüddeke³

et al. 2015

Environ. Sci.: Processes Impacts

View full text Add to dashboard Cite

Combined sewer systems collect surface runoff as well as wastewater of industrial and domestic origin. During periods of heavy rainfall the capacity of the sewer system is exceeded and the overflow is discharged into receiving waters without any treatment. Consequently, combined sewer overflow (CSO) is considered as a major source of water pollution. This study investigates the effectiveness of a retention soil filter (RSF) for the removal of micropollutants as well as facultative pathogenic and antibiotic resistant bacteria from CSO. The removal of organic group parameters like total organic carbon was excellent and the removal efficiency for micropollutants of the RSF and the wastewater treatment plant (WWTP), which treats wastewater of the same origin during dry and normal weather conditions, was comparable. Compounds of high environmental concern like estrogens or certain pharmaceuticals, e.g. diclofenac, were completely eliminated or removed to a high degree during RSF passage. RSF treatment also reduced the number of E. coli, enterococci and staphylococci by 2.7, 2.2 and 2.4 log-units (median values), respectively. Obviously, some Staphylococcus species can better adapt to the conditions of the RSF than others as a shift of the abundance of the different species was observed when comparing the diversity of staphylococci obtained from the RSF influent and effluent. RSF treatment also decreased the absolute number of antibiotic resistant bacteria. The percentage of antibiotic resistant E. coli and staphylococci isolates also decreased during passage of the RSF, whereas the percentage of resistant enterococci did not change. For E. coli ampicillin and for enterococci and staphylococci erythromycin determined the antibiotic resistance level. The results demonstrate that RSFs can be considered as an adequate treatment option for CSO. The performance for the removal of micropollutants is comparable with a medium sized WWTP with conventional activated sludge treatment. The number of facultative pathogenic and antibiotic resistant bacteria was considerably decreased during RSF passage. However, as RSF effluents still contained antibiotic resistance genes and traces of micropollutants; receiving waters may still be at risk from negative environmental impacts.

show abstract

“…The first bench-scale research on the topic was published by Lockhart [48] and the first peer-reviewed journal article on full-scale aerated wetland application was published by Wallace and Kadlec [5]. The earliest full-scale and outdoor pilot-scale aerated treatment wetland systems received continuous (24 h/d) aeration [3,19,20,26,[49][50][51]. Many bench-scale and pilot-scale research studies have investigated the use of intermittent aeration [51][52][53][54][55][56][57][58][59][60][61][62][63][64][65].…”

Section: Research Trendsmentioning

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

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

Nitrogen Removal from Wastewater by an Aerated Subsurface‐Flow Constructed Wetland in Cold Climates

Cited by 31 publications

References 14 publications

Partial nitritation ANAMMOX in submerged attached growth bioreactors with smart aeration at 20 °C

Partial nitritation ANAMMOX in submerged attached growth bioreactors with smart aeration at 20 °C

Removal of micropollutants, facultative pathogenic and antibiotic resistant bacteria in a full-scale retention soil filter receiving combined sewer overflow

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

Contact Info

Product

Resources

About