Modeling ammonia removal in aerated facultative lagoons

Houweling, C.D.; Kharoune, Lynda; Escalas, A.; Comeau, Yves

doi:10.2166/wst.2005.0448

Cited by 9 publications

(2 citation statements)

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“…A completely mixed tank was used to describe the hydraulics in the lagoon. To assume, complete mixing is a common simplification when modeling the hydraulics of aerated lagoons (Houweling, Kharoune, Escalas, & Comeau, 2005; Ouldali, Leduc, & Nguyen, 1989). The ASM1 default kinetic and stoichiometric parameters found in WEST 2017 for municipal wastewater treatment were all used for the simulations.…”

Section: Methodsmentioning

confidence: 99%

Nitrification in a biofilm‐enhanced highly loaded aerated lagoon

Patry

Lessard

Vanrolleghem

2019

Water Environment Research

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A full-scale biofilm-enhanced aerated lagoon using fixed submerged media was monitored using automated water quality monitoring stations over the span of one year to quantify its nitrification performance. The system was operating at a high organic loading rate averaging 5.8 g total CBOD 5 /m 2 of media per day (23.9 g total CBOD 5 /m 3 of lagoon per day), a total ammonia nitrogen loading rate averaging 0.9 g NH 4-N/m 2 day (3.7 g NH 4-N/m 3 day), and temperatures ranging from 1.6 to 20.8°C. The system showed an extended seasonal nitrification period compared with a simulated aerated lagoon system of the same dimensions. This extension of complete nitrification with approximately 1 month was observed in the fall despite the decrease of operating temperature down to 4°C. During this maximum nitrification period, substantial denitrification occurred, and the effluent un-ionized ammonia ratio was reduced. A temporary loss of nitrification was also experienced in relation to an episode of elevated suspended solids concentration. Measured biofilm characteristics, namely the detachment dynamics and the biofilm thickness, were used to explain this temporary nitrification loss. During wintertime, a low nitrate production was still observed, suggesting yearlong retention of nitrifying bacteria in the biofilm.

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Section: Methodsmentioning

confidence: 99%

Nitrification in a biofilm‐enhanced highly loaded aerated lagoon

Patry

Lessard

Vanrolleghem

2019

Water Environment Research

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“…Nitrogen removal is temperature dependent. While even performances can be expected all the year long in hot climates, nitrogen reduction in stabilisation ponds and free water surface wetlands depends highly on the season in temperate and northern climates; low removal, if any, occurs during the cold seasons (Archer and O'Brien, 2005;Andersson et al, 2005;Houweling et al, 2005). In soil treatment systems and vertical flow constructed wetlands, ammonium nitrogen is effectively nitrified but without the possibility to remove nitrogen through denitrification.…”

Section: Disadvantagesmentioning

confidence: 99%

Low technology systems for wastewater treatment: perspectives

Brissaud¹

2007

Water Science and Technology

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Low technology systems for the treatment of wastewater are sometimes presented as remnants of the past, nowadays supposedly only meant to serve developing countries and remote rural areas. However, considering their advantages and disadvantages together with enhanced treatment requirements and recent research and technological developments, the future of these systems still appears promising. Successful applications of low technology systems require that more care is taken of their design and operation than often observed. Correlatively, more efforts should be made to decipher the treatment mechanisms and determine the related reaction parameters, so as to provide more deterministic approaches of the natural wastewater treatment systems and better predict their performance.

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