Nitrifying moving bed biofilm reactor: Performance at low temperatures and response to cold-shock

Ahmed, Warsama; Tian, Xin; Delatolla, Robert

doi:10.1016/j.chemosphere.2019.04.176

Cited by 24 publications

(14 citation statements)

References 55 publications

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“…D a y s 1 -5 0 D a y s 5 1 -1 1 5 D a y s 1 1 6 -1 (Figure 2 a, b, c). This performance is similar to results observed in a previous, non-acclimatized ultra-low temperature MBBR nitrification study (Ahmed et al, 2019).…”

Section: Ice-forming Period (Days 1-50) 320supporting

confidence: 90%

“…In recent years, studies have outlined the use of rock or aggregate-based attached growth systems (Swanson and Williamson, 1980;Mara and Johnson, 2006;Mattson et al, 2018), stationary in-lagoon fixed film media (Shin and Polprasert, 1988;Srinivas, 2007;Gan and Champagne, 2015) and MBBR systems (Wessman and Johnson, 2006;Delatolla et al, 2010;Hoang, 2013) to upgrade lagoons either by enhancing microbially-mediated nitrification or by increasing the lagoon system's volumetric or loading capacity. Numerous studies have recently demonstrated the effectiveness of attached growth nitrification systems to enhance TAN-removal performance in lagoons to meet stringent ammonia effluent guidelines at ultra-low (0.6 -3.0°C) temperatures (Delatolla et al, 2010;Hoang, 2013;Almomani et al, 2014;Young et al, 2016b;Ahmed et al, 2019;Patry et al, 2019). However, a fundamental lack of knowledge remains regarding the capacity of attached growth systems to perform total nitrogen removal (nitrification and denitrification) in municipal lagoon effluents at ultra-low temperatures (0.6 -3.0°C).…”

Section: Introductionmentioning

confidence: 99%

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Upgrading municipal lagoons in temperate and cold climates: Total nitrogen removal and phosphorus assimilation at ultra-low temperatures

D’Aoust¹,

Simon²,

Leblond³

et al. 2021

Preprint

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In this study, a municipal lagoon with high wintertime effluent total ammonia nitrogen (TAN) concentrations was upgraded with a pilot-scale NIT-NIT-DENIT moving bed biofilm reactor (MBBR) treatment train to characterize its effluent over wintertime operation, investigate the feasibility of upgrading lagoons to achieve substantial biological total nitrogen removal across ultra-low temperatures (0.6 – 3.0°C) and investigate nitrification inhibition pathways in facultative lagoon systems at ultra-low temperatures. Throughout the study, it was observed that the system substantially reduced total nitrogen (TN) and total phosphorus (TP) effluent concentrations by an average of 69.0 ± 24.5% and 74.7 ± 20.1%, respectively, with average TN and TP concentrations exiting the treatment train of 7.60 ± 5.60 mg-N/L and 0.05 ± 0.02 mg-P/L, respectively, indicating the feasibility of upgrading municipal lagoons to meet increasing stringent effluent standards to ensure the perenniality of water resources. Furthermore, it was observed that sulfide toxicity may play an important role in the inhibition of nitrifying organisms in lagoons.

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Section: Ice-forming Period (Days 1-50) 320supporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Upgrading municipal lagoons in temperate and cold climates: Total nitrogen removal and phosphorus assimilation at ultra-low temperatures

D’Aoust¹,

Simon²,

Leblond³

et al. 2021

Preprint

Self Cite

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“…In engineered ecosystems, many processes are mainly based on a single aggregate form, such as sludge‐based process (e.g., MBRs) or biofilm‐based process (e.g., MBBRs; Ahmed et al, 2019; Meng et al, 2009; Ping Chu & Li, 2005; Regmi et al, 2016). In these processes, bacteria must struggle for limited resources due to high niche overlap (Deng et al, 2019; Vanysacker et al, 2014), leading to constant competition (Hibbing et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…For instance, the abundances of Zoogloea , ammonia‐oxidizing bacteria and nitrite‐oxidizing bacteria in the attached forms were higher than those in mobile forms (Guo et al, 2019; Mahendran et al, 2012). The distinct communities of these two types of microbial aggregates could make very distinctive contributions to overall performance (Ahmed et al, 2019; Mahendran et al, 2012; Wingender & Flemming, 1999). By improving the niche differentiation, the engineering ecosystem could be more stable and efficient (Deng et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Microorganisms preferably grow and live in aggregates, either in surface‐attached forms (biofilms) adhering directly to the substratum, or in mobile aggregates (flocs) that form without any substratum (Costerton et al, 1987; Flemming et al, 2016). Based on growth preference, biological wastewater treatment takes full advantage of microbial aggregates in engineered ecosystems (Ahmed, Tian, & Delatolla, 2019; Bagheri & Mirbagheri, 2018; Mahendran, Lishman, & Liss, 2012). When coexisting with other species in the same environment, microorganisms could coevolve with others via interspecies interactions (Madsen et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Ecological insights into the underlying evolutionary patterns of biofilm formation from biological wastewater treatment systems: Red or Black Queen Hypothesis?

Yuan

Meng

2020

Biotech & Bioengineering

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Interspecies interactions and phylogenetic distances were studied to reveal the underlying evolutionary adaptations of biofilms sourced from wastewater treatment processes. Based on 380 pairwise cocultures of 40 strains from two microbial aggregates (surface‐attached and mobile aggregates [flocs]) at two substrate concentrations (LB broth and 0.1× LB broth), interspecies interactions were explored using biofilm classification schemes. There was a strong source‐dependence of biofilm development formed by the monocultures, that is, a higher biofilm formation potential for strains from attached aggregates than for those from sludge flocs at both substrate concentrations. Interestingly, the results showed that total biofilm reduction was dominant in the dual‐species biofilm sourced from flocs in both LB broth (67.37%) and 0.1× LB broth (64.21%), indicating high interspecific competition in mobile aggregates and the independence of substrate concentrations. However, biofilm reduction was higher (33.68%) than induction (19.37%) for the biofilms formed by surface‐attached aggregates in LB broth, while the opposite trend was apparent in 0.1× LB broth, suggesting the occurrence of indeterministic processes for biofilm formation and important roles of substrate concentrations. In addition, the more closely related phylogenetic relationships of cocultures from mobile aggregates were consistent with higher competition compared with those from surface‐attached aggregates. Overall, the underlying evolutionary patterns of biofilms formed from mobile aggregates consistently followed the essence of the “Red Queen Hypothesis,” while biofilms developed from surface‐attached aggregates were not deterministic. This study advanced our understanding of biofilm‐related treatment processes using the principles of microbial ecology.

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Biological fixed‐film systems

Kim

Jae-Hoon

Choi

2020

Water Environment Research

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The technical papers published in 2019 regarding wastewater treatment and microbial films were classified into two categories: biofilm and biofilm reactors. The biofilm category includes biofilm formation, biofilm consortia, bacterial signals, biofouling, extracellular polymeric substances, and biofilm membrane bioreactors. The biofilm reactors category provides recent information on rotating biological contactors, fluidized-bed biofilm reactors, integrated fixed-film activated sludge, moving-bed biofilm reactors, packed-bed biofilm reactors, sequencing biofilm batch reactors, and trickling filters.

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Nitrifying moving bed biofilm reactor: Performance at low temperatures and response to cold-shock

Cited by 24 publications

References 55 publications

Upgrading municipal lagoons in temperate and cold climates: Total nitrogen removal and phosphorus assimilation at ultra-low temperatures

Upgrading municipal lagoons in temperate and cold climates: Total nitrogen removal and phosphorus assimilation at ultra-low temperatures

Ecological insights into the underlying evolutionary patterns of biofilm formation from biological wastewater treatment systems: Red or Black Queen Hypothesis?

Biological fixed‐film systems

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