Low temperature MBBR nitrification: Microbiome analysis

Young, Bradley; Delatolla, Robert; Kennedy, Kevin; Laflamme, Édith; Stintzi, Alain

doi:10.1016/j.watres.2016.12.050

Cited by 135 publications

(43 citation statements)

References 42 publications

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“…4a, 6) in relation to baseline levels.The results of NO 3-and NO 2-ions concentrations due to reactor operation mode were characterized by significant variability depending on the kinetics of process and the nitrification stage (Fig. 5) [19,20,21].The comparison of the wastewater treatment efficiency between two types of MBBR reactors (Fig. 1) also showed significantly better results for reactors equipped with disk diffusor.The final results clearly show that disk diffusers are better in the wastewater treatment process than air-lift reactor in Mammoth mode.…”

Section: Discussionmentioning

confidence: 93%

Model Studies on the Effectiveness of MBBR Reactors for the Restoration of Small Water Reservoirs

et al. 2018

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Abstract. The authors present the Moving Bed Biofilm Reactor (MBBR)model with a quasi-continuous flow for small water reservoir restoration, characterized by high concentrations of organic pollutants. To determine the efficiency of wastewater treatment the laboratory analysis of physic-chemical parameters were conducted for the model on a semi-technical scale of 1:3. Wastewater treatment process was carried out in 24 h for 1 m3 for raw sewage. The startup period was 2 weeks for all biofilters (biological beds). Approximately 50% reduction in COD and BOD 5 was obtained on average for the studied bioreactors. Significant improvements were achieved in theclarity of the treated wastewater, with the reduction of suspension by 60%. The oxygen profile has improved significantly in 7 to 9 hours of the process, and a diametric reduction in the oxidative reduction potential was recorded. A preliminary model of biological treatment effectiveness was determined based on the conducted studies. In final stages,the operation mode was set in real conditions of polluted water reservoirs.

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Section: Discussionmentioning

confidence: 93%

Model Studies on the Effectiveness of MBBR Reactors for the Restoration of Small Water Reservoirs

et al. 2018

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“…The MBBR technology promotes biofilm attachment and growth on engineered carriers that are maintained in constant suspension. The attached biofilms are maintained and protected from abrasion with other carriers in the interior spaces of the MBBR carriers . Nitrifying biofilms attached to MBBR carriers have demonstrated highly diverse microbial populations .…”

Section: Membrane Biofilm Reactorsmentioning

confidence: 99%

“…The attached biofilms are maintained and protected from abrasion with other carriers in the interior spaces of the MBBR carriers. 15 Nitrifying biofilms attached to MBBR carriers have demonstrated highly diverse microbial populations. 58 Several parameters may affect the efficiency of the MBBR, such as the percentage of media provided in the reactor and the organic loading (to allow the free carrier suspension, the percentage of reactor volume occupied with carriers in empty tank normally varies from 60% to 70%).…”

Section: Moving Bed Biofilm Reactor (Mbbr)mentioning

confidence: 99%

“…Nitrification (biological oxidation of ammonia to nitrate through nitrite) is an economical and sustainable means of ammonia removal as it eliminates the need for chemical addition . The first nitrification step is N‐NO 2 − formation, and the second step is N‐NO 3 − formation

{normalNH}_{4}^{+} + 1.5 O_{2} \to {normalNO}_{2}^{-} + {2H}^{+} + H_{2} normalO

{normalNO}_{2}^{-} + 0.5 O_{2} \to {normalNO}_{3}^{-}

…”

Section: Introductionmentioning

confidence: 99%

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A review on the advances in nitrifying biofilm reactors and their removal rates in wastewater treatment

Chaali

Naghdi

Brar

et al. 2018

J of Chemical Tech & Biotech

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Growing demand for efficient wastewater treatment systems is spurring on the development of new technologies. Biofilm‐based reactors can be used for the treatment of a variety of wastewaters and these reactors are resistant to toxic environments. Bioreactors, such as sequencing batch biofilm and moving bed biofilm are advanced techniques to treat various types of wastewaters with diverse operating conditions. Ammonium oxidizing bacteria, nitrite oxidizing bacteria and Anammox (anaerobic ammonium oxidation) bacteria are reported to be responsible for nutrient removal. In recent decades, the performance of these systems has been studied widely and compared for a number of wastewater treatment applications. In general, they are particularly suitable for high‐rate nitrification and nitrogen removal. The efficiency of these reactors has been confirmed in the laboratory and large‐scale plants. Their efficiency depends on the surface area of the biocarrier, the filling percentage volume of biofilm carriers, organic loading and diffused aeration supply. Chemical oxygen demand removal of 50–98% was reported for <12 h hydraulic retention time, 0.2 to 6.5 mg L−1 dissolved oxygen concentration and temperature range 15–35 °C. Also, the ratio of nitrate to ammonium conversion was from 0.2 to 90 and N2 conversion was from 0 to 8.5 mg. This review studied each of these bioreactors in the removal of nutrients (nitrogen, phosphorus and oxygen) from different wastewaters and compared them to conventional treatment. The review also includes the relevant studies on laboratory and pilot‐scale bioreactors to enhance their performance and reduce their costs. © 2018 Society of Chemical Industry

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“…are more sensitive to environmental conditions than Nitrosomonas sp. [13], thus a temperature below 8-10 • C mainly inhibits the second phase of nitrification, which results in the accumulation of nitrates in an effluent [14]. Nevertheless, nitrification was also observed at very low temperatures of 1 • C or 0.5 • C [14] and reducing the wastewater temperature resulted in a gradual decrease in the efficiency of oxidation of ammonium nitrogen.…”

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

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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.

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Low temperature MBBR nitrification: Microbiome analysis

Cited by 135 publications

References 42 publications

Model Studies on the Effectiveness of MBBR Reactors for the Restoration of Small Water Reservoirs

Model Studies on the Effectiveness of MBBR Reactors for the Restoration of Small Water Reservoirs

A review on the advances in nitrifying biofilm reactors and their removal rates in wastewater treatment

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

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