Nitrification performance in a membrane bioreactor treating industrial wastewater

Dvořák, Lukáš; Svojitka, Jan; Wanner, J.; Wintgens, Thomas

doi:10.1016/j.watres.2013.03.053

Cited by 51 publications

(24 citation statements)

References 40 publications

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“…It has been reported that Pseudomonas, Dechloromonas, Flavobacterium, Thauera, Rhodobacter, and Zoogloea are often related to denitrification [38][39][40][41][42][43]. As compared to the very low ratio of these species in total bacteria in the seed sludge, the ratio of bacterial community related to denitrification significantly increased from 2.16% to 84.26% in 12 days, which is consistent with the fact that the generation time of heterotrophic microorganisms is short [44]. In addition, the predominant genus, Pseudomonas, increased to 56.13%, and Dechloromonas was present at a ratio of 5.19% after enrichment of the denitrifying bacterial community using nitrite as an electron acceptor.…”

Section: Abundance and Function Of The Speciessupporting

confidence: 80%

Enrichment of Denitrifying Bacterial Community Using Nitrite as an Electron Acceptor for Nitrogen Removal from Wastewater

Yao

Yuan

Wang

2019

Water

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This work aimed to enrich a denitrifying bacterial community for economical denitrification via nitrite to provide the basic objects for enhancing nitrogen removal from wastewater. A sequencing batch reactor (SBR) with continuous nitrite and acetate feeding was operated by reasonably adjusting the supply rate based on the reaction rate, and at a temperature of 20 ± 2 °C, pH of 7.5 ± 0.2, and dissolved oxygen (DO) of 0 mg/L. The results revealed that the expected nitrite concentration can be achieved during the whole anoxic reaction period. The nitrite denitrification rate of nitrogen removal from synthetic wastewater gradually increased from approximately 10 mg/(L h) to 275.35 mg/(L h) over 12 days (the specific rate increased from 3.83 mg/(g h) to 51.80 mg/(g h)). Correspondingly, the chemical oxygen demand/nitrogen (COD/N) ratio of reaction decreased from 7.9 to 2.7. Both nitrite and nitrate can be used as electron acceptors for denitrification. The mechanism of this operational mode was determined via material balance analysis of substrates in a typical cycle. High-throughput sequencing showed that the main bacterial community was related to denitrification, which accounted for 84.26% in the cultivated sludge, and was significantly higher than the 2.16% in the seed sludge.

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Section: Abundance and Function Of The Speciessupporting

confidence: 80%

Enrichment of Denitrifying Bacterial Community Using Nitrite as an Electron Acceptor for Nitrogen Removal from Wastewater

Yao

Yuan

Wang

2019

Water

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“…The explanation of this result is probably due to drying sludge, re-concentration of cations and anions may occur beside the fact that ammonium hydroxide may be converted to nitrate due to high O 2 contents due to drying process. This explanation is supported by the results of [26] who investigated the nitrification performance in a membrane bioreactor treating industrial wastewater and concluded that mixing the municipal waste water with industrial waste water in the level up to 50% resulted in a breakdown of nitrification process. However, this level of nitrate is sufficient for plant nutrition.…”

Section: Nitrate Ammonium and Tkn Concentrationsmentioning

confidence: 69%

Cations and Anions in Sewage Sludge from Gaza Waste Water Treatment Plant

El-Nahhal¹,

Al-Najar²,

El‐Nahhal³

2014

AJAC

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This paper determined cations and anions concentrations, Total Kjeldahl Nitrogen (TKN), and heavy metals content in sewage sludge collected from the drying beds of wastewater treatment plant in Gaza. The aim was to test the possibility of using this sewage sludge as an alternative source of mineral fertilizers. Many instruments were used in this work: flame photometry (K, Na), EDTA titration (Ca, Mg), the turbidity method ( )

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“…The efficiency of different treatment technologies for the removal of microplastics in wastewater has also been reported, although some of them on a pilot scale or with short periods of analysis, that could not reveal actual seasonal variations in their counts [20]. Membrane bioreactor (MBR) has proved to be an established technology for the treatment of both municipal and industrial wastewater, with a high mixed-liqueur suspended solids concentration that may benefit nitrifying and other slow-growing microorganisms [21]. This technology has been tested for microplastic removal, both in real WWTPs [22] or in a pilot-scale bioreactor [20].…”

Section: Introductionmentioning

confidence: 99%

Abatement of Microplastics From Municipal Effluents by Two Different Wastewater Treatment Technologies

Bayo

López-Castellanos

Olmos

2020

WIT Transactions on Ecology and the Environment

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This paper discusses the role of two different wastewater treatment technologies in the removal efficiency of microplastics from the final effluent of an urban wastewater treatment plant; i.e., a membrane bioreactor as an advanced wastewater treatment technology and rapid sand filtration as a tertiary treatment after an activated sludge process. Fourteen different polymer types were identified in all wastewater samples, mainly represented by low-density polyethylene (71.89%), high-density polyethylene (5.44%), acrylate (5.24%), polypropylene (5.22%), polystyrene (4.24%), and nylon (2.56%). The main forms isolated were fibres (61.2%), followed by films (31.5%), fragments (6.7%), and beads (0.6%). The main size interval corresponded to 1 and 2 mm, accounting for 28.2%, 37.3%, and 36.8% for the influent, membrane bioreactor, and rapid sand filtration, respectively. A total of 480 microplastic particles were isolated in all wastewater samples, with an average concentration of 2.16 ± 0.42 items l-1 , and removal rate percentages of 79.01% for the membrane bioreactor and 75.49% for rapid sand filtration. Both technologies proved to be more efficient removing particulate microplastics (98.83% and 95.53%, respectively) than fibres (57.61% and 53.83%, respectively), showing a clear escape into the aquatic environment for fibres. The average microplastic size displayed a statistically significant increase from the influent of the sewage treatment plant (1.05 ± 0.05 mm), to rapid sand filtration effluent (1.15 ± 0.08 mm) and membrane bioreactor (1.39 ± 0.15 mm) (F-test = 4.014, p = 0.019) indicating the fibre selection made by advanced treatment technologies previously discussed.

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Nitrification performance in a membrane bioreactor treating industrial wastewater

Cited by 51 publications

References 40 publications

Enrichment of Denitrifying Bacterial Community Using Nitrite as an Electron Acceptor for Nitrogen Removal from Wastewater

Enrichment of Denitrifying Bacterial Community Using Nitrite as an Electron Acceptor for Nitrogen Removal from Wastewater

Cations and Anions in Sewage Sludge from Gaza Waste Water Treatment Plant

Abatement of Microplastics From Municipal Effluents by Two Different Wastewater Treatment Technologies

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