Biofilm formation and microbial community analysis of the simulated river bioreactor for contaminated source water remediation

Xu, Xiangyang; Feng, Lijuan; Zhu, Liang; Xu, Jiasheng; Ding, Wei; Qi, Hanying

doi:10.1007/s11356-011-0649-3

Cited by 34 publications

(12 citation statements)

References 28 publications

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“…Figure A presents the NH 4 + ‐N removal performance in the reactors. NH 4 + ‐N removal efficiency is an important indicator of the success of biofilm formation . With an influent NH 4 + ‐N concentration of 4.49 ± 0.73 mg L −1 , the control reactor R 0 required almost 1 month to achieve more than 80% NH 4 + ‐N removal efficiency, which was similar to a previous study.…”

Section: Resultssupporting

confidence: 82%

“…Results suggested that the reactors with pomelo peel (R 1 ) and durian peel (R 3 and R 4 ) both had an obviously shorter lag stage for TN removal than that of the reactor with rice husk (R 2 ), which was similar to the lag stage in NH 4 + ‐N removal. The main reason for the poor nitrogen removal performance in the lag phase was attributed to an unformed biofilm on the carrier . Average TN removal efficiencies in the stable stage were 80.8 ± 11.7% (R 1 ), 58.4 ± 12.3% (R 2 ), 82.6 ± 6.2% (R 3 ) and 91.5 ± 5.7% (R 4 ), with average effluent TN concentrations of 1.18 ± 0.76 mg L −1 (R 1 ), 2.73 ± 0.85 mg L −1 (R 2 ), 1.08 ± 0.42 mg L −1 (R 3 ) and 0.56 ± 0.42 mg L −1 (R 4 ).…”

Section: Resultsmentioning

confidence: 99%

“…Ammonium nitrogen (NH 4 + ‐N) and nitrate nitrogen (NO 3 − ‐N) are common forms of nitrogen in natural water. Nitrification occurs readily under aerobic conditions, but denitrification is relatively difficult owing to the lack of available carbon sources in contaminated water . The emerging process of solid phase denitrification (SPD) has received great attention in recent years and utilizes biodegradable materials for both biofilm carriers and carbon sources .…”

Section: Introductionmentioning

confidence: 99%

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Nitrification and aerobic denitrification in solid phase denitrification systems with various biodegradable carriers for ammonium‐contaminated water purification

Feng

Zhu

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: Solid phase denitrification (SPD) has achieved efficient performance mostly under anoxic conditions for nitrate reduction, while it has few applications in achieving simultaneous nitrification and denitrification (SND) for ammonium nitrogen (NH 4 + -N)-rich water treatment. This study attempted to develop aerobic SPD systems with three alkali-pretreated biodegradable carriers (rice husk, pomelo peel and durian peel). RESULTS:The three carriers all achieved much higher average nitrogen removal rates (0.56-0.68 mg NH 4 + -N L −1 h −1 , 0.06-0.50 mg total nitrogen (TN) L −1 h −1 ) than those of the control reactor without carriers (0.18 mg NH 4 + -N L −1 h −1 , <0.01 mg TN L −1 h −1 ) at a dissolved oxygen (DO) concentration of 2.5 mg L −1 , and no decline in SND efficiency occurred when the DO level increased to 7.5 mg L −1 . However, the aerobic denitrification efficiency was reduced with declining organic availability of the biodegradable carrier. Durian peel carrier exhibited the most efficient TN removal performance and the longest efficiently stable stage owing to its higher carbon content, and a lower DO concentration of 2.5 mg L −1 was helpful for achieving a longer efficiently stable stage. There were significant differences in the dominant bacteria attached to the three biofilm carriers. Meanwhile, higher enrichment of nirS-type than nirK-type denitrifier diversity was found, especially at a higher DO level, and 18 new aerobic denitrifiers were identified. CONCLUSION: The aerobic SPD system could achieve efficient nitrification and denitrification, which was strongly affected by the organic availability of the biodegradable carrier. Therefore, aerobic SPD could be considered as an attractive technology for nitrogen removal in ammonium-rich water and wastewater.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitrification and aerobic denitrification in solid phase denitrification systems with various biodegradable carriers for ammonium‐contaminated water purification

Feng

Zhu

et al. 2019

J of Chemical Tech & Biotech

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“…29 Therefore, it is important to ensure that the elemental composition of the support media is compatible with the microbial community. The intensity of photoelectrons as a function of the binding energy for two support materials (Fig.…”

Section: Resultsmentioning

confidence: 99%

Effect of the chemical composition of filter media on the microbial community in wastewater biofilms at different temperatures

et al. 2016

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“…Wastewater treatment capability of fixed biofilm reactors depends on microbes and carrier media . It have been reported that properties of biofilm supporting media influence early microbial attachment and its growth, thereby affecting the efficiencies of the bioreactors . Motta also reported that microbial growth supporting media is one of the critical factors by providing exterior to microbial attachment, growth and contact with pollutants for removal.…”

Section: Discussionmentioning

confidence: 99%

Bacterial succession and degradative changes by biofilm on plastic medium for wastewater treatment

Khatoon

Ali

et al. 2013

J. Basic Microbiol.

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Biofilms contain a diverse range of microorganisms and their varying extracellular polysaccharides. The present study has revealed biofilm succession associated with degradative effects on plastic (polypropylene) and contaminants in sludge. The wet weight of biofilm significantly (p < 0.05) increased; from 0.23 ± 0.01 to 0.44 ± 0.01 g. Similarly, the dry weight of the biofilm increased from 0.02 to 0.05 g. Significant reduction in pathogens (E. coli and feacal coliforms) by MPN technique (>80%) and in chemical parameters (decrease in COD, BOD5 of 73.32 and 69.94%) representing diminution of organic pollutants. Energy dispersive X-ray spectroscopy (EDS) of plastic revealed carbon and oxygen contents, further surface analysis of plastic by scanning electron microscopy (SEM) revealed emergence of profound bacterial growth on the surface. Fourier transform infrared (FTIR) spectroscopy conforms its biotransformation under aerobic conditions after 8 weeks. New peaks developed at the region 1050 and 969 cm(-1) indicating CO and CC bond formation. Thus plastic with 6 weeks old aerobic biofilm (free of pathogens, max. weight, and OD, efficient COD & BOD removal ability) is suggested to be maintained in fixed biofilm reactors for wastewater treatment.

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Biofilm formation and microbial community analysis of the simulated river bioreactor for contaminated source water remediation

Abstract: Artificial enhancement via the combination of sediment discharging and influent velocity gradient increasing could enhance the biofilm formation and autotrophic AOB enrichment in oligotrophic niche.

Cited by 34 publications

References 28 publications

Nitrification and aerobic denitrification in solid phase denitrification systems with various biodegradable carriers for ammonium‐contaminated water purification

Nitrification and aerobic denitrification in solid phase denitrification systems with various biodegradable carriers for ammonium‐contaminated water purification

Effect of the chemical composition of filter media on the microbial community in wastewater biofilms at different temperatures

Bacterial succession and degradative changes by biofilm on plastic medium for wastewater treatment

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