Simultaneous nitrification and denitrification in continuous flow MBBR with novel surface-modified carriers

Liu, Tao; Jia, Guangyue; Xu, Jiawei; He, Xiaolu; Quan, Xie

doi:10.1080/09593330.2020.1735526

Cited by 30 publications

(4 citation statements)

References 39 publications

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“…Previous reports suggest that these two bacterial phyla are involved in denitrification. 20,39,40 This means that Fe 3+ could promote the growth of denitrifying bacteria and is consistent with results from Ma et al (2021). 1 A recent report from Li et al (2022) showed that Al 3+ could inhibit the nitrification and denitrification processes of the biofilter.…”

Section: Environmental Science: Water Research and Technology Papersupporting

confidence: 92%

Effects of an electrocoagulation–air flotation–microfiltration pretreatment process on the start-up of a moving bed biofilm reactor: performance and microbial community structure

Xu,

Du,

Zhang

et al. 2024

Environ. Sci.: Water Res. Technol.

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Section: Environmental Science: Water Research and Technology Papersupporting

confidence: 92%

Effects of an electrocoagulation–air flotation–microfiltration pretreatment process on the start-up of a moving bed biofilm reactor: performance and microbial community structure

Xu,

Du,

Zhang

et al. 2024

Environ. Sci.: Water Res. Technol.

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“…Published literature indicates that microorganisms such as prokaryotes and fungi can carry out heterotrophic nitrification and denitrification [23]. Nitrification during Experiments 3 and 4 was not inhibited by high C/N ratio, indicating that nitrifiers had heterotrophic metabolism at high organic carbon concentrations [29].…”

Section: International Journal Of Water and Wastewater Treatmentmentioning

confidence: 88%

Novel Start-up for Moving Bed Biological Reactors for Nitrogen Removal with High C/N Influent by Heterotrophic Nitrification and Aerobic Denitrification

2024

Int J Water Wastewater Treat

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A novel start-up strategy for MBBR systems was implemented that achieved removal rates of ammonia and total nitrogen of more than 90% and 70%, respectively, with influent C/N ratio of nine. The strategy consists of operating the MBBR with non-nitrified secondary effluent (C/N=2) until ammonia removal is sustained and gradually increase the C/N ratio of the feed to the target value of nine, when the MBBR system is fed primary effluent. Before using the start-up sequence, the MBBR system treating primary effluent (C/N=9) showed negligible ammonia removal after 120 days of operation, indicating the absence of nitrifying bacteria. It was assumed that heterotrophs were outcompeting autotrophs, and the C/N ratio was decreased to allow autotrophs to proliferate. Genomic analysis indicated the presence of bacterial and fungal populations, which can perform nitrification and denitrification. The most abundant heterotrophs observed were Proteobacteria at 31%, Bacteroidetes at 22%, and Actinobacteria at 8%. The most abundant fungal population belonged to Ascomycota (10%), Basidiomycota (10%), and Mucoromycota (1%). Heterotrophic nitrification and aerobic denitrification were found to play an important role in nitrogen removal at C/N=9. Autotrophs may have proliferated at lower C/N ratio as total nitrogen removal was low, but at higher C/N a shift in microbial population should have taken place as indicated by the dominance of heterotrophs.

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“…The carbon storage can explain the occurrence of SND without the addition of an external carbon source in the deeper biofilm layer (Lim, Lim, & Seng, 2011). The presence of several functional bacteria, of which autotrophic nitrification, anoxic denitrification, heterotrophic nitrification and aerobic denitrification co-existed on the preferable carrier surface, helped to promote SND in the moving bed biofilm reactor (Liu et al, 2019).…”

Section: Biomass and Microbial Communitiesmentioning

confidence: 99%

Purification of polluted surface water by sponge moving bed membrane bioreactor with short hydraulic retention time operation

Sang

Chiemchaisri

2022

Water & Environment J

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A sponge moving bed membrane bioreactor (SMB‐MBR) was developed for high‐rate biological purification of polluted surface water for nonpotable utilization purposes. The SMB‐MBR contains polyurethane sponge cubes (10% v/v) and submerged hollow fibre membranes in a solid separation compartment and operated under a short hydraulic retention time of 1 h. High organic (96% biochemical oxygen demand [BOD], 85% soluble chemical oxygen demand [COD] and 84% COD) and nitrogen (99% ammonium nitrogen [NH4+], 98% total Kjeldahl nitrogen [TKN] and 87% total nitrogen [TN]) removals were achieved. In the SMB‐MBR, the suspended and attached biomass were allowed to develop under no sludge wastage operation. The co‐existence of heterotrophs, nitrifiers and denitrifiers in the biomass was confirmed under a high oxygen environment. Sustainable operation of SMB‐MBR could be achieved by maintaining stable membrane flux without chemical cleaning for 60 days. This research demonstrates the technical feasibility of applying the SMB‐MBR for clean water production when the polluted surface is the only raw water source.

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Simultaneous nitrification and denitrification in continuous flow MBBR with novel surface-modified carriers

Cited by 30 publications

References 39 publications

Effects of an electrocoagulation–air flotation–microfiltration pretreatment process on the start-up of a moving bed biofilm reactor: performance and microbial community structure

Effects of an electrocoagulation–air flotation–microfiltration pretreatment process on the start-up of a moving bed biofilm reactor: performance and microbial community structure

Novel Start-up for Moving Bed Biological Reactors for Nitrogen Removal with High C/N Influent by Heterotrophic Nitrification and Aerobic Denitrification

Purification of polluted surface water by sponge moving bed membrane bioreactor with short hydraulic retention time operation

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