Application potential of aerobic denitrifiers coupled with a biostimulant for nitrogen removal from urban river sediment

Tang, Yinqi; Li, Meng; Xu, Danning; Huang, Jianjun; Sun, Jinsheng

doi:10.1007/s11356-017-0903-4

Cited by 32 publications

(10 citation statements)

References 37 publications

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“…Biostimulants enrich the indigenous micro‐organisms with nutrients, enzymes and minerals. Tang et al () checked the feasibility of bioaugumenting urban river sediments with a biostimulant to increase the nitrogen removal efficiency of indigenous aerobic denitrifiers and reported that the combined technology of bioaugmentation and biostimulation enhanced the removal rate of nitrate (NO 3 ‐N). Efficient ammonium removal has also been observed in aquaculture wastewater when bioaugmented with Bacillus sp .…”

Section: Role Of Aerobic Denitrifiers In Bioremediationmentioning

confidence: 99%

Role of heterotrophic aerobic denitrifying bacteria in nitrate removal from wastewater

et al. 2020

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With the increase in industrial and agricultural activities, a large amount of nitrogenous compounds are released into the environment, leading to nitrate pollution. The perilous effects of nitrate present in the environment pose a major threat to human and animal health. Bioremediation provides a costeffective and environmental friendly method to deal with this problem. The process of aerobic denitrification can reduce nitrate compounds to harmless dinitrogen gas. This review provides a brief view of the exhaustive role played by aerobic denitrifiers for tackling nitrate pollution under different ecological niches and their dependency on various environmental parameters. It also provides an understanding of the enzymes involved in aerobic denitrification. The role of aerobic denitrification to solve the issues faced by the conventional method (aerobic nitrification-anaerobic denitrification) in treating nitrogenpolluted wastewaters is elaborated. verts the iron centre of haemoglobin from Fe 2+ to Fe 3+ Role of heterotrophic aerobic denitrifying bacteriaA. Rajta et al.

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Section: Role Of Aerobic Denitrifiers In Bioremediationmentioning

confidence: 99%

Role of heterotrophic aerobic denitrifying bacteria in nitrate removal from wastewater

et al. 2020

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“…Water 2019, 11, x FOR PEER REVIEW 10 of 13 was 14.7% in sediment [48]. Compared to previous studies, the immobilized microbial beads have a higher nitrogen removal of sediment.…”

Section: Nitrogen Removal Efficiency Of Immobilized Microbial Beadsmentioning

confidence: 79%

“…Xu et al used the coupling sediment microbial fuel cells (SMFCs) with submerged aquatic plants to remove nitrogen in sediment and gain a TN removal rate of up to 25.3% [44]. Aerobic denitrifiers coupled with a denitrifying agent were applied in the sediment of an urban river and the TN removal rate was 14.7% in sediment [48].…”

Section: Nitrogen Removal Efficiency Of Immobilized Microbial Beadsmentioning

confidence: 99%

Screening and Immobilizing the Denitrifying Microbes in Sediment for Bioremediation

Yan

2019

Water

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In this study, immobilized microbial beads were proposed as a solution for excessive nitrogen concentration of the river sediment. The predominant denitrifying microbes were screened from the river sediment. The optimized production of immobilized microbial beads and long-term nitrogen removal efficiency were investigated. 16S rRNA gene sequencing analysis showed that denitrifying bacteria such as Pseudomonas, Alcaligenes, Proteiniclasticum, Achromobacter and Methylobacillus were dominant microflora in the enriched microbial agent, which accounted for 94.43% of the total microbes. Pseudomonas belongs to Gammaproteo bacteria, accounting for 49.22% and functioned as the most predominant denitrifying bacteria. The material concentration of 8% polyvinyl alcohol, 0.5% sodium alginate and 12.5% microbial biomass were found to be the optimal immobilizing conditions. The NH4+-N and total nitrogen (TN) removal rates in sediment with dosing immobilized microbial beads were estimated as 68.1% and 67.8%, respectively, when compared to the dosing liquid microbial agent were 50.5% and 49.3%. Meanwhile, the NH4+-N and TN removal rates in overlying water went up from 53.14% to 59.69% and from 68.03% to 78.13%, respectively, by using immobilized microbial beads.

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“…The biological method (anaerobic denitrification) is widely used because of its features of low‐cost operability and environment‐friendly. But it was difficult to maintain the high nitrogen removal efficiency in the urban river without the strictly anaerobic conditions, owing to new denitrifiers (aerobic denitrifiers) and denitrifying mechanisms that have been discovered, which showed an entirely new approach to remove the excess nitrogen in the urban river (Hou, Cao, Song, & Zhou, 2013; Tang, Li, Xu, Huang, & Sun, 2017). Compared with anaerobic denitrifiers, aerobic denitrifiers have competitive advantages, such as rapid‐propagation, well‐tolerated and high‐efficient denitrification (Duan, Fang, Su, Chen, & Lin, 2015; Torre‐Velasco, Beristain‐Cardoso, Damian‐Matsumura, & Gómez, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effects of exposure to anionic surfactants (SDBS and SDS) on nitrogen removal of aerobic denitrifier

Yin

Zhang

et al. 2020

Water Environment Research

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In order to explain the effect of anionic surfactants on aerobic denitrification in the urban river, sodium dodecyl benzene sulfonate (SDBS) and sodium dodecyl sulfonate (SDS) were added in aerobic denitrifier and the efficiency of nitrogen removal, microbial mechanisms, and enzyme activity was investigated in this study. The results showed that the total nitrogen (TN) and the nitrate nitrogen (NO − 3 − N) removal efficiency decreased as an increase of SDBS concentration. In contrast, 59.70% of the TN and 75.12% of NO − 3 − N were removed as the SDBS was 0 mg/L (Control). When SDBS was 200 mg/L (SDBS-200), the removal efficiency of TN and NO − 3 − N was reduced to 4.92% and 4.00%, respectively. However, the denitrification efficiency was significantly accelerated when the concentration of SDS increased, except for 200 mg/L treatment (SDS-200). As the SDS increased from 0 to 100 mg/L (SDS-100), the removal efficiency of TN and NO − 3 − N raised from 59.70% to 70.8% and from 75.12% to 85.08%, respectively. The community structure of aerobic denitrifiers was significantly affected in the SDBS and SDS. While the Cupriavidus and Achromobacter were dominant genera in the group of Control (39.59%, and 42.45%) and SDS-100 (44.40% and 34.86%), the relative abundance of Cupriavidus increased to 84.06% and 59.45% in the group of SDBS-200 and SDS-200, respectively. Enzyme activity assays proved that the nitrite reductase (NiR) relative activity of aerobic denitrification was suppressed by both SDBS and SDS. The increase in the SDS concentrations (from 0 to 50 mg/L) resulted in sharp growth of the nitrate reductase (NR) relative activities (from 100% to 146.86%). These findings demonstrated that SDBS and SDS affected aerobic denitrification efficiency of the aerobic denitrifiers by changing its microbial community structure and enzyme activity. © 2020 Water Environment Federation • Practitioner points • SDS strengthened aerobic denitrification at low concentration, but the aerobic denitrifiers were inhibited in SDBS. • The variation of community structure played a vital role in the aerobic denitrification system. • The enzyme activity was seriously affected by SDBS and SDS. • Microorganisms and enzyme activity were synergistically involved in the aerobic denitrification.

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Application potential of aerobic denitrifiers coupled with a biostimulant for nitrogen removal from urban river sediment

Cited by 32 publications

References 37 publications

Role of heterotrophic aerobic denitrifying bacteria in nitrate removal from wastewater

Role of heterotrophic aerobic denitrifying bacteria in nitrate removal from wastewater

Screening and Immobilizing the Denitrifying Microbes in Sediment for Bioremediation

Effects of exposure to anionic surfactants (SDBS and SDS) on nitrogen removal of aerobic denitrifier

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