Effect of different salinity adaptation on the performance and microbial community in a sequencing batch reactor

Zhao, Yuanyuan; Park, Hee Deung; Park, Jeong Hoon; Zhang, Fushuang; Chen, Chen; Li, Xiangkun; Zhao, Dan; Zhao, Fei

doi:10.1016/j.biortech.2016.06.032

Cited by 126 publications

(43 citation statements)

References 32 publications

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“…Increasing depletion of fossil fuels and the rising concern for environmental pollution have attracted focus on renewable energy sources . Among the new types of biomass, marine macroalgae are considered attractive renewable resources over terrestrial plants, because of high productivity, non‐requirement of arable land and fertilizers, and greater potential for carbon dioxide fixation .…”

Section: Introductionmentioning

confidence: 99%

Effect of salinity on the microbial community and performance on anaerobic digestion of marine macroalgae

Zhang

Alam

Kong

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND: The main obstacle associated with methane production in anaerobic digestion processes from marine macroalgae is inhibited by the sea salts. This study aims to investigate the anaerobic digestion performance of marine macroalgae by acclimating inoculum to varying salinity, and to analyze the influence of salinity on microbial community by high-throughput gene sequencing. RESULTS:The relationship between specific methane yield and salinity followed the third-order polynomial equation: y = 271.533 + 6.449X − 0.261X 2 + 0.002X 3 . The acclimating inoculum produced methane efficiently at 35 g L −1 with a specific methane yield of 220.88 mL CH 4 g −1 VS. Methanogenesis was considerably impeded at salinity greater than 55 g L −1 . The bacterial phyla Bacteroidetes, Firmicutes, and Proteobacteria and the Methanobacterium, Methanosaeta, and Methanosarcina genera in archaea were predominant at different salinities. Hydrogenotrophic methanogens such as Methanobacterium can tolerate salinity up to 85 g L −1 , whereas acetoclastic methanogens, Methanosaeta and Methanosarcina were severely inhibited at salinity greater than 65 g L −1 . CONCLUSION:The acclimating inoculum can be used as anaerobic microbial resources for efficient methane production from marine macroalgae under seawater conditions of 35 g L −1 . The hydrolytic, acidogenic, acetogenic bacteria and hydrogenotrophic methanogens normally metabolized at different salinities, whereas acetoclastic methanogens were severely inhibited at high saline conditions.

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Section: Introductionmentioning

confidence: 99%

Effect of salinity on the microbial community and performance on anaerobic digestion of marine macroalgae

Zhang

Alam

Kong

et al. 2017

J of Chemical Tech & Biotech

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“…However, their efficient removal could be recovered with subsequent cultivation, which indicated the adaptability of AOB to salinity. Zhao et al [26] reported a similar result: when the salinity increased gradually to 20 g/L of NaCl, NH 4 + -N removal efficiency decreased. However, with domestication time extending, the removal efficiency of NH 4 + -N could be stable and return to the value of the previous period.…”

Section: Effect Of Salinity On Nitrogen Removalmentioning

confidence: 63%

“…The salinity was adapted from 0.0 to 10.0 g/L of NaCl gradually in this study. The influence of salinity caused by other nutrients in the synthesized wastewater was neglected [26].…”

Section: Inoculation and Synthetic Wastewatermentioning

confidence: 99%

“…The performance and bacteria community profiled in a SBBR treating saline wastewater was studied by Zhao et al [26], and the removal efficiency of NH 4 + -N and TP could reach 95.0% at salinity of 2.0 wt %, but the removal of COD, TN, and TP was deteriorated at 2.5 wt % salinity. Overall, the SBBR developed in present study was competitive in the treatment of saline rural wastewater.…”

Section: Comparisons With Other Sbbrsmentioning

confidence: 99%

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Treatment of Rural Wastewater Using a Spiral Fiber Based Salinity-Persistent Sequencing Batch Biofilm Reactor

Zhao

Chao

Zhai

et al. 2017

Water

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Abstract:Differing from municipal wastewater, rural wastewater in salinization areas is characterized with arbitrary discharge and high concentration of salt, COD, nitrogen and phosphorus, which would cause severe deterioration of rivers and lakes. To overcome the limits of traditional biological processes, a spiral fiber based salinity-persistent Sequencing Biofilm Batch Reactor (SBBR) was developed and investigated with synthetic rural wastewater (COD = 500 mg/L, NH stable efficiency reaching 92%, 82% and 80%, respectively. Although TP could be removed at high efficiency of 90% in low salinity conditions (from 0.0 to 5.0 g/L of NaCl), it was seriously inhibited due to nitrite accumulation and reduction of Phosphorus Accumulating Organisms (PAOs) after addition of 10.0 g/L of salt. The behavior proposed in this study will provide theoretical foundation and guidance for application of SBBR in saline rural wastewater treatment.

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“…However, Hanada [45] also reported the prevalence of candidate division TM7 in an acidophilic nitrified SBR (sequencing batch reactor) which was added to simulative wastewater made up of ammonium and other salts without a carbon source. Interestingly, Zhao [46] reported that the most suitable salinity for candidate division TM7 is 2%, which is very close to the salinity in the SGBRs. The relative abundance of candidate phylum Saccharibacteria increased with the increasing N content in soil, which illustrated a preference for candidate Saccharibacteria in ammonia-rich environments [47,48].…”

Section: Evolution Of Bacterial Community Structurementioning

confidence: 79%

Effect of Carbon to Nitrogen Ratio on Water Quality and Community Structure Evolution in Suspended Growth Bioreactors through Biofloc Technology

Gou

Hong

Deng

et al. 2019

Water

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Application of biofloc technology could effectively treat wastewater. However, the effect of influent carbon to nitrogen ratio (C/N ratio) on water quality and microbial community structure evolution in suspended growth bioreactors (SGBRs) through biofloc technology is still unclear. Here, we show that the total ammonia nitrogen (TAN) and nitrite nitrogen in the effluent of the C/N 10 treatment was significantly higher than that in the C/N 15, C/N 20 and C/N 25 treatments (p < 0.05). Higher TAN removal efficiency was obtained in treatments of C/N 15, C/N 20 and C/N 25, and there was no accumulation of nitrite nitrogen and nitrate nitrogen. Increasing the C/N ratio strengthened the elimination ability of total phosphorus and chemical oxygen demand (COD). The concentrations of TAN and COD first dropped to the lowest level and then increased slightly within one cycle in all treatments. The accumulation of biomass in the reactors increased with the increasing C/N ratio, indicating that a higher C/N ratio was conducive to microbial proliferation. The 16S rRNA sequencing revealed that the microbial community diversity in SGBRs was significantly higher than that in the natural wastewater (P0). The predominant phylum were Proteobacteria, Bacteroidetes and Verrucomicrobia, but Saccharibacteria occupied a dominant position in the late period of the experiment. Pathogens, such as Aeromonas, Acidovorax, Flavobacterium, and Malikia were significantly decreased after high C/N ratio simulative wastewater treating natural wastewater in the reactors. In summary, the water quality and biomass concentrations in SGBRs can be improved under the conditions of influent C/N ratio, equal to or greater than 15.

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Effect of different salinity adaptation on the performance and microbial community in a sequencing batch reactor

Cited by 126 publications

References 32 publications

Effect of salinity on the microbial community and performance on anaerobic digestion of marine macroalgae

Effect of salinity on the microbial community and performance on anaerobic digestion of marine macroalgae

Treatment of Rural Wastewater Using a Spiral Fiber Based Salinity-Persistent Sequencing Batch Biofilm Reactor

Effect of Carbon to Nitrogen Ratio on Water Quality and Community Structure Evolution in Suspended Growth Bioreactors through Biofloc Technology

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