Nitrate removal from groundwater using solid-phase denitrification process without inoculating with external microorganisms

Wang, X. M.; Wang, Jianlong

doi:10.1007/s13762-013-0236-x

Cited by 45 publications

(13 citation statements)

References 28 publications

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“…During the current experiment, influent DO concentration averaged 7.0 mg‐O 2 /L, whereas effluent DO values were consistently <0.02 mg‐O 2 /L (Figure 7). The average k Dvol obtained at an HRT of 11 h was 9.7 ± 0.3 mg/L/h NO 3 – ‐N, which was similar to the value observed recently during continuous‐flow denitrification at an HRT of 10 h (Wang et al 2013). The research by Wang and colleagues focused on the simultaneous removal of nitrate and pentachlorophenol from simulated contaminated groundwater using a laboratory‐scale denitrification reactor packed with corncobs as both carbon source and biofilm support.…”

Section: Resultssupporting

confidence: 88%

“…The World Health Organization and the European Economic Community have set standards of 11.3 mg/L nitrate as nitrogen (NO 3 – ‐N), which were adopted as a national standard for drinking water worldwide (Park & Yoo 2009). Consequently, nitrate removal is still a matter of significant concern in Europe, the United States (Tang et al 2011, Zhu et al 2010), and worldwide (Chen et al 2014, Wang & Wang 2013).…”

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confidence: 99%

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Use of Ion Exchange Beads as a Bacterial Carrier for Biodenitrification

Foglar

Šiljeg

Babić³

2016

Journal AWWA

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In this research, an exhausted ion exchange resin was used as a carrier of bacterial cells, and the resulting bio‐ion exchange resin beads were applied in batch and continuous‐flow experiments for monitoring nitrate removal. The continuous‐flow experiments investigated the effects of hydraulic retention times (HRTs) of 7–24 h on the course of denitrification; nitrate removal was achieved at HRTs longer than 9 h, with nitrate and organic removal efficiencies higher than 99 and 80%, respectively. Nitrate removal was then monitored continuously for 31 days. To investigate the influence of phosphate salts on denitrification performance, raw Cetina River water was used. The research also examined the effect of methanol addition on denitrification by decreasing the methanol‐to‐nitrogen mass ratio to 2.5:1. The obtained nitrate and organic removal efficiencies of 100 and 93%, respectively, suggest that the application of the resin beads was effective for continuous nitrate removal from surface water.

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Section: Resultssupporting

confidence: 88%

mentioning

confidence: 99%

Use of Ion Exchange Beads as a Bacterial Carrier for Biodenitrification

Foglar

Šiljeg

Babić³

2016

Journal AWWA

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“…We noted that, with a prolonged operation time, nitrogen removal became more complete and relatively stable, a result similar to those of earlier studies. Using a moving bed biofilm reactor, Zinatizadeh and Ghaytooli [71] showed that the reactor could achieve higher TN removal efficiency when HRT was increased from 4 to 8 h. Wang and Wang [72] and Ovez et al [73] showed that lower HRT caused effluent nitrate-N and nitrite-N to rise, results that are similar to those of our study. Zhu et al [74] showed that increasing HRT led to increased organic loading, hydraulic loading, and liquid shear, which benefit biofilm formation and the growth of aerobic denitrifying bacteria.…”

Section: Process Performancesupporting

confidence: 90%

Effects of Hydraulic Retention Time and Influent Nitrate-N Concentration on Nitrogen Removal and the Microbial Community of an Aerobic Denitrification Reactor Treating Recirculating Marine Aquaculture System Effluent

Song

Yang

Hallerman

et al. 2020

Water

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The effects of hydraulic retention time (HRT) and influent nitrate-N concentration on nitrogen removal and the microbial community composition of an aerobic denitrification reactor treating recirculating marine aquaculture system effluent were evaluated. Results showed that over 98% of nitrogen was removed and ammonia-N and nitrite-N levels were below 1 mg/L when influent nitrate-N was below 150 mg/L and HRT over 5 h. The maximum nitrogen removal efficiency and nitrogen removal rate were observed at HRT of 6 or 7 h when influent nitrate-N was 150 mg/L. High-throughput DNA sequencing analysis revealed that the microbial phyla Proteobacteria and Bacteroidetes were predominant in the reactor, with an average relative total abundance above 70%. The relative abundance of denitrifying bacteria of genera Halomonas and Denitratisoma within the reactor decreased with increasing influent nitrate-N concentrations. Our results show the presence of an aerobically denitrifying microbial consortium with both expected and unexpected members, many of them relatively new to science. Our findings provide insights into the biological workings and inform the design and operation of denitrifying reactors for marine aquaculture systems.

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“…Therefore, the solid-phase denitrification process is simple, and the risk of overdosing or insufficient carbon dosing can be avoided. Over the past few years, solid-phase denitrification has been investigated for biological denitrification in groundwater (Robinson-Lora and Brennan 2009), drinking water (Zhao et al 2009;Wang and Wang 2013), recirculated aquaculture systems (Boley and Muller 2005;Gutierrez-Wing et al 2012), and landfill leachate (Li et al 2014;Trois et al 2010). However, the application of solid-phase denitrification to nitrogen removal from secondary effluent of WWTPs has rarely been reported.…”

Section: Responsible Editor: Gerald Thouandmentioning

confidence: 99%

Optimization of nitrate removal from wastewater with a low C/N ratio using solid-phase denitrification

Zhang

2015

Environ Sci Pollut Res

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In this study, the optimization of nitrate removal from wastewater with a low C/N ratio using solid-phase denitrification was investigated. Biodegradable polymer, an attractive alternative to liquid carbon sources for biological denitrification, was used as a carbon source and biofilm support for nitrate removal. An experiment was conducted based on a central composite design (CCD) with response surface methodology (RSM). A secondary polynomial regression with nitrate removal efficiency as response value was developed. Based on statistical analysis, the nitrate removal model was highly significant with very low probability values (<0.0001). At the optimal conditions for nitrate removal (hydraulic retention time (HRT), 3.5 h; influent NO3 (-)-N concentration, 14.73 mg/L; and influent CODCr concentration, 15.00 mg/L), the nitrate removal efficiency was 99.23 %. The results of an ANOVA and response surface analysis showed that HRT, influent NO3 (-)-N concentration, influent CODCr concentration, and the interaction between the HRT and influent CODCr concentration significantly affected the nitrate removal efficiency (P < 0.05). In solid-phase denitrification process, electron donor for denitrification could be obtained by biological degradation of biodegradable polymer. Therefore, the influent CODCr concentration has no major effect on nitrate removal efficiency compared with that of HRT and influent NO3 (-)-N concentration.

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Nitrate removal from groundwater using solid-phase denitrification process without inoculating with external microorganisms

Cited by 45 publications

References 28 publications

Use of Ion Exchange Beads as a Bacterial Carrier for Biodenitrification

Use of Ion Exchange Beads as a Bacterial Carrier for Biodenitrification

Effects of Hydraulic Retention Time and Influent Nitrate-N Concentration on Nitrogen Removal and the Microbial Community of an Aerobic Denitrification Reactor Treating Recirculating Marine Aquaculture System Effluent

Optimization of nitrate removal from wastewater with a low C/N ratio using solid-phase denitrification

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