Demonstration of nitrogen removal via nitrite in a sequencing batch reactor treating domestic wastewater

Blackburne, Richard; Yuan, Zhiguo; Keller, Jürg

doi:10.1016/j.watres.2007.11.029

Cited by 194 publications

(91 citation statements)

References 26 publications

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“…1, but activated sludge is a mixed culture containing both AOB and NOB. As such, researchers have carried out BNR via nitrite by adjusting the environmental and operational parameters (pH, dissolved oxygen, temperature, and substrate concentrations) to limit the growth of NOB and enrich AOB, which cause nitrite accumulation (Dosta et al 2007;Blackburne et al 2008;Chen et al 2010). Savings of 25 % in aeration costs using low concentrations of dissolved oxygen only to enrich AOB and a reduction of 40 % of the external carbon source needed during denitrification by limiting NOB in PN have been reported (Ruiz et al 2003).…”

Section: Bnr Via Nitritementioning

confidence: 99%

“…Previous studies have shown the inhibitory effect of high concentrations of FA and HNO 2 on AOB and NOB in PN (Chen et al 2010). Blackburne et al (2008) investigated the role of high-concentration FA in inhibiting Nitrobacter and Nitrospira activities and found that Nitrospira species are much more sensitive to low concentrations of FA than Nitrobacter species. In addition, NOB were found to be inhibited at concentrations higher than 0.1-1 mg NH 3 L -1 and/or 0.2-2.8 mg HNO 2 L -1 , whereas AOB were inhibited by unionized ammonia concentrations higher than 10-150 mg NH 3 L -1 .…”

Section: Bnr Via Nitritementioning

confidence: 99%

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Effect of carbon source on acclimatization of nitrifying bacteria to achieve high-rate partial nitrification of wastewater with high ammonium concentration

2014

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Experiments in two laboratory-scale sequential batch reactors were carried out to investigate the effect of heterotrophic bacteria on nitrifying bacteria using external carbon sources. Partial nitrification of ammonium-rich wastewater during short-term acclimatization enriched the activity of ammonia-oxidizing bacteria in both reactors. Heterotrophic bacteria exhibited a minor effect on nitrifying bacteria, and complete removal of ammonium occurred at a rate of 41 mg L -1 h -1 in both reactors. The main strategy of this research was to carry out partial nitrification using high-activity ammonia-oxidizing bacteria with a high concentration of free ammonia (70 mg L -1 ). The NO 2 -/ (NO 3 -? NO 2 -) ratio was greater than 0.9 in both reactors most of the time.

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Section: Bnr Via Nitritementioning

confidence: 99%

Section: Bnr Via Nitritementioning

confidence: 99%

Effect of carbon source on acclimatization of nitrifying bacteria to achieve high-rate partial nitrification of wastewater with high ammonium concentration

2014

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“…The nitrogen compound in the effluent mainly existed in the form of nitrate (12.6 ± 3.4 mg/L) and the effluent concentration of nitrite was 0.23 ± 0.18 mg/L. The nitrite concentration was not accumulated, indicating that autotrophic denitrification might occur in the inner biofilm of the WDSRBC system [34,35]. The average TN removal efficiency in the ANF-WDSRBC system was 54.5% ± 3.9% (Table 2), which was similar to previous reports for AT-MBR system treating digested domestic wastewater [7].…”

Section: Performance Of the Anf-wdsrbc System At Steady Statementioning

confidence: 99%

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Li¹,

Lü²

2017

Water

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Abstract:Recently, more decentralized wastewater treatments are of great interest for rural regions. In this work, a novel ANF-WDSRBC system combined with an anoxic filter (ANF) and a four-stage water-dropping-self-rotating biological contactor (WDSRBC) was designed as a post-treatment option. With a total hydraulic retention time (HRT) of 8.8 h and reflux ratio of 1:1, the ANF-WDSRBC system was operated 160 days. The results showed the ANF-WDSRBC system had better performance without mechanical aeration devices, the removal efficiencies of chemical oxygen demand (COD), ammonia (NH 4 + -N) and total nitrogen (TN) were 61.4% ± 4.3%, 86.1% ± 3.7%, and 54.5% ± 3.9%, respectively. By means of high-throughput MiSeq sequencing, the results suggested that Proteobacteria, Bacteroidetes, Firmicutes, and Chloroflexi were the predominant phyla in the system. In the WDSRBC units, Nitrosomonas, Nitrosospira, Bacillus, and Nitrospira were the main genera to take part in nitrification. Longilinea, Bellilinea, Thiobacillus, and Thauera in the ANF unit were the main genera to participate in denitrification and organic matters degradation. The novel ANF-WDSRBC system had great potential in the post-treatment of decentralized domestic wastewater.

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“…OUR is the DO consumption per unit time in unit volume of the reactor and can be calculated by a PC or a PLC (programmable logic controller) from sensor-based DO measurements. OUR has been applied in the control of new SBR processes, such as the short-cut nitrification process [67,68] and the enhanced biological phosphorus removal (EBPR) [69]. The breakpoint of the dOUR signal curve (first derivative of OUR), from negative to positive, indicated the endpoint of phosphate uptake.…”

Section: Process Control Strategiesmentioning

confidence: 99%

Sequencing Batch Reactor for Wastewater Treatment: Recent Advances

2015

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Sequencing batch reactors (SBRs), due to its operational flexibility and excellent process control possibilities, are being extensively used for the treatment of wastewater which nowadays is fast becoming contaminated with newer and more complex pollutants. It is also possible to include different expanding array of configurations and various operational modifications to meet the effluent limits which are also continuously getting upgraded. This article provides basic description of SBR process along with its functional and physical variants that lead to improved the removal of nutrients and emerging contaminants. The significance of selectors and various recent advancements in the application of SBR has been discussed along with the possibilities held by SBR process in the treatment of wastewater of different origins and composition to produce effluent of reusable quality.

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Demonstration of nitrogen removal via nitrite in a sequencing batch reactor treating domestic wastewater

Cited by 194 publications

References 26 publications

Effect of carbon source on acclimatization of nitrifying bacteria to achieve high-rate partial nitrification of wastewater with high ammonium concentration

Effect of carbon source on acclimatization of nitrifying bacteria to achieve high-rate partial nitrification of wastewater with high ammonium concentration

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Sequencing Batch Reactor for Wastewater Treatment: Recent Advances

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