Autotrophic biological nitrogen removal from saline wastewater under low DO

Zhang, Tong; Yan, Q.; Ye, Lin

doi:10.1002/jctb.2438

Cited by 15 publications

(7 citation statements)

References 24 publications

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“…The above results demonstrated that a proper COD concentration did not affect ANAMMOX performance but promoted TN removal. The stimulation was attributed to heterotrophic denitrification removing nitrate produced in the ANAMMOX reaction, as reported in previous studies . A comparison with previous studies is displayed in Table.…”

Section: Resultssupporting

confidence: 74%

“…Compared with ANAMMOX, denitrification was thermodynamically more feasible because of lower Gibbs free energies . Further, the growth and bio‐activity of ANAMMOX bacteria were probably inhibited by organic matter . Therefore, under high COD concentration, denitrification increased instead of autotrophic ANAMMOX reaction.…”

Section: Resultsmentioning

confidence: 99%

“…ANAMMOX (ANaerobic AMMonium OXidation) involves the oxidation of ammonia with nitrite as the electron acceptor and uses CO 2 as the only carbon source without the need for aeration or additional external carbon sources . The process is usually applied to wastewater treatment with low C/N ratio, such as anaerobic digester supernatant, pig manure effluents, and landfill leachate . However, organic matter was found to affect ANAMMOX performance, since autotrophic ANAMMOX bacteria that were sensitive to organic disturbance failed to compete with heterotrophic denitrificants under high chemical oxygen demand (COD) concentration.…”

Section: Introductionmentioning

confidence: 99%

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ANAMMOX performance, granulation, and microbial response under COD disturbance

Huang

Ruan

et al. 2014

J. Chem. Technol. Biotechnol.

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BACKGROUND: ANAMMOX (ANaerobic AMMonium OXidation), a promising process for biological nitrogen removal, is usually affected by organic matter. In order to fully understand the effect of chemical oxygen demand (COD) on the ANAMMOX process, reactor performance, granular characteristics and microbial response were evaluated systematically under glucose stimulation. RESULTS: High removal efficiencies of ammonium and total nitrogen (> 90%) were achieved with 100 mg L -1 COD concentration. ANAMMOX contribution was reduced to only 69% as COD concentration was increased to 300 mg L -1 . The granulation, EPS contents, TB-EPS/LB-EPS and protein/carbohydrate were increased at a specific COD, with higher COD disrupting the biofacies structure. The results also showed that EPS distribution and microbial structure were affected by the organic disturbance. CONCLUSION: An appropriate COD concentration enhanced the total nitrogen removal during ANAMMOX process, by enabling a stable synergism between ANAMMOX bacteria and heterotrophic denitrificans. Furthermore, a proper COD stimulation promoted sludge granulation by influencing EPS composition and distribution. However, excessive COD disturbance disrupted the highly efficient biofacies structure and microbial balance, which then decreased the ANAMMOX competitiveness.

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Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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ANAMMOX performance, granulation, and microbial response under COD disturbance

Huang

Ruan

et al. 2014

J. Chem. Technol. Biotechnol.

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“…By far no pure strains of AnAOB have ever been obtained (Dapena-Mora et al 2004). Probably because of their slow growth rate, anammox bacteria are reported to be vulnerable to some external conditions such as low temperature, high dissolved oxygen (DO), and some inhibitors (Dosta et al 2008;Hendrickx et al 2012;Isaka et al 2008;Zhang et al 2010a). Even though facing quite a few difficulties in full-scale applications such as long-time start-up (van der Star et al 2007) and instability, anammox is still an innovative technological advancement in depleting ammonia from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Anammox start-up in sequencing batch biofilm reactors using different inoculating sludge

Yang

Gao

2012

Appl Microbiol Biotechnol

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In this study, anammox bacteria were rapidly enriched in sequencing batch biofilm reactors (SBBRs) with different inoculations. The activated sludge taken from a sequencing batch reactor was used and inoculated to SBBR1, while SBBR2 was seeded with stored anaerobic sludge from an upflow anaerobic fixed bed (2-year stored at 5-15 °C). Nitrogen removal performance, anammox activity, biofilm characteristics and variation of the microbial community were evaluated. The maximum total nitrogen loading rate (NLR) of SBBR1 gradually reached to 1.62 kgN/(m³/day) with a removal efficiency higher than 88% and the NLR of SBBR2 reached to 1.43 kgN/(m³/day) with a removal efficiency of 86%. SBBR2 was more stable compared to SBBR1. These results, combined with molecular techniques such as scanning electron microscope, fluorescence in situ hybridization, and terminal restriction fragment length polymorphism, indicated that different genera of anammox bacteria became dominant. This research also demonstrates that SBBR is a promising bioreactor for starting up and enriching anammox bacteria.

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“…Few researchers [36,37] reported that anammox bacteria have slow growth rate kinetics, and hence, they are vulnerable to external conditions, such as low temperature, high dissolved oxygen and some inhibitors. Although this technique faces some complications in full-scale applications, such as long start-up and instability, anammox is still an innovative technological development in reducing ammonia from wastewater [35,38].…”

Section: Other Treatment Strategies To Enhance the Reactor Performancementioning

confidence: 99%

Sustainable Agro-Food Industrial Wastewater Treatment Using High Rate Anaerobic Process

Rajagopal

Saady

Torrijos

et al. 2013

Water

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This review article compiles the various advances made since 2008 in sustainable high-rate anaerobic technologies with emphasis on their performance enhancement when treating agro-food industrial wastewater. The review explores the generation and characteristics of different agro-food industrial wastewaters; the need for and the performance of high rate anaerobic reactors, such as an upflow anaerobic fixed bed reactor, an upflow anaerobic sludge blanket (UASB) reactor, hybrid systems etc.; operational challenges, mass transfer considerations, energy production estimation, toxicity, modeling, technology assessment and recommendations for successful operation.

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Autotrophic biological nitrogen removal from saline wastewater under low DO

Cited by 15 publications

References 24 publications

ANAMMOX performance, granulation, and microbial response under COD disturbance

ANAMMOX performance, granulation, and microbial response under COD disturbance

Anammox start-up in sequencing batch biofilm reactors using different inoculating sludge

Sustainable Agro-Food Industrial Wastewater Treatment Using High Rate Anaerobic Process

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