Relationship between respirometric activity and community of entrapped nitrifying bacteria: Implications for partial nitrification

Rongsayamanont, Chaiwat; Limpiyakorn, Tawan; Law, Benedict; Khan, Eakalak

doi:10.1016/j.enzmictec.2009.10.014

Cited by 63 publications

(29 citation statements)

References 36 publications

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“…SOUR n of each Mode was 1.92, 1.29 and 0.68 mgO 2 / gMLSS?h, respectively. Rongsayamanont et al (2010) pointed out that when the DO concentration decreased from 5 to 2 mg/L, the SOUR n decreased from about 2.7 to 1.6 mgO 2 / gMLSS?h in the entrapped cells. These observations indicated that the level of oxygen supply had a strong effect on NOB activity.…”

Section: Sourmentioning

confidence: 97%

“…Rongsayamanont et al (2010) found that in the suspended cells, the SOUR a were constant when DO42 mg/L; whereas in the entrapped cells, the SOUR a changed from 4.0 to 2.0 mgO 2 / gMLSS?h when the DO concentration decreased from 5 to 2 mg/L. In the I-BAF system, it was more close to suspended cells because the AOB located on the surface of the porous carriers, where oxygen transfer limitation was not intensive.…”

Section: Sourmentioning

confidence: 97%

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Simultaneous nutrients and carbon removal from low-strength domestic wastewater with an immobilised-microorganism biological aerated filter

Chen

Tong

et al. 2011

Water Science and Technology

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To improve the efficiency of low-strength domestic wastewater treatment, an immobilised-microorganism biological aerated filter (I-BAF) was established for simultaneous carbon, nitrogen and phosphorus removal. The I-BAF performance was systematically evaluated under continuous and intermittent aeration modes. At the optimal condition with an intermittent aeration control schedule of 2 h on/1 h off, the maximum removal rates of COD, NH(4)(+)-N, TN and P were 82.54%, 94.83%, 51.85% and 61.49%, respectively, and the corresponding averaged effluents could meet the first class standards of China. Further analysis of PCR-DGGE profile revealed that members of the gamma and alpha proteobacterium bacterial groups were probably responsible for the nitrogen and phosphorus removal. The I-BAF system showed excellent performance in carbon and nutrients removal, which provided a cost-effective solution for the treatment of low-strength domestic wastewater.

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Section: Sourmentioning

confidence: 97%

Section: Sourmentioning

confidence: 97%

Simultaneous nutrients and carbon removal from low-strength domestic wastewater with an immobilised-microorganism biological aerated filter

Chen

Tong

et al. 2011

Water Science and Technology

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“…Free ammonia (FA) concentrations in the reactor were below the inhibitory threshold reported for NOB (0.1 and 10.0 mg L -1 ) and AOB (>150 mg L -1 ) (Rongsayamanont et al, 2010) (Figure 3). Additionally, the absence of detectable free nitrous acid (FNA) suggested that nitrification was unlikely inhibited by the formation of FNA.…”

Section: Mle -Nitrification Reactor Performancementioning

confidence: 84%

Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process

Bortoli¹,

Kunz²,

Prá

et al. 2019

Rev. ambiente água

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Wastewater from confined animal feeding operations (CAFOs) can interfere significantly with the natural nitrogen and phosphorus balance in the environment if not treated adequately prior to disposal. In this work, a modified Lutzak-Ettinger (MLE) consisting of sequential pre-denitrification/ nitrification was used to determine the effects of nutrient loading rates and hydraulic retention times (HRT) on total nitrogen (TN) and organic carbon (TOC) removal from swine wastewater. MLE reactor was continuously fed swine wastewater for over 205 days using different recycle ratios (Rr) and HRT. Higher TN and TOC removal efficiencies (90.7% and 96.1%, respectively) were obtained when recycling effluent from the nitrification tank (4.5:1) combined with effluent from the final clarifier (1:1). Removal efficiencies of 96% for TOC and 90% for TN were obtained for the maximum loading rates of 0.56 gTN L-1 d-1 and 2.15 g TOC L-1 d-1, respectively. TN and TOC removal rates were achieved with HRT in as little as 3.5 days. Overall, MLE was a robust bioprocess withstanding variations in wastewater physical-chemical composition and/or changes in operational conditions without significant impairment of N and TOC removal efficiencies.

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“…3(B)). In addition, Rongsayamanont et al [36] found that FA at concentrations between 4 and 9 mg L −1 N, as a sole factor, does not lead to the long-term suppression of NOB activity during the treatment of TAN-concentrated wastewater. As a consequence, the influence of FNA seems to be significantly stronger compared to the effects of FA under the conditions applied during this experiment.…”

Section: Phase Iv-indirect Effect Of Do Limitationmentioning

confidence: 97%

Direct and indirect effects of oxygen limitation on nitrification process applied to reject water treatment

Pacek

Švehla

Bartacek

et al. 2015

Desalination and Water Treatment

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2015) Direct and indirect effects of oxygen limitation on nitrification process applied to reject water treatment, Desalination and Water Treatment, 56:3, 598-607, A B S T R A C TThe direct and indirect influence of temporary oxygen limitation on the nitrification of reject water was investigated using a continuous stirred tank bioreactor operated for 330 d at laboratory temperature (23 ± 1˚C). A decrease in dissolved oxygen (DO) concentration from 3 to 0.7 mg L −1 lasted for 38 d and led to effective nitrite accumulation-more than 95% of total oxidized nitrogen was present as nitrite. The drop of DO concentration, at the same time, caused a decrease in the nitrogen oxidation rate from 1.36 to 0.73 kg N m −3 d −1 . After a subsequent DO concentration increase to 3 mg L −1 , the nitrite accumulation remained stable for another 90 d. This development was caused mainly by the indirect effects of DO limitation, consisting especially in the change of nitrogen species represented. A significant increase in free nitrous acid concentration induced by temporary DO limitation seems to be the key factor in this respect. The results of Fluorescence in situ hybridization analysis confirmed a washout of nitrite-oxidizing bacteria (NOB) during the period with high nitrite accumulation. The representation of NOB in total biomass decreased from 6.4% to less than 1% as a consequence of temporary DO limitation.

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Relationship between respirometric activity and community of entrapped nitrifying bacteria: Implications for partial nitrification

Cited by 63 publications

References 36 publications

Simultaneous nutrients and carbon removal from low-strength domestic wastewater with an immobilised-microorganism biological aerated filter

Simultaneous nutrients and carbon removal from low-strength domestic wastewater with an immobilised-microorganism biological aerated filter

Simultaneous removal of nitrogen and organic carbon from swine wastewater using the pre-denitrification/nitrification process

Direct and indirect effects of oxygen limitation on nitrification process applied to reject water treatment

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