Control of carbon and ammonium ratio for simultaneous nitrification and denitrification in a sequencing batch bioreactor

Chiu, Yung-Tuen; Lee, Li-Ling; Chang, Cheng-Nan; Chao, Allen C.

doi:10.1016/j.ibiod.2006.08.001

Cited by 197 publications

(86 citation statements)

References 17 publications

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“…That is to say, the conditions for the establishment of the SND are favored in R2. At the same time, the zeolite will allow for in R2, on a microenvironmental scale, the adequate microbial ecological morphology for the concurrent coexistence of nitrifying and denitrifying microorganisms within the same floccules, allowing for the boosting of SND metabolism in comparison with R1 (Chiu et al 2007;Zhang et al 2009;Jia et al 2011;Verma et al 2013). The implications of the symbiont coexistence probably lie in that both microbial groups would establish a more expedited link for the metabolic pathways of the oxidation of ammonium and reduction of nitrate/nitrite, favoring the biological process of SND.…”

Section: Ammonium Removalmentioning

confidence: 99%

“…On the other hand, it is presumed that the nitrite accumulations in the initial phases are mainly due to the effects of insufficient dissolved oxygen (DO) (0.70 and 0.75 mg O 2 /L in R1 and R2) for nitrite-oxidizing bacteria (NOB) (Chiu et al 2007;Verma et al 2013) in the process of adapting to the SBR operational conditions (days 0-70).…”

Section: Nitrate and Nitrite Accumulationmentioning

confidence: 99%

“…This can be explained by the rapid penetration of CODs in the microbial flocs and/or by its storage in the form of slow biodegradability matter such as in the internal structure of polyhydroxybutyrate (PHB) (Chiu et al 2007;Zhang et al 2009;Jia et al 2011;Verma et al 2013). …”

Section: Snd-sbr Kineticsmentioning

confidence: 99%

See 2 more Smart Citations

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Guerrero

Montalvo

Huiliñir

et al. 2016

Int. J. Environ. Sci. Technol.

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One of the technologies used for wastewater nitrogen removal consists in simultaneous nitrificationdenitrification. The low microbial growth rate and the low availability of organic material for the denitrification stage make it necessary to study new operational conditions and the use of microbial supports. The aim of this study was to evaluate the operational behavior of a simultaneous nitrification-denitrification process in a sequential batch reactor utilizing zeolite as a biomass support and step-feed strategy. Two reactors of 2 L were used, one with zeolite and another without zeolite, both operated at constant temperature (31°C), varying nitrogen loading rate (NLR) from 0.041 to 0.113 kg total Kjeldahl nitrogen (TKN/m 3 /day). After 209 days, removals higher than 86 and 96 % in nitrogen compounds and organic matter were obtained, respectively. There was not accumulation of nitrate and nitrite in any case; this means that there was a simultaneous nitrification-denitrification in the reactors. The incorporation of zeolite in the system held higher concentration of biomass in the reactor; this led to reduce start-up to 21 days and to improve 11.31 % removal kinetic. The use of a stepfeed strategy prevents events of inhibition by substrate, even duplicating tolerance to higher NLR for the same operation time.

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Section: Ammonium Removalmentioning

confidence: 99%

Section: Nitrate and Nitrite Accumulationmentioning

confidence: 99%

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Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Guerrero

Montalvo

Huiliñir

et al. 2016

Int. J. Environ. Sci. Technol.

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“…Previous research demonstrated that the carbon source with suitable concentration control could facilitate SND, because the external carbon source could act as electron donor and stimulate the nitrogen removal by denitrification [24,25]. It could be inferred that the different concentration of carbon source in each biological tank may have an active effect on the nitrogen removal.…”

Section: Process Performancementioning

confidence: 99%

Multi-Level Contact Oxidation Process Performance When Treating Automobile Painting Wastewater: Pollutant Removal Efficiency and Microbial Community Structures

Zhu

Groetzbach³

et al. 2017

Water

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Abstract:This study applied a multi-level contact oxidation process system in a pilot-scale experiment to treat automobile painting wastewater. The experimental wastewater had been pre-treated through a series of physicochemical methods, but the water still contained a high concentration of chemical oxygen demand (COD) and had poor biodegradability. After the biological treatment, the COD concentration of effluent could stay below 300 mg/L. The study analyzed the effects of hydraulic residence time (HRT) on COD, ammonia nitrogen (NH 4 + -N), and total nitrogen (TN). The optimal HRT was 8 h; at that time, removal efficiencies of COD, ammonia nitrogen, and total nitrogen were 83.8%, 86.3%, and 65%, respectively. The system also greatly reduced excess sludge production; the removal efficiency was 82.8% with a HRT of 8 h. The study applied high-throughput pyrosequencing technology to evaluate the microbial diversity and community structures in distinct stages of the biological reactor. The relevance between process performance and microbial community structure was analyzed at the phylum and class level. The abundant Firmicutes made a large contribution to improving the biodegradability of painting wastewater through hydrolysis acidification and reducing sludge production through fermentation in the biological reactor.

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“…The research was undertaken to examine the time courses of COD, NH 3 -N and DO during the SND process, with particular reference to the question of whether SND is a physical or microbiological phenomenon [9]. The conducted study showed how the carbon and nitrogen (C/N) ratio controls the SND in a sequencing SBR [10][11][12]. All experimental studies supported by SND phenomenon reports low rate of the biological reactions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Effective Operational Cycle Time and Bioprocess Parameters in a Sequential Batch Reactor for Efficient Organic and Nutrient Removal from Domestic Sewage

Magdum

Varigala

Patil

et al. 2015

IJEE

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A B S T R A C TAnaerobic, anoxic and aerobic environment can be simulated in the single stage sequential batch reactor (SBR) . Various design conditions viz., combinations of different phase time and different cycle time, hydraulic residence time (HRT), substrate loading rate, sludge age (SRT) and aeration time were analyzed for optimum biological treatment. The pilot runs were evaluated with the design conditions of food/microbe ratio (F/M) 0.2 per day and MLSS of 4950 mg/L. For the given design conditions 4, 5 and 6 hours cycle lengths were analyzed for their efficient performance with 30-33% of decant volume for sewage containing C:N:P of 100:8:2. Studies on 4 hours cycle resulted in the maximum overall organic and nutrient removal efficiency at SRT of 26 days and HRT of 12 hours. Efficient sequencing of reactions with respect to the simulated biological conditions in the pilot plant studies resulted in better oxygen recovery and low power consumption. Also, the enforced biological selector phase condition resulted in high microbial reaction rates for organic and nutrient removal. The removal efficiencies with 4 hours cycle time of COD, nitrogen (NH4-N) and phosphate (PO4-P) were 90, 92 and 78%, respectively. This study offers a potential option of low HRT nutrient removal SBR process.

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Control of carbon and ammonium ratio for simultaneous nitrification and denitrification in a sequencing batch bioreactor

Cited by 197 publications

References 17 publications

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Simultaneous nitrification–denitrification of wastewater: effect of zeolite as a support in sequential batch reactor with step-feed strategy

Multi-Level Contact Oxidation Process Performance When Treating Automobile Painting Wastewater: Pollutant Removal Efficiency and Microbial Community Structures

Evaluation of Effective Operational Cycle Time and Bioprocess Parameters in a Sequential Batch Reactor for Efficient Organic and Nutrient Removal from Domestic Sewage

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