A new step aeration approach towards the improvement of nitrogen removal in a full scale Carrousel oxidation ditch

Jin, Pengkang; Wang, Xiaochang C.; Ngo, Huu Hao; Jin, Xin

doi:10.1016/j.biortech.2015.08.145

Cited by 20 publications

(9 citation statements)

References 24 publications

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“…As a modified activated sludge process, oxidation ditches have distinct advantages in simple construction, flexible operating mode, low sludge production, and special capability of nitrification and denitrification within the same tank. An oxidation ditch is often used to achieve simultaneous nitrification and denitrification because of the alternation of aerobic and anoxic zones within a channel, which can be formed by regulating the oxygen supply with surface aeration equipment or surface aeration combined with microporous aeration (Ammary and Radaideh 2005 ; Liu et al 2010 ; Jin et al 2015 ; Zhou et al 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Microbial community compositions in different functional zones of Carrousel oxidation ditch system for domestic wastewater treatment

Liu²,

Qian

et al. 2017

AMB Expr

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The microbial community diversity in anaerobic-, anoxic- and oxic-biological zones of a conventional Carrousel oxidation ditch system for domestic wastewater treatment was systematically investigated. The monitored results of the activated sludge sampled from six full-scale WWTPs indicated that Proteobacteria, Chloroflexi, Bacteroidetes, Actinobacteria, Verrucomicrobia, Acidobacteria and Nitrospirae were dominant phyla, and Nitrospira was the most abundant and ubiquitous genus across the three biological zones. The anaerobic-, anoxic- and oxic-zones shared approximately similar percentages across the 50 most abundant genera, and three genera (i.e. uncultured bacterium PeM15, Methanosaeta and Bellilinea) presented statistically significantly differential abundance in the anoxic-zone. Illumina high-throughput sequences related to ammonium oxidizer organisms and denitrifiers with top50 abundance in all samples were Nitrospira, uncultured Nitrosomonadaceae, Dechloromonas, Thauera, Denitratisoma, Rhodocyclaceae (norank) and Comamonadaceae (norank). Moreover, environmental variables such as water temperature, water volume, influent ammonium nitrogen, influent chemical oxygen demand (COD) and effluent COD exhibited significant correlation to the microbial community according to the Monte Carlo permutation test analysis (p < 0.05). The abundance of Nitrospira, uncultured Nitrosomonadaceae and Denitratisoma presented strong positive correlations with the influent/effluent concentration of COD and ammonium nitrogen, while Dechloromonas, Thauera, Rhodocyclaceae (norank) and Comamonadaceae (norank) showed positive correlations with water volume and temperature. The established relationship between microbial community and environmental variables in different biologically functional zones of the six representative WWTPs at different geographical locations made the present work of potential use for evaluation of practical wastewater treatment processes.Electronic supplementary materialThe online version of this article (doi:10.1186/s13568-017-0336-y) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 99%

Microbial community compositions in different functional zones of Carrousel oxidation ditch system for domestic wastewater treatment

Liu²,

Qian

et al. 2017

AMB Expr

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“…1A), Betaproteobacteria (31.0% of all clones) was dominant, followed by Chloroflexi (11.1%), Alphaproteobacteria (10.3%), and Bacteroidetes (10.3%). The predominance of these phylogenetic groups is a common trait of SNDPR WWTPs including oxidation ditch systems (13, 15, 20, 39, 48, 49, 56). …”

Section: Resultsmentioning

confidence: 99%

“…Although biological C and N removal in oxidation ditch WWTPs has been extensively investigated (9, 12, 15), limited information is currently available on biological P removal. In the present study, we investigated microorganisms related to P removal in a full-scale oxidation ditch WWTP in Japan with culture-dependent and -independent approaches.…”

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confidence: 99%

Culture-Dependent and -Independent Identification of Polyphosphate-Accumulating <i>Dechloromonas</i> spp. Predominating in a Full-Scale Oxidation Ditch Wastewater Treatment Plant

Terashima

Yama

Sato

et al. 2016

Microbes and environments

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The oxidation ditch process is one of the most economical approaches currently used to simultaneously remove organic carbon, nitrogen, and also phosphorus (P) from wastewater. However, limited information is available on biological P removal in this process. In the present study, microorganisms contributing to P removal in a full-scale oxidation ditch reactor were investigated using culture-dependent and -independent approaches. A microbial community analysis based on 16S rRNA gene sequencing revealed that a phylotype closely related to Dechloromonas spp. in the family Rhodocyclaceae dominated in the oxidation ditch reactor. This dominant Dechloromonas sp. was successfully isolated and subjected to fluorescent staining for polyphosphate, followed by microscopic observations and a spectrofluorometric analysis, which clearly demonstrated that the Dechloromonas isolate exhibited a strong ability to accumulate polyphosphate within its cells. These results indicate the potential key role of Dechloromonas spp. in efficient P removal in the oxidation ditch wastewater treatment process.

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“…This might partially explain the reason for COD removal in ANF units. The genus Caldilinea (1.57%-3.12%) was detected in the WDSRBC unit, which may affect the formation of sludge flocs [46]. Taken together, the microbial communities coexisted in each unit ensured the desired performance of ANF-WDSRBC system.…”

Section: Diversity Of Microbial Community In the Anf-wdsrbc Systemmentioning

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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A new step aeration approach towards the improvement of nitrogen removal in a full scale Carrousel oxidation ditch

Cited by 20 publications

References 24 publications

Microbial community compositions in different functional zones of Carrousel oxidation ditch system for domestic wastewater treatment

Microbial community compositions in different functional zones of Carrousel oxidation ditch system for domestic wastewater treatment

Culture-Dependent and -Independent Identification of Polyphosphate-Accumulating <i>Dechloromonas</i> spp. Predominating in a Full-Scale Oxidation Ditch Wastewater Treatment Plant

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

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