Base de dados : MEDLINE
Pesquisa : G02.111.587.500 [Categoria DeCS]
Referências encontradas : 1477 [refinar]
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[PMID]:28278777
[Au] Autor:Lu YF; Ma LJ; Ma L; Shan B; Chang JJ
[Ad] Endereço:a School of Ecology and Environmental Science, Yunnan University , Kunming , People's Republic of China.
[Ti] Título:Improvement of start-up and nitrogen removal of the anammox process in reactors inoculated with conventional activated sludge using biofilm carrier materials.
[So] Source:Environ Technol;39(1):59-67, 2018 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The start-up of the anaerobic ammonium oxidation (anammox) process in three up-flow column reactors seeded with common mixed activated sludge and added with three materials, sponge (R1), sponge + volcanic rock (R2) and sponge + charcoal (R3), as carriers for biofilm formation were comparatively investigated in this study. The supplement of volcanic rock and charcoal could significantly shorten the start-up time of the anammox process, which primarily occurred in the activity-enhanced phase, with ammonium and nitrite removal efficiencies stabilized above 92.5% and 93.4% after an operation period of 145, 105 and 121 d for R1, R2 and R3, respectively. After the successful anammox start-up, R2 performed significantly better in TN removal (p < .05), achieving an average rate of 91.0% and 191.5 g N m d compared to R1 of 88.4% and 172.1 g N m d , and R3 of 89.9% and 180.1 g N m d in the steady running phase. The ratios of consumed [Formula: see text] and generated [Formula: see text]/consumed [Formula: see text] after anammox start-up were lower than the theoretical values, probably suggesting the simultaneous existences of anammox, denitrification as well as nitrification processes in the reactors. A reddish brown biofilm was wrapped on the carriers and morphological detection of biofilm displayed the presentations of thick and compact floc aggregates and some filamentous bacteria on the sponge, and spherical-, ovoid- and shortrod-shaped microorganisms on the volcanic rock and charcoal. Using porous material as carrier for biofilm development is an effective strategy for practical application of the anammox reactor.
[Mh] Termos MeSH primário: Biofilmes/crescimento & desenvolvimento
Nitrogênio/metabolismo
Eliminação de Resíduos Líquidos/métodos
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Compostos de Amônio
Reatores Biológicos/microbiologia
Carvão Vegetal
Crescimento Quimioautotrófico
Desnitrificação
Nitrificação
Nitritos
Nitrogênio/análise
Oxirredução
Esgotos/microbiologia
Poluentes Químicos da Água/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ammonium Compounds); 0 (Nitrites); 0 (Sewage); 0 (Water Pollutants, Chemical); 16291-96-6 (Charcoal); N762921K75 (Nitrogen)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170311
[St] Status:MEDLINE
[do] DOI:10.1080/09593330.2017.1294624


  2 / 1477 MEDLINE  
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[PMID]:28460292
[Au] Autor:Wen X; Gong B; Zhou J; He Q; Qing X
[Ad] Endereço:Faculty of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, PR China.
[Ti] Título:Efficient simultaneous partial nitrification, anammox and denitrification (SNAD) system equipped with a real-time dissolved oxygen (DO) intelligent control system and microbial community shifts of different substrate concentrations.
[So] Source:Water Res;119:201-211, 2017 08 01.
[Is] ISSN:1879-2448
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Simultaneous partial nitrification, anammox and denitrification (SNAD) process was studied in a sequencing batch biofilm reactor (SBBR) fed with synthetic wastewater in a range of 2200 mgN/L âˆ¼ 50 mgN/L. Important was an external real-time precision dissolved oxygen (DO) intelligent control system that consisted of feed forward control system and feedback control system. This DO control system permitted close control of oxygen supply according to influent concentration, effluent quality and other environmental factors in the reactor. In this study the operation was divided into six phases according to influent nitrogen applied. SNAD system was successfully set up after adding COD into a CANON system. And the presence of COD enabled the survival of denitrifiers, and made Thauera and Pseudomonas predominant as functional denitrifiers in this system. Denaturing gradient gel electrophoresis (DGGE), fluorescence in situ hybridization (FISH) and 16S rRNA amplicon pyrosequencing were used to analyze the microbial variations of different substrate concentrations. Results indicated that the relative population of ammonia oxidizing bacteria (AOB) members decreased when influent ammonia concentration decreased from 2200 mg/L to 50 mg/L, while no dramatic drop of the percent of anammox bacteria was seen. And Nitrosomonas europaea was the predominant AOB in SNAD system treating sewage, while Candidatus Brocadia was the dominant anammox bacteria.
[Mh] Termos MeSH primário: Desnitrificação
Nitrificação
Oxigênio/química
[Mh] Termos MeSH secundário: Amônia
Reatores Biológicos
Hibridização in Situ Fluorescente
Nitrogênio
Oxirredução
RNA Ribossômico 16S
Purificação da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S); 7664-41-7 (Ammonia); N762921K75 (Nitrogen); S88TT14065 (Oxygen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171204
[Lr] Data última revisão:
171204
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170502
[St] Status:MEDLINE


  3 / 1477 MEDLINE  
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[PMID]:28470424
[Au] Autor:Hong X; Chen Z; Zhao C; Yang S
[Ad] Endereço:Department of Bioengineering and Biotechnology, Huaqiao University, No. 668 Jimei Ave, Xiamen, 361021, People's Republic of China.
[Ti] Título:Nitrogen transformation under different dissolved oxygen levels by the anoxygenic phototrophic bacterium Marichromatium gracile.
[So] Source:World J Microbiol Biotechnol;33(6):113, 2017 Jun.
[Is] ISSN:1573-0972
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Marichromatium gracile: YL28 (M. gracile YL28) is an anoxygenic phototrophic bacterial strain that utilizes ammonia, nitrate, or nitrite as its sole nitrogen source during growth. In this study, we investigated the removal and transformation of ammonium, nitrate, and nitrite by M. gracile YL28 grown in a combinatorial culture system of sodium acetate-ammonium, sodium acetate-nitrate and sodium acetate-nitrite in response to different initial dissolved oxygen (DO) levels. In the sodium acetate-ammonium system under aerobic conditions (initial DO = 7.20-7.25 mg/L), we detected a continuous accumulation of nitrate and nitrite. However, under semi-anaerobic conditions (initial DO = 4.08-4.26 mg/L), we observed a temporary accumulation of nitrate and nitrite. Interestingly, under anaerobic conditions (initial DO = 0.36-0.67 mg/L), there was little accumulation of nitrate and nitrite, but an increase in nitrous oxide production. In the sodium acetate-nitrite system, nitrite levels declined slightly under aerobic conditions, and nitrite was completely removed under semi-anaerobic and anaerobic conditions. In addition, M. gracile YL28 was able to grow using nitrite as the sole nitrogen source in situations when nitrogen gas produced by denitrification was eliminated. Taken together, the data indicate that M. gracile YL28 performs simultaneous heterotrophic nitrification and denitrification at low-DO levels and uses nitrite as the sole nitrogen source for growth. Our study is the first to demonstrate that anoxygenic phototrophic bacteria perform heterotrophic ammonia-oxidization and denitrification under anaerobic conditions.
[Mh] Termos MeSH primário: Anaerobiose/fisiologia
Chromatiaceae/metabolismo
Nitrogênio/metabolismo
Oxigênio/metabolismo
Processos Fototróficos/fisiologia
[Mh] Termos MeSH secundário: Acetatos/metabolismo
Aerobiose/fisiologia
Amônia/metabolismo
Compostos de Amônio/metabolismo
Bactérias
Chromatiaceae/crescimento & desenvolvimento
Desnitrificação
Processos Heterotróficos/fisiologia
Cinética
Nitratos/metabolismo
Nitrificação
Nitritos/metabolismo
Óxido Nitroso/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Acetates); 0 (Ammonium Compounds); 0 (Nitrates); 0 (Nitrites); 7664-41-7 (Ammonia); K50XQU1029 (Nitrous Oxide); N762921K75 (Nitrogen); RRE756S6Q2 (ammonium acetate); S88TT14065 (Oxygen)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171201
[Lr] Data última revisão:
171201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170505
[St] Status:MEDLINE
[do] DOI:10.1007/s11274-017-2280-z


  4 / 1477 MEDLINE  
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[PMID]:28841790
[Au] Autor:Roy D; McEvoy J; Blonigen M; Amundson M; Khan E
[Ad] Endereço:Environmental and Conservation Sciences Program (#2820), North Dakota State University, Fargo, ND 58108-6050, USA; Department of Civil and Environmental Engineering (#2470), North Dakota State University, Fargo, ND 58108-6050, USA.
[Ti] Título:Seasonal variation and ex-situ nitrification activity of ammonia oxidizing archaea in biofilm based wastewater treatment processes.
[So] Source:Bioresour Technol;244(Pt 1):850-859, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The abundance of ammonia oxidizing archaea (AOA) and ammonia oxidizing bacteria (AOB) was investigated in full-scale two-stage trickling filters (TF) and moving bed bioreactor (MBBR) treating municipal wastewater. Biofilm samples were collected for 17months from nitrifying TF (NTF), biochemical oxygen demand TF (BTF), and MBBR media. The abundance of AOA and AOB was determined using a quantitative PCR approach targeting the ammonia monooxygenase subunit A gene of archaea and bacteria. AOA were dominant in the NTF and MBBR, while AOB dominated in the BTF. AOA and AOB were more abundant during warmer months, and AOA were detected in the BTF only during warmer months. In laboratory nitrification activity experiments, ammonia oxidation to nitrite decreased when AOA populations from the NTF and MBBR were inhibited, demonstrating that AOA contributed to nitrification. This study has shown that AOA outnumber AOB and contribute to ammonia oxidation in full-scale nitrifying biofilm processes.
[Mh] Termos MeSH primário: Archaea
Nitrificação
Águas Residuais
[Mh] Termos MeSH secundário: Amônia
Bactérias
Biofilmes
Oxirredução
Filogenia
Estações do Ano
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Waste Water); 7664-41-7 (Ammonia)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170827
[St] Status:MEDLINE


  5 / 1477 MEDLINE  
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[PMID]:28803098
[Au] Autor:Rout PR; Bhunia P; Dash RR
[Ad] Endereço:School of Infrastructure, Indian Institute of Technology Bhubaneswar, Odisha 751 013, India.
[Ti] Título:Simultaneous removal of nitrogen and phosphorous from domestic wastewater using Bacillus cereus GS-5 strain exhibiting heterotrophic nitrification, aerobic denitrification and denitrifying phosphorous removal.
[So] Source:Bioresour Technol;244(Pt 1):484-495, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A newly isolated GS-5 strain exhibiting heterotrophic nitrification, aerobic denitrification and denitrifying phosphorous removal was identified as Bacillus cereus GS-5 based on its phenotypic and phylogenetic characteristics. The isolate had exhibited efficient NH -N, NO -N, NO -N and PO -P removal from nutrient spiked real domestic wastewater with average rates of 2.62, 2.69, 1.16 and 0.42mgL h , respectively under aerobic condition. Metabolic inhibitor based mass balance analysis indicated that dinitrogen gas (41%), intracellular nitrogen (29%) and intracellular phosphorous (60%) were the major fates of the initial NH -N and PO -P. The successfully expression of hydroxylamine oxidase (hao), nitrate reductase (nar), nitrite reductase (nir) and poly phosphate kinase (ppk) enzyme in the cell free extracts and PCR amplification of nar, nir and ppk genes in the isolated strain provided further evidences for the nutrient removal possibility. A possible pathway of for nitrogen removal by GS-5 is suggested.
[Mh] Termos MeSH primário: Desnitrificação
Águas Residuais
[Mh] Termos MeSH secundário: Aerobiose
Bacillus cereus
Processos Heterotróficos
Nitrificação
Nitrogênio
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Waste Water); N762921K75 (Nitrogen)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170814
[St] Status:MEDLINE


  6 / 1477 MEDLINE  
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[PMID]:28801172
[Au] Autor:Qian W; Peng Y; Li X; Zhang Q; Ma B
[Ad] Endereço:National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, PR China.
[Ti] Título:The inhibitory effects of free ammonia on ammonia oxidizing bacteria and nitrite oxidizing bacteria under anaerobic condition.
[So] Source:Bioresour Technol;243:1247-1250, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The free ammonia (FA) inhibition on ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) under anaerobic condition was investigated in this study. The results indicated that NOB was more sensitive to the FA anaerobic treatment than AOB. The FA anaerobic inhibition on nitrifier gradually heightened with the increase of FA concentration. Accompanied with FA concentration increase from 0 to 16.82mgNH -N·L (the highest concentration adopted in this study), the activity of AOB reduced by 15.9%, while NOB decreased by 29.2%. After FA anaerobic treatment, nitrite was accumulated during nitrification. However, the nitrite accumulation disappeared on the sixth cycle of activity recovery tests with excessive aeration. Based on this result, a novel strategy for achieving nitritation is proposed, which involves recirculating a portion of the activated sludge through a side-line sludge treatment unit, where the sludge is subjected to treatment with FA under anaerobic condition.
[Mh] Termos MeSH primário: Amônia
Esgotos
[Mh] Termos MeSH secundário: Bactérias
Reatores Biológicos
Nitrificação
Nitritos
Oxirredução
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Nitrites); 0 (Sewage); 7664-41-7 (Ammonia)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171023
[Lr] Data última revisão:
171023
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170813
[St] Status:MEDLINE


  7 / 1477 MEDLINE  
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[PMID]:28783565
[Au] Autor:Qian G; Hu X; Li L; Ye L; Lv W
[Ad] Endereço:School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, PR China.
[Ti] Título:Effect of iron ions and electric field on nitrification process in the periodic reversal bio-electrocoagulation system.
[So] Source:Bioresour Technol;244(Pt 1):382-390, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study explored the nitrification mechanism of a periodic reversal bio-electrocoagulation system with Fe-C electrodes. The ammonia nitrogen removal was compared in four identical cylindrical sequencing bath reactors. Two of them were reactors with Fe-C electrodes (S1) and C-C electrodes (S2), respectively. The other two were a reactor with iron ions (S3) and a traditional SBR (S4), respectively. The results demonstrated that the effect on enhancing nitrification in S1 was the best among all four SBRs, followed by S3, S2 and S4. Iron ions increased the biomass, and electric field improved the proton transfer and enzyme activity. The dominant bacterial genera in the four SBRs were Hyphomicrobium, Thauera, Nitrobacter, Nitrosomonas, Paracoccus and Hydrogenophaga. The iron ions may increase the levels of Nitrosomonas and Nitrobacter, both of which were the main microbes of the nitrification process. This study provided a significant and meaningful understanding of nitrification in a bio-electrocoagulation system.
[Mh] Termos MeSH primário: Eletrocoagulação
Ferro
Nitrificação
[Mh] Termos MeSH secundário: Amônia
Reatores Biológicos
Íons
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Ions); 7664-41-7 (Ammonia); E1UOL152H7 (Iron)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171106
[Lr] Data última revisão:
171106
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170808
[St] Status:MEDLINE


  8 / 1477 MEDLINE  
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[PMID]:28780360
[Au] Autor:Kinh CT; Suenaga T; Hori T; Riya S; Hosomi M; Smets BF; Terada A
[Ad] Endereço:Department of Chemical Engineering, Tokyo University of Agriculture and Technology, Naka 2-24-16, Koganei, Tokyo, 184-8588, Japan.
[Ti] Título:Counter-diffusion biofilms have lower N O emissions than co-diffusion biofilms during simultaneous nitrification and denitrification: Insights from depth-profile analysis.
[So] Source:Water Res;124:363-371, 2017 Nov 01.
[Is] ISSN:1879-2448
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The goal of this study was to investigate the effectiveness of a membrane-aerated biofilm reactor (MABR), a representative of counter-current substrate diffusion geometry, in mitigating nitrous oxide (N O) emission. Two laboratory-scale reactors with the same dimensions but distinct biofilm geometries, i.e., a MABR and a conventional biofilm reactor (CBR) employing co-current substrate diffusion geometry, were operated to determine depth profiles of dissolved oxygen (DO), nitrous oxide (N O), functional gene abundance and microbial community structure. Surficial nitrogen removal rate was slightly higher in the MABR (11.0 ± 0.80 g-N/(m day) than in the CBR (9.71 ± 0.94 g-N/(m day), while total organic carbon removal efficiencies were comparable (96.9 ± 1.0% for MABR and 98.0 ± 0.8% for CBR). In stark contrast, the dissolved N O concentration in the MABR was two orders of magnitude lower (0.011 ± 0.001 mg N O-N/L) than that in the CBR (1.38 ± 0.25 mg N O-N/L), resulting in distinct N O emission factors (0.0058 ± 0.0005% in the MABR vs. 0.72 ± 0.13% in the CBR). Analysis on local net N O production and consumption rates unveiled that zones for N O production and consumption were adjacent in the MABR biofilm. Real-time quantitative PCR indicated higher abundance of denitrifying genes, especially nitrous oxide reductase (nosZ) genes, in the MABR versus the CBR. Analyses of the microbial community composition via 16S rRNA gene amplicon sequencing revealed the abundant presence of the genera Thauera (31.2 ± 11%), Rhizobium (10.9 ± 6.6%), Stenotrophomonas (6.8 ± 2.7%), Sphingobacteria (3.2 ± 1.1%) and Brevundimonas (2.5 ± 1.0%) as potential N O-reducing bacteria in the MABR.
[Mh] Termos MeSH primário: Biofilmes
Reatores Biológicos
Desnitrificação
[Mh] Termos MeSH secundário: Bactérias/genética
Bactérias/metabolismo
Nitrificação
Óxido Nitroso
RNA Ribossômico 16S
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S); K50XQU1029 (Nitrous Oxide)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171018
[Lr] Data última revisão:
171018
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170807
[St] Status:MEDLINE


  9 / 1477 MEDLINE  
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[PMID]:28779678
[Au] Autor:Ma W; Han Y; Ma W; Han H; Zhu H; Xu C; Li K; Wang D
[Ad] Endereço:State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
[Ti] Título:Enhanced nitrogen removal from coal gasification wastewater by simultaneous nitrification and denitrification (SND) in an oxygen-limited aeration sequencing batch biofilm reactor.
[So] Source:Bioresour Technol;244(Pt 1):84-91, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Simultaneous nitrification and denitrification (SND) for treating coal gasification wastewater (CGW) was achieved successfully in a lab-scale sequencing batch biofilm reactor (SBBR) by oxygen-limited aeration. SND efficiency increased gradually with the concentration of dissolved oxygen (DO) decreased from 4.5mg/L to 0.35mg/L. The maximum SND efficiency of 81.23% was obtained at DO concentration of 0.35mg/L, and the corresponding removal efficiency of NH -N and TN reached 76.91% and 70.23%, respectively. Meanwhile, COD was removed significantly and toxic compounds were degraded into biodegradable substances, which relieved effectively the inhibition on nitrogen removal. The results indicated that oxygen-limited condition performed greater toxic compounds and nitrogen removal compared with the aerobic condition. Furthermore, the results of scanning electron microscopic (SEM) and microbial community structure confirmed robust biofilm formation provided a suitable anoxic micro-environment for co-existence of nitrifying and denitrifying bacteria and organics degradation bacteria in the reactor at oxygen-limited condition.
[Mh] Termos MeSH primário: Biofilmes
Carvão Mineral
Desnitrificação
Águas Residuais
[Mh] Termos MeSH secundário: Reatores Biológicos
Nitrificação
Nitrogênio
Oxigênio
Eliminação de Resíduos Líquidos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Coal); 0 (Waste Water); N762921K75 (Nitrogen); S88TT14065 (Oxygen)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170806
[St] Status:MEDLINE


  10 / 1477 MEDLINE  
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[PMID]:28779671
[Au] Autor:Li J; Zhang L; Peng Y; Zhang Q
[Ad] Endereço:National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
[Ti] Título:Effect of low COD/N ratios on stability of single-stage partial nitritation/anammox (SPN/A) process in a long-term operation.
[So] Source:Bioresour Technol;244(Pt 1):192-197, 2017 Nov.
[Is] ISSN:1873-2976
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:This study investigates the effects of varying COD/N ratios on single-stage partial nitritation/anammox (SPN/A) process in a SBR. The operational period was divided into three phases with different influent COD/N ratios (0.4, 0 and 0.5). Stable nitrogen removal was achieved in phase I with a COD/N of 0.4. In phase II COD was absent, effluent nitrite and nitrate increased and nitrogen removal performance gradually deteriorated. In phase III SPN/A failed to recover from nitrate accumulation when COD/N was increased. Microbial activity was measured and microbial community was analyzed by high-throughput sequencing. These results revealed that ordinary heterotrophic organisms (OHO) was suppressed when influent COD was absent, leading to the promotion of nitrification even at a low DO (0.2mgL ). Therefore, nitrite oxidizing bacteria (NOB) was gradually enriched and anammox bacteria was suppressed. Besides, it was observed that flocs were sensitive to influent COD variations than granules, which requires further investigation.
[Mh] Termos MeSH primário: Reatores Biológicos
Nitrificação
[Mh] Termos MeSH secundário: Nitratos
Nitritos
Nitrogênio
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Nitrates); 0 (Nitrites); N762921K75 (Nitrogen)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170806
[St] Status:MEDLINE



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