PERFORMANCE OF NITROGEN REMOVAL AND MICROBIAL INTERACTION IN A TWO-STAGE DYNAMIC MEMBRANE BIOREACTOR
-
摘要: 动态膜对跨膜压差要求较低,在保证悬浮物去除效果同时对减少能耗有关键作用。同时,动态膜也可以保护用于低C/N污水脱氮的厌氧氨氧化菌(AMX)。在设置动态膜的A/O工艺中处理低C/N废水,将异养菌和自养菌在A和O池中进行分离,并在O池絮状污泥中富集好氧氨氧化菌(AOB),生物膜上富集厌氧氨氧化菌(AMX)。反应器在C/N=1情况下,NH3-N、TN和COD去除率分别为(91.2±7.5)%、(81.0±8.1)%和(86.4±7.5)%。COD主要在A池去除,TN主要在O池去除。重力驱动出水的动态膜运行效果良好,稳定运行下出水ρ(SS)为(12.2±4.5) mg/L。系统利用动态膜和生物膜实现了功能菌之间的空间分离,反硝化菌主要分布在A池(相对丰度约30%),AOB主要分布在O池中悬浮污泥(相对丰度约5%),而AMX富集在O池生物膜上(相对丰度>20%)。生态网络分析显示,微生物群落中的正相关关系比例均超过70%,保证了系统的良好性能。可见,PN/A、动态膜及A/O结合工艺可提高不同功能微生物协同作用,在低C/N污水脱氮方面有较好效果,具有良好应用前景。Abstract: Dynamic membrane(DM) requires a low transmembrane pressure, which plays a key role in suspended solid removal and energy saving during wastewater treatment. DM can also protect anaerobic ammonium-oxidizing bacteria(AMX) which is used to increase nitrogen removal efficiency in wastewater with low C/N ratio. DM separated heterotrophs and autotrophs in A/O reactor treating low C/N wastewater into anaerobic tank and aerobic tank, respectively. Ammonium-oxidizing bacteria(AOB) was enriched in suspended sludge, and anaerobic ammonium-oxidizing bacteria(AMX) was enriched in biofilms of the O tank. Removal efficiency of ammonium, total nitrogen, and COD were(91.2±7.5)%,(81.0±8.1)%, and(86.4±7.5)%, respectively, with an influent C/N value of 1.0. COD was mainly removed in the A tank and total nitrogen in the O tank. Gravity-driven dynamic membranes achieved satisfactory suspended solid removal with a concentration of(12.2±4.5) mg/L in the effluent. Functional bacteria were enriched in different parts of the reactor by using dynamic membranes and biofilms. Denitrifiers were mainly present in the anaerobic tank(relative abundance of ca. 30%). The AOB was mainly enrich in suspended sludge in aerobic tank sludge, with relative abundance of ca. 5%, and anammox bacteria were abundant in the biofilm of the O tank.Resultsfrom network analysis showed that positive interactions accounted for more than 70% of all interactions among microbes in each community, which ensured the performance of the reactor. In summary, the combination of PN/A, DM, and A/O process, which improved the synergy of different functional bacteria and ensured nitrogen removal in wastewater with low C/N ratio, was a promising method for wastewater treatment.
-
[1] 邓玮玮,王晓昌.低碳氮比废水脱氮研究进展[J].工业水处理,2015,35(2):15-19. [2] KUENEN J G.Anammox bacteria:from discovery to application[J].Nature Reviews Microbiology,2008,6(4):320-326. [3] 李冬,王艳菊,吕育锋,等.有机碳源对启动及运行CANON颗粒污泥工艺的影响[J].环境科学,2018,39(3):1294-1300. [4] 刘威,HUEXAY L,代伟,等.少量有机碳对单级自养脱氮工艺性能的影响[J].水处理技术,2020,46(4):66-69,92. [5] DING C,ENYI F O,ADRIAN L.Anaerobic ammonium oxidation (anammox) with planktonic cells in a redox-stable semicontinuous stirred-tank reactor[J].Environmental Science & Technology,2018,52(10):5671-5681. [6] VAN DER STAR W R,MICLEA A I,VAN DONGEN U G,et al.The membrane bioreactor:a novel tool to grow anammox bacteria as free cells[J].Biotechnology and Bioengineering,2008,101(2):286-294. [7] TAO Y,GAO D W,FU Y,et al.Impact of reactor configuration on anammox process start-up:MBR versus SBR[J].Bioresource Technology,2012,104:73-80. [8] MENG F G,CHAE S R,DREWS A,et al.Recent advances in membrane bioreactors (MBRs):membrane fouling and membrane material[J].Water Research,2009,43(6):1489-1512. [9] FAN B,HUANG X.Characteristics of a self-forming dynamic membrane coupled with a bioreactor for municipal wastewater treatment[J].Environmental Science & Technology,2002,36(23):5245-5251. [10] ZHU Y J,CAO L J,WANG Y Y.Characteristics of a self-forming dynamic membrane coupled with a bioreactor in application of anammox processes[J].Environental Science & Technology,2019,53(22):13158-13167. [11] LUO X N,SHEN L W,MENG F F.Response of microbial community structures and functions of nitrosifying consortia to biorefractory humic substances[J].ACS Sustainable Chemistry & Engineering,2019,7(5):4744-4754. [12] DUBOIS M,GILLES K A,HAMILTON J K,et al.Colorimetric method for determination of sugars and related substances[J].Analytical Chemistry,1956,28(3):350-356. [13] LOWRY O H,NIRA J,ROSEBROUGH A,et al.Protein measurement with the Folin phenol reagent[J].Journal Biological Chemistry,1951,193(1):265-275. [14] MA B,QIAN W T,YUAN C S,et al.Achieving mainstream nitrogen removal through coupling anammox with denitratation[J].Environmental Science & Technology,2017,51(15):8405-8413. [15] AGRAWAL S,SEUNTJENS D,DE COCKER P,et al.Success of mainstream partial nitritation/anammox demands integration of engineering,microbiome and modeling insights[J].Current Opinion Biotechnology,2018,50:214-221. [16] 程刚,朱雷,许颖,等.厌氧动态膜生物反应器中动态膜形成及其运行周期的影响因素分析[J].环境工程学报,2018,12(5):1408-1415. [17] SONG B,PALLERONI N J,KERKHOF L J,et al.Characterization of halobenzoate-degrading,denitrifying Azoarcus and Thauera isolates and description of Thauera chlorobenzoica sp.nov[J].International Journal of Systematic and Evolutionary Microbiolgy,2001,51(2):589-602. [18] VANDAMME P,VANCANNEYT M,POT B,et al.Polyphasic taxonomic study of the emended genus Arcobacter with Arcobacter butzleri comb.nov.and Arcobacter skirrowii sp.nov.,an aerotolerant bacterium isolated from veterinary specimens[J].International Jounral of Systematic and Evolutionary Microbiology,1992,42(3):344-356. [19] THRASH J C,POLLOCK J,TOROK T,et al.Description of the novel perchlorate-reducing bacteria Dechlorobacter hydrogenophilus gen.nov.,sp.nov.and Propionivibrio militaris,sp.nov[J].Applied Microbiology and Biotechnology,2010,86(1):335-343. [20] KALLSCHEUER N,WIEGAND S,HEUER A,et al.Blastopirellula retiformator sp.nov.isolated from the shallow-sea hydrothermal vent system close to Panarea Island[J].Antonie Van Leeuwenhoek,2020,113:1811-1822. [21] LEE H W,ROH S W,SHIN N R,et al.Blastopirellula cremea sp.nov.,isolated from a dead ark clam[J].International Jounral of Systematic and Evolutionary Microbiology,2013,63(6):2314-2319. [22] DUAN Y,JIANG Z,WU Z,et al.Limnobacter alexandrii sp.nov.,a thiosulfate-oxidizing,heterotrophic and EPS-bearing Burkholderiaceae isolated from cultivable phycosphere microbiota of toxic Alexandrium catenella LZT09[J].Antonie Van Leeuwenhoek,2020,113(11):1689-1698. [23] KARTAL B,MAALCKE W J,DE ALMEIDA N M,et al.Molecular mechanism of anaerobic ammonium oxidation[J].Nature,2011,479(7371):127-130. [24] KELUSKAR R,NERURKAR A,DESAI A.Mutualism between autotrophic ammonia-oxidizing bacteria (AOB) and heterotrophs present in an ammonia-oxidizing colony[J].Archives of Microbiology,2013,195(10/11):737-747. [25] SEDLACEK C J,NIELSEN S,GREIS K D,et al.Effects of bacterial community members on the proteome of the ammonia-oxidizing bacterium Nitrosomonas sp.strain Is79[J].Applied and Environmental Microbiology,2016,82(15):4776-4788. [26] JU F,ZHANG T.Bacterial assembly and temporal dynamics in activated sludge of a full-scale municipal wastewater treatment plant[J].The ISME Journal,2015,9(3):683-695. [27] KELLER L,SURETTE M.Communication in bacteria:an ecological and evolutionary perspective[J].Nature Reviews Microbiology,2006,4(4):249-258. [28] RAST P,GLÖCKNER I,BOEDEKER C,et al.Three novel species with peptidoglycan cell walls form the new genus Lacunisphaera gen.nov.in the family opitutaceae of the verrucomicrobial subdivision 4[J].Frontiers in Microbiology,2017,13(8):202. [29] YAMADA T,SEKIGUCHI Y,HANADA S,et al.Anaerolinea thermolimosa sp.nov.,Levilinea saccharolytica gen.nov.,sp.nov.and Leptolinea tardivitalis gen.nov.,sp.nov.,novel filamentous anaerobes,and description of the new classes Anaerolineae classis nov.and Caldilineae classis nov.in the bacterial phylum Chloroflexi[J].International Journal of Systematic and Evolutionary Microbiology,2006,56(6):1331-1340.
点击查看大图
计量
- 文章访问数: 116
- HTML全文浏览量: 11
- PDF下载量: 5
- 被引次数: 0