TREATMENT EFFECT OF MBF BIO-NEST REACTOR ON HIGH-SALINITY INDUSTRIAL LANDFILL LEACHATE WITH DIFFERENT DILUTION RATIOS
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摘要: 为高效处理高盐垃圾渗滤液,使用改性玄武岩纤维(MBF)填料构建新型生物接触氧化反应器,并全面评估形成的生物巢对高盐废水的处理效果。结果表明:MBF生物巢反应器对高盐垃圾渗滤原液中COD、NH4+-N、TN和TP的平均去除率分别达到(26.3±12.4)%、(29.4±8.8)%、(27.6±7.6)%和(16.5±10.4)%,对经1:16稀释的渗透液中相应污染物的去除率则最高提升至(43.7±11.6)%、(59.5±21.4)%、(57.1±12.2)%和(26±8.2)%。废水经处理后,可生化性(B/C)从0.08最高提升至0.36(稀释条件为5:16)。此外,高盐废水还能促使微生物分泌更多的胞外聚合物(EPS),其含量在原水条件下为417.5 mg/g (VSS),而在稀释后(稀释比1:16时)下降至231.6 mg/g (VSS)。微生物种群结构分析显示,Halomonas作为一种好氧硝化-异样反硝化菌属在低稀释比的反应器中相对丰度较高,且随着盐度的降低而降低。对功能基因进行注释发现,盐度主要对生物的氨氧化过程产生抑制,在R-1、R-2和R-3号反应器中未检测出amoABC和hao表达,而反硝化功能酶的表达量也较种泥有所减少。该研究成果显示了MBF生物巢有对高盐水质的抗胁迫能力,为其在高盐垃圾渗滤液生物处理的推广应用提供依据。Abstract: Because of the high salinity and complex composition, high-salt landfill leachate has a strong inhibitory effect on microorganisms, which is difficult to treat directly by traditional biotechnologies. This study used modified basalt fiber (MBF) as the carrier media to construct a new biological contact oxidation reactor, and comprehensively evaluated the treatment effect of the formed biological nest on high-salt wastewater. The results showed that the average removal efficiencies of COD, NH4+-N, TN and TP were (26.3±12.4)%, (29.4±8.8)%, (27.6±7.6)% and (16.5±10.4)%, respectively, for raw wastewater. After gradient dilution, the removal efficiency was increased to (43.7±11.6)%, (59.5±21.4)%, (57.1±12.2)% and (26±8.2)% under a dilution ratio of 1:16; and after treatment, the B/C ratio of wastewater increased from 0.08 to 0.36. In addition, the high-salinity wastewater also promoted the microorganisms to secrete more extracellular polymeric substances (EPS), whose content increased from 231.6 mg/g VSS to 417.5 mg/g VSS under the raw water condition and a dilution ratio of 1:16. The analysis of microbial population structure showed that Halomonas, as an aerobic nitrifying hetero-denitrifying bacteria, has a higher relative abundance with a low dilution ratio, and it decreased with the decrease of salinity. Through the annotation of functional genes, it was found that salinity mainly inhibited the growth of ammonia-oxidizing bacteria (AOB), and the expression of amoABC and hao was not detected in R-1, R-2 and R-3 reactors. Furthermore, the expression of denitrification functional enzymes was also repressed compared with the seed sludge. This study showed that MBF bio-nests were resistant to high-salinity stress, which provides a basis for its application in the biological treatment of high-salinity industrial landfill leachate.
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[1] COSTA A M, ALFAIA R, CAMPOS J C. Landfill leachate treatment in Brazil:an overview[J]. J Environ Manage, 2019, 232(2):110-116. [2] GOTVAJN A Z, TISLER T, ZAGORCKONCAN J. Comparison of different treatment strategies for industrial landfill leachate[J]. J Hazard Mater, 2009, 162(2/3):1446-1456. [3] ZHAO R X, LIU J, FENG J, et al. Microbial community composition and metabolic functions in landfill leachate from different landfills of China[J]. Sci Total Environ, 2021, 767:144861. [4] MORADI M, GHANBARI F. Application of response surface method for coagulation process in leachate treatment as pretreatment for Fenton process:biodegradability improvement[J]. Journal of Water Process Engineering, 2014, 4:67-73. [5] ZHANG Y Q, ZHANG J F, XIAO Y J, et al. Kinetic and mechanistic investigation of azathioprine degradation in water by UV, UV/H2O2and UV/persulfate[J]. Chemical Engineering Journal, 2016, 302:526-534. [6] LIU Z P, WU W H, SHI P, et al. Characterization of dissolved organic matter in landfill leachate during the combined treatment process of air stripping, Fenton, SBR and coagulation[J]. Waste Manag, 2015, 41:111-118. [7] SHE Z L, ZHAO L T, ZHANG X L, et al. Partial nitrification and denitrification in a sequencing batch reactor treating high-salinity wastewater[J]. Chemical Engineering Journal, 2016, 288:207-215. [8] NI H C, ZHOU X T, ZHANG X Y, et al. Feasibility of using basalt fiber as biofilm Carrier to construct bio-nest for wastewater treatment[J]. Chemosphere, 2018, 212:768-776. [9] SHEN M Y, YURAN S, AVIV Y, et al. Electrically responsive, nanopatterned surfaces for triggered delivery of biologically active molecules into cells[J]. ACS Appl Mater Interfaces, 2019, 11(1):1201-1208. [10] FAN J P, JI F X, XU X Y, et al. Prediction of the effect of fine grit on the MLVSS/MLSS ratio of activated sludge[J]. Bioresour Technol, 2015, 190:51-56. [11] ZHANG P, FANG F, CHEN Y P, et al. Composition of EPS fractions from suspended sludge and biofilm and their roles in microbial cell aggregation[J]. Chemosphere, 2014, 117:59-65. [12] 蔡红梅,田子玉.苯酚-硫酸法测定草莓中总糖含量[J].吉林农业,2019(4):46. [13] LOWRY O H, ROSEBROUGH N J, FARR A L,等. 福林酚试剂法测定蛋白质[J]. 食品与药品, 2011, 13(3):147-151. [14] WANG W C, ZHAI S S, XIA Y Y, et al. Ochratoxin A induces liver inflammation:involvement of intestinal microbiota[J]. Microbiome, 2019, 7(1):151. [15] BOKULICH N A, KAEHLER B D, RIDEOUT J R, et al. Optimizing taxonomic classification of marker-gene amplicon sequences with QIIME 2's q2-feature-classifier plugin[J]. Microbiome, 2018, 6(1):90. [16] ROHART F, GAUTIER B, SINGH A, et al. mixOmics:an R package for 'omics feature selection and multiple data integration[J]. PLoS Comput Biol, 2017, 13(11):e1005752. [17] 李长彬, 张利敏, 万莉莉,等. 纳氏试剂分光光度法测定氨氮探讨[J]. 广州化工, 2022, 50(11):106-108. [18] 谷东杰, 刘倩. 碱性过硫酸钾消解紫外分光光度法测定水中总氮[J]. 山东化工, 2020, 49(11):103-105. [19] 叶绍佐. 改进快速消解分光光度法测定高盐垃圾渗滤液中COD[J]. 化学工程师, 2021, 35(10):27-29,55. [20] 鲁蕴甜, 杨颖, 于治森,等. 钼酸铵分光光度法测定总磷的影响因素探讨[J]. 绿色科技, 2021, 23(18):122-123. [21] RAMASWAMI S, JALAL UDDIN F M, BENRENDT J, et al. High-rate nitrification of saline wastewaters using fixed-bed reactors[J]. J Environ Manage, 2019, 243:444-452. [22] JI B X, ZHANG H N, ZHOU L, et al. Effect of the rapid increase of salinity on anoxic-oxic biofilm reactor for treatment of high-salt and high-ammonia-nitrogen wastewater[J]. Bioresour Technol, 2021, 337:125363. [23] WANG J X, LI Z J, WANG Q, et al. Achieving stably enhanced biological phosphorus removal from aerobic granular sludge system via phosphorus rich liquid extraction during anaerobic period[J]. Bioresour Technol, 2022, 346:126439. [24] LIU Q, WU C D, BIN L Y, et al. Distribution characteristics of phosphorus-containing substances in a long running aerobic granular sludge-membrane bioreactor with no sludge discharge[J]. Bioresour Technol, 2022, 347:126694. [25] MOCAN L, ILIE I, MATEA C, et al. Surface plasmon resonance-induced photoactivation of gold nanoparticles as bactericidal agents against methicillin-resistant Staphylococcus aureus[J]. Int J Nanomedicine, 2014, 9:1453-1461. [26] YAO J C, LI W, OU D, et al. Performance and granular characteristics of salt-tolerant aerobic granular reactors response to multiple hypersaline wastewater[J]. Chemosphere, 2021, 265:129170. [27] PENG T, WANG Y Y, WANG J Q, et al. Effect of different forms and components of EPS on sludge aggregation during granulation process of aerobic granular sludge[J]. Chemosphere, 2022, 303(Pt 2):135116. [28] CORSINO S F, CAPODICI M, TORREGROSSA M, et al. Physical properties and Extracellular Polymeric Substances pattern of aerobic granular sludge treating hypersaline wastewater[J]. Bioresource Technology, 2017, 229:152-159. [29] HE J, ZHANG Q, TAN B, et al. Understanding the effect of residual aluminum salt coagulant on activated sludge in sequencing batch reactor:performance response, activity restoration and microbial community evolution[J]. Environ Res, 2022, 212(Pt C):113449. [30] BAREITHER C A, WOLFE G L, MCMAHON K D, et al. Microbial diversity and dynamics during methane production from municipal solid waste[J]. Waste Manag, 2013, 33(10):1982-1992. [31] XU S, LU W J, LIU Y T, et al. Structure and diversity of bacterial communities in two large sanitary landfills in China as revealed by high-throughput sequencing (MiSeq)[J]. Waste Manag, 2017, 63:41-48. [32] MATA J A, MARTHINEZ-CANOVAS J, QUESADA E, et al. A detailed phenotypic characterisation of the type strains of Halomonas species[J]. Syst Appl Microbiol, 2002, 25(3):360-375. [33] SONG T, ZHANG X L, LI J, et al. A review of research progress of heterotrophic nitrification and aerobic denitrification microorganisms (HNADMs)[J]. Sci Total Environ, 2021, 801:149319. [34] POLI A, NICOAUS B, DENIZCI A A, et al. Halomonas smyrnensis sp. nov., a moderately halophilic, exopolysaccharide-producing bacterium[J]. Int J Syst Evol Microbiol, 2013, 63(Pt 1):10-18. [35] GUI X W, LI Z L, WANG Z J. Kitchen waste hydrolysate enhances sewage treatment efficiency with different biological process compared with glucose[J]. Bioresour Technol, 2021, 341:125904. [36] TANG J L, WSNG X C, HU Y S, et al. Nitrogen removal enhancement using lactic acid fermentation products from food waste as external carbon sources:performance and microbial communities[J]. Bioresour Technol, 2018, 56:259-268.
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