梯度曝气SBR除磷亚硝化颗粒处理生活污水
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摘要
为实现生活污水中总磷和有机物的去除,同时实现部分亚硝化,在常温条件下(17～19℃),采用SBR反应器接种配水培养的强化生物除磷颗粒污泥,对生活污水的除磷亚硝化效果进行研究.结果表明,配水启动的强化生物除磷颗粒污泥经过27 d的培养可以实现生活污水除磷,出水总磷(TP)质量浓度达到1 mg/L以下,厌氧释磷量/厌氧COD去除量(Δρ_(TP)/Δρ_(COD))达到0.3;采取前90 min高曝气(500 mL/min),后120 min低曝气(200 mL/min)的梯度曝气运行模式,可以使亚硝酸盐积累率(R_(NA))从0增长到90%以上,亚硝酸盐氮(NO~-_2-N)质量浓度达到10 mg/L,同时TP及COD出水分别保持在0.5和50 mg/L以下.随工艺运行颗粒粒径从1 200μm下降到1 090μm,SVI值从32 mL/g降低到29 mL/g,蛋白与多糖比(PN与PS比)从2.0降低到1.2.生活污水虽然会导致颗粒粒径略微减小,但仍能保持在1 000μm以上,且使颗粒获得更好的沉降性能.采取高低梯度曝气方式可以实现除磷和亚硝化,总磷去除率达到95%,R_(NA)达到90%以上,且颗粒性能稳定.
In order to remove total phosphorus(TP) and organic matter in domestic sewage and achieve partial nitrification, an enhanced biological phosphorus removal granular sludge, which was cultivated with synthetic wastewater at room temperature(17-19 ℃), was used as inoculated sludge in this study. The effect of phosphorus removal and nitrosation on domestic sewage was studied. The experiment showed that the phosphorus removal of the granular sludge could be achieved through 27 d cultivation. The TP concentration of effluent could reach less than 1 mg/L and the TP release in anaerobic stage Δρ_(TP)/ρ_(COD) removal in anaerobic stage(Δρ_(COD)) could reach 0.3. The change of the aeration methods could make R_(NA) increase from 0 to 90% in a short time. The concentration of NO~-_2-N reached 10 mg/L,and the concentration of TP and COD in the effluent were kept below 0.5 and 50 mg/L, respectively. The particle size decreased from 1 200 μm to 1 000 μm and the value of SVI reduced from 32 mL/g to 29 mL/g. The ratio of protein(PN) to polysaccharide(PS) dropped from 2.0 to 1.2. Although the particle size slightly decreased due to domestic sewage, it remained larger than 1 000 μm and the particles possessed better settleability. Thus, the adoption of high and low gradient aeration can achieve phosphorus removal and nitrosation with the removal rate of TP reaching 95%, R_(NA) reaching over 90%, and the particle performance remaining stable.
In order to remove total phosphorus(TP) and organic matter in domestic sewage and achieve partial nitrification, an enhanced biological phosphorus removal granular sludge, which was cultivated with synthetic wastewater at room temperature(17-19 ℃), was used as inoculated sludge in this study. The effect of phosphorus removal and nitrosation on domestic sewage was studied. The experiment showed that the phosphorus removal of the granular sludge could be achieved through 27 d cultivation. The TP concentration of effluent could reach less than 1 mg/L and the TP release in anaerobic stage Δρ_(TP)/ρ_(COD) removal in anaerobic stage(Δρ_(COD)) could reach 0.3. The change of the aeration methods could make R_(NA) increase from 0 to 90% in a short time. The concentration of NO~-_2-N reached 10 mg/L,and the concentration of TP and COD in the effluent were kept below 0.5 and 50 mg/L, respectively. The particle size decreased from 1 200 μm to 1 000 μm and the value of SVI reduced from 32 mL/g to 29 mL/g. The ratio of protein(PN) to polysaccharide(PS) dropped from 2.0 to 1.2. Although the particle size slightly decreased due to domestic sewage, it remained larger than 1 000 μm and the particles possessed better settleability. Thus, the adoption of high and low gradient aeration can achieve phosphorus removal and nitrosation with the removal rate of TP reaching 95%, R_(NA) reaching over 90%, and the particle performance remaining stable.
引文
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[18]PIJUAN M,LIU Ye,YUAN Zhiguo.Free nitrous acid inhibition on the aerobic metabolism of poly-phosphate accumulating organisms[J].Water Research,2010,44(20):6063.DOI:10.1016/j.watres.2010.07.075
[19]SAITO T,BRDJANOVIC D,VAN LOOSDRECHT M C.Effect of nitrite on phosphate uptake by phosphate accumulating organisms[J].Water Research,2004,38(17):3760.DOI:10.1016/j.watres.2004.05.023
[20]CHEN Yao,JIANG Wenju,LIANG D,et al.Structure and stability of aerobic granules cultivated under different shear force in sequencing batch reactors[J].Applied Microbiology & Biotechnology,2007,76(5):1199.DOI:10.1007/s00253-007-1085-7
[21]SHENG Guoping,YU Hanqing,LI Xiaoyan.Extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment systems:A review[J].Biotechnology Advances,2010,28(6):882.DOI:10.1016/j.biotechadv.2010.08.001
[22]KJELLEBERG S,HERMANSSON M.Starvation-induced effects on bacterial surface characteristics[J].Applied & Environmental Microbiology,1984,48(3):497
[23]DUUJONG L,CHEN Y Y,KUANYEOW S,et al.Advances in aerobic granule formation and granule stability in the course of storage and reactor operation[J].Biotechnology Advances,2010,28(6):919.DOI:10.1016/j.biotechadv.2010.08.007
[2]SLIEKERS A O,DERWORT N,GOMEZ J L C,et al.Completely autotrophic nitrogen removal over nitrite in one single reactor[J].Water Research,2002,36(10):2475.DOI:10.1016/S0043-1354(01)00476-6
[3]POLLICE A,TANDOI V,LESTINGI C.Influence of aeration and sludge retention time on ammonium oxidation to nitrite and nitrate[J].Water Research,2002,36(10):2541.DOI:10.1016/S0043-1354(01)00468-7
[4]OEHMEN A,LEMOS P C,CARVALHO G,et al.Advances in enhanced biological phosphorus removal:From micro to macro scale[J].Water Research,2007,41(11):2271.DOI:10.1016/j.watres.2007.02.030
[5]王俊安.厌氧好氧除磷厌氧氨氧化脱氮城市污水再生全流程研究[D].北京:北京工业大学,2010WANG Junan.Integrated process of anaerobic-oxic phosphorus removal and anaerobic ammonium oxidation nitrogen removal for urban sewage regeneration[D].Beijing:Beijing University of Technology,2010
[6]马斌,张树军,王俊敏,等.A/O工艺实现城市污水半亚硝化与生物除磷[J].哈尔滨工业大学学报,2012,44(2):70MA Bin,ZHANG Shujun,WANG Junmin,et al.Partial nitritation and biological phosphorus removal in A/O process treating municipal wastewater[J].Journal of Harbin Institute of Technology,2012,44(2):70
[7]周元正,李冬,苏东霞,等.改良SBR工艺实现生活污水除磷与半亚硝化[J].中国环境科学,2015,35(5):1351ZHOU Yuanzheng,LI Dong,SU Dongxia,et al.Partial nitritation and phosphorus removal in improved SBR process treating domestic wastewater[J].China Environmental Science,2015,35(5):1351
[8]LI Dong,LV Yufeng,CAO Meizhong,et al.Optimized hydraulic retention time for phosphorus and COD removal from synthetic domestic sewage with granules in a continuous-flow reactor[J].Bioresource Technology,2016,216:1083.DOI:10.1016/j.biortech.2016.05.061
[9]LI Dong,LV Yufeng,ZENG Huiping,et al.Effect of sludge retention time on continuous-flow system with enhanced biological phosphorus removal granules at different COD loading[J].Bioresource Technology,2016,219:14.DOI:10.1016/j.biortech.2016.07.093
[10]李冬,吕育锋,张金库,等.SBR中曝气强度对除磷颗粒的影响[J].化工学报,2015,66(12):4994LI Dong,LV Yufeng,ZHANG Jinku,et al.Influence of aeration intensity on phosphorus removal granules in SBR[J].CIESC Journal,2015,66(12):4994
[11]国家环境保护局.水和废水监测分析方法[M].北京:中国环境科学出版社,2002:100Ministry of Environmental Protection of China.Monitoring and analysis method of water and wastewater[M].Beijing:China Environmental Science Press,2002:100
[12]WANG Zhiping,LIU Lili,YAO Jie,et al.Effects of extracellular polymeric substances on aerobic granulation in sequencing batch reactors[J].Chemosphere,2006,63(10):1728.DOI:10.1016/j.chemosphere.2005.09.018
[13]WINKLER M K,BASSIN J P,KLEEREBEZEM R,et al.Selective sludge removal in a segregated aerobic granular biomass system as a strategy to control PAO-GAO competition at high temperatures[J].Water Research,2011,45(11):3291.DOI:10.1016/j.watres.2011.03.024
[14]李亚峰,秦亚敏,谢新立,等.间歇曝气条件下短程硝化的实现及影响因素研究[J].环境工程学报,2011,5(7):1518LI Yafeng,QIN Yamin,XIE Xinli,et al.Study on achievement and influencing factors of shortcut nitrification in intermittent aeration[J].Chinese Journal of Environmental Engineering,2011,5(7):1518
[15]ZENG Wei,YANG Yingying,LI Lei,et al.Effect of nitrite from nitritation on biological phosphorus removal in a sequencing batch reactor treating domestic wastewater[J].Bioresource Technology,2011,102(12):6657.DOI:10.1016/j.biortech.2011.03.091
[16]ZOU Jinte,LI Yongmei,ZHANG Lili,et al.Understanding the impact of influent nitrogen concentration on granule size and microbial community in a granule-based enhanced biological phosphorus removal system[J].Bioresource Technology,2015,177(177C):209.DOI:10.1016/j.biortech.2014.11.093
[17]MINO T,LOOSDRECHT M C M V,HEIJNEN J J.Microbiology and biochemistry of the enhanced biological phosphate removal process[J].Water Research,1998,32(11):31937
[18]PIJUAN M,LIU Ye,YUAN Zhiguo.Free nitrous acid inhibition on the aerobic metabolism of poly-phosphate accumulating organisms[J].Water Research,2010,44(20):6063.DOI:10.1016/j.watres.2010.07.075
[19]SAITO T,BRDJANOVIC D,VAN LOOSDRECHT M C.Effect of nitrite on phosphate uptake by phosphate accumulating organisms[J].Water Research,2004,38(17):3760.DOI:10.1016/j.watres.2004.05.023
[20]CHEN Yao,JIANG Wenju,LIANG D,et al.Structure and stability of aerobic granules cultivated under different shear force in sequencing batch reactors[J].Applied Microbiology & Biotechnology,2007,76(5):1199.DOI:10.1007/s00253-007-1085-7
[21]SHENG Guoping,YU Hanqing,LI Xiaoyan.Extracellular polymeric substances (EPS) of microbial aggregates in biological wastewater treatment systems:A review[J].Biotechnology Advances,2010,28(6):882.DOI:10.1016/j.biotechadv.2010.08.001
[22]KJELLEBERG S,HERMANSSON M.Starvation-induced effects on bacterial surface characteristics[J].Applied & Environmental Microbiology,1984,48(3):497
[23]DUUJONG L,CHEN Y Y,KUANYEOW S,et al.Advances in aerobic granule formation and granule stability in the course of storage and reactor operation[J].Biotechnology Advances,2010,28(6):919.DOI:10.1016/j.biotechadv.2010.08.007
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