A~2/O耦合生物曝气滤池强化污水脱氮除磷
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摘要
为了强化污水脱氮除磷性能,采用厌氧/缺氧/好氧(A~2/O)耦合生物曝气滤池(BAF)组合工艺,考察其对营养盐和有机物去除效果,并进一步探究温度的潜在影响。结果表明:A~2/O耦合BAF能实现有机物和氮、磷的同步深度去除,有机物、TN和TP去除率分别高达90%、85. 2%和93%。温度为15,25,35℃时COD去除率变化不大,基本维持在90%以上,45℃时略低于其他温度。NH_4~+-N去除率随温度的升高呈现上升趋势,NO_2~--N、NO_3~--N去除效果在35℃时最佳,厌氧释磷量和缺氧、好氧吸磷量也在35℃达到最大值。可见,A~2/O耦合BAF系统最佳脱氮除磷温度为35℃。
In order to strengthen the performance of nitrogen and phosphorus removal from wastewater,the combination of anaerobic/anoxic/aerobic( A~2/O) coupled biological aeration filter( BAF) was used to investigate the removal of nutrients and organic matters,and the potential effect of temperature was further researched. The results showed that: A~2/O coupled with BAF could realize the simultaneous deep removed of organic matters,nitrogen and phosphorus,and the removal rates of organic matters,total nitrogen and total phosphorus were as high as 90%,85. 2% and 93%,respectively. The COD removal rate did not change much at 15 ℃,25 ℃ and 35 ℃,remained substantially above 90%,and at 45 ℃ it was slightly lower than that at other temperature conditions. The removal efficiency of NH_4~+-N increased with the increase of temperature. At 35 ℃,NO_2~--N and NO_3~--N had the best removal effect,and the anaerobic phosphorus release and anoxia and aerobic phosphorus absorption were also at the maximum values. Thus,35 ℃ was the optimal denitrification temperature and phosphorus removal temperature in A~2/O coupled BAF system.
In order to strengthen the performance of nitrogen and phosphorus removal from wastewater,the combination of anaerobic/anoxic/aerobic( A~2/O) coupled biological aeration filter( BAF) was used to investigate the removal of nutrients and organic matters,and the potential effect of temperature was further researched. The results showed that: A~2/O coupled with BAF could realize the simultaneous deep removed of organic matters,nitrogen and phosphorus,and the removal rates of organic matters,total nitrogen and total phosphorus were as high as 90%,85. 2% and 93%,respectively. The COD removal rate did not change much at 15 ℃,25 ℃ and 35 ℃,remained substantially above 90%,and at 45 ℃ it was slightly lower than that at other temperature conditions. The removal efficiency of NH_4~+-N increased with the increase of temperature. At 35 ℃,NO_2~--N and NO_3~--N had the best removal effect,and the anaerobic phosphorus release and anoxia and aerobic phosphorus absorption were also at the maximum values. Thus,35 ℃ was the optimal denitrification temperature and phosphorus removal temperature in A~2/O coupled BAF system.
引文
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[8]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
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[10] Wei X C,Viadero J R,Bhojappa S. Phosphorus removal by acid mine drainage sludge from secondary effluents of municipal wastewater treatment plants[J]. Water Research,2008,42(13):3275-3284.
[11] Hao X D,Heijnen J J,Van Loosdrecht M C. Model-based evaluation of temperature and inflow variations on a partial nitrification-ANAMMOX biofilm process[J]. Water Research,2002,36(19):4839-4849.
[12] Kim J H,Guo X J,Park H S. Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation[J]. Process Biochemistry,2008,43(2):154-160.
[13]张玲,彭党聪,常蝶.温度对聚磷菌活性及基质竞争的影响[J].环境科学,2017,38(6):2429-2434.
[14]王亚宜,王淑莹,彭永臻,等.污水有机碳源特征及温度对反硝化聚磷的影响[J].环境科学学报,2006,26(2):186-192.
[2] Rao Y S, Tyagi R D, Scheible O K, et al. Nitrification,denitrification and phosphorus removal in sequential batch reactors[J]. Bioresource Technology,1997,61(2):151-157.
[3]李亚静,孙力平.常规A2/O工艺和倒置A2/O工艺处理城市污水比较研究[J].环境工程,2015,33(增刊1):967-970.
[4]马军,邱立平.曝气生物滤池及其研究进展[J].环境工程,2002,20(3):7-11.
[5]朱加乐,林燕,王欣泽,等.曝气生物滤池脱氮的研究进展[J].化工进展,2017,36(3):1077-1083.
[6]马娟,彭永臻,王丽,等.温度对反硝化过程的影响以及pH值变化规律[J].中国环境科学,2008,28(11):1004-1008.
[7] Kuba T,Loosdrecht M C M V,Heijnen J J. Phosphorus and nitrogen removal with minimal COD requirement by integration of denitrifying dephosphatation and nitrification in a two-sludge system[J]. Water Research,1996,30(7):1702-1710.
[8]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002.
[9] Sayi-Ucar N,Sarioglu M,Insel G,et al. Long-term study on the impact of temperature on enhanced biological phosphorus and nitrogen removal in membrane bioreactor[J]. Water Research,2015,84:8-17.
[10] Wei X C,Viadero J R,Bhojappa S. Phosphorus removal by acid mine drainage sludge from secondary effluents of municipal wastewater treatment plants[J]. Water Research,2008,42(13):3275-3284.
[11] Hao X D,Heijnen J J,Van Loosdrecht M C. Model-based evaluation of temperature and inflow variations on a partial nitrification-ANAMMOX biofilm process[J]. Water Research,2002,36(19):4839-4849.
[12] Kim J H,Guo X J,Park H S. Comparison study of the effects of temperature and free ammonia concentration on nitrification and nitrite accumulation[J]. Process Biochemistry,2008,43(2):154-160.
[13]张玲,彭党聪,常蝶.温度对聚磷菌活性及基质竞争的影响[J].环境科学,2017,38(6):2429-2434.
[14]王亚宜,王淑莹,彭永臻,等.污水有机碳源特征及温度对反硝化聚磷的影响[J].环境科学学报,2006,26(2):186-192.