低温下盐度对Anammox脱氮效能及其特性的影响研究
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摘要
利用中心组合设计考察盐度、温度及其交互作用对Anammox脱氮效能及其特性的影响。结果表明,盐度、温度对总氮去除负荷(NRR)影响显著,低温下适量盐度会促进Anammox菌体脱氮;在温度为15℃,盐度为4 g/L条件下,NRR预测值为0.355 kg/(m3·d),NRR预测值是空白组(15℃,无盐度)的2.8倍,NRR试验值为0.340 kg/(m3·d)。低温下低盐度可以强化Anammox颗粒污泥,使其沉降性更好。
The influences of salinity,temperature and their interaction on Anammox denitrification efficiency and its characteristics have been investigated by central composite design. The results show that salinity and temperature have significant influences on total nitrogen removal load(NRR),and moderate salinity at low temperature can facilitate the denitrification of Anammox bacteria. When the temperature is 15 ℃ and salinity 4 g/L,the predicted value of NRR is 0.355 kg/(m3·d),which is 2.8 times of that of the blank group(15 ℃,no salinity). The NRR test value is0.340 kg/(m3·d). Low salinity at low temperature can enhance Anammox granular sludge,which makes its sedimentation better.
The influences of salinity,temperature and their interaction on Anammox denitrification efficiency and its characteristics have been investigated by central composite design. The results show that salinity and temperature have significant influences on total nitrogen removal load(NRR),and moderate salinity at low temperature can facilitate the denitrification of Anammox bacteria. When the temperature is 15 ℃ and salinity 4 g/L,the predicted value of NRR is 0.355 kg/(m3·d),which is 2.8 times of that of the blank group(15 ℃,no salinity). The NRR test value is0.340 kg/(m3·d). Low salinity at low temperature can enhance Anammox granular sludge,which makes its sedimentation better.
引文
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[2]Kartal B,Koleva M,Arsov R,et al. Adaptation of a freshwater anammox population to high salinity wastewater[J]. Journal of Biotechnology,2006,126(4):546-553.
[3]Yuan Yi,Huang Yong,Deng Huiping. Effect of salt on anammox process[J]. Procedia Environmental Sciences,2011,10:2036-2041.
[4]Daverey A,Chei P C,Dutta K,et al. Statistical analysis to evaluate the effects of temperature and p H on anammox activity[J]. International Biodeterioration&Biodegradation,2015,102:89-93.
[5]杨朝晖,徐峥勇,曾光明,等.不同低温驯化策略下的厌氧氨氧化活性[J].中国环境科学,2007,27(3):300-305.
[6]Dapena-Mora A,Vázquez Padín J R,Campos J L,et al. Monitoring the stability of an Anammox reactor under high salinity conditions[J].Biochemical Engineering Journal,2010,51(3):167-171.
[7]金仁村,马春,郑平,等.盐度对Anammox的短期影响研究[J].高校化学工程学报,2013(2):322-329.
[8]刘成良,刘可慧,李天煜,等.盐度对厌氧氨氧化(Anammox)生物脱氮效率的影响研究[J].环境科学学报,2011,31(9):1919-1924.
[9]Ding Z,Bourven I,Guibaud G,et al. Role of extracellular polymeric substances(EPS)production in bioaggregation:Application to wastewater treatment[J]. Applied Microbiology and Biotechnology,2015,99(23):9883-9905.
[10]Yu H Q,Tay J H,Fang H. The roles of calcium in sludge granulation during UASB reactor start-up[J]. Water Research,2001,35(4):1052-1060.
[11]Liu Yu,Xu Hailou,Yang Shufang. Mechanisms and models for anaerobic granulation in upflow anaerobic sludge blanket reactor[J].Water Research,2003,37(3):661-673.
[12]张正哲.重金属离子对厌氧氨氧化颗粒污泥的影响及其修复策略研究[D].杭州:杭州师范大学,2016.
[13]Jin Rencun,Ma Chun,Yu Jinjin. Performance of an Anammox UASB reactor at high load and low ambient temperature[J]. Chemical Engineering Journal,2013,232:17-25.
[14]Ismail S,de La Parra C,Temmink H,et al. Extracellular polymeric substances(EPS)in upflow anaerobic sludge blanket(UASB)reactors operated under high salinity conditions[J]. Water Research,2010,44(6):1909-1917.