摘要
衰减系数是表征微生物增长的重要动力学参数,与所处环境密切相关。采用基质利用速率测定方法,以厌氧氨氧化工艺中最常见的厌氧氨氧化菌(Candidatus Brocadia)为对象,探讨了其在缺氧(NO2--N、NO3--N)及厌氧环境下的衰减系数。结果表明:基质利用速率测定方法可有效避免由于其他细菌的衰减而引起的实验误差;缺氧(NO2--N、NO3--N)及厌氧环境下厌氧氨氧化菌的衰减系数依次为0.035 2 d^-1、0.025 7 d^-1和0.051 2 d^-1,相比于其他自养菌,厌氧氨氧化菌的衰减系数较小。在进行污泥保存时,维持NO3--N的缺氧环境有利于厌氧氨氧化菌活性和数量的保存。
As an important parameter to characterize the growth of microorganism, decay coefficient is closely related to the environment conditions. In this study, the decay coefficient of the most common anammox bacteria(Candidatus Brocadia) was analyzed by substrate utilization rate determination method under anoxic( NO2--N, NO3--N) and anaerobic conditions. The results showed that substrate utilization rate determination method could effectively avoid the experimental errors caused by the decay of other bacteria. The decay coefficients of anammox bacteria under anoxic(NO2--N, NO3--N) and anaerobic conditions were 0.035 2, 0.025 7 and 0.051 2 d^-1, respectively. Compared with other autotrophic bacteria, it was observed that decay coefficient of anammox bacteria was smaller. An anoxic condition of NO3--N was favorable to the preservation of activity and quantity of anammox bacteria during sludge storage.
作者
姬倩
彭党聪
赵文钊
JI Qian;PENG Dangcong;ZHAO Wenzhao(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Laboratory of Northwest Water Resources,Environment and Ecology,Ministry of Education,Xi'an 710055,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2019年第12期3012-3018,共7页
Chinese Journal of Environmental Engineering
基金
陕西省住房城乡科技开发项目(2015-K65).
关键词
厌氧氨氧化
衰减系数
缺氧环境
厌氧环境
anammox
decay coefficient
anoxic condition
anaerobic condition
作者简介
第一作者:姬倩(1994—),女,硕士研究生。研究方向:污水处理理论与技术。E-mail:jiqian@xauat.edu.cn;通信作者:彭党聪(1957—),男,硕士,教授。研究方向:污水处理理论与技术。E-mail:dcpeng@xauat.edu.cn
