摘要
论文采用自然曝气生物滤床工艺处理富营养化水体,研究水力停留时间(HRT)对其净化效能的影响并进行机理方面的探讨。研究结果表明,当HRT为9.6 min时,自然曝气生物滤床对各目标污染物的去除效果最好,TN、NH4+-N、COD及Chl a的去除负荷分别为1.08、1.30、3.36和26.02 g/(m2.d)。随着HRT的减小,异养细菌所占的比例从7.0%增加到98.4%,自养细菌所占的比例从93%下降到1.6%。填料表面的生物膜及菌丝体结构也随着HRT的减小而增多。此外,本文还得出了沸石生物滤床HRT与HLR之间的经验公式,可以为类似滤床的设计和运行提供理论参考。
Through the use of a natural aeration biofilter for the treatment of eutrophic water bodies, the effects of HRT on the remove efficiency of natura! aeration biofilter and relevant remove mechanism were studied. The results showed that a higher removal efficiency of pollutants was found on the HRT of 9.6 min, and the remove loads of TN, NHa＋-N, COD and Chl a were 1.08, 1.30, 3.36 and 26.02 g/m2·d-1, respectively. With the decrease of HRT, the proportion of heterotrophic bacteria increased from 7.0% to 98.4%, but the proportion of autotrophic bacteria decreased from 93.0% to 1.6%. The biofilm and mycelium structure also increased with the decrease of HRT. In addition, an empirical formula between HRT and HLR was also achieved, which could provide theoretical reference for the design and operation of similar biofilter.
出处
《生态科学》
CSCD
北大核心
2013年第2期224-229,共6页
Ecological Science
基金
国家科技支撑计划课题(2012BAJ21B07)
国家科技重大专项课题(2012ZX07206)
