摘要
基于分别运行倒置/常规A2/O工艺的试验系统,研究不同碳源类型条件下两系统微生物群落代谢活性的差异。实验结果表明,不论在何种进水碳源类型条件下,倒置A2/O工艺系统微生物基于Biolog所计算的AWCD(平均色度)值均高于常规A2/O工艺,分别提高15.22%和9.16%,倒置A2/O工艺微生物对碳源的代谢能力以及其代谢活性均高于常规A2/O工艺;进水中挥发性脂肪酸所占比例对工艺微生物群落代谢活性有着显著影响,该比例从60%提高到100%时,倒置A2/O系统和常规A2/O系统AWCD平均值分别提高39%和32%,说明挥发性脂肪酸所占比例越高,对应的微生物群落代谢活性越强;不同工艺的微生物群落结构对进水条件变化的适应程度不同,倒置A2/O工艺系统和常规A2/O工艺系统中的显阳性碳源种类分别减少了2种和4种,说明倒置A2/O工艺系统微生物在进水条件变化时群落结构变化的程度小于常规A2/O工艺。
The metabolic activity of the microbial communities was mainly studied between inverted and conventional A2/O processes under two different carbon sources. Experimental results showed that regardless of the types of carbon sources, the increase rate（15.22%） of average well color development（AWCD） in the inverted A2/O process system was higher than that（9.16%） in the conventional A2/O process based on Biolog calculation. The metabolic activity for carbon in the inverted A2/O process was also higher than that in the conventional A2/O process. The proportion of volatile fatty acids in the inflow water had a significant impact on the metabolic activity of the microbial communities.When the proportion of volatile fatty acids increased from 60% to 100%, the AWCD value in the inverted A2/O process and in the conventional A2/O process increased to 39% and 32%, respectively. This study showed that the higher proportion of volatile fatty acids in the system, the stronger the metabolic activity of the microbial communities. The community structure of microorganisms in different treatment processes depended on their adaptability to the change of inflow water conditions. The number of carbon positive microorganisms reduced by 2species in the inverted A2/O process and by 4 species in the conventional A2/O process, indicating that the impact of the inverted A2/O process on the community structure of microorganisms was less than that in the conventional A2/O process when changes occurred in the inflow water condition.
出处
《城市环境与城市生态》
CAS
2014年第4期22-26,共5页
Urban Environment & Urban Ecology
基金
山东省中青年科学家奖励基金(BS2009SW019)
