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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第3期    总第247期    2015年3月

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文章编号:1672-7207(2015)03-1153-07
污泥发酵耦合反硝化系统亚硝态氮积累特性
操沈彬,王淑莹,吴程程,杜睿,龚灵潇,彭永臻

(北京工业大学 北京市水质科学与水环境恢复工程重点实验室,
北京市污水脱氮除磷处理与过程控制工程技术研究中心,北京,100124
)

摘 要: 接种污泥发酵耦合反硝化系统污泥,以剩余污泥发酵上清液中有机物作为反硝化过程电子供体,通过批次试验研究碳氮比( )及pH对反硝化过程 积累的影响。试验结果表明:在初始 为30 mg/L, 为1~3时, 积累量和积累速率随 增加明显升高,继续提高 对 积累影响很小,在反应过程中最大积累量达到(18.85±1.13) mg/L;pH对反硝化过程 积累有明显影响,pH=7时 积累速率最大,而 积累量按pH顺序依次为:pH=9,6,8,7。另外,本试验考察的污泥发酵耦合反硝化系统污泥在反硝化过程中亚硝态氮积累率(wNAR)维持在78%~95%范围内,并且反应初始 对其影响很小,可能是由于该系统的长期碳源电子供体有限,反硝化和发酵条件的引入导致反硝化菌合成硝态氮还原酶能力远远大于亚硝态氮还原酶的还原酶能力。

 

关键字: 污泥发酵耦合反硝化;剩余污泥发酵液;亚硝态氮积累

Nitrite accumulation in sludge fermentation coupling with denitrification system
CAO Shenbin, WANG Shuying, WU Chengcheng, DU Rui, GONG Lingxiao, PENG Yongzhen

Engineering Research Center of Beijing, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

Abstract:With the inoculation sludge derived from a sludge fermentation coupling with denitrification system, bath experiments were conducted to investigate the effect of the ratio of chemical oxygen demand to mass concentration of and pH on nitrite accumulation by denitrification using wasted sludge fermentation liquid as electron donor. The results show that, at the initial nitrate concentration of 30 mg/L, both the amount and rate of nitrite accumulation significantly increase when the initial changes from 1 to 3, and is less influenced by a further increasement of , and the maximum amount of nitrite accumulation is (18.85±1.13) mg/L in the denitrification. pH has a significant effect on nitrite accumulation. The system of pH=7 shows the highest nitrite accumulation rate. However, the maximum nitrite accumulation amount is in the system of pH=9, followed by pH=6, 8 and 7. In addition, the nitrite accumulation ratio (wNAR) maintains 78%-95% during the denitrifying process and is hardly affected by the initial , which may be due to the culture of chronically insufficient carbon source for denitrification and fermentation conditions introduce in the sludge fermentation coupling with denitrification system, which results in a greater ability of synthetizing the nitrate reductase than the nitrite reductase of denitrifiers.

 

Key words: sludge fermentation coupling with denitrification; waste activated sludge fermentation liquid; nitrite accumulation

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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