A novel sludge minimized biological nitrogen removal process for saline sewage treatment.
A novel sludge minimized biological nitrogen removal process for saline sewage treatment.
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一种新型污泥最小化生物脱氮工艺用于含盐污水处理。
DOI：
10.2166/wst.2009.194
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发表时间：
2009
影响因子：
2.7
通讯作者：
M. van Loosdrecht
中科院分区：
文献类型：
--
作者：
W. L. Tsang;J. Wang;H. Lu;S. Li;G. Chen;M. van Loosdrecht
本研究报告了一种新的生物脱氮工艺，即SANI工艺（硫酸盐还原，自养反硝化和硝化集成工艺）处理含盐污水的实验室规模的评价。实验系统由一个用于硫酸盐还原的升流式厌氧床、一个利用升流式厌氧床中产生的溶解硫化物进行自养反硝化的缺氧过滤器和一个用于硝化的好氧过滤器组成。该系统成功地运行了180多天，总的有机碳去除率为95%，其中，82%的去除率是由上流式厌氧床在HRT为6 h，13%的去除率由缺氧过滤器。平均COD去除率/硫酸盐去除率为0.76 gCOD/gSO（4）或2.28 COD/gSO（4）-S，进一步证实了有机物去除主要通过硫酸盐还原实现。在脱氮效率方面，发现SANI系统对缺氧过滤器和好氧过滤器之间的再循环速率敏感。3Q的再循环率被认为是最佳的，以实现74%的总氮去除。结果表明，自养反硝化作用是SANI系统总氮去除的主要贡献者。硫平衡分析表明，生物量中元素硫的积累和硫化氢的损失都很小。在整个运行期间（至今330天），该系统中的任何反应器都没有浪费污泥。生物量平衡模拟结果进一步证实了硫酸盐还原菌、自养硝化菌和硝化菌的低生物量产量有助于实现剩余污泥零排放。
This study reports a lab-scale evaluation of a new biological nitrogen removal process for saline sewage treatment, namely a SANI process (Sulfate reduction, Autotrophic denitrification and Nitrification Integrated process). The experimental system consisted of an up-flow anaerobic bed for sulfate reduction, an anoxic filter for autotrophic denitrification using dissolved sulfide produced in the up-flow anaerobic bed and an aerobic filter for nitrification. The system successfully operated for more than 180 days with an overall organic carbon removal efficiency of 95%, in which, 82% removal was contributed by the up-flow anaerobic bed operating at a HRT of 6 h, and 13% removal by the anoxic filter. An average COD removed /sulfate removed ratio was found to be 0.76 gCOD/gSO(4) or 2.28 COD/gSO(4)-S further confirming that the organic removal was mainly achieved by the sulfate reduction. In terms of nitrogen removal efficiency, the SANI system was found sensitive to the recirculation rate between the anoxic filter and the aerobic filter. A recirculation rate of 3Q was found to be optimal for achieving 74% of the total nitrogen removal. It was confirmed that the autotrophic denitrification was a major contributor to the total nitrogen removal in the SANI system. Sulfur balance analysis indicated that both the accumulation of elementary sulfur in the biomass and the loss of hydrogen sulfide were trivial. During the entire operation period (330 days to date), no sludge was wasted from any reactors in this system. This was further confirmed by the biomass balance simulation results that low biomass yields of sulfate reducing bacteria, autotrophic denitrifiers and nitrifiers contribute to the zero excess sludge discharge.