Ozonation effect on natural organic matter adsorption and biodegradation--application to a membrane bioreactor containing activated carbon for drinking water production.
Ozonation effect on natural organic matter adsorption and biodegradation--application to a membrane bioreactor containing activated carbon for drinking water production.
复制标题
DOI：
10.1016/j.watres.2009.10.023
复制
发表时间：
2010-02
期刊：
影响因子：
12.8
通讯作者：
R. Treguer;R. Tatin;A. Couvert;D. Wolbert;A. Tazi-pain
中科院分区：
文献类型：
--
作者：
R. Treguer;R. Tatin;A. Couvert;D. Wolbert;A. Tazi-pain
更严格的关于溶解有机物(DOM)的立法敦促饮用水行业改善DOM的去除，特别是在应用于高溶解有机碳(DOC)含量和低浊度的水时。为了改进目前饮用水处理厂(DWTP)中使用的常规工艺，在雷恩的DWTP中对含有流态化活性碳的复合膜生物反应器的性能进行了研究。初步结果表明，残留的DOC是不可生物降解组分的主要部分。为了提高整体效率，在该工艺中增加了上游氧化步骤。臭氧被选择来破坏大分子并增加它们的生物降解性。第一步包括进行实验室规模的实验，以便通过测量过程中可生物降解的溶解有机碳(BDOC)的产量来优化必要的臭氧剂量。其次，对臭氧氧化水中DOC的活性碳吸附进行了定量研究。整个过程是在雷恩(法国)的DWTP的现场条件下在试点装置中进行测试的。实验室实验证实，臭氧氧化增加了BDOC的含量，降低了DOC的芳香性，并生成了小尺寸的有机化合物。吸附试验表明，活性碳出人意料地首先去除了BDOC。最后，中试单位的结果显示，从所考虑的原水中，BDOC对溶解有机碳的额外去除(从0.10到0.15mgL−1)。
More stringent legislation on dissolved organic matter (DOM) urges the drinking water industry to improve in DOM removal, especially when applied to water with high dissolved organic carbon (DOC) contents and low turbidity. To improve conventional processes currently used in drinking water treatment plants (DWTPs), the performances of a hybrid membrane bioreactor containing fluidised activated carbon were investigated at the DWTP of Rennes. Preliminary results showed that the residual DOC was the major part of the non-biodegradable fraction. In order to increase the global efficiency, an upstream oxidation step was added to the process. Ozone was chosen to break large molecules and increase their biodegradability. The first step consisted of carrying out lab-scale experiments in order to optimise the necessary ozone dose by measuring the process yield, in terms of biodegradable dissolved organic carbon (BDOC). Secondly, activated carbon adsorption of the DOC present in ozonated water was quantified. The whole process was tested in a pilot unit under field conditions at the DWTP of Rennes (France). Lab-scale experiments confirmed that ozonation increases the BDOC fraction, reduces the aromaticity of the DOC and produces small size organic compounds. Adsorption tests led to the conclusion that activated carbon unexpectedly removes BDOC first. Finally, the pilot unit results revealed an additional BDOC removal (from 0.10 to 0.15mgL−1) of dissolved organic carbon from the raw water considered.