An analysis of the chemical safety of secondary effluent for reuse purposes and the requirement for advanced treatment.
An analysis of the chemical safety of secondary effluent for reuse purposes and the requirement for advanced treatment.
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DOI：
10.1016/j.chemosphere.2013.01.004
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发表时间：
2013-04
期刊：
影响因子：
8.8
通讯作者：
P. Jin;Xin Jin;Xiaochang C. Wang;X. Shi
中科院分区：
文献类型：
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作者：
P. Jin;Xin Jin;Xiaochang C. Wang;X. Shi
本文对二次出水的化学安全性和深度处理的要求进行了研究。对常规化学品、有害金属、痕量有机物和内分泌干扰物(EDCs)进行了水质分析。总体来说，二级出水的浊度、COD、BOD、TN、TP均能达到我国城市杂用水回用标准，但色度偏高是个问题。如果将水再用于景观和环境目的，特别是与娱乐有关的目的，可能仍需要进一步去除BOD和TP。此外，有害金属、痕量有机物和内分泌干扰物(EDCs)也不是中水回用的主要问题。同时，对几种三级处理工艺进行了评价。混凝-过滤工艺是进一步改善常规水质项目和去除有害金属的有效工艺，但对溶解有机物的处理效果较差。超滤技术能几乎完全去除混浊物质，但去除溶解物质的能力有限。臭氧-生物过滤对色度和有机物的去除效果最好，但对残留的有害金属几乎没有去除作用。因此，针对不同的水质选择合适的工艺对用水具有重要意义。
This paper presents a study on the chemical safety of the secondary effluent for reuse purposes and the requirement of advanced treatment. Water quality analysis was conducted regarding conventional chemical items, hazardous metals, trace organics and endocrine disrupting chemicals (EDCs). Generally speaking, the turbidity, COD, BOD, TN and TP of the secondary effluent can meet the Chinese standards for urban miscellaneous water reuse but higher colour is a problem. Further removal of BOD and TP may still be required if the water is reused for landscape and environmental purposes especially relating to recreation. In addition, Hazardous metals, trace organics and endocrine disrupting chemicals (EDCs) are not the main problems for water reuse. At the same time, several tertiary treatment processes were evaluated. The coagulation–filtration process is effective process for further improvement of the conventional water quality items and removal of hazardous metals but less effective in dealing with dissolved organic matter. The ultrafiltration (UF) can achieve almost complete removal of turbid matter while its ability to remove dissolved substances is limited. The ozone–biofiltration is the most effective for colour and organic removal but it can hardly remove the residual hazardous metals. Therefore, the selection of suitable process for different water quality is important for water use.