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阿曼三个不同地区生活污水污泥的特性及替代回用应用建议

Characterization of Domestic Wastewater Sludge in Oman from Three Different Regions and Recommendations for Alternative Reuse Applications.

作者信息

Baawain Mahad S, Al-Jabri Mohsin, Choudri B S

机构信息

1. Center for Environmental Studies and Research (CESAR), Sultan Qaboos University, Muscat , Sultanate of Oman.

2. Sohar Industrial Port Company, Sohar , Sultanate of Oman.

出版信息

Iran J Public Health. 2014 Feb;43(2):168-77.

PMID:26060740
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4450684/
Abstract

BACKGROUND

There are more than 350 wastewater treatment plants distributed across different parts of Oman. Some of them produce large quantities of domestic sewage sludge, particularly this study focused on characterizing domestic sludge of six treatment plants that may contain various pollutants, therefore the proper management of domestic sewage sludge is essential.

METHODS

Samples of domestic sewage sludge were collected for each month over a period of one year in 2010. Samples of retained/recycled activated sludge (RAS) and waste activated sludge (WAS) were analyzed for elec-trical conductivity (EC), potential of hydrogen (pH), cations, anions and volatile content. All tests were conducted according to the Standard Method for the Examination of Water and Wastewater.

RESULTS

Monitoring ofelectrical conductivity, nitrite and nitrate, the presence of chloride, sulfate and phosphate were higher than the other anions, the phosphate was found very high in all domestic STPs. The average obtained values of the cations in both domestic RAS and WAS samples were within the Omani Standards.

CONCLUSION

The study showed the very high concentration of phosphate, it might be worth to further investigate on the sources of phosphate. Cations in both domestic RAS and WAS samples were low and suggest that the domestic sludge can be re used in agriculture. A regular maintenance should be performed to prevent any accumulation of some harmful substances which may affect the sludge quality and the sludge drying beds should be large enough to handle the produced sludge for better management.

摘要

背景

阿曼各地分布着350多个污水处理厂。其中一些产生大量的生活污水污泥，特别是本研究聚焦于对六个可能含有各种污染物的处理厂的生活污泥进行特性分析，因此生活污水污泥的妥善管理至关重要。

方法

2010年，在一年的时间里每月收集生活污水污泥样本。对留存/循环活性污泥（RAS）和废弃活性污泥（WAS）样本进行电导率（EC）、氢离子电位（pH）、阳离子、阴离子和挥发性成分分析。所有测试均按照《水和废水检验标准方法》进行。

结果

电导率、亚硝酸盐和硝酸盐监测显示，氯化物、硫酸盐和磷酸盐的含量高于其他阴离子，在所有生活污水处理厂中磷酸盐含量都非常高。生活RAS和WAS样本中阳离子的平均测量值均在阿曼标准范围内。

结论

研究表明磷酸盐浓度非常高，可能值得进一步研究磷酸盐的来源。生活RAS和WAS样本中的阳离子含量较低，表明生活污泥可用于农业。应定期进行维护，以防止可能影响污泥质量的有害物质积累，并且污泥干燥床应足够大，以处理产生的污泥，以便更好地管理。

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