论文部分内容阅读
目的调查深圳市水系贾第鞭毛虫和隐孢子虫污染情况,从而为制订我国饮用水原虫卫生标准提供依据。方法采集深圳市3家自来水厂的原水、出厂水以及3家污水处理厂处理后的排出污水,通过对病原虫的抽滤,淘洗,磁分离,染色鉴定,检测其贾第鞭毛虫囊和隐孢子虫卵囊含量。结果深圳市饮用水源及出厂水均未检出贾第鞭毛虫和隐孢子虫,3家污水处理厂中有2家在处理后的污水中检出贾第鞭毛虫和隐孢子虫。结论目前深圳市供水未发现贾第鞭毛虫和隐孢子虫污染,但污水处理厂处理后的水仍可检出致病原虫,表明存在对地面水污染的危险性。
Objective To investigate the contamination of Giardia lamblia and Cryptosporidium parvum in Shenzhen water system, so as to provide the basis for formulating the hygienic standard of drinking protozoa in our country. Methods The raw water, ex-factory water and wastewater discharged from three WWTPs were collected from three waterworks in Shenzhen. The pathogenic bacteria were collected by suction filtration, elutriation, magnetic separation and staining. Cryptosporidium oocysts content. Results None of Giardia and Cryptosporidium were detected in drinking water sources and ex-factory water in Shenzhen. Two of the three sewage treatment plants detected Giardia and Cryptosporidium in the treated wastewater. Conclusion At present, no contamination with Giardia lamblia and Cryptosporidium parvum was found in Shenzhen water supplies, but pathogenic protozoa could still be detected in the treated water of the WWTP, indicating that there is a risk of water pollution on the ground.