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目的了解青岛市直饮水水质微生物的污染情况,为安全用水提供依据,为直饮水的卫生管理提供基础资料。方法按照《生活饮用水检验规范》、《生活饮用水标准检验方法_微生物指标》(GB/T5750-2006)进行检验;依据国家标准进行鉴定蜡样芽胞杆菌和铜绿假单胞菌。数据采用χ2检验。结果直饮水的合格率为55.79%。2004-2008年度菌落总数的合格率为50.24%,总大肠菌群的合格率为85.99%;2009-2011年度菌落总数的合格率为61.11%,总大肠菌群的合格率为93.98%。两个年度阶段的菌落总数合格率有显著性差异(χ2=5.06,P<0.05),总大肠菌群合格率有显著性差异(χ2=7.55,P<0.01)。在现场试验中,二次供水的合格率为85.00%,直饮水的合格率为32.50%;直饮水中检出铜绿假单胞菌和蜡样芽胞杆菌两种条件致病菌。直饮水主动检测的合格率为30.39%,送样检测的合格率为63.86%。结论直饮水的合格率虽有所提高,但其微生物的污染仍然比较严重,提醒各有关部门应对各种净水机进行严格管理,确保用水安全。
Objective To understand the pollution of drinking water microbes in Qingdao City and provide the basis for safe water use, providing basic information for the sanitary management of drinking water. Methods According to “Drinking water test specification” and “Drinking water standard test method _ Microbial indicators” (GB / T5750-2006) were tested; Bacillus cereus and Pseudomonas aeruginosa were identified according to national standards. Data using χ2 test. Results drinking water pass rate of 55.79%. The total passing rate of colony in 2004-2008 was 50.24%, the total passing rate of coliform bacteria was 85.99%, the passing rate of total colony in 2009-2011 was 61.11%, and the passing rate of total coliform was 93.98%. There was a significant difference in the total number of colonies between the two years (χ2 = 5.06, P <0.05). The total coliform passing rate was significantly different (χ2 = 7.55, P <0.01). In the field test, the pass rate of secondary water supply was 85.00%, the pass rate of direct drinking water was 32.50%; two pathogenic bacteria of Pseudomonas aeruginosa and Bacillus cereus were detected in direct drinking water. The pass rate of active drinking water testing was 30.39%, and the passing rate of sample testing was 63.86%. Conclusion Although the passing rate of direct drinking water has been raised, its microbial contamination is still relatively serious, reminding all relevant departments to strictly control various water purifiers to ensure water safety.