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目的了解大连某航空公司飞机二次供水卫生状况,为确保机组人员和旅客用水卫生安全提供依据。方法按照国家颁布的《生活饮用水卫生标准》(GB 5749-2006)和《生活饮用水标准检验方法》(GB/T 5750-2006),对大连某航空公司2013—2015年飞机二次供水的水样进行细菌总数、总大肠菌群、游离性余氯、色度、臭和味、p H值、浑浊度、肉眼可见物共8项指标检测与评价。结果 2013—2015年共检测水样204份,总合格率为67.16%(137/204);2013年二次供水水质合格率较高(83.93%),但随后逐年降低,至2015年仅为50.57%;主要不合格指标为细菌总数、大肠菌群、游离性余氯、p H值,合格率分别为72.06%、99.02%、86.27%、80.88%;供水站末梢水、加水车中转水和飞机末梢水的水质总合格率分别为78.95%、63.79%、51.85%,合格率差异有统计学意义(P<0.05)。结论大连某航空公司飞机二次供水卫生状况存在安全隐患,水质合格率呈下降趋势,应提高水中游离性余氯水平并加强微生物污染控制。
Objective To understand the secondary water supply status of an airlines in Dalian and provide the basis for ensuring the hygiene and safety of the crew and passengers. Methods According to the Standards of Sanitary Standard for Drinking-water (GB 5749-2006) and Standard Test Method for Domestic Drinking-water (GB / T 5750-2006) promulgated by the State, the secondary water supply to an airline of Dalian in 2013-2015 Total bacterial count, total coliforms, free residual chlorine, color, odor and taste, p H value, turbidity and macroscopic were measured and evaluated in water samples. Results A total of 204 water samples were tested from 2013 to 2015, with a total pass rate of 67.16% (137/204). In 2013, the passing rate of secondary water supply was high (83.93%), but then decreased year by year to only 50.57 in 2015 %; The main unqualified indicators were the total number of bacteria, coliform bacteria, free residual chlorine, p H value, pass rate were 72.06%, 99.02%, 86.27%, 80.88%; water supply station peripheral water, water tankers transit water and aircraft The qualified rate of water quality of peripheral water was 78.95%, 63.79% and 51.85%, respectively, with a significant difference in pass rate (P <0.05). Conclusions There is a potential safety hazard in the secondary water supply of an airline in Dalian and the passing rate of water quality shows a downward trend. The residual free chlorine level in water should be increased and microbial contamination control should be strengthened.