高层建筑二次供水水质卫生学调查与分析

Water quality hygiene investigation and analysis of secondary supply water in high-rise building

目的调查上饶市高层建筑二次供水水质卫生学情况,掌握二次供水系统的运行管理现状和主要存在的问题,及早发现安全隐患,为二次供水的水处理提供科学指导和技术支持。方法以2014年1月-2015年1月高层建筑二次供水为主要监测对象,同时以上饶市自来水公司水源水检测结果作参照。检测分析按照现行《生活饮用水标准检验方法》（GB5750-2006）规定执行;水质分析结果按照《生活饮用水卫生标准》（GB5749-2006）及有关规定进行评价。二次供水的设施和处理要求应按照GB17051执行。结果夏秋季（丰水期）和冬春季（枯水期）的二次供水水样菌落总数都明显高出同期一般水网水样的菌落总数（P〈0.05）。夏秋季（丰水期）高层建筑二次供水水样的余氯含量明显低于冬春季（枯水期）（P〈0.05）。同时,夏秋季（丰水期）和冬春季（枯水期）高层建筑二次供水水样的余氯含量明显低于相同时段一般水网水样的检测结果（P〈0.05）。夏秋季（丰水期）和冬春季（枯水期）二次供水水样的氨氮含量明显高于相同时段一般水网水样的检测结果（P〈0.05）。同时,夏秋季（丰水期）高层建筑二次供水水样的氨氮含量明显高于冬春季（枯水期）检测结果（P〈0.05）。高层建筑二次供水与一般水网水样的感官指标和理化指标差异无统计学意义（P〉0.05）,但两者检测结果的微生物指标差异有统计学意义（P〈0.05）。结论我市高层建筑二次供水水质状况一般,应加强饮水卫生管理,加大饮水卫生技术指导及监督监测力度,以保证二次供水的卫生和安全。

Objective To investigate the hygiene condition of secondary supply water in high-rise building,and master the operation management present situation and main existing problem of secondary water supply system to early detect the security risk to provide scientific guidance and technical support for water treatment of secondary supply water.Methods Secondary supply waterof high-rise building from January 2014 to January 2015 was selected as mainly detection object.At the same time,detection result of source water from Shangraotap water company was selected as control.Detection analysis was analyzed according to Life drinking water standard inspection method（GB5750-2006）;water quality analysis result was valued according to Life drinking water sanitary standar（GB5749-2006） and relevantprovisions to evaluate.Facilities and processing requirements of secondary supply water were carried out by GB17051. Results Water sample total colony number of secondary supply water at summer and autumn（wet season） and winter and spring（dry season） were obvious higher than total colony number of normal potable water sample at the same period（P〈0.05）.Residual chlorine content of secondary supply water sample in high-rise building at summer and autumn（wet season） was obvious lower than winter and spring（dry season）（P〈0.05）.At the same time,residual chlorine content of secondary supply water sample in high-rise building at summer and autumn（wet season） and winter and spring（dry season） was obvious lower than detection result of normal potable water sample at the same period（P〈0.05）.Ammonia nitrogen content of secondary supply water sample at summer and autumn（wet season） and winter and spring（dry season） was obvious higher than detection result of normal potable water sample at the same period（P〈0.05）.At the same time,ammonia nitrogen content of secondary supply water sample in high-rise building at summer and autumn（wet season） was obvious higher than winter and spring（dry season）（P〈0.05）.The sensory index and physical and chemical indicator had no significant difference between high-rise building secondary supply water and normal potable water sample（P〉0.05）,but the microorganism index had statistical significant difference between them（P〈0.05）. Conclusion Secondary supply water quality in high-rise building of our city is general,and sanitation management of water should be strengthen,water health technical guidance and supervision and monitoring force should be increase to ensure the health and safety of secondary supply water.