净水器微生物污染状况调查及影响因素分析

目的调查净水器在实际使用中微生物污染状况,分析造成净水器出水微生物超标的可能影响因素。方法对2012年2-3月上海地区28户净水器使用家庭的自来水及净水器过滤水进行采样,并填写调查表。结果 71.4%的过滤水中异养菌总数超过同一住处自来水中细菌数量,53.6%净水器出水微生物数量超标;使用活性炭滤芯与净水器过滤水中异养菌数量超标具有相关性。结论在实际使用过程中,微生物在净水器内形成生物膜或生长繁殖,建议定期更换滤芯或采用其他消毒和除菌措施以减少饮用水的细菌污染。

Impact factors for microbiological contamination of water purifier

OBJECTIVE To investigate the condition of the microbiological contamination of water purifiers during routine use,and to analyze the factors that may lead to the microbiological exceeding standard of filtered water.METHODS From Feb to Mar 2012,the running water and the filtered water were sampled from 28 families using household purifiers,the questionnaires were filled out.RESULTS Of 71.4% of the filtered water,the total bacterial counts of the heterotrophic bacteria wese more than those of the running water from the same place,53.6% of the filtered water exceeded the bacterial count standard;the use of activated carbon filter in water purifiers was related to the exceeding standard of heterotrophic bacteria counts in the filtered water.CONCLUSION Biofilm formation and bacterial growth in water purifier exist during the routine use.It is recommended to regularly replace the filters or consider other antibacterial and sterilization measures to diminish the chance of microbiological contamination of drinking water.