长海县大长山岛海水淡化厂工程卫生学评价报告

目的：为评价海水淡化厂水质状况。方法：按GB5750－1985《生活饮用水检验方法》采用反渗透法进行淡化后海水成品水微生物、氯化物及pH检验。结果：淡化后海水氯化物浓度为426mg/L，细菌学指标（细菌总数）检测9次其中3次不合格（分别为350、300、4016个／L），pH值基本合格，其中一次偏酸5．74，一次偏碱8．94。结论：采用该海水淡化系统，其氯化物残留量偏高，接近农村生活饮用水三级标准最高限量，成品水微生物指标和pH值不稳定。

Report on Sanitary Assessment on Finished Water From Seawater Desalination Plant in Dachangshan Island of Changhai County

Objective To assess the sanitary quality of finished water produced by seawater desalination plant.Methods Using reverse osmosis for seawater desalination,the microbiological indexes,the levels of chloride and the pH values of finished water after seawater desalination were determined and then were assessed based on the National Method for Determination of Drinking Water(GB 5750-1985).Results After seawater desalination,the level of fluoride in finished water was 426 mg/L,the total count of bacteria of 3 finished water samples among 9 samples exceeded the standedard(350,300,4016/L),the pH valuer were qualified on the whole,except one lower value of 5.74 and a higher value of 8.94.Conclusicn After the treatment by seawater desalination system,the level of residual chloride in finished water was higher which approached the related highest limit ruled by National Sanitary Standard for Drinking Water,the microbiological indexes and pH values of finished water were unstable.