论文部分内容阅读
黄浦江水中有机污染日益加剧,上海自来水中微菌落杂菌的出现频率亦日益增多。据上海自来水公司的不完全统计,早在1963年时,便发现自来水中有此类杂菌存在;1970年8月杨树浦水厂管网水中微菌落杂菌的出现率竟达30％;1974年以后几乎每年出现。此类杂菌的出现时间均在6～8月份,正是上海霉雨季节的末尾。此时,黄浦江水呈黑色,发臭,游离氨达2.0毫克/升以上,溶解氧几乎没有,污染指数均在5.0以上,而出厂水的总余氯为3.5～4.5毫克/升时,管网水中仍有此类杂菌存在。
Organic pollution in the Huangpu River is increasing, and the frequency of micro-bacterial bacteria in tap water in Shanghai is also increasing. According to the incomplete statistics of the Shanghai Water Company, as early as 1963, the presence of such bacteria in tap water was found; in August 1970, the frequency of micro-cactaceous bacteria in the water pipe network of Yangshupu Water Plant reached 30%; 1974. Almost every year thereafter. The emergence time of these bacteria is from June to August, which is the end of the mildew season in Shanghai. At this time, the Huangpu River water is black, stinking, free ammonia up to 2.0 mg/l or more, almost no dissolved oxygen, pollution index above 5.0, and the total residual chlorine in the factory water is 3.5 to 4.5 mg/l. There are still such bacteria in the net water.