Abstract Physico-chemical and bacteriological screening of Hussain Sagar lake: An urban wetland
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Physico-chemical and bacteriological screening of Hussain Sagar lake: An urban wetland

机译：侯赛因萨加尔湖的理化和细菌筛选：城市湿地

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Abstract Hussain Sagar is a man-made lake originally designed for drinking water purpose that receives domestic sewage and industrial effluents through drainage canals due to rapid residential and industrial growth. Also, every year thousands of idols are immersed into the lake during festivals. In this context, a comprehensive study was initiated for monitoring the lake water quality. Various physico-chemical parameters such as temperature, pH, EC, TDS, COD and chlorophyll a were analyzed using APHA standard methods Water was also monitored for heterotrophic bacteria, total coliforms, Escherichia coli and antibiotic resistant bacteria. The average values for heterotrophs were found to be 8.6×104 and 2.8×104 CFU/mL before and after idol immersion, respectively. While the average values for total coliforms and E. coli were 5×104 and 5×102; 1.2×104 and 7.2×101 CFU/mL, for the respective sampling periods. The mean values for ampicillin and gentamicin resistant bacteria were 5.9×103 and 6.9×102; and 2.2×103 and 5.4×102 CFU/mL, respectively. It was found that TDS, COD and chlorophyll a values were decreased after idol immersion due to extensive cleaning. The statistical results showed no correlation between faecal bacteria and physico-chemical parameters and one way-ANOVA indicated statistically significant differences between the mean values of different sampling locations, with respect to COD and E. coli at 95% confidence. However, enormous load of coliforms and E. coli indicated severe contamination of the lake with domestic sewage and human excreta. Thus, the water is not suitable for human consumption/drinking purpose. Notably, incidence of antibiotic resistant bacteria in lake water is a potential threat to both public health and the environment. Thus, regular monitoring and applying appropriate corrective actions are needed to improve the water quality.
机译： 摘要 侯赛因·萨加尔（Hussain Sagar）是一个人造湖，最初是为饮用水而设计的，由于住宅和工业的快速发展，它们通过排水渠接收生活污水和工业废水。此外，每年在节日期间都有数千个偶像沉入湖中。在这种情况下，开始了一项全面的研究以监测湖泊水质。使用APHA标准方法分析温度，pH，EC，TDS，COD和叶绿素a的各种理化参数，还监测水中的异养细菌，总大肠菌，大肠杆菌和抗生素抗性细菌。发现异养菌的平均值为8.6 × 10 4 和2.8 × 10 4 CFU / mL。而大肠菌群和 E的平均值。 coli 是5 × 10 4 和5 × 10 2 ; 1.2 × 10 4 和7.2 × 10 1 CFU / mL，各个采样周期。氨苄青霉素和庆大霉素耐药菌的平均值为5.9 × 10 3 和6.9 × 10 2 ;和2.2 × 10 3 和5.4 × 10 2 CFU / mL ， 分别。发现在偶像浸没后，由于大量清洁，TDS，COD和叶绿素a值降低。统计结果表明，粪便细菌与理化参数之间没有相关性，一种方差分析表明，相对于COD和 E，不同采样位置的平均值之间在统计学上存在显着差异。大肠杆菌，置信度为95％。但是，大肠菌群和 E的负荷很大。大肠杆菌表示该湖已被生活污水和人类排泄物严重污染。因此，水不适合人类食用/饮用。值得注意的是，湖水中抗生素抗性细菌的发生对公共卫生和环境均构成潜在威胁。因此，需要定期监控并采取适当的纠正措施以改善水质。

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