This research paper tries to identify and address issues related to efficiency of sewage treatment plants (STPs) and their implications on the Dal Lake ecosystem in Srinagar city, Kashmir, India. Fluidized aerobic bioreactor (FAB) and sequential batch reactor (SBR) technologies having been recently installed along the periphery of Dal Lake were evaluated for efficiency for a continuous period of 24 months from December 2016 to November 2018. Apart from chemical quality, total coliform (TC), fecal coliform (FC), and fecal streptococci (FS) analyses were also carried out. Major highlights of our work using one-way ANOVA (analysis of variance) revealed significant variations (p < 0.05) in total suspended solids (TSS), biochemical oxygen demand (BOD), chemical oxygen demand (COD), ammonia (NH₃-N), total phosphorus (TP), TC, FC, and FS. Our findings indicate that both technologies are struggling for removal efficiency, which is very low, especially in FAB during three to four months of winter season where a very high drop in the working efficiency of the STP was observed. The treatment facilities did not meet the prescribed standards in respect of TSS, BOD, NH₃-N, TP, TC, FC, and FS thereby having the potential to compromise public health and trophic status of Dal Lake.

本研究报告试图确定和解决与污水处理厂（STP）的效率有关的问题，以及它们对印度克什米尔斯利那加市Dal Lake生态系统的影响。从2016年12月到2018年11月，连续24个月对达尔湖周边最近安装的流化好氧生物反应器（FAB）和顺序分批反应器（SBR）技术进行了评估。除化学质量外，总大肠菌群（ TC），粪大肠菌群（FC）和粪便链球菌（FS）也进行了分析。我们使用单向方差分析（方差分析）的工作的主要亮点是，总悬浮固体（TSS），生化需氧量（BOD），化学需氧量（COD），氨（NH ₃）发生了显着变化（p <0.05）-N），总磷（TP），TC，FC和FS。我们的发现表明，这两种技术都在为去除效率而苦苦挣扎，因为去除效率非常低，尤其是在冬季三到四个月的FAB中，STP的工作效率大大降低了。这些处理设施不符合有关TSS，BOD，NH ₃ -N，TP，TC，FC和FS的规定标准，因此有可能损害Dal Lake的公共卫生和营养状况。