田纳西州士麦那镇的水处理厂经历了几次挑战 与处理J.Percy Prist水库的水有关，包括 在湖泊季节性变化期间，水质持续下降。在这些 营业额、硫化氢、二氧化碳、铁，尤其是锰含量升高 事实证明，这对电厂操作员来说是有问题的。对于水库中固有的硬度和藻类含量升高，还有更多的抱怨。除了 由于这些问题，该工厂面临着与微生物相关的更严格的法规/ 消毒副产品规则（M/DBP）。 为了提供一种有效可靠的方法来缓解目前在 该厂在满足新的饮用水标准后，该镇考虑添加石灰软化剂 并对处理厂单元工艺进行微滤。进行了中试规模的可治疗性研究 在2007年7月30日至10月12日期间执行，以证明这些单元的能力 改善城镇水质的流程。可治疗性研究的结果表明 石灰软化和微滤可以改善铁、锰、铁的去除， 水处理厂现有单元工艺的硬度和浊度。测试 还表明，拟议的单元工艺可以维持对这些问题的处理 与当前工艺不同，在机械故障期间，污染物会持续较长时间。 最后，测试表明，固体贮存池中的倾析液可以返回到池中 用于回收的处理工艺，将工厂的用水效率提高到 超过99%。包括表格、数字。

The Town of Smyrna, Tennessee Water Treatment Plant experienced several challenges associated with treating water from the J. Percy Priest Reservoir, including extended periods of diminished water quality during seasonal turnovers in the lake. During these turnovers, elevated levels of hydrogen sulfide, carbon dioxide, iron and especially manganese have proven problematic for the plant operators. There have been additional complaints about the elevated hardness and algae levels inherent in the reservoir. In addition to these issues, the plant faces more stringent regulations associated with the Microbial/ Disinfection Byproduct Rules (M/DBP). In order to provide an effective and reliable means of alleviating the current issues experienced at the plant and meet the new drinking water standards, the Town considered adding lime softening and microfiltration to the treatment plant unit processes. A pilot scale treatability study was performed between July 30 and October 12, 2007 to demonstrate the ability of these unit processes to improve water quality for the town. The results of the treatability study indicate that lime softening and microfiltration can provide improved removal of iron, manganese, hardness and turbidity over the existing unit processes at the water treatment plant. The testing also demonstrated that the proposed unit processes could sustain treatment for these contaminants for extended periods of time during mechanical failures, unlike the current process. Finally, the testing indicated that decant from a solids holding pond could be returned to the treatment process for reclamation, improving the water usage efficiency of the plant to levels in excess of 99%. Includes tables, figures.