印第安纳州美国自来水公司面临两个挑战:扩大科科莫区设施的处理能力以满足预计需求，以及从井水供应中经济地去除铁、锰和砷。对常规澄清、氧化过滤和接触吸附澄清混合介质过滤进行了比较，以评估它们提供可接受的成品水质的能力，并确定最佳性能所需的预处理。在去除铁、锰和砷方面，中试研究的结果与小型澄清研究的结果进行了比较，并证明接触吸附澄清器- 与传统设计的工厂相比，混合介质工艺可以在更高的澄清率下达到所需的水质。

The Indiana-American Water Company is faced with two challenges: to expand the treatment capacity of its Kokomo District facility to meet projected demand, and to economically remove iron, manganese and arsenic from its well water supply. Conventional clarification, oxidation-filtration and contact adsorption clarification-mixed media filtration were compared to evaluate their ability to provide an acceptable finished water quality, as well as to determine what pretreatment would be required for optimum performance. The results of the pilot study compared favorably with those of the bench-scale clarification studies in terms of iron, manganese and arsenic removal and demonstrated that the contact adsorption clarifier - mixed media process could achieve the desired water quality at higher clarification rates than a conventionally-designed plant.