This study investigated the removal of coliform organisms by diatomite filtration, along with the factors that influence coliform removal such as raw water coliform level, filter aid permeability, flow rate, and body feed concentrations. In addition, the use of coated filter aids was investigated, as well as the use of small iron dosages to the raw water, to improve the removal process.
This article is primarily concerned with the mechanical and hydraulic use of diatomite filters themselves, and secondarily with the performance of the filter aids coupled with well‐designed filters. Included in the various aspects of design are hydraulic velocities (both within and without the filters), septum considerations, adequacy of filter cleaning, precoating technique, and principles of continuous slurry feeding.
This article discusses a project to study the application of two types of filtration, slow sand and diatomite filters, for iron removal in Massachusetts. The project was considered successful and two methods for removal of iron from groundwater were developed.
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