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SEWAGE AND WASTEWATER TREATMENT Ammonia is a major issue for the treatment of municipal wastewater. Ammonia levels in municipal wastewaters can be reduced to 10-15 ppm through traditional primary and secondary treatment facilities. Final circulation in the tertiary treatment stage is accomplished with polishing filters containing clinoptilolite, a popular form of natural zeolite. The zeolites lower the level of ammonium to non-toxic, acceptable levels. The zeolite beds can be regenerated and recycled indefinitely. Significant properties include: • High cation exchange capacity The size of zeolite used in wastewater polishing filter columns varies according to the design. A size specification of -20 to +35 Tyler mesh is typical for this application. |
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