Milorganite

Milorganite is a biosolids product produced by the Milwaukee Metropolitan Sewerage District. The name is a portmanteau of the words "Milwaukee Organic Nitrogen". It is one of the oldest branded fertilizers in the United States and is composed of heat-dried microbes that have digested the organic matter in wastewater.

History

Milorganite was first produced in 1926 by the Milwaukee Sewerage Commission, the predecessor to the Milwaukee Metropolitan Sewerage District. The production of Milorganite is part of the wastewater treatment process at the Jones Island Water Reclamation Facility in Milwaukee, Wisconsin. The facility treats wastewater from the greater Milwaukee area, and the resulting biosolids are heat-dried and pelletized to create Milorganite.

Production

The production of Milorganite involves the treatment of wastewater through a process known as activated sludge. This process involves the use of microorganisms to break down organic matter in the wastewater. The resulting sludge is then heat-dried and pelletized to create the final product. The heat-drying process kills any pathogens in the sludge, making it safe for use as a fertilizer.

Use

Milorganite is primarily used as a slow-release nitrogen fertilizer. It is also high in iron, making it beneficial for promoting green, healthy growth in plants. Milorganite can be used on lawns, gardens, and other green spaces. It is also used in golf courses and other large-scale landscaping projects.

Environmental Impact

The use of Milorganite as a fertilizer has both positive and negative environmental impacts. On the positive side, it recycles nutrients from wastewater that would otherwise be wasted. However, there are concerns about the potential for heavy metals and other contaminants in the product, as it is derived from wastewater.

See Also

• Biosolids
• Fertilizer
• Wastewater treatment
• Activated sludge

References

Milorganite Resources
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