July 2021

Columns

Reliability: Thinking outside of the box

In late 1989, the Milwaukee Metropolitan Sewage District asked the author to present a three-day equipment maintenance course at one of its large effluent treatment facilities.

Bloch, Heinz P., Hydrocarbon Processing Staff

In late 1989, the Milwaukee Metropolitan Sewage District asked the author to present a three-day equipment maintenance course at one of its large effluent treatment facilities. Situated on Jones Island, the treatment plant makes a pelletized fertilizer byproduct, which we choose to call “Millfort.” The fertilizer is still sold today by several major-brand hardware stores for about $28 per 32-lb bag. Among the raw material that flows into a sewage treatment plant is industrial waste, including fluids from a world-scale beer brewery. Contaminated water byproduct greatly exceeds the final beverages produced by breweries. However, this byproduct is a high-value, nitrogen-rich, slow-release fert

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