The Challenge A West coast waste water facility had to regularly shut down its pumps due to clogging when pumping Activated Sludge. Under normal circumstances, there is a chance for a “clog” or “slug” to impact flow when pumping sludge to the respective digesters. If this occurs, the nominal operating pressure (20psig) can spike and when 80psig is reached, the facility must switch off their pump. Over the years of operating with a Mer

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