Blending Two Sumps: Why the Average Dose Fails Both
Averaging two sump doses ignores a nonlinear absorption curve and how water migrates between gel fractions. Three blending routes that hold a load test.
Alum Sludge From a Water Works: Why It Behaves Nothing Like Wastewater Sludge
A 60 megalitre-a-day treatment works produces about 4.5 tonnes of alum sludge a day at 96 percent moisture, and the contractor who took the disposal contract assumed the granules he used at a sewage works would behave the same way. They did not. At the same 1.5 percent dose the sludge stayed liquid,…
Dewatering Digested Sludge to a 35 Percent Cake: Dose Math Before the Incinerator
At a works serving 180,000 people, the belt press had run at 78 percent cake moisture for two years and the fluidised-bed incinerator kept refusing the feed. The transfer screw plugged twice a week, the bunker drained a brown liquor into the sump, and the autothermal balance only closed with supplem…
