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True or false: Hydrogen sulfide is a major component of digester gas. Over five days the DO concentration in the BOD blank can change by no more than how many […]

What are the lower and upper explosion limits of methane mixed with air? If CO2, carbon dioxide, is not flammable, not explosive, not toxic, how can it kill you? Two […]

Simply stated, what are the three steps in writing an essay? What is the conversion factor used by WWTT to get from gal to Mgal and Mgal to gal? What […]

ft.lb/min is a unit of power. What two units of power are far more commonly used in water and wastewater treatment plant operations? What three components are added together to […]

I ask wastewater treatment plant operators all the time what they think their jobs are. Invariably I get the answer, “To meet effluent permit.” Even when I was starting out […]

Keith Boger, founder of WasteWater Technology Trainers (WWTT), offered a class on anaerobic digestion. We finally got around to updating Keith’s material and, last week, we had our first class […]

M∙mg/L: used to cancel mg, L and M (in Mgal) in pounds and pounds/day calculations Mgal/106 gal: used to insert M into the pounds and pounds/day calculations when volume or […]

I am sitting here between my grapefruit tree and new raised-bed garden, built this spring and filled with compost I made, now teaming with tomatoes, fava beans, and corn all […]

Keith Boger founded WasteWater Technology Trainers (WWTT). Keith originally worked as a chemist for the City of San Diego and then as the Director for the State of California’s Water […]

As operators, we consider ourselves professionals, as well we should. Although a slight exaggeration, I believe a wastewater treatment plant (WWTP) operator protects more lives in a day than a […]