Mathematics Manual for Water and Wastewater Treatment Plant OperatorsA comprehensive, selfcontained mathematics reference, The Mathematics Manual for Water and Wastewater Treatment Plant Operators will be useful to operators of all levels of expertise and experience. The text is divided into three parts. Part 1 covers basic math, Part 2 covers applied math concepts, and Part 3 presents a comprehensive workbook with more than 1700 sample problems highlighting the kinds of exam questions operators can expect to see on state licensure examinations. Readers working through the book systematically will acquire a definitive understanding of and skill in performing the applied water/wastewater calculations that are essential for a successful career. 
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Mathematics Manual for Water and Wastewater Treatment Plant Operators Frank R. Spellman No preview available  2004 
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acid aeration tank alkalinity alum average backwash basin biosolids BOD concentration BOD removed brake horsepower calcium hypochlorite calculate chemical feeder chlorine chlorine dose chlorine residual circuit copper sulfate cubic feet detention determine dosage efﬁciency Example ﬁlter run ﬂow rate ft long ft wide ft x gal/ft3 gallons gallons of water gallons per day gallons per minute gpd/sq ft horsepower hydraulic loading rate hypochlorite inches inﬂuent Key Point lb/d lb/day lime mg/L as CaCO3 mg/L x mgL MGD lbgal milliliters min/d MLSS MLVSS operation organic loading overﬂow rate percent strength phenolphthalein plant polymer polymer solution pond pounds primary clariﬁer primary efﬂuent ﬂow Problem pumping rate receives a ﬂow Referring to Equation resistor rotating biological contactor sample settleable solids sludge ﬂow sodium hypochlorite Solution Referring suspended solids concentration thickener treatment trickling ﬁlter volume wastewater weighs 8.34 lb/gal weight weir
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Page 14  Multiplying or dividing both terms of a fraction by the same number does not change the value of the fraction.
Page 21  If the last figure dropped is 5 or more, increase the last retained figure by 1. If the last digit dropped is less than 5, do not increase the last retained figure.
Page 5  A common factor, or common divisor, of two or more numbers is a factor that will exactly divide each of them. If this factor is the largest factor possible, it is called the greatest common divisor. Thus...