Operators: Take the CEU Challenge! Members of the Florida Water and Pollution Control Operators Association (FWPCOA) may earn continuing education units through the CEU Challenge! Answer the questions published on this page, based on the technical articles in this month’s issue. Circle the letter of each correct answer. There is only one correct answer to each question! Answer 80 percent of the questions on any article correctly to earn 0.1 CEU for your license. Retests are available. This month’s editorial theme is Water Treatment. Look above each set of questions to see if it is for water operators (DW), distribution system operators ( DS), or wastewater operators (WW). Mail the completed page (or a photocopy) to: Florida Environmental Professionals Training, P.O. Box 33119, Palm Beach Gardens, Fla. 33420-3119. Enclose $15 for each set of questions you choose to answer (make checks payable to FWPCOA). You MUST be an FWPCOA member before you can submit your answers!
EARN CEUS BY ANSWERING QUESTIONS FROM PREVIOUS JOURNAL ISSUES! Contact FWPCOA at membership@fwpcoa.org or at 561-840-0340. Articles from past issues can be viewed on the Journal website, www.fwrj.com.
Operation and Maintenance Comparative Assessment of Colocated Nanofiltration, Lime Softening, and Low-Pressure Reverse Osmosis Systems at the Norwood Water Treatment Plant Veronica Llaneza, Jafeth Baez, Samual Zamacona, Cristina Ortega-Castineiras, Moises Sierra Ortiz, and Carlos Carrazana (Article 1: CEU = 0.1DS/DW02015374) 1. For what purpose is carbon dioxide added in the Norwood treatment process? a. Restore alkalinity after membrane treatment b. Assist in degasification c. pH adjustment in lime treatment process d. A ssist in hydrogen sulfide reduction 2. Which of the facility’s treatment processes had the lowest normalized chemical expense? a. Lime softening b. Nanofiltration c. Reverse osmosis d. Combined lime softening and reverse osmosis 3. City records reveal that personnel utilization costs ____ percent more for the lime system than for the membrane system. a. 5 b. 10 c. 15 d. 20 4. The study has revealed the opportunity for optimization of __________ utilization to reduce membrane system operation cost. a. calcium hydroxide b. sulfuric acid c. carbon dioxide d. antiscalant 5. Higher membrane system electrical costs are attributed, in part, to which of the following? a. More porous membranes b. Need for a climate controlled operating environment c. Higher pump operating speeds d. H igher discharge heads for membrane supply wells
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Lime Softening–the Forgotten Technology: Optimization Case Studies From South Florida
The Role of Corrosion Indices in Establishing Effective Corrosion Control Treatment
Tyler Smith Semago, Vinnie Hart, Jennifer Stokke Nyfennegger, and Juan Guevarez (Article 2: CEU = 0.1DS/DW02015375)
Christopher P. Hill (Article 3: CEU = 0.1DS/DW02015376)
1. The lime softening process raises pH high enough to convert bicarbonate to a) carbon dioxide. b) calcium. c) carbonate. d) the U.S. Environmental Protection Agency. 2. The target solids inventory for most solids contact clarifiers is ___ percent. a) 3 to 5 b) 6 to 12 c) 13 to 15 d) 20 3. The American Water Works Association (AWWA) recommends that no more than ____ mg/l of hardness be removed across the filters. a) 5 b) 10 c) 15 d) 20 4. Which of the following is not listed as an important factor in the lime slaking process? a) Temperature b) Time c) Percent calcium d) Particle size 5. Decoupling the lime softening process from _______________ allows better targeting of finished water hardness. a) color removal b) stabilization c) pH optimization for disinfection d) turbidity reduction
16 November 2020 • Florida Water Resources Journal
1. Which of the following original U.S. Environmental Protection Agency (EPA) Lead and Copper Rule treatment guideline alternatives was subsequently removed from the approved EPA list? a) Carbonate precipitation b) Zinc passivation c) Corrosion inhibitor addition d) pH and alkalinity adjustment 2. ______________ is not a factor in determining dissolved inorganic carbon concentration. a) Ionic strength b) Temperature c) Alkalinity d) Hardness 3. The control method for pitting corrosion is a) p H and dissolved inorganic carbonate (DIC) control. b) carbonate passivation. c) reduce water age. d) orthophosphate inhibitor addition. 4. Which of the following is truly a corrosion index? a) Ryznar Stability Index b) Larson-Skold Index c) Calcium carbonate precipitation potential d) Langelier Saturation Index 5. F orthcoming revisions to the Lead and Copper Rule include a new standard identified as a) action level. b) maximum contaminant level. c) maximum recommended contaminant goal. d) threshold level.
