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 Energy Efficiency and Environmental Stewardship. 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!

SUBSCRIBER NAME (please print)

Article 1 ____________________________________

LICENSE NUMBER for Which CEUs Should Be Awarded

Article 2 ____________________________________

LICENSE NUMBER for Which CEUs Should Be Awarded

If paying by credit card, fax to (561) 625-4858 providing the following information:

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.

(Credit Card Number)

(Expiration Date)

Evaluation of Mixing, Mass Transfer, Operation and Maintenance, Energy, and Material Requirements for Hydrogen Sulfide Oxidation at the Orlando Utilities Commission Water Treatment Plants

Srikanth S. Pathapati, Chris Schulz, John Healy, Brad Jewell, Eric Jones, Robert Sumpter Quyen Newell, and Thomas Steinke (Article 1: CEU = 0.1 DW/DS02015398)

1. The _______________, also known as the concentration variance, is used to evaluate the stability of ozone residual. a. correlation coefficient b. Ryznar index c. coefficient of variation d. Saturation index

2. The highest operating and maintenance cost associated with fine bubble diffuser systems is a. gasket replacement cost. b. diffuser decalcification. c. energy cost. d. contactor nozzle inspection.

3. ___________ monitoring assists the operator in evaluating the level of hydrogen sulfide oxidation that is occurring. a. Oxygen b. Threshold odor c. Oxygen reduction potential (ORP) d. Sulfate

4. _____________ demonstrate the significant increase in mixing energy when the plants were upgraded from fine bubble diffusion to sidestream injection. a. Reactor volumes b. Reaction times c. Ozone residual measurements d. Velocity gradients

5. Which of the following does not enhance ozone gas to water transfer? a. Venturi b. Deeper water column c. Nozzles d. Greater overall tank volume

Sea Change: Desalination and the Water–Energy Nexus

Scott Moore (Article 2: CEU = 0.1 DW/DS02015399)

1. Of the top 10 desalinated water producing countries, the

United States ranks a. first. b. third. c. fifth. d. tenth.

2. ____________ membranes mimic cellular membranes by selectively filtering out salt and other undesired substances. a. Selector b. Spiral wound c. Biometric d. Cellulose acetate

3. Pretreatment, energy recovery, and other techniques can push the energy efficiency of reverse osmosis (RO) to _____ percent under ideal conditions. a. 60 b. 68 c. 74 d. 80

4. Which of the following is typically the least-cost item for RO treatment? a. Filters and membranes b. Chemicals c. Capital d. Maintenance

5. Globally, desalination plants are estimated to be responsible for a. 80 percent of potable water production. b. extensive loss of habitat due to brine waste discharge. c. 76 million tons of carbon dioxide emission annually. d. 50 percent of fresh water conserved over the past decade.