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 Wastewater 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. 334203119. 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!

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Article 1 ____________________________________

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Article 2 ____________________________________

LICENSE NUMBER for Which CEUs Should Be Awarded

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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.

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A Holistic Approach to Headworks Design: A Case Study of the St. Augustine Wastewater Treatment Plant No. 1 Headworks Rehabilitation

Steve Curmode, Ed Fernbach, Yanni Polematidis, and Chris Cerreta (Article 1: CEU = 0.1 WW02015394)

1. Grit load is known to be greatest during a. low flow. b. cold weather. c. dry weather. d. peak flow.

2. Which of the following was not identified as a contributor to the structural deterioration of the headworks? a. High velocity flow b. High hydrogen sulfide c. Exposure to salt air d. PVC liner failure

3. The grit characterization study revealed that the majority of the grit entering the plant is classified as a. silt. b. fine. c. large. d. gravel.

4. The screen capture ratio is defined as the weight of solids captured on each sieve divided by the total _________________ in the waste stream. a. dissolved solids b. suspended solids c. weight of solids d. volatile

5. The plant’s existing step screen achieves poor capture because a. the pore openings are too small. b. it allows the screenings mat to be disturbed. c. hydraulic overload results in frequent bypass. d. the flow channel is too small.

To Expand or to Intensify? Chattanooga’s Digestion Question

Nicole Stephens, Jeffrey Rose, Stephanie Kopec, Harold Schmidt, and Sudhakar Viswanathan (Article 2: CEU = 0.1 WW02015395)

1. Thermal hydrolysis process requires a temperature of ______ degrees centigrade. a. 160 to 165 b. 180 to 185 c. 190 to 200 d. 200 to 210

2. At this facility, secondary waste activated sludge is stabilized by a. heat processing. b. lime addition. c. vacuum assisted presses. d. aeration.

3. This facility’s secondary treatment process is not expected to effectively handle increased ammonia generated by the recommended process because a. its historic performance indicates that this will be a problem. b. it lacks hydraulic capacity. c. the process is not designed to reduce ammonia. d. ammonia loading is expected to increase by a factor of 20.

4. Which of the following is not listed as a selected process? a. Lower digester operating temperature b. Produces Class A biosolids c. Improved dewaterability d. Increased biogas production

5. Conventional digesters cannot operate at the projected high organic and hydraulic loading rates due to a. excessive cost. b. a heat requirement beyond that which is practical to apply. c. insufficiently viscous sludge. d. ammonia toxicity.