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!

___________________________________ 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:

___________________________________ (Credit Card Number)

___________________________________ (Expiration Date)

Kevin Lee, Pia Prohaska, and Larry Li (Article 1: CEU = 0.1 WW02015379)

1. Compared to the adjacent 6-mil-gal-per-day (mgd) activated sludge process on the same site, the integrated fixed film activated sludge (IFAS) process train a. requires 33 percent less installed horsepower. b. removes 75 percent as much total nitrogen. c. provides equally stable and efficient ammonia removal throughout the year. d. has a 55 percent smaller footprint.

2. The primary purpose of the plant’s initial anaerobic zone is a. nitrification. b. denitrification. c. biological phosphorus removal. d. gas production.

3. The dissolve oxygen control in the IFAS zone is based on _____________ measurements taken in the polishing reactor. a. dissolved oxygen b. nitrate c. phosphorous d. ammonium

4. Solids inventory within the IFAS basins is increased by up to 100 percent by the addition of a. stainless steel media. b. a carbon source. c. plastic media. d. return activated sludge.

5. Which of the following is not listed as a low-maintenance feature of this facility? a. Magnetic drive centrifugal blowers b. Conical mixers c. Pretreatment screens d. Clarifier launder covers 34 January 2021 • Florida Water Resources Journal

Victoria Reuvers and Mahsa Mehrdad (Article 2: CEU = 0.1 WW02015380)

1. Throughout the trial, the average nitrate and nitrite (NOx)-N

Tank No. 5 effluent concentration was ____ mg/l. a. 6.7 b. 10 c. 20.2 d. 22

2. In July, the dissolved oxygen concentration in Aeration Tank No. 6 dropped to 1.5 mg/l, limiting a. ammonia oxidation. b. denitrification. c. phosphate reduction. d. nitrate reduction.

3. In the operational control strategy, the __________ algorithm adjusts process conditions to changes in influent conditions. a. return activated sludge (RAS) b. blower control c. feedforward d. feedback

4. The MicroC® 2000 product replaced _____________ as a carbon source. a. carbon dioxide b. carbonic acid c. methanol d. ethanol

5. Study results conclude that internal recycle pumps should be sized to achieve up to ____ percent of average plant flow to maximize nitrate recycling. a. 100 b. 200 c. 300 d. 400