SC Water/Wastewater Operator case studies
SC Water/Wastewater Operator · Put your knowledge to work in context.
South Carolina's water and wastewater operator certification is a state credential that authorizes a person to serve as the responsible operator of a public drinking water treatment, drinking water distribution, wastewater treatment, or wastewater collection system. The state environmental agency (SCDES, formerly DHEC) issues certificates at several class levels, typically A through D, and each class carries its own experience and training requirements that must be documented before you sit for the exam. The SC Water/Wastewater Operator case studies are 5 cases and about 3,930 words.
1Storm Turbidity Spike at a Low-Alkalinity Surface Water Plant
A 6 MGD conventional surface-water plant draws from a river intake. A two-day storm raises raw turbidity from 5 to 190 NTU and color from 10 to 70 CU.
802 words, about 4 min2Storage Tank Turnover, Residual Loss, and Coliform Positives
A 1.4 MGD average-day water system has one 1.0 MG elevated tank with 42 ft of usable height (about 24,000 gal per foot) and a single fixed-speed 1,200 gpm high-service pump. Night demand is about 0.6 MGD.
780 words, about 4 min3Bulking Sludge When Wasting Rates Look Normal
A 2.2 MGD activated-sludge plant has two 0.45 MG aeration basins (0.90 MG total), MLSS 2,600 mg/L, and WAS of 0.022 MG/day at 5,800 mg/L. Influent BOD is 240 mg/L.
762 words, about 4 min4DBP Compliance Headroom and the Chloramine Decision
A 3.2 MGD surface-water plant uses free chlorine only, with finished-water pH 8.1, finished TOC 4.6 mg/L (raw 5.2), and long detention: about 5.5 days average in August from clearwell through a 2.0 MG standpipe and the transmission mains. Free chlorine leaving the plant is 0.9 mg/L.
777 words, about 4 min5Confined Space Entry at a Wet Well with a Rising H2S Reading
a two-person crew responds to a clogged 24-inch gravity sewer at a 14-ft-deep wet well. Odor complaints have been coming in for a week.
809 words, about 4 min