NV Water/Wastewater Operator case studies
NV Water/Wastewater Operator · Put your knowledge to work in context.
Nevada Drinking Water Operator Certification and Nevada Wastewater Treatment Operator Certification are the two operator credentialing tracks administered by the Nevada Division of Environmental Protection (NDEP) through its Operator Certification program. NDEP maintains separate Drinking Water and Wastewater operator certification pages, plus an Operators Forum, a Training/Upcoming Events page, and the publication Water Lines. The credential is for people who operate or supervise public drinking water systems or wastewater treatment and collection facilities in Nevada, and for candidates preparing to move into those roles. Because the two tracks are administered separately, a candidate should confirm the requirements for the specific track and grade before applying. The NV Water/Wastewater Operator case studies are 5 cases and about 2,786 words.
1Dead-End Chlorine Residual Versus TTHM Headroom
A 9,000-connection distribution system serves a desert community north of Las Vegas. The system uses free chlorine and has a 0.8 MG welded-steel elevated tank on a 12-inch transmission main.
615 words, about 3 min2Filter 3 Turbidity Rise With Lower Headloss
A 6 MGD conventional surface-water plant treats a reservoir supply: raw turbidity 2.5 NTU, alkalinity 60 mg/L, pH 7.8. After a thunderstorm, raw turbidity rises to 22 NTU and alkalinity drops to 45 mg/L.
560 words, about 3 min3Filamentous Bulking in an Oxidation Ditch
An oxidation ditch plant has a permitted flow of 2.0 MGD and receives 1.6 MGD with influent BOD5 210 mg/L, TSS 230 mg/L, and grease from a restaurant district. MLSS is 4,200 mg/L, SVI is 310 mL/g, and the clarifier sludge blanket is 4 feet above the floor with a 9-foot sidewater depth.
525 words, about 3 min4Storm-Driven SSO at a Lift Station and Low-Point Manhole
A collection system serves 18,000 people. A 12-inch vitrified clay gravity interceptor runs 1.2 miles to a two-pump lift station with 75-hp pumps.
543 words, about 3 min5Nitrification in a Chloraminated Distribution Zone
A 3.5 MGD distribution system uses chloramines. The treatment plant feeds chlorine and ammonia at a 4.5:1 Cl2:N weight ratio, targeting 0.9 mg/L total chlorine.
543 words, about 3 min