MO Water/Wastewater Operator case studies
MO Water/Wastewater Operator · Put your knowledge to work in context.
The Missouri Drinking Water and Wastewater Operator Certification is administered by the Missouri Department of Natural Resources (MoDNR), which describes its operator certification program as "Training and information for drinking water and wastewater system operators." The credential is intended for people who operate or intend to operate drinking water treatment and distribution systems and wastewater treatment and collection systems in Missouri. This independent study page organizes preparation around four domains: Drinking Water Treatment, Drinking Water Distribution, Wastewater Treatment, and Wastewater Collection. The MO Water/Wastewater Operator case studies are 4 cases and about 2,184 words.
1Filter Run Turbidity Creep After Coagulant Change
A 6 MGD conventional surface-water plant treats a reservoir source that has just turned over, raising raw turbidity from 4 NTU to 22 NTU and dropping raw alkalinity to 38 mg/L as CaCO3. The operator switches from alum to ferric chloride to improve settling, keeping the same 25 mg/L dose and the same target finished turbidity of 0.10 NTU.
520 words, about 3 min2Distribution System Pressure Drop and Discolored Water After Main Repair
A crew repairs a 12-inch cast iron main break on a dead-end loop serving about 40 homes and a small school. The repair takes nine hours.
565 words, about 3 min3Activated Sludge Bulking and Effluent TSS Excursion
A 2.5 MGD activated sludge plant with a conventional aeration basin and secondary clarifiers is running an SVI of 280 mL/g. The mixed liquor suspended solids are 2,200 mg/L, and the return activated sludge rate is 0.5 times influent flow.
555 words, about 3 min4I/I Spike and SSO at a Low-Lying Manhole
A combined collection area of about 15,000 feet of 8- to 15-inch gravity sewer serves 900 connections and discharges to a lift station. During a two-inch rain in three hours, the lift station wet well rises from its normal 4-foot level to within six inches of the high-level alarm.
544 words, about 3 min