MT Water/Wastewater Operator case studies
MT Water/Wastewater Operator · Put your knowledge to work in context.
The Water and Wastewater Operator Certification is administered within the Montana Department of Environmental Quality (DEQ) as part of its Water programs, and the department lists it under the Water section of its website alongside Drinking Water, Engineering Infrastructure & Subdivisions, Lakes, Streams & Wetlands, and Source Water Protection. The credential is intended for people who operate or seek to operate public drinking water treatment and distribution systems and wastewater treatment and collection systems in Montana, where certified operators are a standard requirement for responsible charge of these facilities. The MT Water/Wastewater Operator case studies are 5 cases and about 4,335 words.
1Filter Effluent Climbing After a Runoff Event
A 12 MGD conventional surface-water plant treats a river source through coagulation, flocculation, sedimentation, and four dual-media filters. At 06:00 raw turbidity is 4 NTU and alum is fed at 28 mg/L.
944 words, about 5 min2Chloramine Residual Collapse on a Dead-End Street
A 6.2 MGD distribution system buys finished water and applies chloramines at the entry point with a chlorine-to-ammonia-nitrogen weight ratio of 4.5 to 1. Over three weeks the picture has shifted.
635 words, about 3 min3Sludge Blanket Rising and Ammonia Breaking Through
A 4.0 MGD extended-aeration plant has two aeration basins totaling 2.0 MG, four secondary clarifiers with 10 ft side-water depth, and effluent limits of 25 mg/L CBOD5, 30 mg/L TSS, and 8 mg/L ammonia from April through October. Over the last ten days: flow 3.6 MGD, influent CBOD5 240 mg/L, MLSS has fallen from 3,200 to 2,100 mg/L, SVI has risen from 140 to 340 mL/g, and clarifier sludge blankets stand at 7.5 ft.
925 words, about 5 min4Friday Night Overflow to a Creek Tributary
At 21:40 on a Friday a homeowner reports sewage surfacing in a backyard. The crew finds sewage escaping from a manhole at roughly 40 gpm into a grass swale that runs 600 ft to a creek; the creek is a quarter mile downstream of the swale's outfall.
890 words, about 4 min5Pressure to Enter a Sewer Manhole
A three-person crew arrives at a 48-inch-diameter, 10-ft-deep manhole on a 15-inch sanitary sewer to clear a grease blockage. Sewage is standing 4 ft below the rim and the upstream manhole is surcharging.
941 words, about 5 min