NM Water/Wastewater Operator case studies
NM Water/Wastewater Operator · Put your knowledge to work in context.
The New Mexico Water/Wastewater Operator Certification Exam is the credentialing pathway for people who operate public drinking water systems and wastewater facilities in New Mexico. Certification is administered through the state environmental regulatory structure, and the New Mexico Environment Department (NMED) is the agency that regulates drinking water, wastewater, and related utility programs. The NM Water/Wastewater Operator case studies are 5 cases and about 4,520 words.
1Filter Breakthrough After a Storm
A 4.0 MGD conventional surface-water plant - alum coagulation, flocculation, sedimentation, four dual-media filters - serves a mountain community. A thunderstorm drops 1.8 inches in two hours.
856 words, about 4 min2Chloramine Decay and Coliform Hits at a Dead End
A 1.8 MGD groundwater system disinfects with chloramines (Cl2:NH3-N ratio about 3.5:1) and feeds a 12-mile distribution grid with two dead-end branches and a 2.0 MG welded-steel storage tank. Summer water temperature is 24 °C.
835 words, about 4 min3Rising Sludge Blanket in a Low-Load Activated Sludge Plant
A 1.5 MGD extended-aeration activated-sludge plant (aeration volume 0.50 MG) treats municipal wastewater with a seasonal load from food-service dischargers. Design influent BOD is 200 mg/L; current MLSS is 4,000 mg/L and DO in the aeration basin holds at 1.2 mg/L.
871 words, about 4 min4Lift Station Losing the Race Against Storm Inflow
A duplex submersible lift station (each pump rated 350 gpm at the existing head; both together 700 gpm) serves a basin that now receives storm inflow from a newly paved commercial lot. Normal dry-weather inflow is 250 gpm and the pumps cycle about every 12 minutes.
984 words, about 5 min5Arsenic Compliance When Demand Outgrows the Blend
A city blends two wells to meet demand. Well 1 produces up to 400 gpm with arsenic at 0.014 mg/L; Well 2 produces up to 250 gpm with arsenic at 0.003 mg/L.
974 words, about 5 min