Lesson 1Primary treatment: role of primary clarifiers, other solids capture methods, and when to skip primary treatmentThis lesson explains primary treatment's job in catching solids and cutting loads, covering clarifier design, fast capture options, downstream effects, and when skipping it makes sense.
Primary clarifier hydraulics and sizingSolids and BOD removal performance targetsHigh-rate primary and fine screening optionsEffect of primary treatment on BNR designCriteria for omitting primary treatmentLesson 2Secondary clarification and solids management: secondary clarifier types, overflow rates, sludge return and wasting plansThis lesson covers secondary clarifiers' roles, design specs, and running tips, including types, overflow and solids rates, sludge blanket control, return/waste strategies, and fixing solids loss.
Secondary clarifier types and componentsSurface overflow and solids loading ratesSludge blanket monitoring and controlRAS and WAS flow setting strategiesDiagnosing bulking and clarifier failuresLesson 3Sludge treatment options: thickening, aerobic/anaerobic stabilisation, digestion, dewatering, and disposal or reuse thoughtsThis lesson outlines sludge chains like thickening, stabilisation, digestion, dewatering, and end disposal or reuse, stressing mass balance, energy gain, and rules on smells.
Sludge production estimates and characterizationThickening technologies and design rangesAerobic and anaerobic stabilization choicesDigestion, biogas use, and energy recoveryDewatering, disposal, and reuse pathwaysLesson 4Compact and small-space setups: MBBR, SBR, ready systems, and mixes with choice adviceThis lesson looks at space-saving biological setups like MBBR, SBR, package plants, and blends, focusing on land use, power, flexibility, building ease, and picks for tight sites.
Design principles of MBBR reactorsSBR cycle design and control strategiesPackaged plant components and limitationsHybrid MBBR–activated sludge applicationsConfiguration selection for constrained sitesLesson 5Secondary biological processes: comparing activated sludge (CAS), extended aeration, A2/O, MLE, MBBR, SBR, and trickling filters for compact, power-saving plantsThis lesson compares main secondary biology processes—CAS, extended aeration, A2/O, MLE, MBBR, SBR, trickling filters—noting speeds, power, space, nutrient removal, and fit for efficient small plants.
Conventional activated sludge design factorsExtended aeration for small robust plantsA2/O and MLE for biological nutrient removalMBBR and SBR for flexible compact systemsTrickling filters and combined biofilm systemsLesson 6Nutrient removal plans: biological nitrogen removal (nitrification-denitrification) ideas, phosphorus options (chemical dosing, enhanced biological phosphorus removal)This lesson presents biology and chemical nutrient removal, covering nitrogen paths, setups, phosphorus dosing, EBPR basics, and controls for steady work.
Nitrification and denitrification fundamentalsMain BNR process configurations and layoutsCarbon source needs and internal recycle controlChemical phosphorus precipitation design basicsEnhanced biological phosphorus removal conceptsLesson 7Pretreatment choices and selection criteria: coarse/fine screening, grit removal, flow measurement and balancing reasonsThis lesson details pretreatment aims and options like coarse/fine screens, grit removal, flow checks, and balancing, explaining sizes, layouts, and protection for later units.
Coarse and fine screening design choicesGrit chamber types and sizing criteriaFlow measurement devices and sitingEqualization basin purposes and designPretreatment selection for varying influentLesson 8Disinfection choices: chlorine, UV, peracetic acid—key factors, CT idea, leftover control and safetyThis lesson reviews disinfection aims and options like chlorine, UV, peracetic acid, explaining CT, dosing, leftovers, safety, by-products, and picks based on effluent and rules.
Disinfection objectives and log removal targetsChlorination systems, CT, and residual controlUV reactor design and dose monitoringPeracetic acid mechanisms and applicationsSafety, by-products, and technology selection
