Lesson 1Primary treatment: job of primary clarifiers, other solids capture ways, and when to skip primary treatmentThis lesson explains primary treatment's role in catching solids and cutting loads, covering clarifier design, high-rate options, downstream effects, and when skipping is okay.
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 handling: secondary clarifier types, overflow rates, sludge return and waste plansThis lesson covers secondary clarifier jobs, design specs, and running plans. Includes types, overflow and solids rates, sludge blanket control, RAS/WAS plans, 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 basic options: thickening, aerobic/anaerobic stabilisation, digestion, dewatering, and disposal or reuse thoughtsThis lesson outlines sludge treatment chains, including thickening, stabilisation, digestion, dewatering, disposal or reuse. Stresses mass balance, energy gain, rules, and smell limits.
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, package systems, and mixed solutions with choice guidesThis lesson looks at compact biological setups like MBBR, SBR, package plants, hybrids, focusing on space, energy, flexibility, building ease, and picks for small or 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 small, energy-saving plantsThis lesson compares main secondary biological processes—CAS, extended aeration, A2/O, MLE, MBBR, SBR, trickling filters—noting kinetics, energy, space, nutrient removal, and fit for compact 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 ways: biological nitrogen removal (nitrification-denitrification) ideas, phosphorus options (chemical precipitation, enhanced biological phosphorus removal)This lesson covers biological and chemical nutrient removal, nitrification–denitrification paths, setups, phosphorus precipitation, EBPR basics, and key 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 7Pre-treatment options and choice criteria: coarse/fine screening, grit removal, flow measurement and equalisation reasonsThis lesson details pre-treatment goals and options like coarse/fine screening, grit removal, flow measurement, equalisation. Covers sizing, layout, protection of downstream, reliability boost.
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—choice factors, CT idea, residual control and safety thoughtsThis lesson reviews disinfection goals and options like chlorine, UV, peracetic acid. Covers CT, dose–response, residual control, safety, by-products, 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
