Lesson 1Primary treatment: job of primary clarifiers, other solids catch ways, and when to skip primary treatmentThis part explains primary treatment's job in catching solids and cutting loads, covering primary clarifier design, other fast-catch options, effects on later units, and when skipping primary 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 management: secondary clarifier designs, overflow rates, sludge return and wasting waysThis part covers secondary clarifier jobs, design numbers, and running ways. Topics include clarifier types, surface overflow and solids load rates, sludge blanket control, RAS/WAS ways, and fixing solids loss issues.
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 stabilising, digestion, dewatering, and final disposal or reuse thoughtsThis part outlines sludge treatment lines, including thickening, aerobic and anaerobic stabilising, digestion, dewatering, and final disposal or reuse. It stresses mass balance, energy recovery, and rule 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, packaged systems, and mixed solutions with pick guidanceThis part looks at compact biological setups like MBBR, SBR, packaged plants, and mixes, focusing on space, energy use, flexibility, build ease, and pick rules for small or tight-space facilities.
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, energy-saving plantsThis part compares key secondary biological processes—CAS, extended aeration, A2/O, MLE, MBBR, SBR, and trickling filters—noting speeds, energy use, space, nutrient removal ability, and fit for compact, efficient 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 removal options (chemical precip, enhanced biological phosphorus removal)This part shares biological and chemical ways for nutrient removal, covering nitrification–denitrification paths, process setups, phosphorus precip, EBPR design basics, and key control numbers 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 pick rules: coarse/fine screening, grit removal, flow measure and equalising reasonsThis part details pre-treatment aims and options, including coarse and fine screening, grit removal, flow measure, and equalising. It explains sizing, layout, and how pre-treatment guards later units and boosts reliability.
Coarse and fine screening design choicesGrit chamber types and sizing criteriaFlow measurement devices and sitingEqualization basin purposes and designPretreatment selection for varying influentLesson 8Disinfection options: chlorine, UV, peracetic acid—pick drivers, CT idea, leftover control and safety thoughtsThis part reviews disinfection aims and options, including chlorine, UV, and peracetic acid. It explains CT ideas, dose–response, leftover control, safety, by-product worries, and picks based on effluent quality 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
