Lesson 1Primary treatment: job of primary clarifiers, other solids catch methods, and when to skip primary treatmentThis part explains primary treatment's job in catching solids and cutting loads, covering clarifier design, other fast-catch options, effects on later units, 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 part covers secondary clarifier jobs, design numbers, and running plans. Includes types, surface overflow and solids load 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 stabilising, digestion, dewatering, and final disposal or reuse thoughtsThis part outlines sludge treatment lines, including thickening, aerobic and anaerobic stabilising, digestion, dewatering, and end disposal or reuse. Stresses mass balance, energy gain, 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, package systems, and mixed solutions with choice guidesThis part looks at small biological setups like MBBR, SBR, package plants, and mixes, focusing on space, energy, flexibility, build ease, and choice rules 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 part compares main secondary biological processes—CAS, extended aeration, A2/O, MLE, MBBR, SBR, trickling filters—noting speeds, energy, space, nutrient removal, and fit for small, 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 plans: biological nitrogen removal (nitrification-denitrification) ideas, phosphorus removal choices (chemical precip, enhanced biological phosphorus removal)This part gives biological and chemical plans for nutrient removal, covering nit-denit paths, setups, phosphorus precip, EBPR basics, and main 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 choice rules: coarse/fine screening, grit removal, flow measure and equalising reasonsThis part details pre-treatment aims and options, like coarse and fine screening, grit removal, flow measure, equalising. Explains sizes, layout, and how it 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 choices: chlorine, UV, peracetic acid—choice reasons, CT idea, leftover control and safety thoughtsThis part reviews disinfection aims and options, like chlorine, UV, peracetic acid. Explains CT ideas, dose-response, leftover control, safety, by-products, and choice by 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
