Lesson 1Primary treatment: role of primary clarifiers, alternative solids capture strategies, and when primary treatment can be skippedThis section explains primary treatment's role in solids capture and load reduction, covering clarifier design, high-rate options, downstream impacts, 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 strategiesThis section covers secondary clarifier roles, design parameters, and operations. Includes types, overflow and solids loading rates, sludge blanket control, RAS/WAS strategies, and fixing solids losses.
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 conceptual options: thickening, aerobic/anaerobic stabilisation, digestion, dewatering, and final disposal or reuse considerationsThis section outlines sludge treatment trains, including thickening, stabilisation, digestion, dewatering, and disposal or reuse. Stresses mass balance, energy recovery, and regulatory and odour constraints.
Sludge production estimates and characterizationThickening technologies and design rangesAerobic and anaerobic stabilization choicesDigestion, biogas use, and energy recoveryDewatering, disposal, and reuse pathwaysLesson 4Compact and low-footprint configurations: MBBR, SBR, packaged systems, and hybrid solutions with selection guidanceThis section looks at compact biological setups like MBBR, SBR, packaged plants, and hybrids, focusing on space, energy, flexibility, buildability, and choice 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: comparative analysis of activated sludge (CAS), extended aeration, A2/O, MLE, MBBR, SBR, and trickling filters for compact, energy-efficient plantsThis section compares key secondary biological processes—CAS, extended aeration, A2/O, MLE, MBBR, SBR, trickling filters—noting kinetics, energy, space, nutrient removal, 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 strategies: biological nitrogen removal (nitrification-denitrification) concepts, phosphorus removal options (chemical precipitation, enhanced biological phosphorus removal)This section presents biological and chemical nutrient removal strategies, covering nitrification–denitrification, configurations, phosphorus precipitation, EBPR basics, and control parameters for steady performance.
Nitrification and denitrification fundamentalsMain BNR process configurations and layoutsCarbon source needs and internal recycle controlChemical phosphorus precipitation design basicsEnhanced biological phosphorus removal conceptsLesson 7Pretreatment options and selection criteria: coarse/fine screening, grit removal, flow measurement and equalisation rationaleThis section details pretreatment goals and options like coarse/fine screening, grit removal, flow measurement, equalisation. Explains sizing, layout, and protection for downstream units and 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—selection drivers, CT concept, residual control and safety considerationsThis section reviews disinfection aims and options like chlorine, UV, peracetic acid. Covers CT concepts, dose–response, residual control, safety, by-products, and choice 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
