Lesson 1Primary treatment: role of primary clarifiers, alternative solids capture strategies, and when primary treatment can be omittedExplains first treatment for solids catch and load cut, covering settler plans, other fast catch ways, down-line effects, and when skipping first 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 strategiesCovers second settler jobs, plan numbers, work ways. Includes types, top spill and solids load rates, sludge layer watch, return/waste 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 conceptual options: thickening, aerobic/anaerobic stabilization, digestion, dewatering, and final disposal or reuse considerationsOutlines sludge lines with thick, air/no-air steady, digest, dry, end dump or reuse. Stresses weight balance, energy get, rules, 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 low-footprint configurations: MBBR, SBR, packaged systems, and hybrid solutions with selection guidanceLooks at small bio setups like MBBR, SBR, ready plants, mixes, on space, power, bend, build ease, picks for tiny or tight spots.
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 plantsCompares main second bio steps—CAS, long air, A2/O, MLE, MBBR, SBR, drip filters—noting speeds, power, space, food remove, fit for small, power-save 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)Shows bio and chem food remove ways, air-to-no-air paths, setups, P drop, EBPR basics, main watch 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 7Pretreatment options and selection criteria: coarse/fine screening, grit removal, flow measurement and equalization rationaleDetails pre-clean aims and picks, coarse/fine screens, grit take, flow measure, equal. Sizes, lays, protects down units, boosts steady.
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 considerationsReviews germ-kill aims and picks, chlorine, UV, peracid. CT ideas, dose-kill, leftover watch, safe, side-products, pick by out-strength, 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
