Lesson 1Primary treatment: job of primary settling tanks, other solids catch methods, and when to skip primary treatmentThis part explains primary treatment's job in solids catch and load cut, covering settling tank design, other fast-catch choices, downstream effects, and when skipping primary is right.
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 settling and solids handling: secondary settling tank designs, overflow rates, sludge return and removal plansThis part covers secondary settling tank jobs, design measures, and running plans. Includes tank types, surface overflow and solids load rates, sludge layer control, 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 basic choices: thickening, air/anaerobic stabilising, digestion, drying, and final disposal or reuse thoughtsThis part outlines sludge treatment chains, including thickening, air and anaerobic stabilising, digestion, drying, and 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, ready systems, and mixed solutions with choice adviceThis part looks at compact biology setups like MBBR, SBR, ready plants, and mixes, focusing on space, energy, flexibility, building ease, and choice rules for small or tight-space sites.
Design principles of MBBR reactorsSBR cycle design and control strategiesPackaged plant components and limitationsHybrid MBBR–activated sludge applicationsConfiguration selection for constrained sitesLesson 5Secondary biology processes: side-by-side look at activated sludge (CAS), long aeration, A2/O, MLE, MBBR, SBR, and drip filters for compact, energy-saving plantsThis part compares main secondary biology processes—CAS, long aeration, A2/O, MLE, MBBR, SBR, drip filters—noting speeds, energy, space, nutrient removal skill, and fit for compact, saving 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: biology nitrogen removal (nitrifying-denitrifying) ideas, phosphorus removal choices (chemical settling, boosted biology phosphorus removal)This part shows biology and chemical plans for nutrient removal, covering nitrifying–denitrifying paths, setups, phosphorus settling, EBPR design basics, and main control measures 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 choices and selection rules: coarse/fine screening, grit removal, flow measure and balancing reasonsThis part details pre-treatment aims and choices, including coarse and fine screening, grit removal, flow measure, and balancing. Explains sizing, layout, and protection of downstream units and better reliability.
Coarse and fine screening design choicesGrit chamber types and sizing criteriaFlow measurement devices and sitingEqualization basin purposes and designPretreatment selection for varying influentLesson 8Germ-killing choices: chlorine, UV, peracetic acid—choice drivers, CT idea, leftover control and safety thoughtsThis part reviews germ-killing aims and choices, including chlorine, UV, peracetic acid. Explains CT ideas, dose–response, leftover control, safety, side-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
