Resources
Case Studies & Blog
Results from real activated sludge plants, plus practical guides from the Maji process team.
Maji newsletter
New case studies, activated sludge guides, microorganisms and calculators for wastewater professionals.
Algae and Euglena in wastewater
A summer algae and Euglena issue traced to an upstream reservoir, solved through operator-led sampling, testing, and a change in influent source.
Read the case study
Nematodes in activated sludge
Nematodes in activated sludge can indicate mature biomass, long SRT, and possible reactor stress when their abundance rises.
Read the article
Wastewater Process Calculators
Free activated sludge calculators for SRT, F:M, SVI, RAS, and WAS rate. Each includes inputs, the equation, and guidance for wastewater operators & engineers.
Read the article
Case Study: Improving a Long-Term Settling Problem at a ~8 MGD WWTP
SVI improved from 178 to 78 mL/g at a 30,000 m³/day plant. Thiothrix eliminated by reducing RAS recycle from 200% to 92%, avoiding millions in upgrade costs.
Read the case study
18% Reduction in Electricity Consumption: Case Study
18% electricity reduction in activated sludge reactor, saving $4,000/month. Achieved through gradual diffuser adjustments with continuous process monitoring.
Read the case study
Activated Sludge Process Optimization: Case Study
Acre WWTP's 2025 annual report describes how Maji improved biological process control, sludge age optimization, and early trend detection at a ~10 MGD plant.
Read the case study
Wastewater Microorganisms and Filaments Gallery
Maji launched a visual reference library of activated sludge microorganisms - protozoa, filaments, and metazoa - with microscopy images and process context.
Read the article
MBR Performance Improvement: 6.5 MGD Case Study
TTF dropped from 100 to 38 seconds at a 6.5 MGD MBR plant. Maji prevented foaming and filament overgrowth disrupting membrane filtration throughout 2025.
Read the case study
Pilot to Full Deployment: 30 MGD Plant
A 30 MGD plant expanded from pilot to full Maji deployment, with verified gains in energy use, sludge wasting strategy, and early process event detection.
Read the case study
Introducing MAJI AI Process and Biomass Agent
Introducing the Maji AI Process Agent: answers questions based only on your plant's own biomass analysis history. No generic answers — context built over time.
Read the article
Microthrix Foaming in Activated Sludge: Early Detection: Case Study
Early Microthrix detection enabled targeted action — reduced sludge age, paused FOG input. Result: 8 months without foaming at an activated sludge plant.
Read the case study
Case Study: Inorganic Particles in Activated Sludge
Maji detected inorganic particles up to 700 µm inside activated sludge, identifying a physical - not biological - cause of settling and floc structure problems.
Read the case study
Bristle Worms in Activated Sludge
Bristle worms in activated sludge: what they indicate about sludge age and F:M ratio, when a few is normal, and when their dominance signals a process red flag.
Read the article
Filament Index & SVI in Activated Sludge
When SVI stays stable but filament index spikes, it's an early warning. A 6 MGD plant case showing how Maji detected rising Nocardia before foam appeared.
Read the article
Case Study: S.natans Filaments & Bulking Prevention - Maji Early Warning
Maji detected rising S. natans filaments early at a 6.5 MGD plant. A targeted DO increase and brief scavenger waste pause prevented filamentous bulking.
Read the case study
Rotifers in Activated Sludge
Rotifers in activated sludge: what they indicate about sludge age and process maturity, and when their dominance or shelled state signals a process warning.
Read the article
Stalked Ciliates in Activated Sludge
What stalked ciliates tell you about activated sludge process maturity, sludge age, and stress - including the difference between single and colonial types.
Read the article
35-44 °C (95-111 °F) for ~1 week in a row
How extreme heat (35–44°C) affected activated sludge biology: low DO, Spirillum and Thiothrix dominance, and how Maji helped plants respond and stabilize.
Read the articleMaji newsletter
Case studies, activated sludge guides and tools for wastewater professionals
Practical activated sludge content from the Maji process team.
For your plant
See how Maji works with your own data
A short demo with the Maji process team. Bring your questions about implementation, pricing, or how it fits your operations.