Designing and upgrading wastewater treatment plants requires tools reflecting real plants, constraints, and decisions. AQUA DESIGNER is built from daily engineering practice and follows the real design workflow—from influent load and process selection to aeration, sludge handling, and operating costs. Easy to use even for complex plants, it offers clear forms, guided calculations, and meaningful defaults. It delivers process calculations, equipment dimensioning, energy demand, sludge handling, and full documentation, supporting engineers with fast, reliable comparisons.