PID controller
Activated sludge
Control theory (sociology)
Controller (irrigation)
Settling
Process control
Settling time
Process (computing)
Sewage treatment
Substrate (aquarium)
Computer science
Process engineering
Dilution
Work (physics)
Control engineering
Environmental science
Control (management)
Engineering
Temperature control
Environmental engineering
Step response
Physics
Mechanical engineering
Artificial intelligence
Operating system
Oceanography
Biology
Agronomy
Thermodynamics
Geology
