1. PH NEUTRALIZATION
PROCESS
BY :
ANKUR MAHAJAN
M.E. I&C (REGULAR)
ROLL NO. 112505
2. PH NEUTRALIZATION PROCESS
pH neutralization process contain both non-
linearities and changing process dynamics.
The non linearities are due to the fact that the
output of the pH sensor is proportional to the
logrithmic concentration.
While the changing process dynamics are brought
out by introducing a buffer into a solution which
significantly alters the response of the system , by
changing the concentration of the control reagents,
and by changing the set point.
3. SCHEMATIC OF THE PHYSICAL PH
CONTROL SET UP
ADC
Card
pH sensor
Input
stream + controller
Buffer
CSTR Acid Base
4. INTRODUCTION TO FUZZY LOGIC
Fuzzy logic, a relatively new cutting edge technology, is
nowadays gaining popularity.
Fuzzy control is a practical alternative for a variety of
challenging control applications since it provides a convenient
method for constructing non-linear controllers via the use of
heuristic information.
With proper design of its components along with a wisely chosen set
of rules, fuzzy control is all set to crack the most complex of control
problems- thanks to Lotfi A. Zedah, who is regarded as the father of
Fuzzy Logic.
18. CONCLUSION
Study of pH neutralization process control has
been carried out successfully using MATLAB.
It has been demonstrated that fuzzy logic control
performed well to control the highly nonlinear pH
neutralization process within the defined range.
The results obtained from the 9 rules fuzzy logic
controller is not sufficient to obtain a good pH of
waste water.
Although 15 rules fuzzy logic controller able to
control the pH of waste water, but 21 rules fuzzy
logic controller is more effectively maintain the pH
of waste water at 7±1.
19. REFERENCES
S. B. Mohd Noor, W. C. Khor and M. E. Ya’acob, “ Fuzzy logic control of a non
linear pH in waste”, International Journal of Engineering and Technology, Vol.
1, No. 2, 2004, pp. 197 - 205
