Krane CBG Process Automation System

Working of Proposed System and Operational Chronology
The following steps are working algorithm of automated biomethanation plant:
1. Press the start push button to start the process.

2. Pretreatment tank solenoid valve1 and solenoid valve2 gets open (waste material  transfer from pretreatment tank to mixing tank)
3. If top level sensor in mixing tank (agitator) detects the waste material, then solenoid valve1 and solenoid valve2 will cut off.
4. Simultaneously agitator motor gets on (to mix and grind the solid waste and liquid waste).
5. After some preset time the agitator motor will cut off.
6. Simultaneously screw conveyor motor gets on (to transfer the waste material from  agitator to digester).

7. If both top level and bottom level sensor in mixing tank de senses. Then screw conveyor will cut off.
8. Simultaneously recirculation pump gets on ( to mix the waste materials in
digester for improve digestion) 

9. After some preset time the recirculation pump will cut off.
10. If pressure reaches the set point in digester, then the blower gets on.
11. Simultaneously scrubber motor gets on.
12. After some preset time the blower motor and scrubber motor will cut off.
13. After these steps the process will repeat when the stop push button is pressed.

 
Advantages of Proposed System
A. Reduces the process time.
B. Reduces the man power
C. Collect performance data from plant
D. Avoids the human errors
E. Reliable and Replicable