Since 8.00 a.m., I prepared a simple version of the SOP of the membrane chamber filter press system by summarizing the detailed SOP version I created previously. This version is presented in the form of a process flow chart.
At 9.15 a.m., we had a daily review meeting with the operators. Tee asked me to guide the WWTP operator, Ridzuan to operate the membrane chamber filter press system as he did not attend the training session last week.
At 10.00 a.m., I briefly introduced the filter press system before guiding Ridzuan to operate the system. The sludge bags were full and we had replaced empty bags before I demonstrated the filter press operation.
Between 3.00 and 6.00 p.m., the DPRS training session was finally carried out. The first section is a simple introduction to DPRS which was conducted by Leon. He introduced and explained the function and control philosophy of each equipment while we walked around the DPRS site. Later we studied the whole DPRS with the aid of P&ID. Meanwhile, we were informed that the post-biological aeration tank is filled with the activated sludge taken from the recirculation pit.
The second section is the introduction of using the programmable logic controller (PLC) in the DPRS control room which was conducted by Maurice. A touch panel is used as an interface between the operator and the PLC, which is known as human-machine interaction (HMI). He introduced and guided us to operate the touch panel. Using the display, the control systems of DPRS can be adjusted to the desired circumstances. The functions of the display are:
(a) displaying failure or events to the operators;
(b) providing information or parameters to the operators about the actual situation, such as pressure and flowrate; and
(c) adjusting the parameters by entering the desired setpoints accordingly.
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