Wednesday, 18th Jan 2017 (8am - 5pm)
At 9.15 a.m., we had a daily review meeting with the operators as usual.
Between 10.00 a.m. and 12.30 p.m., I continued updating the FLOCs by adding the information relating to maintenance. I first read the user manual of each pump and instrument before extracting the main information into FLOCs.
Between 3.00 and 5.00 p.m., Jaclyn and I with two WWTP operators, Vasu and Desa attended a training session by Chow. This session was about the basic operation of the filter press system. It can be operated either in automatic or manual mode. Throughout the training, I fully understand the procedure of operating this system.
At 5.00 p.m., Jaclyn and I represented Fam to listen to any feedback from the person in charge of MBR commissioning. According to Leon, tomorrow they will discharge clean water from the post-biological aeration tank before pumping in the sludge from the recirculation pit. They provided several suggestions about the temporary pipeline connections.
Thursday, 19th Jan 2017 (8am - 5pm)
Between 8.15 and 8.45 a.m., as usual, I walked around in WWTP. Leon had informed me they could not continue their progress to pump the sludge into the new aeration tank as the pump is not suitable to be used. I passed this message to Fam in the office.
At 9.15 a.m., we had a meeting with the operators. Tee had assigned me to prepare two versions of the SOP for filter press operation, one in a simple version so that the SOP can easily be understood by the operators, and another in a detailed version.
Between 11.00 a.m. and 12.30 p.m., Jaclyn and I followed the operation procedure to operate the filter press system. Firstly we switched on the sludge transfer pump to fill the thickener tank. However, there was no sludge flow even though the diaphragm pump was turned on while the polymer solution was continuously flowing into the tank. Then I realized that along the outlet of the sludge silo, the main gate valve was closed. I quickly turned on the valve and eventually, the sludge flowed into the system. Then the thickened sludge was fed into the filter press using the feed diaphragm pump. The feeding stage would last for a few hours.
At the same time, Fam was passing by and observing the filter press operation. During the feeding stage, there was a knocking sound and he tried to detect the sound source. He also asked us why not fully open the ball valve at the outlet of the feed diaphragm pump entering the filter press.
Later he asked me a question about the reason for using diaphragm pumps throughout the sludge delivery. I answered that it is due to its reliability and durability. He agreed with me and added some points: Diaphragm pump, which is a type of positive displacement pump, is suitable for slurry fluid as compared with centrifugal pump. Therefore most of the type of pumps used in WWTP is diaphragm pump.
Diaphragm Pump (Source: AirTech)
Between 9.30 - 11.00a.m.; and between 1.30 - 4.00 p.m., I had completed updating the FLOCs by adding the information relating to the maintenance and service of each equipment. Tee had assigned me to conduct an experiment on the flocculation of sludge by polymer solution and prepare a laboratory report for the results to determine the optimum dosing of polymer to be used.
The training session and meeting in the DPRS control room have been
cancelled for today.
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