At 8.30 a.m., Tee had asked me to help him draw a flow diagram of liquid sugar transfer from the tanker and it needed to be done by today.
At 9.15 a.m., we had a meeting with the operators as usual.
Between 10.00 a.m. and 12.05 p.m., the DPRS training session was conducted by introducing Maintenance Cleaning of MBRs which is performed weekly. The chemicals used during the maintenance cleaning of fiber membranes are sodium hypochlorite (NaOCl) and citric acid. Both chemicals cannot be dosed at the same time to prevent the formation of toxic chlorine gas, Cl2. Leon had explained the purpose, processes involved and duration during the cleaning of MBRs.
Between 2.00 and 5.30 p.m., the training was continued by introducing the key parameters to be monitored during cleaning. Leon told us that transmembrane pressure (TMP) should be recorded before and after the cleaning process. We had a discussion to plan a suitable schedule for maintenance cleaning before entering the data into the PLC. He reminded us that we should always check the quantity of the chemicals to prevent running out. Later Tee asked me to check the amount of chemical carboys in the storeroom.
At 6.00 a.m., we met a man at the filter press site while he was
observing the filter press. He demonstrated a simple experiment to us about
the flocculation of sludge by using different types of polymer solution. Later
he gave us several suggestions on the improvements of the filter press
system.
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