Internship in Nestlé - 15-16th Feb 2017 (8am - 5pm)

Wednesday, 15^th Feb 2017 (8am - 5pm)

At 9.15 a.m., we had a daily review meeting with the operators.

Between 9.30 and 10.15 a.m., I was in the WWTP to observe unit operations and conduct a final pipeline tracing. In general, worn pipelines in the entire WWTP were replaced and arranged as an above-ground type.

Between 10.30 a.m. and 12.30 p.m., I was in the WWTP laboratory to conduct an experiment of flocculation in sludge solution by a flocculant, polymer (polyacrylamide) solution. Finally, this experiment could be carried out with the installation of a new sludge feed pump so that the sample can be collected. The sludge sample and polymer solution were taken from the sludge silo with Vasu’s assistance. The objective of this experiment is to determine an optimum polymer dosing for flocculating particles in the sludge mixture before feeding it into the Filter Press system for dewatering. I had recorded the results based on my observations and taken several photos as a reference.

Between 3.00 and 5.00 p.m., I had prepared a laboratory report for the experiment conducted. The format of the report is same as the previous one, which includes procedure, result tabulation, detailed discussions and conclusion.

Sludge Flocculation

Thursday, 16^th Feb 2017 (8am - 5pm)  

At 8.00 a.m., Jaclyn had left a message for me to help her guide the operators about the procedures of MBR desludging and strainer cleaning. Later, I did a final check on the laboratory report, which was prepared yesterday before sending it to Tee.

At 9.15 a.m., we had a daily review meeting with the operators.

At 10.30 a.m., I guided Vasu through the procedure of MBR desludging when MLSS exceeds 10000 mg/L in the DPRS site. The whole process is done manually. However, at 3.00 p.m., I was informed by Leon that he had set a schedule using PLC to carry out a daily desludging step automatically.

From 11.00 a.m. to 12.15 p.m., Fam, Tee, and I had a short meeting to discuss the Spare Parts Lists and the FLOCs. Fam had asked me to help him record the specifications of additional spare pumps which are located in the DPRS storeroom. I had updated those files based on their comments after the meeting. Afterwards, I had shown the material balances of WWTP and parameters to Tee for any feedback.

Meanwhile, I had shown the WWTP flow diagram that I had reviewed and updated during these months. Later, Fam had printed an old version of WWTP mapping in A2 size, which was drawn by a draftsman, to me. I had to mark down any new pipelines and equipment that existed in the current WWTP on this A2 paper for their future reference.

At 2.00 p.m., I had asked Lakman, from the Technical Store, about the systematic approach of recording the spare parts. He explained the method while showing me the guidelines.

At 5.00 p.m., I had sent all three updated FLOCs for the new DAF, DPRS, and Filter Press to Tee and Fam for checking. Tee had given several comments and asked me to update both the SOP of the new DAF system and the Filter Press, especially including a section about the Air Saturation System for the new DAF system.