At 9.15 a.m., as usual, we had a meeting with the operators. The operators were highlighting any updates of each service section.
At 9.40 a.m., Vasu was with someone at the final discharge sampling point, which is near to the WWTP control room. He told me that every early of month an officer from an agency will come to collect the water samples from several sampling points such as final discharge, aeration tank, balance (equalization) tank, DAF influent and effluent. The officer will analyse the water parameter and report to the Department of Environment (DOE) Malaysia to monitor the quality of discharged water from the industry.
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| Final discharge point |
At 10.30 a.m., I followed Vasu to DAF. I observed the pipelines around the existing DAF unit. He monitored the water condition and adjusted the chemical dosing. Later he explained to me the air saturation unit of DAF. The purpose of air saturation is to produce the raising of suspended solids onto water surfaces in the form of scum by aeration and chemicals, followed by removal of scum by skimming.
While observing the air tubing, suddenly there was a water droplet dropped into my eye. Vasu brought me to wash my eyes using clean water at the washing station. It is suspected there is a leakage around the old DAF unit.
At 1.45 p.m., I continued data gathering and this time observing the chemical dosing systems of the DAF unit. Vasu told me that three types of chemicals are used in dosing systems, which are FeCl3, sulfuric acid and polymers for coagulation and flocculation processes. He also guided me to observe the pipelines, connections and fittings of chemical dosing systems.
At 3.30 p.m., I drew the P&ID for the existing DAF unit using Microsoft Visio based on the information I collected today.
At 4.30 p.m., Jaclyn showed me the operational manual of DPRS consisting of a membrane bioreactor (MBR) and reverse osmosis (RO) system. She told me that recently we have been focusing on this project since the installation of DPRS is ongoing.
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