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Internship details
Company name: Medivest Sdn. Bhd. (Region Johor)
Address: No. 23-01 Jalan Setia Tropika 1/17, Taman Setia Tropika, 81200 Johor Bahru, Johor
Contact no.: 07-2315141
Industry Supervisor: En. Kisogana A/L Rathanasamy
Department: Facility Engineering Maintenance Services (FEMS)
Intern period: 20/7/2020 - 10/10/2020 (12 weeks)
yup that's me!!
---Your personal doctor here---
--Effort for a photo on top of cooling tower--
Momento~~~
Company Profile
Medivest has been at the forefront in ensuring that public healthcare standards in Malaysia are continuously raised. For more than 2 decades since 1996, they have continued to blaze new trails in healthcare support services. This company core competencies are in
- Facilities Management Services (FMS)
- Facility Engineering Maintenance Services (FEMS)
- Biomedical Engineering Maintenance Services (BEMS)
- Cleansing Services (CLS)
- Healthcare Waste Management Services (HWMS)
- Linen and Laundry Services (LLS)
- Sustainability Programme (SP).
Among the services, I am responsible for FEMS department as an operation engineer trainee and mainly involve in maintaining system operation such as sewage water treatment.
FEMS details
FEMS focus on the operation and maintenance of all mechanical and electrical engineering systems and plants, civil engineering systems and plant, civil engineering works including buildings, roads, drains, water supply, sanitary plumbing sewerage systems as well as ground and landscaping.
My personal reflection
From the very first day with the Medivest Sdn Bhd, everyone welcomed me as a member of the team and genuinely expected me to make a significant contribution since I was the first-ever intern under FEMS department.
The experience working with hospital support service development helped me better understand the incredible reach of one division aiming to sustain the hospital operation system for not only one hospital but coverall 8 site hospitals. This made me realize that assisting my supervisor, En Kisogana who acts as the regional FEMS operation engineer is not an easy task as he carrying the responsibility to achieve the goals of FEMS department. Considering the time he spares and full guidance in the working field area really boosts my confidence and engineering skills in completing various of tasks. Here are some pictures I assisting the whole team;
Eventually, the bonding created within the Medivest staff brings joy and meaningful experience to me. Everyone I met, from engineers to technicians really helped me grow, both as an employee and a person. Their dedication to their jobs is something I will never forget.
Training Work
Water Sampling for Sewage Treatment Plant (STP) at Hospital Permai, Johor.
I was on-site STP monitoring with the STP coordinator En. Retzuan on September 27, 2020, to get a full hands-on learning experience on water sampling. This exposure greatly improves my understanding of environmental literacy and also provides data on the Intermittently Decanted Extended Aeration (EA) log sheet for daily monitoring. Bp Food Testing Sdn Bhd's sampler came to Hospital Permai STP once a week as the Population Equivalent (PE) exceeded 5000.
At first, he will take an influent raw sewage water sample for temperature and pH testing at the primary screening chamber.
Figure 1 Influent water sample
This is the device used for thermometer check,
Figure 2 Infrared Thermometer Laser-point
The equipment used for pH test by the sampler company is called a photometer. Later, a specialized tablet reagent will be used to dissolve together with the influent raw sewage water.
Figure 3 Process of dissolving tablet reagent for pH test
Figure 4 Water Sample for pH parameter
This is the result recorded for influent water with pH = 7.24
Figure 5 Photometer with influent water
Later the effluent water also being sampling and the pH test result showing the final treated pH value of 7.21
Figure 5 Final effluent sampling with pH result
Thus, it is considered acceptable results as the normal standard sewage water have a pH range of 6.5-8.4. In the end, the sampler will label each container with an influent and effluent water sample taken and proceed to the lab for other parameter checks.
Figure 6 Labelling the container
Sewage Treatment Plant (STP) in Hospital Permai
After water sampling, I got the opportunities to learn and see the process flow of the influent raw sewage water until the final treated effluent water that will be discharged to the river. Overall, the objective is to release safe water to the environment. Below is my simple rough sketch drawing of the STP at Permai Hospital, Johor.
Figure 1 Simple Process Plan in STP using Autocad drawing software
What I can note is that the STP process works at various levels and mainly involves in biological treatment. The raw sewage water will go through several processes that include preliminary treatment, primary treatment, and secondary treatment, and even tertiary treatment in a larger plan. STP in Hospital Permai include,
Preliminary treatment (removal of coarse solids)
- Primary bar screening chamber
- Secondary Bar screening chamber
Primary Treatment (removal of settle organic and inorganic solids by sedimentation and skimming)
- Grit/ Grease Chamber.
Secondary Treatment (remove residual organics and suspended solids of organic matter)
- Aeration Tank (Aerobic biological treatment)
- Intermittent Aeration / Clarifier (This tank is a dual function that provides sedimentation for the biological sludge or called activated sludge that some of the portions is recycled to the aeration basin to maintain a high mixed-liquor suspended solids (MLSS) level and another remainder is discharged and sent to the sludge holding tank and dried at the sludge drying bed.
- Chlorine Contact Chamber
- Sludge Holding Tank and Sludge Drying Bed
In the Aeration tank, it is performed in the presence of oxygen by aerobic microorganisms gain from the return activated sludge from the intermittent clarifier. This STP using blower type aerator devices installed at the water surface. The contents are mixed vigorously by aeration devices which also supply oxygen to the biological suspension.
Figure 2 Aeration Tank 1
In the sludge drying bed, it provides the simplest method of dewatering. A digested sludge slurry is spread onto an open bed of sand and allowed to remain until dry. Drying takes place by a combination of evaporation and gravity drainage through the sand. Each interior partition portion has 7days dewatering and takes up a total of 28days for drying.
Figure 3 Sludge Drying Bed
The effluent water usually will undergo chlorine contact which provides primary disinfection by the surface water treatment rule. The design flow showing a partitioned compartment or a baffled basin that provides sufficient detention time of chlorine contact with wastewater for disinfection to occur. The minimum contact time is usually 30 minutes.
(a) (b)
Figure 4 (a)Chlorine contact chamber and (b)effluent channel
Performance Test on Sewage Treatment Plant (STP)
On 9th September 2020, I have to assist En. Retzuan, the STP coordinator on STP performance evaluation located at Hospital Sultan Ismail. The objective is to evaluate the efficiency of each parameter and plant operation. Below is the equipment used for the performance test.
Figure 1 Equipment used for performance test
The first parameter test is the SV30 test which by mean is the test ratio of volume settled sludge per volume mixed liquor. This test will be conducted in the aeration chamber. After 30minutes, final settling sludge will be obtained at the bottom of the jar which indicates dense sludge. A normal settling usually takes up to 50-100 mg/L.
Figure 2 SV30 Test
Next, parameter check for Dissolved Oxygen (DO), Biological Oxygen Demand (BOD), Oxygen Uptake Rate (OUR), Specific Oxygen Uptake Rate (SOUR) by using the portable electrode meter. Before the test, it ought to submerge the electrode with an electrolyte solution to allowed voltage running and conduct electricity. Thus, the dissociated ions can move freely in solution, allowing a charge to flow.
Figure 3 Portable Electrode Meter testing
Below is the reading for each parameter in the aeration chamber.
|
DO: 2.62mg/L |
BOD: 2.58mg/L |
OUR: 13.80mg/L/h |
SOUR: 120mg/h/g |
Figure 4 Parameter Check for DO, BOD, OUR, and SOUR.
Next, I ought to take the MLSS reading for suspended solids levels by using a portable suspended solids meter.
Figure 5 MLSS readings
Then, the parameter test for temperature and pH reading scale at four different locations which stated below. Each test was repeated 3 times for accurate reading.
|
Influent pH=6.94 |
Aeration Chamber pH=7.18 |
Secondary Clarifier pH=7.16
|
Effluent pH=7.12 |
Figure 5 pH reading at 4 different location
Next, by using the clarifier sludge jar to determine the depth of the sludge blanket in the secondary clarifier. The normal measurement supposed range between 1/3 of clarifier depth.
Figure 6 Sludge Blanket parameter test
Lastly, ammonia concentration checked by taking the effluent water and diluted with specialized reagent B and 4drops of reagent A. The instrument will displays the results in mg/L of ammonium ion ( ) after 3minutes and 30seconds as the timer displayed. Later, the result will be recorded and the performance parameter will be evaluated.
Figure 7 Ammonia parameter check
Fire Certificate (FC) Inspection
On 9th September 2020, I have attended the annual inspection for fire certification in Hospital Permai. Fire Certificate (FC) issued by the Jabatan BOMBA dan Penyelamat Malaysia objectively to ensure the building is secured and comply with the BOMBA requirement.
The internal inspection was done by a hired professional fire contractor with Safety& Health Officer of Medivest that can give a more detailed inspection.
Figure 1 Meeting Briefing with BOMBA, Medivest team, and Hospital Director.
They will inspect the mechanical parts of the fire fighting system and make sure everything is in order. It is important to ensure the firefighting system is in good condition to prevent being compound by the authority.
Figure 2 Testing Fire Pump Flow
Figure 3 Testing on the Firefighting lift when complying with evacuation alarm
Figure 4 Testing the pressure of fire hose reel
Figure 5 Smoke detector test
Overall, I learn much valuable knowledge of fire safety inspection and how the procedure work. Later, I ought to update the FC findings in the excel format for the future action plan to be commissioned.
