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| Home > Product & Services > Quality Control |
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Laboratory and Water Quality Section |
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The Laboratory and Water Quality Section is located at the Laboratory Room in the administration Building at Banglen. The laboratory staff monitors the quality of both raw water and treated water and determines the quantity of chemicals needed in the treatment process. The laboratory is staffed with qualified scientists who are experts in the field of water chemistry and biology. The plant is also equipped with on-line chemical analysis equipment which continuously monitors the treatment process and records the data to the SCADA system. |
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1. Online Analyzer |
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The Online Analyzers comprise a group of electronic monitoring equipment installed in the Laboratory room. These online analyzers receive water samples continuously from every section of the production process 24 hours per day. They analyze the key water parameters i.e. dissolved oxygen (DO), turbidity, acidity, free residual chlorine, etc. Readings from the analyzers are recorded by the SCADA system and displayed in the Control Room. In this way the treatment process and quality of treated water ensures the quality of the water for example by adjusting the chlorine to kill bacteria. On a regular basis this technology helps to keep the water quality at the level specified in the standard of the Ministry of Industry (TIST. 257-1978). Thus, we are confident that our treated water is safe to drink. |
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2. Quality control (by manpower) |
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The laboratory staff carry out chemical analysis of certain key parameters every two hours i.e. turbidity, acidity, free residual chlorine, manganese (Mn) and check the function of each stage of treatment The laboratory staff also check the function of the automatic Online Analyzers for accuracy. In the event that errors in the readings from the automatic analyzers, an engineer from the maintenance team responds immediately to correct the fault. In addition at both Buddha Monthon Distribution Station and Mahachai Distribution Station operations staff check the water quality readings from the Online Analyzer and confirm the amount of residual chlorine before the water is distributed to the consumers. |
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3. Quality control of treated water and production process |
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The following are the key parameters for measurement in ensuring the required quality of the production process and compliance with the standard of the Thai Industrial Standards Institute (TIST 257, issued 1-1978); |
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 Physical and chemical testing on a daily basis of color, turbidity, smell, taste, acidity, conductivity, dissolved oxygen, iron, manganese
and chlorine. |
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- Chemical Oxygen Demand:- Weekly testing of acidity, total carbonate hardness or temporary and non-carbonate hardness, aluminum, calcium, magnesium, and chlorides
- Biological Oxygen Demand:- testing for solid and suspended solids. Monthly testing of ammonia, copper, zinc, sulfates, fluorides, nitrates, alkyl benzene sulfonate (ABS), and phenol.
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Biological Testing : daily testing of total bacteria, coli form bacteria, and shigella dysenteries. |
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Toxic Substance Testing : quarterly testing of mercury, lead, arsenic, selenium, chromium, cyanide, cadmium, barium by submitting
water samples to the research & Laboratory Development Center, Ministry of Public Health. |
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Pesticide Testing : yearly testing of a list of sixteen oregano-chlorine (OC) by other official quality control centre. |
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4. Quality control in Buddha Monthon Distribution Station and Mahachai Distribution Station |
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To achieve quality control confidently, the plant submits water sampling to a neutral facility, the Research & Laboratory Development Center, Ministry of Public Health for testing of every water process under (TIST 257, issued 1-1978 monthly. Moreover, the Provincial Waterworks Authority also tests Buddha Monthon pump station and Mahachai pump station once each month. |
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