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Home » Water Treatment Solutions » Water Treatment System Design » Raw Water Quality Analysis
Water & Wastewater

Raw Water Quality Analysis

Understanding the quality of raw water is essential for designing an efficient and reliable treatment system. Below are key parameters engineers assess to ensure reliable performance and compliance.

Hardness
Caused by calcium and magnesium ions, hardness leads to scale buildup in pipelines, boilers, and equipment, reducing efficiency and lifespan.
Turbidity
Refers to the cloudiness of water caused by suspended particles such as clay, silt, organic matter, plankton, or microorganisms. High turbidity can reduce treatment efficiency and affect the quality of the final product.
Electrical Conductivity (EC)
Measures the water’s ability to conduct electricity, which increases with the concentration of dissolved ions such as salts, minerals, and chemicals. Pure water has very low conductivity, indicating low ionic content.
pH
A key factor that influences chemical reactions and corrosion within the system. Maintaining proper pH helps ensure stable and efficient operation.
Biochemical Oxygen Demand (BOD)
Indicates the amount of oxygen microorganisms require to break down organic matter in water. High BOD levels mean high organic pollution and poor water quality.
Chemical Oxygen Demand (COD)
Represents the amount of oxygen needed to chemically oxidize organic and inorganic substances in water. A high COD value indicates significant pollution.
Total Kjeldahl Nitrogen (TKN)
Measures the total nitrogen in the form of ammonia and organic nitrogen. Excessive TKN can lead to the formation of toxic compounds such as ammonia, nitrite, and nitrate, causing algal blooms and harm to aquatic life.
Sulfide
Formed during the anaerobic decomposition of organic matter by bacteria, high sulfide levels indicate oxygen-deficient conditions, produce foul odors, and can cause severe corrosion in pipes and equipment.
Heavy Metals
Dense metallic or semi-metallic elements such as lead, mercury, cadmium, arsenic, chromium, zinc, and iron. Even at low concentrations, they are toxic, non-biodegradable, and can accumulate in the environment and food chain.
Microorganisms
Includes bacteria, coliforms, viruses, fungi, protozoa, and E. coli — all of which may cause diseases. Monitoring and treatment are essential to maintain safe microbial levels in water.

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