What are Total Dissolved Solids?
Total dissolved solids (TDS) are a measurement of the molecular, ionized, or micro-granular (colloidal sol) suspended content of all inorganic and organic compounds present in a liquid. TDS levels are frequently expressed in parts per million (ppm).
How to calculate the TDS of a mixed effluent in an ETP?
Sodium, potassium, calcium, magnesium, chloride, bicarbonates, and sulphates are all examples of dissolved organic matter and inorganic salts in wastewater.
TDS levels in waterbodies can be raised by human activities such as agriculture, water consumption, industrial operations, and mining. TDS levels that are too high in a waterbody are hazardous to aquatic species including fish, amphibians, and macroinvertebrates.
Removal of TDS from Wastewater
Physical adsorption, reverse osmosis (RO), distillation, precipitation, membrane filtration, and bacteria-based bioremediation are some of the current methods for removing TDS from wastewater.
Measurement of TDS in effluent water
Gravimetric analysis and conductivity are the two most used methods for determining total dissolved solids.
The most precise procedures include evaporating the liquid solvent and measuring the bulk of leftovers, that are left behind. Although time-consuming, this strategy is typically the best. Gravimetric techniques are useful when inorganic salts make up the bulk of TDS.
Water's electrical conductivity, or specific conductivity, is proportional to the concentration of dissolved ionized solids in the water. Ions from dissolved particles in water allow the water to conduct an electric current, which may be measured with a standard conductivity metre or a TDS metre. Conductivity offers an estimated number for TDS concentration when coupled with laboratory TDS tests, generally to within ten percent accuracy.
The following equation can be used to estimate the link between TDS and specific conductance:
TDS = keEC
It is measured in milligrams per litre, while EC is measured in micro siemens per centimetre at 25 degrees Celsius. “k” is a correlation factor that ranges from 0.55 to 0.8.
Some TDS metres will calculate the number of parts per million (ppm) based on the electrical conductivity measurement, therefore, 1 ppm equals 1 mg of dissolved solids per kilogram of water.
Technical assistance and guidance
Netsol Water collaborates with a wide range of international organizations to tackle complicated wastewater problems by strategically integrating modern treatment technology with practical solutions.
Think of us when it comes to wastewater management for your organisation, adapted to your specific needs. We provide a cost-effective method to reuse and recycle water. Deal with us for wastewater treatment equipment’s and develop your business while complying with environmental standards.
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