What is Turbidity?
Turbidity is defined as the presence of suspended particles in water that obstruct the passage of light through it. It can be stated as 'visual interference' to make this definition easier to understand. Colloidal or coarse dispersion particles may be suspended.The degree of turbulence is determined by their size.
What is a Turbid sewage?
Suspended particles, such as clay, silt, finely split organic and inorganic debris, soluble colored organic compounds, and plankton and other tiny creatures, generate turbidity in wastewater.Turbid water has a muddy or hazy appearance and is unappealing to look at. As sewages get more powerful, the turbidity rises.
Turbidity is a significant issue in wastewater treatment!
Various research investigations have concluded that pH has a substantial impact on the system, with both a positive and negative link on turbidity reduction.
The hasty transition of humanity from traditional lifestyles to modernity and urbanization resulted in the depletion of vital non-renewable natural resources and environmental breakdown. As a result, billions of gallons of wastewater are dumped into freshwater bodies every day from cities, housing settlements, factories, and agricultural activities, altering pH, turbidity, and other original features.
How to remove Turbidity in Sewage Treatment Plants?
Turbidity is the haziness of water or other fluids produced by the presence of numerous unseen particles. Because of their size, these suspended particles are not big enough to settle quickly. As a result, gravity takes a long time to settle them.
Coagulation, flocculation, clarifying, and finally filtering are the standard procedures for efficient elimination.
Coagulation and flocculation are critical steps in the treatment of both drinking water and wastewater. They offer a dependable method for reducing water turbidity, which is an important indicator of water quality. They can reduce suspended particles and organic loads by up to 90% in wastewater treatment.
Suspended particles are present in all waterways. The tiniest particles (colloids) are stabilized by physical forces (static electricity) acting on the particles themselves, and they repel each other because they all have a negative charge when suspended in water. They stay floating rather than clumping together and sinking out of the water as a result of this. It might take days, weeks, or even millennia for them to settle out!
Coagulation and flocculation are two distinct processes that are utilized in tandem to overcome the forces that keep suspended particles in place. While coagulation neutralises the charges on the particles, flocculation allows them to bind together and grow in size, allowing them to be removed from the liquid more readily.
After correct agitation and adequate retention time, the suspended particles in the water clog up with the chemicals and create heavier flocs, which finally settle.
The sequence is as follows:
1: A fast mixing or flash mixing with a retention time of 1 to 5 mins maximum to mix up the reagents with effluent and destabilize the charged suspended particles.
2: A slow mixing with a retention time of 15 to 20 mins to avoid breaking of formed flocs.
3: A clarification zone with 2 hours retention time for settling of suspended solids.
4: Sand or carbon filtration for further removal of turbidity from the clarified water.
This retention time is subject to vary depending upon the influent turbidity and the amount of chemicals to be used.
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.
