EWater treatment is a procedure that consists of eliminating polluting substances located in the water. Three types of treatment are carried out to remove these residues: physical (separation of solids such as viscosity and particles of earth and sludge); chemical (neutralization and disinfection of chemical elements such as metals, phosphates, nitrogen, etc.) and biological (removal of microorganisms such as bacteria, sludge and anaerobic biodigestion).
Next, we present the systems present in the primary treatment to remove impurities in the water.
The pretreatment or primary treatment consists of removing coarse suspended solids, where precipitation or gravitational sedimentation is carried out to separate the components. Depending on the case and the quality of the final effluents (water escaping from a natural body of water), you may need a flotation, coagulation or filter system. The objective of this treatment can be varied, since it can consist of regulating pH, temperature, color, smell, reduction of suspended solids, elimination of floating matter and elements that could damage later stages of treatment.
FILTRATION SYSTEMS WITH SAND (SILICA)
The separation of these particles prevents the clogging of “downstream” pipes and the protection of “upstream” equipment.
Without adding chemicals, they are used to remove heavy solids as well as floating particles such as oil from wastewater. These are the following systems that are available:
- Sedimentation units.
- Screw conveyor for sand
- API / CPI / TPI oil and water separators.
- Cross flow separators.
- Countercurrent separators.
- PPA modules.
They are used to isolate materials through flotation by air or dissolved gas.
COAGULATION SYSTEMS AND THICKENERS
They are used to remove emulsions and heavy metals from wastewater through the addition of precipitants, coagulants or flocculants. There are two more treatments (secondary and tertiary) that help clean the water, which we will cover in future blogs. If you require a valve to solve the critical situations of your water treatment plant, contact us and we will advise you.