Natural Resources and Water Treatment Processes Explained

Natural Resources

Natural resources are elements of nature that society utilizes through technology for its benefit. These resources are categorized as follows:

• Renewable resources: Require short periods of time for recovery.
• Nonrenewable resources: Tend to deplete as they are consumed, as their renewal cycles are extremely long.

Potable Water Purification

Water purification is essential for human consumption. The process involves:

• Filtration: Water is artificially filtered to perform biological therapies that eliminate pathogens and organic matter.
• Sterilization: The process concludes by eliminating surviving microorganisms through chlorination or ozonation. For lower volumes, UV radiation treatment is also used.

Wastewater Treatment Systems

Treatment systems aim to return water used in various applications to the wild in the best possible condition.

Pretreatment

The separation of suspended solids reaching the treatment plant:

• Intake: Solids are separated by passing water through thick or thin bars.

Primary Treatment

This stage involves the separation of suspended solids and floating material not retained during pretreatment:

• Decanting: Performed in primary clarifiers.
• Flocculation: Chemicals combine with suspended solids to form larger aggregates.
• Neutralization: pH adjustment to facilitate subsequent processing.

Secondary Treatment

A set of biological processes, supplemented by secondary decanting, aimed at removing organic matter:

• Activated Sludge: Water passes through large deposits under aerobic conditions, allowing bacteria to degrade organic matter, which requires a consistent oxygen supply.

Tertiary Treatment

Advanced methods that provide high-purity water, though still unfit for human consumption, by extracting remaining organic matter and inorganic salts not held in previous stages.