Types of Wastewater Treatment Systems

The three basic types of wastewater treatment systems are aerobic aeration, anaerobic digestion, and sewage desalination. These processes remove solid waste and organic matter from the water, resulting in clean and safe water. These methods involve the break down of organic matter through chemical processes such as chemical coagulation, hydrochloric acid, and sodium carbonate. Secondary treatment, on the other hand, removes suspended particles and biodegradable material by utilizing physical, chemical, or biological processes.

Secondary treatment is usually the first step in the wastewater treatment process, and involves the use of filters and aeration. Aerobic aeration is a type of wastewater purification that requires a large amount of oxygen and nutrients. The septic tank allows particulate matter to settle, preventing large solids from plugging the drain field. The effluent is then passed through an effluent screen, removing suspended solids from the water. The final treatment happens in the soil adsorption field.

Secondary treatment, also called aeration, involves adding oxygen to wastewater. Aerators are systems of pipes with discs attached to them. These disks have holes for air to pass through. The oxygen in the wastewater causes bacteria to break down organic matter. Although aerobic aeration is a common treatment method, it cannot remove nitrates and other chemicals. Further, aeration is expensive and requires regular maintenance.


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