Question

outline the main steps used in sewage treatment plant

Answer 1

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Sewage treatment is the process of removing contaminants from wastewater and household sewage water.

To make wastewater acceptable for reuse or for returning to the environment, the concentration of contaminants must be reduced to a safe level, usually a standard set by the Environment Agency.

The features of wastewater treatment systems are determined by:

The nature of the municipal and industrial wastes that are conveyed to them by the sewers.

The amount of treatment required to keep the quality of the receiving streams and rivers.

Depending on the wastewater treatment stage, sludge could be categorized in:

Primary: produced during primary wastewater settling.

Secondary or biological: produced during secondary biological treatment.

Mixed: primary and secondary sludge mixtures.

Tertiary: produced during tertiary or advanced wastewater treatment.

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Answer 2

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STAGE ONE: SCREENING

STAGE TWO: PRIMARY TREATMENT

STAGE THREE: SECONDARY TREATMENT

STAGE FOUR: FINAL TREATMENT

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