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Industrial Water Reuse and Treatment

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Questions and Answers

What is the primary objective of the water treatment plant?

To reduce the Total Organic Carbon (TOC) from the treated sewerage water

To produce a water quality suitable for re-use by the Chevron refinery (correct)

To act as an absolute barrier to suspended solids and bacteria

To remove dissolved salts from the treated sewerage water

What is the location of the treatment plant?

Near the Chevron refinery in Cape Town

On the premises of Chevron refinery (correct)

Adjacent to the Potsdam sewage works

On the premises of the Cape Metropolitan Council

What is the purpose of the ultrafiltration (UF) plant?

To act as an absolute barrier to suspended solids and bacteria (correct)

To remove dissolved salts from the treated sewerage water

To reduce the suspended solids (SS) from the treated sewerage water

To reduce the Total Organic Carbon (TOC) from the treated sewerage water

What is the purpose of the dissolved air flotation (DAF) process?

To reduce the suspended solids (SS) and Total Organic Carbon (TOC) from the treated sewerage water Signup and view all the answers

What is the purpose of the reverse osmosis (RO) plant?

To remove dissolved salts from the treated sewerage water Signup and view all the answers

Where does the treated sewage come from?

The Potsdam sewage works Signup and view all the answers

What is the primary purpose of the DAFs in the process?

To remove most of the solids by floating and sedimentation Signup and view all the answers

What is the expected recovery of the UF plant?

88% Signup and view all the answers

What is the primary purpose of the coagulant in the flocculation chamber?

To neutralize the charge of the colloidal particles Signup and view all the answers

What is the result of the chemical theory of colloidal stabilization?

Particle repulsion Signup and view all the answers

What is the purpose of the saturator system in the DAF process?

To produce air for floating the solids in the DAF Signup and view all the answers

What is the final water quality produced by the plant?

Conductivity of 240 uS/cm Signup and view all the answers