Wastewater May 24

Most of wastewater contain:

• Waste

• Water

• Contaminant

• Pollutant

Two types of wastewater source are known as:

• Point & non-point sources

• Industries and agricultural

• Sewage and commercial

• Urban and suburban

Comminutor and grit are examples of what level of wastewater treatment?

• Primary

• Secondary

• Preliminary

• Tertiary

If dissolved oxygen (DO) concentration is low, the biochemical oxygen demand (BOD) concentration is...

• Low

• High

• Medium

Company that manages the wastewater in Malaysia is known as...

• Suruhanjaya Perkhidmatan Air Negara

• Air Selangor

• Indah Water Konsortium

• Lembaga Urus Air Selangor