Page 34 - Binder Pendampingan UTBK SAINTEK

process, in which helpful bacteria destroy about eighty percent of the
remaining organic waste agent, usually chlorine, before being discharged at
an approved site.

13. The text tells us about …
A. Sewage in brief
B. The waste water from factories
C. The contents of sewage
D. The treatments of sewage
E. The definition of sewage

14. Why is waste water a menace to or health?
A. Because it can be disposed of by discharging it into the body water or on
the land
B. Because it includes liquid baste
C. Because it usually contains pathogen and other substances that may
contaminate food and drinking water
D. Because it usually contains pathogen and other substances that are very
useful for our health
E. Because sewage fows into holding bank

15. Which process does not happen in the primary treatment?
A. The oil and grease is withdrawn from the tank
B. The sludge is skimmed off
C. The lighter materials float to the surface
D. The sewage is piped to the treatment plants
E. The sludge is withdrawn from the bank

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