More cards in this set

Card 16

Front

16. Where else does waste water come from

Back

Preview of the front of card 16

Card 17

Front

17. what is stage e one and stage two of sewage treatment

Back

Preview of the front of card 17

Card 18

Front

18. what happens to the effluent from the sewage?

Back

Preview of the front of card 18

Card 19

Front

19. what happens to the sludge from the sewage?

Back

Preview of the front of card 19