Across
- 3. The first stage of treatment after pretreatment of wastewater
- 4. A chemical that can be used to disinfect water
- 6. A type of separation where a liquid mixture passes through a screen such as the 'bar screen' in wastewater pretreatment
- 9. A common use for the dried sludge removed from wastewater during treatment
- 10. The process that lets sediments settle to the bottom of a tank for collection
Down
- 1. Any water that goes down a drain or toilet in your house
- 2. One of the creek dams where Ballina gets its water
- 5. A chemical added to drinking water to help prevent tooth decay
- 7. One of the creek dams where Ballina gets its water
- 8. A chemical that can be used to disinfect water