3. 4. 5. 6. (2 Points) Fill the blanks: The principal of biological processes used for wastewater treatment can be divid
Posted: Thu May 05, 2022 11:44 am
3. 4. 5. 6. (2 Points) Fill the blanks: The principal of biological processes used for wastewater treatment can be divided into two main categories: attached growth and suspended growth. Name the most common biological treatment approaches that belong to each of these categories? Attached growth: Suspended growth: (2 points) Fill the blank: What is the dominant form of alkalinity in a natural water at pH 7? (2 Points) True or False: Water softening is used to remove turbidity, color, and bacteria from drinking water. True False (2 Points) True or False: Recarbonation stage is not required in the "Split Treatment" scheme of water softening. True False (2 Points) Multiple Choice: In water softening processes, which chemical compound is commonly used, to provide the cheapest form of alkalinity, to elevate the pH. Sodium hydroxide (NaOH) a. b. Carbon dioxide (CO₂) c. Quick lime (CaO) d. Soda ash (Na2CO3)