Treatment Options for Water Waste - Science Assignment Help

Assignment Task

1. List and briefly explain two (2) treatment options for water and/or wastewater stream that contain trace/low heavy metal ions from industry sources. 
 

2. How can the level of dissolved oxygen (DO) in industry water supply be reduced? Present one option only and (a) briefly explain the scientific and/or engineering principles of the underlying processes, and (b) list the key design parameters that need to be determined during the process design stage of the treatment plant. 
 

3. A processing industry generates an organic wastewater stream of 200 kL/day and it is to be treated on site and the effluent discharged into domestic wastewater system for further treatment. The major compositions of the wastewater stream are given below. Design a suitable treatment process for the onsite treatment. Present your answer in (a) a schematic process flow diagram, which shows the flow rates and BOD values of all key process streams, and (b) for each key processing unit in your design, briefly explain the reasons for its inclusion in the treatment process. Your design must be theoretically sound and practically feasible. 

BOD (mg/L): 500 - 1200 

Suspended solids (mg/L): 10 - 50 

pH:  3.0 - 5.0 
 

4. Briefly discuss the concept of colour in the context of industry water use and/or treatment. 

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