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What are the ways to maintain the desired groups of microorganisms in biological wastewater treatment systems?...

What are the ways to maintain the desired groups of microorganisms in biological wastewater treatment systems? Describe and explain with examples.

This is specifically for water and wastewater engineering

Engineering   Civil-Engineering   
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Answer #1
  • The following are some major ways of maintaining desired microorganisms in Waste water treatment .
  1. Attached Growth system .
  2. Suspended Growth system.

1] Attach growth system - Example -Trickling Filter -In these type of system Micro organism are attached to a filter and forms a biofilm on the filter , Now waste water is allowed to pass through this filter and hence biological treatment of water takes place. In simple language we can say here food is feeded to micro-organism.

2] Suspended growth system -Example- Activated sludge process - in these type of system Micro organism are suspended in waste water and in the form of activated sludge and hence biological activity takes place. In simple language we can say here micro organism is free to go to their food.

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