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Trickling Filter in Unit Operation

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Questions and Answers

What role do the bacteria play in the biological film within the filter system?

Oxidize ammonia to sulphides

Promote the accumulation of solids

Break down complex organic materials (correct)

Enhance the settling of humus

How do higher organisms such as protozoa contribute to the filter system?

Promote bacterial growth

Accelerate the development of the biological film

Prevent the filter from blocking

Improve settling characteristics of solids (correct)

What can poison the development of the active slime layer in a filter system?

Bacterial growth

High organic loading rates

Increased hydraulic load

Toxic chemicals (correct)

What is the function of a slime layer in a low-rate filter system?

Accelerate the removal of loose microbial film Signup and view all the answers

What is the main role of the large surface area created in the filter bed?

Improve settling characteristics of solids Signup and view all the answers

Why is a simple filter inefficient when operated at high organic loading rates?

It breaks down complex organic materials inadequately Signup and view all the answers

What is the main action of a trickling filter in wastewater treatment?

Metabolization of organic matter from the effluent Signup and view all the answers

What is the recommended voidage (% air space of total bed volume) for packing material in trickling filters?

45-55% Signup and view all the answers

Which type of packing material would be preferable in trickling filters due to its higher surface area and voidage?

Synthetic Signup and view all the answers

What is the function of the secondary sedimentation tank or humus tank following a trickling filter?

Remove suspended matter from the effluent Signup and view all the answers

How does a trickling filter differ from a typical filtration process?

It relies on micro-organisms adhering to the packing material Signup and view all the answers

Why are some trickling filters designed in a rotary system?

To allow for more uniform hydraulic loading Signup and view all the answers