Trickling Filters and Their Functions

Trickling filters, also known as biofilters, are fixed bed biological reactors operating in aerobic conditions. Microorganisms attached to plastic film media remove soluble organic matter from sewage. The process involves spraying sewage over the bed surface, where pollutants are absorbed and removed. Trickling filters are efficient, with removal rates up to 95%, and are cost-effective compared to activated sludge systems. They require less land, have low maintenance costs, and are resistant to shock loadings. The video concludes with a call to subscribe for more tutorials.

What is the primary function of microorganisms in trickling filters?

• To provide structural support

• To remove soluble organic matter

• To increase water flow

• To reduce air pollution

What is the main purpose of the fill media in trickling filters?

• To support microorganisms

• To filter out large debris

• To increase water temperature

• To add nutrients to the water

Why is primary sedimentation important before using a trickling filter?

• To reduce noise

• To add nutrients

• To prevent clogging

• To increase water temperature

Which pollutants are primarily removed by trickling filters?

• Heavy metals

• Soluble organic matter

• Pesticides

• Radioactive waste

How can the rotation velocity of the rotary distributor be adjusted?

• By changing the tank size

• By altering the incoming water flow

• By adding more microorganisms

• By increasing the bed height

What is the effect of a slower rotation velocity of the rotary distributor?

• Decreased water volume per square foot

• Reduced air mixing

• Higher risk of clogging

• Increased flushing effect

What happens to the biofilm over time in a trickling filter?

• It evaporates

• It solidifies

• It thickens and detaches

• It becomes transparent

Which of the following is NOT an advantage of trickling filters?

• Cost-effective operation

• High efficiency for ammonia oxidation

• Large land area required

• Low maintenance requirements

What is a key difference between trickling filters and activated sludge systems?

• Trickling filters are less cost-effective

• Activated sludge systems need artificial aeration

• Activated sludge systems use less space

• Trickling filters require more mechanical equipment