QUIZ WW2

Which process is a variation of the suspended growth system?

• Trickling filters

• Bio-towers

• Sequencing Batch Reactor

• Rotating Biological Contactors

What is the key difference between suspended and attached culture systems?

• Microorganisms attach to surfaces in suspended systems.

• Microorganisms float freely in attached systems.

• Suspended systems do not use inert surfaces for microbial growth.

• Attached systems do not rely on microbial populations.

What is the primary advantage of the Sequencing Batch Reactor (SBR) system?

• Requires multiple basins for treatment

• Performs all treatment phases in a single tank

• Eliminates the need for aeration

• Uses minimal automation

What is the primary challenge faced by activated sludge systems?

• High land requirement

• Resistance to toxic shocks

• High energy consumption

• Low adaptability

Which feature makes trickling filters less effective in colder climates?

• High sludge production

• Lack of natural ventilation

• Microbial inactivity in cold temperatures

• Requirement for constant recirculation

What is the primary purpose of tertiary wastewater treatment?

• Removal of heavy metals

• Disinfection of pathogens

• Removal of over 99% of pollutants

• Reduction of solid waste

Which chemical is commonly used for phosphorus removal in tertiary treatment?

• Sodium hypochlorite

• Aluminum sulfate (alum)

• Sodium hydroxide

• Ammonium chloride

What is the role of UV disinfection in wastewater treatment?

• Oxidizing organic matter

• Absorbing energy to inhibit microbial replication

• Breaking down phosphorus compounds

• Removing ammonia through nitrification

Which disinfectant forms trihalomethanes as a byproduct?

• Chlorine

• Ozone

• UV light

• Calcium hypochlorite

What is the main advantage of ozone as a disinfectant in tertiary treatment?

• It leaves no residual chemicals.

• It is inexpensive and easy to use.

• It removes phosphorus effectively.

• It enhances plant growth.