Biotechnologies in water treatment

What are the main elements to be removed during wastewater treatment?

• H & M

• N & P

• Na & K

• Heavy metals

Which type of bacteria is characterized by high phosphorus uptake?

• PAOs – Phosphate-accumulating organisms

• EBPR

• Organisms present in standard active sludge

In which phase PAOs are able to accumulate large amount of phosphor

• Both

• Anaerobic

• Aerobic

Why anaerobic phase is crucial for EBPR process:

• PAOs are able to consume and discharge their “batteries”

• Phosphate is turned into more digestible form

• They are able to grow in this phase.

Does PAOs pollute water with phosphate at some point?

• Yes, phosphate is environment friendly compound

• No, they only accumulate phosphate

• Yes, but they collect it later in much larger amounts

Which compounds are important for microbial fuel cells coupled with peroxicogulation process?

• Spectrophotometer

• Semiconductor film

• Electrodes

• Membrane

Why are the microbial fuel cells important for the peroxicoagulation process?

• Because they supply an electric current

• Because they are responsible for the fenton reaction

• Because they supply protons needed for this reaction

• None of the above are right

The peroxicoagulation process removes the dye by

• Oxidating the cathode surface and thereby supplying the electrons to reduce the iron anode and generate hydroxylions

• Using microorgansims that remove the dye

• Reducing the graphite cathode and oxidating the iron anode

• Oxidating the iron anode and thereby supplying electrons to reduce the cathode surface and generate hydroxylions

The physical processe(s) that allow the separation of pollutants from the water is/are:

• Sedimentation

• Metabolism of bacteria

• Filtration

• Distillation