1) Describe what Activated Sludge is.
2) Physiologically, how have microorganisms adapted to survive (and thirve) at extremely low
pH values?
3) How is elemental sulfule (S0) (an insoluble element) oxidized by bacteria?
4) Why would the strong smell associated with activated sludge disappear during the incubation
process?
Solution
1. Sludge is a thick material that is produced in various industrial process such as in the treatment
of sweage. Activated sludge has flocs of bacteria, which are suspended and mixed with
wastewater in an aerated tank. The process of treating sewage and industrial wastewaters using
air and a biological floc composed of bacteria and protozoa is known as Activitaed Sludge
Process. Activated sludge is used for treating wastewater as long as the pollutant to be treated are
biodegradable.
2. Microorganisms that survives at extremely low pH values are called acidophiles. Acidophiles
mostly pump-out protons out of the intracellular space to keep the cytoplasm near to the neutral
pH. In certain other cases the organism itself has an acidified cytoplasm which helps the protien
to evolve acid stability..
ICT role in 21st century education and it's challenges.
1) Describe what Activated Sludge is.2) Physiologically, how have .pdf
1. 1) Describe what Activated Sludge is.
2) Physiologically, how have microorganisms adapted to survive (and thirve) at extremely low
pH values?
3) How is elemental sulfule (S0) (an insoluble element) oxidized by bacteria?
4) Why would the strong smell associated with activated sludge disappear during the incubation
process?
Solution
1. Sludge is a thick material that is produced in various industrial process such as in the treatment
of sweage. Activated sludge has flocs of bacteria, which are suspended and mixed with
wastewater in an aerated tank. The process of treating sewage and industrial wastewaters using
air and a biological floc composed of bacteria and protozoa is known as Activitaed Sludge
Process. Activated sludge is used for treating wastewater as long as the pollutant to be treated are
biodegradable.
2. Microorganisms that survives at extremely low pH values are called acidophiles. Acidophiles
mostly pump-out protons out of the intracellular space to keep the cytoplasm near to the neutral
pH. In certain other cases the organism itself has an acidified cytoplasm which helps the protien
to evolve acid stability.
