Bioprocessengineering at Universität für Bodenkultur Wien

Flashcards and summaries for Bioprocessengineering at the Universität für Bodenkultur Wien

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Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

Brazing vs. Soldering vs. Welding

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

Give the most general formula for the mass balance in a batch process!

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

What 2 large groups of balances do I have in BPE?
(Mathematically) For what balances/processes are they each used?
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Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

Difference between Steady state vs continous process?
what do they ech mean and what are their opposites?

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

For what entities (not SI, rather cathegories) can I set up a mass balance?

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

What is the chronological order of describing a biotech process?

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

What is th klA value in BPE?
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Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

How can I influence the kla value?

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

How is klA calculated?

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

What means WCW and DCW? + unit

Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

4 Ways to increase chemical reaction rate? (incl. reasons)
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Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

What are the 3 most basic prerequisites for a reaction?

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Exemplary flashcards for Bioprocessengineering at the Universität für Bodenkultur Wien on StudySmarter:

Bioprocessengineering

Brazing vs. Soldering vs. Welding
  • Brazing = Hartlöten = Joining possibly dissimilar metal parts with a filler. Might be more stable than the metal itself.
  • Soldering = Löten = like brazing with a lower Temperature (>450°C), possibly joining a wide variety of metals. The joint is usually weaker than the metals joint.
  • Welding = Schweißen, very hot way to join usually steel. The joint is as strong as the metal itself, if done right. Only metals of the same kind can be joint this way.

Bioprocessengineering

Give the most general formula for the mass balance in a batch process!
m(In) - m(out) + m(generated) - m(consumed) = m(accumulated)

Bioprocessengineering

What 2 large groups of balances do I have in BPE?
(Mathematically) For what balances/processes are they each used?
  1. Integral balance
    • amounts, often for batch process
  2. Differential balance
    • rates, often for continuous processes

Bioprocessengineering

Difference between Steady state vs continous process?
what do they ech mean and what are their opposites?
The 2 do not necissarily cancel each other out! (often go together)

A continuous process is one where mass enters and leaves. (opposite: batch process)
Steady state, on the other hand defines that process variables do not change over time. (opposite: transient state)

Bioprocessengineering

For what entities (not SI, rather cathegories) can I set up a mass balance?

  1. Total mass/moles
  2. Mass/Moles of chemical compound
  3. Mass/Moles of an atomic species

Bioprocessengineering

What is the chronological order of describing a biotech process?
  1. Draw a picture of the system and flows in and out
  2. Label picture
  3. Write general mass balance
  4. Write mass/Species balances
  5. Fill in numbers
  6. Check numbers and units

Bioprocessengineering

What is th klA value in BPE?
In Biotechnological processes, kla gives insight into how well the microorganisms are supplied with oxygen.

Bioprocessengineering

How can I influence the kla value?
  • higher rpm on stirrer
  • Higher aeration rate
  • optimisation of container/stirrer geometry
  • Increase of interphase - surface (gas - liqud)
  • optimisation of medium

Bioprocessengineering

How is klA calculated?
Not at all! It is dependent on so many variables -> it is measured.

Bioprocessengineering

What means WCW and DCW? + unit
  • WCW = Wet cell weight (g/L)
  • DCW = Dry cell weight (g/L)

Bioprocessengineering

4 Ways to increase chemical reaction rate? (incl. reasons)
  1. Incease surface area (solids) -> more exposed molecules
  2. Increase temperature -> higher mobility -> more prob. meeting
  3. Increase Concentration (liquids) -> -> more exposed molecules -> higher prob. of meeting reactants
  4. Use a catalyst -> lowers necessary reaction entropy

Bioprocessengineering

What are the 3 most basic prerequisites for a reaction?
  1. Reactants must collide
  2. Reactants must have the proper energy
  3. Reactants must have the right geometry

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