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  7. Bioprocess Engineering Part 4: Available electrons and Degree of Reduction

Bioprocess Engineering Part 4: Available electrons and Degree of Reduction

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In this video electron balance has been discussed. Concept of available electrons and degree of reduction has also been focussed upon with suitable examples. Website: https://instantbiology.in/ Telegram channel: https://t.me/InstantbiologybyDrNeelabh Instagram: https://www.instagram.com/instant_biology_by_dr.neelabh/
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0:13
Hello everyone and welcome to Instant Biology by Dr. Neelam.
0:17
Today we are going to talk about Bio Process Engineering.
0:21
We started Bio Process Engineering lecture series and this is the fourth lecture of that series.
0:27
In lecture 1, we have already discussed about what is a system and what are its surroundings.
0:33
We also talked about different processes like continuous process, batch process.
0:40
We have discussed about the effect batch process, semi-batch process, etc.
0:45
In the second lecture, we talked about material balance.
0:48
In the third lecture, we discussed about elemental balance.
0:52
We also asked a question on elemental balance.
0:56
In the fourth lecture, we will discuss about electron balance.
1:00
And how to do electron balance.
1:03
So, without further ado, let's start.
1:05
What is electron balance?
1:08
The basic concept of electron balance depends on the number of electrons available for the transfer of oxygen when complete oxidation of a substance takes place to CO2, NH3 and H2O.
1:31
So what does it mean to say that whenever a substance is being completely oxidized,
1:38
what is being converted into what substance, either it is converted into carbon dioxide or
1:44
it is converted into NH3 or it is converted into H2O.
1:47
Basically, what are we talking about?
1:49
We are saying that complete oxidation should be there.
1:52
See, complete oxidation and incomplete oxidation, you can understand very easily by an example.
1:59
So what is an example?
2:00
If you have seen the process of glycolysis,
2:03
what is happening in the process of glycolysis,
2:05
we are converting glucose,
2:07
which is converted into pyruvate at the end.
2:09
And if oxygen is present,
2:11
then through the Krebs cycle,
2:12
it is converted into carbon dioxide and water at the end.
2:15
So if glucose is being converted into carbon dioxide and water,
2:19
if there is glucose,
2:23
and it is being converted into CO2 and H2O at the end,
2:27
This process is called incomplete oxidation.
2:39
This process is called incomplete oxidation.
2:41
This process is called incomplete oxidation.
2:45
This process is called incomplete oxidation.
2:48
This process is called incomplete oxidation.
2:51
This process is called incomplete oxidation.
2:52
This process is called incomplete oxidation.
2:52
This process is called incomplete oxidation.
2:52
This process is called incomplete oxidation.
2:54
This process is called incomplete oxidation.
2:56
This process is called incomplete oxidation.
2:57
So what you have to pay attention to is that you have to see
3:00
that the carbon dioxide, NH3, or H2O should be converted.
3:05
Now, how to calculate the available electrons?
3:10
So, what is to be noted is that the available electrons are nothing but the valency.
3:16
Valency is the valency of the substance that is being converted or the electron that is providing oxygen.
3:25
For example, the carbon's valency is 4.
3:29
Hydrogen is 1, Oxygen is minus 2, Sulphur is 6, Saurus is 5.
3:35
So, the valency of all these elements does not change much.
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