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Question 18N.3.HL.TZ0.10c

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Date November 2018 Marks available [Maximum mark: 3] Reference code 18N.3.HL.TZ0.10c
Level HL Paper 3 Time zone TZ0
Command term List Question number c Adapted from N/A
c.
[Maximum mark: 3]
18N.3.HL.TZ0.10c

The diagram shows an overview of the Henriksdal wastewater treatment process in Stockholm, Sweden.

(c)

Probes are used to monitor significant variables within the fermenter. List three significant variables that should be monitored in the fermenter.

[3]

Markscheme

a. pH/acidity/alkalinity ✔

b. foam ✔

c. metabolites ✔

d. substrate ✔

e. oxygen ✔

f. carbon dioxide ✔

g. temperature ✔

h. pressure ✔

Accept other valid condition

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