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ECONOMIC MICRO-ECONOMIC
USES OF ORGANISMS
ABBOTTS COLLEGE
ECONOMIC USES OF BACTERIA
2

Degrade herbicides



Neutralise toxic waste in
soil


Herbicides are chemicals
which kill weeds
Bacteria clean
contaminated groundwater
Eg oil and diesel
Synthesize riboflavin

One of the Vitamin B’s
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ECONOMIC USES OF BACTERIA
PAGE 2.14
4

Separate the fibres
of jute, hemp and
flax in the making of
ropes an sacks
Hemp fibre
Flax
ECONOMIC USES OF
BACTERIA
5

Biological pest control
 Eg
control of moth
caterpillars
 Replace pesticides
 Have no effects on
humans and most
other beneficial
insects
PAGE 2.14
ECONOMIC USES OF
BACTERIA
6

Decompose sewage
waste to harmless
sludge
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ECONOMIC USES OF
BACTERIA
8

Food
production
 Eg
making
cheese
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ECONOMIC USES OF
BACTERIA
10

Make probiotics


Dietary
supplements
which contain
beneficial
bacteria that will
assist digestion
Eg Lactobacillus
and Bifido
bacterium
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FOR REVISION
12

TEXTBOOK PAGE 2.14
LEARNING ACTIVITY 12: ECONOMIC USES OF
BACTERIA
ECONOMIC USES OF
ALGAE
PAGE 2.14
13

Seaweed extracts include:

Phycocolloids found in
algal cell walls have gelling
properties



Used as gelling agents in
food products eg instant
puddings and also in
cosmetics, medical drugs
and insecticides
Thickening and stabilizing
agents eg dairy products,
artificial dairy toppings and
canned pet food
To make agar plates used
in laboratories for culturing
bacteria
agar plate
ECONOMIC USES OF
ALGAE
14

Seaweed extracts include:
 Plant
growth regulators which control growth and
development of plants
 Iodine from kelp can be included in mineral salt
tablets
 Natural pigments can be used as an alternative to
chemical dyes and colouring agents
 Nutrient extracts used in plant fertilizers
ECONOMIC USES OF
ALGAE
Nori
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
Some seaweed is
cultivated as a crash
crop

Eg Nori used in Sushi
rolls

Excellent source of
minerals and vitamins

Freshly harvested kelp is
used to feed cultured
abalone

Nutritional supplements
can be made from
cultivated algae
kelp
abalone
ECONOMIC USES OF
ALGAE
16

Diatomaceous earth

A fine sediment from the
walls of dead diatoms



Used in toothpaste, sink
cleaners and polishes with
low abrasive properties
Crude oil and natural gas
are the remnants of
photosynthetic products of
ancient algae
Oil producing algae are
being grown as a potential
alternative to fossil fuels
ECONOMIC USES OF
ALGAE
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

Seaweeds have the potential to contribute to
sustainable employment opportunities and socioeconomic upliftment
South Africa has an advantage when it comes to
the marketing of seaweed and its products
because our coasts are pollution free and we
have a high biodiversity of seaweeds
FOR REVISION
18
TEXTBOOK PAGE 2.15
LEARNING ACTIVITY 13:
ECONOMIC USES OF ALGAE
ECONOMIC USES OF FUNGI
19


As a direct food
source eg mushrooms
For the production of
biological products
such as:



Alcohols
Plant growth
regulators for plant
and fruit development
Enzymes

Eg cellulases for
industrial use and
proteases – the active
ingredient of
detergents
proteases
ECONOMIC USES OF FUNGI
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
To produce drugs

Eg antibiotics to
fight bacterial and
fungal diseases –
penicillin
Penicillin is one of the most wellknown and widely used antibiotics
ECONOMIC USES OF FUNGI
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
To produce drugs
 Drugs
to control
haemorrhage after
birth eg ergometrine
 Drugs to control
colestrol levels and
ward off coronary
heart disease eg
statins
ECONOMIC USES OF FUNGI
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
For fermentation
processes
 In
the making of
yoghurt, maas,
bread, beer and
wine
FOR REVISION
23
TEXTBOOK PAGE 2.16
LEARNING ACTIVITY 16:
ECONOMIC USES OF FUNGI
24
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THE END