Micro algae as Bio fuel production

1. ALGAE AS BIOFUELS
PRESENDED BY
P.SOWMIYA
I-MSC MICROBIOLOGY
VIVEKANANDHA ARTS AND SCIENCE COLLEGE FOR WOMEN
SANKAGIRI,SALEM ,TAMILNADU
VIVEKANANDHA ART’S AND SCIENCE COLLEGE FOR
WOMEN
Veerachipalayam, Sankagiri, Salem, Tamilnadu
MICROALGAL TECNNOLOGY
DEPARTMENT OF MICROBIOLOGY

2. AGENTA
Introduction
 Algae
 Biofuels
Algae selection
 Algae
cultivation
Algae harvesting
 oil extraction
Advantage
Disadvantage

3. INTRODUCTION OF ALGAE
 Algae have the pigment chlorophyll and hence they are capable of photosynthesis.
 Algae are mostly unicellular organisms appearing in a variety of shapes and sizes. They
may be prokaryotic or eukaryotic .
 They can reproduce sexually or asexually by cell division,sporulation,and
fragmentation.
 They are found in both freshwaters as well as saline water.
 They do not have a definite body structure.
 They are found in both freshwaters as well as saline water.

4. BIOFUELS
Biofuels are liquid fuels that have developed from other materials such as
plant or animal waste matter.
Biofuels is a solution to one of the challenges of solar, wind,
and other alternative energy sources
Biofuels are friendly to the environment because they reduce the risk of
global warming.
There is no emission of hazardous gases, such as Carbon monoxide
(CO) and sulphur oxide (SO).

5. Process of Biofuels Production

6. ALGAE SELECTION
Selection of Algal strain very important .
Some algaenaturally manufacture hydrocarbons that are sitable ashigh
energyfuels.
Botrycoccus braunii, acommon species, can contain more than 50%oil,
mostly in formof hydrocarbons.
Botryococcus braunii has great potential for algal culture because of the
hydrocarbons because of the hydrocarbons it produces,which
converted into fuels.

7. ALGAE SELECTION

8. ALGAECULTIVATION
 Algaecangrow20 to 30 timesfaster thanfood crops.
 It takes1to 10 daysfor growth
 The optimal temperature for microalgae growth ranges from 20˚C to 35˚C
algaegrowinpH rangesof 8.2to 8.7
 Therearetwo different typesofAlgaeareprovided
Open Pond Method
Closed Loop Method

9. OPEN POND METHOD
 Open-pond systems is a method for the cultivation of algae with
high-oil content.
Raceway ponds, usually lined with plastic or cement, are about 20
to 35cm deep to ensure adequate exposure to sunlight.
Paddlewheels provide motive force and keep the algae suspended
in the water.
The ponds are supplied with water and nutrients, and mature algae
are continuously removed at one end.

10. OPEN POND CULTURE

11. CLOSED LOOP METHOD
 A photobioreactor is a closed equipment which provides a controlled
environment and enableshighproductivityof algae.
 As it is a closed system, all growth requirements of algae are introduced into the
system and controlled according to the requirements. PBRs Provide better
control for cultureenvironment.
 Algea should need components such as carbon dioxide supply, water supply,
optimal temperature, efficient exposure to light, culture density, pH levels, gas
supplyrate,mixingregime,etc.

12. CLOSED LOOP METHOD

13. The Separating algaefrom its growingmediumis knownas
harvesting.
Microalgae can be harvestedusingfiltration, centrifugation,
flocculation or by froth flotation.
HARVESTING

14. OIL EXTRACTION

15. ADVANTAGES
Biofuel is made from renewable resources and is relatively less
flammable thanfossil diesel.
biofuels cost the same price in the market as Gasoline, although
their increasing demand could induce the need for more efficient
extraction methods,makingthem muchcheaperinthefuture.
Biofuels are adaptable to current engine designs and perform very
wellinmost conditions.
Most fossil fuelswill get exhausted and end up insmokeoneday.

16. DISADVANTAGE
It disturbsthelifecycle.
Cost of labour and it requireshugespacefor storage. More
water consumption,especiallyin dryclimates.
Growingbiomassfor biofuel production increases the
demandfor agricultural land.

17. CONCLUSION