DEPARTMENT OF CHEMICAL ENGINEERING

BIOCHEMICAL ENGINEERING

PRESENTATION TOPIC:

MICRO ORGANISMS,TYPES AND THEIR GROWTHASSIGNED BY: DR AZIZA AFTAB ASS: PROFESSOR DEPARTMENT OF CHEMICAL ENGINEERING MUET JAMSHORO

PRESENTED BY: RAHAT INAYAT ALI 14CH23

CONTENTS OF PRESENTATION:

▪ OBJECTIVES▪ INTRODUCTION TO SUBJECT▪ MICRO ORGANISMS▪ TYPES OF MICRO ORGANISMS▪ GROWTH OF MICRO ORGANISMS▪ CONCLUSION▪ REFERANCES

OBJECTIVES:

1: WHAT DO WE MEAN BY MICRO ORGANISMS?

2: WHICH ARE THE TYPES OF MICRO ORGANISMS?

3: HOW THE MICRO ORGANISMS GROW?

INTRODUCTION TO SUBJECT:

Biochemical engineering is a branch of chemical engineering that mainly deals with the design and construction of unit processes that involve biological organisms or molecules, such as bioreactors.Its applications are in the petrochemical industry, food, pharmaceutical, biotechnology, and water treatment industries.

MICRO ORGANISMS:A microorganism or microbe is a microscopic living organism, which may be single-celled or multicellular. The study of microorganisms is called microbiology a subject that began with the discovery of microorganisms in 1674 by Antonie van Leeuwenhoek, using a microscope.

HISTORY AND IMPORTANCE:Single-celled microorganisms were the first forms of life to develop on Earth, approximately 3–4 billion years ago. Further evolution was slow, and for about 3 billion years in the History, all organisms were microscopic. So, for most of the history of life on Earth, the only forms of life were microorganismsMicroorganisms are vital to humans and the environment, as they participate in the carbon and nitrogen cycles, as well as fulfilling other vital roles in virtually all ecosystems, such as recycling other organisms' dead remains and waste products through decomposition. Microorganisms also have an important place in most higher-order multicellular organisms as symbionts.

TYPES OF MICRO ORGANISMS:THERE ARE TWO MAIN CLASSES OF MICRO ORGANISMS WHICH ARE FURTHER CLASSIFIED INTO DIFFERENT TYPES:

PROKARYOTES:• BACTERIA• ARCHAEA

EUKARYOTES:• ALGAE• FUNGUS• PROTOZO

A

1: BACTERIABacteria are unicellular organisms The cells are described as prokaryotic because they lack a nucleus.They exist in four major shapes: bacillus (rod shape), coccus (spherical shape), spirilla (spiral shape), and vibrio (curved shape). Bacteria can be further divided based on their response to gaseous oxygen into the following groups: aerobic (living in the presence of oxygen), anaerobic (living without oxygen), and facultative anaerobes (can live in both environments).

2: ALCHAEAArchaea differ from true bacteria in their cell wall structure and lack peptidoglycans. They are prokaryotic cells with avidity to extreme environmental conditions.Based on their habitat, all Archaeans can be divided into the following groups: methanogens (methane-producing organisms), halophiles (archaeans that live in salty environments), thermophiles (archaeans that live at extremely hot temperatures), and psychrophiles (cold-temperature Archaeans).

3: ALGAEAlgae, also called cyanobacteria or blue-green algae, are unicellular or multicellular eukaryotes that obtain nourishment by photosynthesis. They live in water, damp soil, and rocks and produce oxygen and carbohydrates used by other organisms.

Algae fuel or algal biofuel is an alternative to liquid fossil fuels that uses algae as its source of energy-rich oils.Several companies and government agencies are funding efforts to reduce capital and operating costs and make algae fuel production commercially viable.

4: FUNGUSA fungus is any member of the group of eukaryotic organisms that includes unicellular microorganisms such as yeasts and molds, as well as multicellular fungi that produce familiar fruiting forms known as mushrooms. These organisms are classified as a kingdom, Fungi, which is separate from the other eukaryotic life kingdoms of plants and animals.They obtain nutrients by absorbing organic material from their environment (decomposers), through symbiotic relationships with plants (symbionts), or harmful relationships with a host (parasites).

5: PROTOZOAProtozoa are unicellular aerobic eukaryotes. They have a nucleus, complex organelles, and obtain nourishment by absorption or ingestion through specialized structures. They make up the largest group of organisms in the world in terms of numbers, biomass, and diversity. Their cell walls are made up of cellulose. Protozoa have been traditionally divided based on their mode of locomotion: flagellates produce their own food and use their whip-like structure to propel forward, ciliates have tiny hair that beat to produce movement, amoeboids have false feet or pseudopodia used for feeding and locomotion, and sporozoans are non-motile.

GROWTH OF MICRO ORGANISMS:The growth of microorganisms is a highly complex and coordinated process, ultimately expressed by increase in cell number or cell mass. The process of growth depends on the availability of requisite nutrients and their transport into the cells, and the environmental factors such as aeration, O2 supply, temperature and pH.

CONTINUED:Doubling time refers to the time period required for doubling the weight of the biomass while generation time represents the period for doubling the cell numbers. Doubling times normally increase with increasing cell size and complicity as given below.

Bacteria 0.30 – 1 hourYeasts 1 – 2 hoursAnimal cells 25 -48 hoursPlant cells 20 -70 hours

In general, when all other conditions are kept ideal, growth of the microorganisms is dependent on the substrate (nutrient) supply. The microorganisms can be grown in batch, fed-batch, semi-continuous or continuous culture systems in a bioreactor.

CONCLUSION:Microorganisms are important because they play a key role in many processes that involve human life and health. Microorganisms are present in nature as well as in synthetically produced products designed to improve life like medicine ,fuel and food production.

REFERANCES:• https://en.wikipedia.org/

• http://www.biologydiscussion.com/

• https://www.boundless.com/