Thesis biodiesel production

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Thesis biodiesel production

This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. October Learn how and when to remove this template message Most growers prefer monocultural production and go to considerable lengths to maintain the purity of their cultures.

However, the microbiological contaminants are still under investigation. Individual species cultures are also much needed for research purposes. A common method of obtaining pure cultures is serial dilution.

Cultivators dilute either a wild Thesis biodiesel production or a lab sample containing the desired algae with filtered water and introduce small aliquots measures of this solution into a large number of small growing containers. Dilution follows a microscopic examination of the source culture that predicts that a few of the growing containers contain a single cell of the desired species.

Following a suitable period on a light table, cultivators again use the microscope to identify Thesis biodiesel production to start larger cultures. Another approach is to use a special medium which excludes other organisms, including invasive algae.


For example, Dunaliella is a commonly grown genus of microalgae which flourishes in extremely salty water that few other organisms can tolerate. Alternatively, mixed algae cultures can work well for larval mollusks. First, the cultivator filters the sea water to remove algae which are too large for the larvae to eat.

Next, the cultivator adds nutrients and possibly aerates the result. After one or two days in a greenhouse or outdoors, the resulting thin soup of mixed algae is ready for the larvae.

An advantage of this method is low maintenance. Seaweed cultivator and Culture of microalgae in hatcheries Microalgae is used to culture brine shrimpwhich produce dormant eggs pictured.

Thesis biodiesel production

The eggs can then be hatched on demand and fed to cultured fish larvae and crustaceans. Water, carbon dioxideminerals and light are all important factors in cultivation, and different algae have different requirements.

It is also possible to grow certain types of algae without light, these types of algae consume sugars such as glucose. This is known as heterotrophic growth. As the algae grow and multiply, the culture becomes so dense that it blocks light from reaching deeper into the water.

To use deeper ponds, growers agitate the water, circulating the algae so that it does not remain on the surface. Paddle wheels can stir the water and compressed air coming from the bottom lifts algae from the lower regions. Agitation also helps prevent over-exposure to the sun.

Another means of supplying light is to place the light in the system. Glow plates made from sheets of plastic or glass and placed within the tank offer precise control over light intensity, and distribute it more evenly.

They are seldom used, however, due to high cost. Odor and oxygen[ edit ] The odor associated with bogsswampsindeed any stagnant waters, can be due to oxygen depletion caused by the decay of deceased algal blooms.

Under anoxic conditions, the bacteria inhabiting algae cultures break down the organic material and produce hydrogen sulfide and ammonia which causes the odor.

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This hypoxia often results in the death of aquatic animals. In a system where algae is intentionally cultivated, maintained, and harvested, neither eutrophication nor hypoxia are likely to occur.

Some living algae and bacteria, also produce odorous chemicals, particularly certain cyanobacteria previously classed as blue-green algae such as Anabaena. The most well-known of these odor-causing chemicals are MIB 2-methylisoborneol and geosmin.Chapter 2 Introduction to Biodiesel Production Introduction Biodiesel [1–5] is a liquid biofuel obtained by chemical processes from vegetable.

1 Waste Cooking Oil-to-Biodiesel Conversion for Space Heating Applications by Daniel J. Bruton A THESIS Submitted in partial fulfillment of the requirements.

The conventional biodiesel production involves a two-step process in which oil is first extracted from oil feedstock and then subjected to transesterification step.

Unfortunately, it is hard to extract oil from algae, making algae based biodiesel production very costly. In this thesis project, an innovative in situ direct transesterification. Making Algae Biodiesel at Home. One of the issues is that there are not too many books on the topic.

To get all the info you have to collect a dozen different books, from a dozen different and competing fields, some highly technical, and wade hip-deep into the land of the techno-jargon. Introduction. Vegetable oil can be used as diesel fuel just as it is, without being converted to biodiesel.

The downside is that straight vegetable oil (SVO) is much more viscous (thicker) than conventional diesel fuel or biodiesel, and it doesn't burn the same in the engine -- many studies have found that it can damage engines. Biodiesel has become more attractive recently because of its environmental benefits and the fact that it is made from renewable resources.

The cost of biodiesel, however, is the main hurdle to commercialization of the product.

Algaculture - Wikipedia