The immense diversity and metabolic versatility of microorganisms are beginning to be exploited in an ever-increasing number of industrial applications. The advantages of using microorganisms, as outlined below, are manifold, but unless bio-industrial processes are competitive with traditional methods their potential will not be realised. By using new and exciting techniques to manipulate genes, natural diversity can be extended to increase yield, rate and specificity, thereby making reactions more efficient and economical. The drive towards sustainable development has led to a green revolution in chemistry. Microbial transformations require milder conditions than chemically catalysed reactions and are more specific, resulting in cleaner, greener processes. Renewable raw materials, and even waste products, can be worked by microorganisms to create useful products ranging from fuels to food supplements, reducing reliance on non-sustainable, petroleum-based products. Moreover, biotransformations can result in stereo- and regio-selective products, which are becoming a prerequisite for the manufacture of pharmaceuticals and other so-called 'fine chemicals'.
Some microbial products, such as bioadhesives and biopolymers, are biodegradable, which not only serves to protect the environment, but also improves targeted drug delivery. From using Bacillus species as templates for silicone nano-devices to the employment of bacteriorhodopsin as an information storage device, even the computer industry cannot escape the impact of microorganisms.
In this module, we will cover microbial biodiversity and how to access it, e.g. using metagenomics. We will consider the principles of enzymatic reactions and state-of-the-art approaches being used to improve them. We will examine the evolution of techniques to enhance metabolite yield and diversity, using metabolic pathway engineering and systems biology approaches. We will consider diverse examples in which biology has been exploited to make useful products, ranging from pharmaceuticals, vitamins, amino acids, biofuels, electricity, biomaterials and nano-products.
LEARNING OUTCOMES:
1. understand the fundamental mechanisms that underpin industrial biotechnology;
2. explain the importance of biological diversity, and the approaches used to enhance natural diversity in order to create new products;
3. illustrate the advantages (and disadvantages) of biological compared with traditional chemical processes;
4. describe how multi-disciplinary approaches are resulting in new processes and hybrid materials;
5. outline the main applications of biotechnology in industry, focusing on novel technologies.