A microorganism is a microscopic living organism composed of a single cell or a colony of cells. Microorganisms include bacteria, viruses, fungi, algae, and protozoa, many of which can be found in various environments such as soil, water, air, and living organisms.
In pharmaceutical water treatment, microorganisms are undesirable as they pose potential contaminants and can affect the quality of the final product. The presence of microorganisms in water can lead to microbial contamination of pharmaceuticals, resulting in production downtime and quality issues.