BIOL 261 Chapter : Chapter 35 Study Questions
15 Mar 2019
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Coliform: gram-negative rod, enteric bacteria found in the colon. They are called indicator organisms because they are widely used indicator for contamination in water. Test for coliforms: most-probable-number (mpn) procedure, membrane filter (mf) procedure. Wastewater treatment relies on industrial-scale use of microbes in bioconversion. The goal is reduce organic and inorganic materials in wastewater to a level that no longer supports microbial growth and to eliminate other potentially toxic materials. The efficiency of the test is expressed in terms of a reduction in the biochemical. Involves bacteria use the carbon in the water to break it down to carbon dioxide and water. Part of the process involved anaerobic bacteria that are in sludge digesters. There are also aerobic bacteria involved in the secondary treatment. Some of the organisms are in the water and other are attached to rocks and the water trickles over the rocks. The bacteria form a biofilm and breakdown the organic matter as it trickles over them.
