Concept explainers
To explain:
What type of microbial blooms might be triggered if the sewage plant releasing sewage containing high levels of ammonia, phosphate and very low levels of organic carbon. How would the graphs of oxygen beyond and near the plant’s release point vary from the graph?
Concept introduction:
A type of waste water that generated by the community of individual is called as the sewage. It is also called as domestic waste water or municipal waste water. It is indicated by the rate of flow or volume, chemical, toxic constituents and physical condition. Mostly the sewage consists of human waste, detergents and soaps.
Explanation of Solution
The release of very low levels of organic carbon, high levels of phosphate and ammonia from a sewage treatment plant would activate the growth of cyanobacteria, algae and nitrifying the bacteria that will oxidize ammonium (NH4+) to NO3+. The graph of oxygen shows difference that decrease nearby the outflow due to the presence of small organic carbon and the organism which respires aerobically would not consume it at a comparable amount.
Further, the cyanobacteria and blooms are contributing to increase the dissolved oxygen levels nearby the release point of the sewage due to oxygenic photosynthesis. However, the initial blooms of cyanobacteria and algae has finally results in decreased dissolved oxygen. Because the phototrophs mass start to decompose and die by the aerobic bacteria which will consume the oxygen present in the water.
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Chapter 20 Solutions
Brock Biology of Microorganisms (15th Edition)
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