Microorganisms play a crucial role in wastewater treatment by transforming solid organic matter into carbon dioxide and water In a wastewater treatment system, the solids retention time is average amount of time that solid organic matter resides in the treatment tank. A study was performed at the Colorado School of Mines to determine the relationship between the solids retention time and the diversity of the microorganism population. It was thought, because microorganisms feed on the solid matter, that longer retention times would provide more opportunity for genetic mutations to occur, resulting in a greater diversity of microorganisms.
Following are counts of the numbers of species of microorganism for retention times of 3 days, 12 days, and 30 days.
Can you conclude at the
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