Carbon dioxide


Source: Adapted from Metcalf and Eddy, Inc., 1991, Wastewater engineering: Treatment, disposal, and reuse, 3d ed., (New York: McGraw-Hill). Note: *Also known as anoxic denitrification.

by microorganisms involves the completeness of the resulting reaction and therefore the amount of energy available for cell growth and maintenance. Aerobes and facultative microorganisms completely oxidize the electron donors, while anaerobes, sometimes referred to as fermenters, do not. Table 7.22.3 gives some typical electron acceptors.

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