Table 7222 General Classification Of Microorganisms By Sources Of Energy And Carbon


Energy Source

Carbon Source


Photoautotrophic Chemoautotrophic Heterotrophic:

Photoheterotrophic Chemoheterotrophic

Light Carbon dioxide

Inorganic oxidation-reduction reactions Carbon dioxide

Light Organic carbon

Organic oxidation-reduction reactions Organic carbon

Source: Adapted from Metcalf and Eddy, Inc., 1991, Wastewater engineering: Treatment, disposal, and reuse, 3d ed., (New York: McGraw-Hill).

ganism to the next, but they fall within one of the following three categories: (1) amino acids, (2) purines and pyrimidines, and (3) vitamins (Metcalf and Eddy, Inc. 1991).

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