Capture Of Air And Gas Bubbles But No Foam

Some bacteria in the activated sludge process are capable of capturing air and gas bubbles, but they do not produce foam. For example, aerobic Acetobacter synthe-

FIGURE 20.8 Globular or amorphous Zoogloeal growth.

sizes cellulose. When strands of cellulose build on the cellular surface, they form a mat that captures air and gas bubbles and keeps the Acetobacter afloat near the surface of the wastewater where oxygen is most concentrated.

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