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How the flow pattern in clogging mechanism is achieved?

(a) By increasing the pressure

(b) By increasing the viscosity

(c) Bydecrease in microbial cell mass

(d) By increasing the cell mass of microbes

The question was asked in examination.

This intriguing question originated from Microbial Extraction of Petroleum in portion Bioleaching and Biomining for Recovery of Resources of Environmental Biotechnology

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The correct answer is (d) By increasing the cell mass of microbes

For explanation I would say: The increase in the cell mass of microbes affects the flow pattern by shifting the fluid flow from high permeability zones to low permeability zones in the reservoir. This stimulates the growth of microorganisms which increases the mechanism of microbial plugging.

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