Catabolically active microorganism

Microorganisms must exist, which have the needed catabolic activity and ability to transform the contaminant at a reasonable rate, reducing the contaminant concentration to levels that meet regulatory standards. 

Microorganisms must exist that have the needed catabolic activity (i.e., capacity to degrade organic matter)... 

Aerobic and anaerobic catabolic activities of heterotrophic microorganisms. 

List all inorganic and organic electron acceptors and show the relationship between redox potential and use of electron acceptors during catabolic activities of microorganisms. 

COj/Oj in the Off-Gas CO2 evolution from a bioreactor is closely related to the physiological state and the activity of microorganisms in a bioreactor because CO, evolves as a result of catabolism and respiration by microorganisms or cells. Therefore, it is helpful to measure the content of CO2/O2 in the exhaust gas in order to understand the physiological climate of a bioreactor. The CO2 and O2 content in the exhaust gas are taken from the streamline and analyzed by infrared spectrophotometer (CO2) and galvanic cell probe (O,). The wet off-gas must be desiccated before being introduced into the gas analyzer. 

Acquisition of new metabolic activities by microorganisms has been studied deliberately since the early 1960s. Most of those studies, many of which are reviewed in detail in Mortlock,1 were conducted using well-characterized laboratory strains of Escherichia coli, Klebsiella, or Pseudomonas aeruginosa and were intended to provide insights into evolutionary processes. In most cases the new activities were catabolic functions simply because the organisms in question were already capable of all required anabolic functions. There is no reason, however, why the methods outlined below should not be applicable to isolation of mutants with novel biosynthetic capabilities, provided that a sufficiently strong selection for those capabilities can be devised. The purpose of this chapter is to provide some... 

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