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Bioreactor Controls-II

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In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...

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Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...

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Biomass Conversion to Produce Hydrocarbon Liquid Fuel Via Hot-vapor Filtered Fast Pyrolysis and Catalytic Hydrotreating

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A data acquisition and control system based on the new Commodore PET microcomputer.

¹Bell Laboratories, Murray Hill, New Jersey 07974, USA.

The Review of Scientific Instruments

|September 1, 1979

Summary

A low-cost data acquisition and control system leverages personal computers for powerful lab applications. This adaptable system functions as a transient digitizer, analyzer, recorder, and controller, offering significant cost savings.

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Area of Science:

Computer Science
Electrical Engineering
Instrumentation

Background:

Traditional data acquisition systems are often expensive and complex.
The advent of low-cost personal computers presents an opportunity for more accessible instrumentation.

Purpose of the Study:

To develop a cost-effective data acquisition and control system.
To integrate personal computers into a versatile laboratory instrumentation platform.

Main Methods:

Utilized interfacing hardware and supporting software to connect personal computers.
Developed software to configure the system for various laboratory tasks.
Programmed functionalities including transient digitizer, multichannel analyzer, data fitter, recorder, and controller.

Main Results:

Created a powerful and adaptable data acquisition and control system.
Achieved a minimum of 12 microsec per channel for transient digitization.
The system demonstrated capabilities comparable to DEC-PDP 11/04 at a fraction of the cost.

Conclusions:

Personal computers can be effectively integrated into low-cost, high-performance data acquisition systems.
The developed system offers a versatile and economical solution for diverse laboratory needs.
This approach significantly reduces the financial barrier to advanced laboratory instrumentation.