Browse Publications Technical Papers 2000-01-2470
2000-07-10

Management of the Physical / Chemical Parameters of Solid Biomass Degradation Using a Data Acquisition System 2000-01-2470

An automated Data Acquisition System (DAS) for managing and controlling an aerobic biodegradation process of solid biomass has been developed. The system employs a personal computer equipped with a data acquisition card and a visual basic software (LabVIEW). The DAS was integrated with the physical / chemical hardware (a bioreactor with its auxiliary equipment) through the necessary sensing devices. These sensing devices include in-line electrical-conductivity (EC), pH, and temperature probes. A flow sensor was inserted in the circulating sampling line to ensure that the in-line manifold does not contain air bubbles or clogged with fine particles. A gas analyzer was used to sample off-gases from the bioreactor to measure and record the change in the CO2 and O2 levels. The data acquisition system is capable of controlling the pH level inside the bioreactor by activating acid or base metering pumps. A safety electronic circuit was designed and used in conjunction with the data acquisition system to prevent operational abnormalities such as subsystem failure and/or power failure. The integrated system was tested using sweetpotato biomass for various biodegradation cycles ranging from one week to seven weeks. It was found that the system performs successfully over a long duration of time with minimum human interference.

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