Kinetic and dynamic study of biodegradation of dual substrates PCP and glucose by a mixed culture /
It is very important to understand the interactions among
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| Format: | Thesis Book |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1997.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=739892201&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | It is very important to understand the interactions among different substrates in practical wastewater treatment. In this study, a kinetic model based on Monod and Haldane equations was proposed and found to be appropriate to describe the interaction between biogenic compound glucose and inhibitory compound pentachlorophenol (PCP). A mixed culture of microorganisms was acclimated to degrade PCP and glucose. Concurrent utilization of the dual substrates was observed in the experiments. It was found that PCP inhibited glucose utilization by increasing the saturation constant Kg and decreasing the maximum specific growth rate []. There was a short initial lag period for PCP utilization when glucose was present, but the overall PCP degradation was enhanced because glucose supported higher biomass concentrations. During the continuous experiments, it was found that glucose removal was quite stable. However, dilution rate had a significant effect on PCP removal. The proposed model was moderately accurate for predicting effluent glucose and PCP concentrations especially at lower dilution rates. In the transient state operations, model predictions were appropriate in the first 10 hours but showed a faster return to the steady state than the experimental data. Stability analysis showed most of the operating conditions in the experiment were stable (damped oscillations) which is practical and reasonable in wastewater treatment. |
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| Item Description: | Vita. "Major Subject: Agricultural Engineering". |
| Physical Description: | xii, 107 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilms Inc. |
| Bibliography: | Includes bibliographical references: pages 95-99. |