| Popis: |
A study was conducted to investigate the feasibility of using microbiological processes to mitigate hazardous material spills in watercourses. A literature search, screening tests, laboratory-scale tests, and small-scale, simulated spill tests were conducted. Objectives were to (1) identify microorganisms capable of degrading selected hazardous materials, (2) identify their growth requirements and environmental factors affecting them, (3) determine the fate of selected hazardous materials in water, sediment, and biota, (4) develop methods for production, storage, reculture, and deployment, (5) investigate response requirements, and (6) evaluate the feasibility of biological countermeasures. Study results showed that microorganisms can effectively remove certain hazardous materials since most significant ones are biodegradable. Potentially harmful secondary effects should be minor since microorganisms are a natural part of the aquatic environment. Furthermore, pathogenic bacteria are not likely to constitute a significant part (if any) of the countermeasure, and noxious sludges should not persist because the microorganisms should oxidize themselves following consumption of the hazardous material. |
