| 摘要 |
<p>An improved polyurethane foam having significantly improved longevity is used in a microbiological process in which the foam functions as a support medium for microorganism in a water system containing nutrients for the microorganisms. Also an improved microbiological metabolizing (e.g., digestion) process employing the improved foam is used in waste water treatment. The invention is based on the discovery that enhanced foam life in such a watery, abrasive environment is substantially enhanced if the polyurethane foam formulation has a urea/urethane ratio of less than about 5 and preferably a urethane index of about 100.</p> |
