| 摘要 |
<p>Rain water on highways is collected in drainage structures, before discharge elsewhere, and is initially collected in a sump structure such as a gully pot (12) to trap sediment. The water in such a gully pot (12) may be contaminated with organic materials such as oil, petrol, or rubber from vehicle tyres. A device (26, 28) is therefore provided within the gully pot (12) to enhance natural biodegradation processes, that is to say, to achieve bioremediation. Lack of oxygen is often a limiting factor, and in this case the device would provide oxygen to the water, for example comprising a canister (26) containing solid magnesium peroxide (34) which gradually releases oxygen into the water.</p> |
