| 摘要 |
<p>Apparatus for delivering a water treatment chemical to a water intake in a water system is disclosed. The water system has a water inlet and a pump for withdrawi ng water from a natural body of water, such as an underground aquifer, a river, a l ake or the like. In a water system that draws water from a body of water that is inhabited by zebra mussels, the apparatus is operable, when water is being drawn into the system, t o deliver a zebra mussel control agent to the inlet of the system to eliminate zebra musse ls, if present, from the water system and to prevent the infestation of the water syste m by zebra mussels. In a water system that draws water from an underground aquifer, the app aratus is operable, when the system is drawing water, to deliver a water treatment chem ical to or near the water inlet for the system and to cause thorough mixing of the water treatment chemical with the water, before it reaches a reservoir in the system, whereby un desired impurities are controlled or removed from the water. When the system is not draw ing water, the apparatus is operable to prevent the discharge of the water treatment chemical.</p> |
