Control of zebra mussels in closed service water systems
AssigneeASI Group Ltd.
InventorCarmelo Sferrazza
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Abstract
A method for controlling bivalve growth in a static or semi-static service water system of a plant is disclosed. Upon detecting an increase in the concentration of veligers or settlement stage bivalves, potassium is introduced into the service water to obtain a potassium cation concentration of between 10 mg/l and 150 mg/l for a period of 2 to 30 days. The methods are particularly useful for controlling zebra mussel growth in service water systems for fire prevention.
Claims33
A method for controlling bivalve growth in a static or semi-static service water system wherein service water is drawn occasionally from a body of water and introduced into the service water system, the method comprising:
- a. monitoring the body of water for the presence of veligers and/or settlement stage bivalves;
- b. when an increase in the concentration of veligers and/or settlement stage bivalves is detected, introducing potassium cations into the service water system to obtain a steady state potassium cation concentration of 10 to 150 mg/l;
- and,
- c. maintaining the steady state concentration of potassium cation in the service water for at least 2 to 30 days.
A method for controlling bivalve growth in a static or semi-static service water system wherein service water is drawn occasionally from a body of water and introduced into the service water system, the method comprising:
- a. introducing potassium cation into the service water of the service water system at a concentration sufficiently high to kill early stage bivalves and sufficiently low such that the early stage bivalves continue to respire and ingest potassium;
- and,
- b. maintaining the concentration of potassium cation in the service water of the service water system for 2 to 30 days.
Dependencies are inferred from the claim text.