Water treatment method and water treatment apparatus
AssigneeYokogawa Electric Corporation
InventorYasuhiro Matsui
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Abstract
A water treatment method includes a microbubble generating step (S101) of generating microbubbles in water to be treated containing at least calcium ions and producing water to be treated containing microbubbles, a water softening step (S102) of crystallizing calcium ions contained in the water to be treated containing the microbubbles as calcium carbonate and removing the calcium carbonate, and a reverse osmosis membrane treatment step (S103) of separating the water to be treated, from which the calcium carbonate has been removed, into reverse osmosis membrane treated water and reverse osmosis membrane concentrated water using a reverse osmosis membrane.
Claims20
A water treatment method comprising:
- a microbubble generating step of generating microbubbles in water to be treated containing at least calcium ions and producing water to be treated containing microbubbles;
- a water softening step of crystallizing calcium ions contained in the water to be treated containing the microbubbles as calcium carbonate and removing the calcium carbonate;
- and
- a reverse osmosis membrane treatment step of separating the water to be treated, from which the calcium carbonate has been removed, into reverse osmosis membrane treated water and reverse osmosis membrane concentrated water using a reverse osmosis membrane.
A water treatment apparatus comprising:
- a microbubble generating apparatus configured to generate microbubbles in water to be treated containing at least calcium ions and produce water to be treated containing microbubbles;
- a crystallization apparatus configured to crystallize calcium ions contained in the water to be treated containing the microbubbles as calcium carbonate and remove the calcium carbonate;
- and
- a reverse osmosis membrane treatment apparatus configured to separate the water to be treated, from which the calcium carbonate has been removed, into reverse osmosis membrane treated water and reverse osmosis membrane concentrated water using a reverse osmosis membrane.
The water treatment apparatus according to claim 12, further comprising:
- a pH adjuster configured to adjust a pH of the water to be treated containing the at least calcium ions supplied to the microbubble generating apparatus to 9 or more.
Dependencies are inferred from the claim text.