Device for oxygenating sea water

Abstract

The present invention relates to a diffuser hose for oxygenation of water in aquaculture installations for marine organisms in the sea, together with a method for oxygenation of water. The invention provides for the supply of substantially pure oxygen, which is distributed via a more closely specified diffuser hose to the water. Diffuser hoses herein provide for the formation of oxygen microbubbles with an oxygen partial pressure that is such that the oxygen passes into the water in the fish farm. The distribution of oxygen is preferably regulated according to the water's oxygen saturation.

1 . A diffuser for oxygenating water by providing micro bubbles in aquaculture installations for marine organisms in the sea, wherein the diffuser is attached to an equipment for oxygen gas production and oxygen delivery, which optionally may be produced on the spot and stored in a suitable tank ( 4 ), wherein said diffuser is a hose ( 5 ) comprising a perforated supply hose ( 6 ) and at least a perforated distribution hose ( 7 ), and wherein the supply hose comprises fewer perforations/holes/pores than the distribution hose and wherein the perforations/holes/pores in the supply hose ( 6 ) are located along its circumference and in the longitudinal direction, or in a row/rank in the supply hose's ( 6 ) longitudinal direction, and wherein the perforations/holes/pores in the distribution hose ( 7 ) are located along its entire circumference and in the longitudinal direction, and wherein the supply hose ( 6 ) comprise constructions ( 8 ,  10 ) enabling chambers/sections in the cavity of the diffuser hose ( 5 ).  
     
     
         2 . The diffuser according to  claim 2 , 
 wherein the supply hose ( 6 ) and the distribution hose ( 7 ) are arranged coaxially.    
     
     
         3 . The diffuser according  claim 2 , 
 wherein the supply hose ( 6 ) has a rigid construction at special points ( 8 ), or along its entire length, thus enabling chambers/sections to be formed in the distributions hose ( 7 ) by means of an external tightening ring ( 9 ).    
     
     
         4 . The diffuser according to  claim 3 , 
 wherein the chambers/sections are formed in the distribution hose ( 7 ) by being blocked at certain intervals by means of fixed partitions ( 10 ), and/or by means of an external tightening ring ( 9 ), which is fixed/sealed around a rigid, internal pipe ( 11 ).    
     
     
         5 . The diffuser according to  claim 4 , 
 wherein the second hose ( 7 ) is tightened/blocked thus forming chambers/sections once per 1 to 50 metre.    
     
     
         6 . The diffuser according to  claim 5 , 
 wherein the supply hose ( 6 ) in its longitudinal direction comprises 1-100 perforations/holes/pores per metre, and the distribution hose ( 7 ) in its longitudinal direction comprises 200-10000 perforations/holes/pores per metre.    
     
     
         7 . The diffuser according to the  claim 6 , 
 wherein the diffuser hose is connected to oxygen probes/sensors ( 14 ) for registering the oxygen level in the water and a regulating unit/control cabinet ( 15 ) for regulation/controlling the oxygen supply from the tank ( 4 ) based on the information registered by the oxygen probe(s)/sensor(s).    
     
     
         8 . The diffuser according to the  claim 7 , 
 wherein the oxygen admixture is controlled/regulated according to the oxygen saturation in the water that has to be oxygenated or a more closely specified adjustment point/set point.    
     
     
         9 . The diffuser according to  claim 8 , 
 wherein the oxygen that is provided is liquid oxygen from a cryotank(s).    
     
     
         10 . The diffuser according to  claim 9 , 
 wherein the supply hose ( 6 ) consists of 4-16 mm rubber, and that the distribution hose ( 7 ) consists of 6-30 mm rubber.    
     
     
         11 . The diffuser according to  claim 10 , 
 wherein the diffusor hose ( 5 ) is from 0.5-2000 metres.    
     
     
         12 . The diffuser according to  claim 11 , 
 wherein one or more diffuser hoses ( 5 ) are mounted on an attachment device ( 12 ).    
     
     
         13 . The diffuser according to  claim 12 , 
 wherein several diffuser hoses ( 5 ) are mounted in a network on the attachment device ( 12 ) so as to form separate modules.    
     
     
         14 . The diffuser according to  claim 13 , 
 wherein several attachment devices ( 12 ) can be interconnected.    
     
     
         15 . The diffuser according to  claim 4 , 
 wherein the second hose ( 7 ) is tightened/blocked thus forming chambers/sections once per 2 to 10 metre.    
     
     
         16 . The diffuser according to  claim 5 , 
 wherein the supply hose ( 6 ) in its longitudinal direction comprises 1-10 perforations/holes/pores per metre, and the distribution hose ( 7 ) in its longitudinal direction comprises 500-2000 perforations/holes/pores per metre.    
     
     
         17 . The diffuser according to  claim 10 , 
 wherein said rubber of the supply hose ( 6 ) and the distribution hose ( 7 ) is EPDM.    
     
     
         18 . The diffuser according to  claim 11 , 
 wherein the diffusor hose ( 5 ) is from 1-1000 metres.    
     
     
         19 . The diffuser according to  claim 12 , 
 wherein the diffusor hose ( 5 ) is from 10-100 metres.    
     
     
         20 . A method for oxygenating water in aquaculture installations for marine organisms, wherein substantially pure oxygen in the form of oxygen-rich micro bubbles is added to the installation, and wherein the oxygen is supplied and distributed in the water through a diffuser(s), said diffuser(s) being chosen from the group consisting of the devices according to  claim 1 .  
     
     
         21 . The method according to  claim 20 , 
 wherein the amount of oxygen added at any time is regulated and controlled by means of a control device ( 15 ) for regulating/controlling the oxygen admixture from the source ( 4 ), wherein the regulation is based on measurement of the water's oxygen content by means of oxygen probe(s) ( 14 ).    
     
     
         22 . The method according to  claim 21 , 
 wherein the oxygen admixture is controlled/regulated according to the oxygen saturation in the water that has to be oxygenated or a more closely specified adjustment point/set point.    
     
     
         23 . The method according to  claim 22 , 
 wherein the hoses ( 5 ) employed are mounted on an attachment device ( 12 ) suited to the purpose.    
     
     
         24 . The method according to  claim 23 , 
 wherein the attachment device ( 12 ) with hose(s) ( 5 ), by means of an adjustable suspension means, is placed at depths from 2-25 metres.    
     
     
         25 . The method according to  claim 24 , 
 wherein an oxygen saturation is obtained in the water that is in accordance with the aquaculture organism's needs.