| 摘要 |
This invention relates to a protein skimmer for use in purification of water by culture of fish or orther water organisms in a reservoir, aquarium or (2) with a circulation system comprising one or more discharge tubes (4) for water from the reservoir (2) to a pump (5) for circulation of the water, and a return tube (3) for water directly or indirectly from the pump (5) to the reservoir (2). The protein skimmer is characterized in that the return tube (3) comprises at least one generally horizontal, straight portion (90) having one or more upwardly directed side branches (9) which has an opening (91) leading to air, in which the generally horizontal straight portion (90) is arranged for rapid passage of the water past the side branch (9) and to have the water level at or above the intersection of the side branch (9) with the straight portion (90), and in which the side branch (9) is directed rearward relative to the direction of the water flow in the straight portion (90), and forms a first angle (v) with between 0~ and about 90~ with the straight portion (90). During water flow a protein foam will be formed at the water surface at the intersection of the side branch (9) with the straight portion (90) of the return tube (3), and that the protein foam is allowed to grow upwardly from the water surface for discharge through the side branch (9). The return tube (3) is further arranged for having the entirely or partially purified water to flow further through the straight portion (90) and back directly or indirectly to the reservoir (2). The invention further relates to a process for purification of water by culture of fish or other organisms in a reservoir (2), by means of a protein skimmer.
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