| 摘要 |
PCT No. PCT/EP82/00193 Sec. 371 Date May 9, 1983 Sec. 102(e) Date May 9, 1983 PCT Filed Sep. 4, 1982 PCT Pub. No. WO83/00798 PCT Pub. Date Mar. 17, 1983.A tank filled with water and appropriate to receive such aquatic organisms, comprises a support bottom (1) under the water surface, presenting on the fresh water side in circulation, shelter holes shaped as pipes (3), wherein the aquatic organisms lives according to their natural way of life. Such shelters (3), adapted to the way of life of eels, have their upper opening (5) orientated in the fresh water stream (13) and extend inclined downwardly. To the contrary, for the breving of crustacea, those aquatic shelters extend horizontally from the fresh water compartment. A water stream (15) passes through such aquatic shelters between the fresh water compartment and the residual water compartment (25); said water stream entrains from the pipes (3) towards the residual water compartment excrements, food remains and other waste. The device may be provided with a heating elements allowing to use for the heating, by means of special bottom arrangements, slightly dirty waste waters as well as very dirty waste waters. |
