| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a circulating apparatus for a culture pond being able to dry a sludge such as residual feed or feces generated in a fish or shellfish culture pond without generating moldor, improving antimicrobial activity of the culture water, preventing disease of the fish and shellfish without polluting the culture pond, being applied easily to every pond from small to large scale, and capable of automation. SOLUTION: The circulating apparatus for a culture pond 1 comprises a solid-liquid separation tank 4 for solid-liquid separation by introducing waste liquid containing solids in the culture pond 1 for fish and shell fish, a biologically filtrating tank 6 for introducing the waste liquid separated in the solid-liquid separation tank 4 and absorption-removing organic substances in the waste liquid by utilizing useful microbes to filtrate the waste liquid and an oxygen- feeding means 10 for mixing oxygen into treated liquid flowed through the biologically filtrating tank 6 and returning the same to the culture pond 1. In this case, the inside of the biologically filtrating tank 6 is packed with solid molded body 601 composed mainly of humus and carriers 602, and has a back washing means by clean water, and a returning means for returning the back washed waste water to the solid-liquid separation tank 4.</p> |
