鱼摄饵后排出粪尿 ,由此引起的环境负荷在密度低的自然界可通过河川的自净予以吸收。但养殖场中的高密度条件下 ,由于期望短时增重而大量投饵 ,由此产生很大的环境负荷 ,只有通过大量换水将其转移出去。为此作为其改善对策 ,回收鱼粪的固形物十分重要。1　污浊负荷物质养殖环境 After the bait is discharged, the manure is excreted, and the resulting environmental load can be absorbed by the river’s self-purification in the low-density nature. However, under high-density conditions in farms, large amounts of feed are expected due to short-term weight gain, resulting in large environmental loads that can be diverted only by extensive water changes. Therefore, as a countermeasure for its improvement, it is very important to recover the solid content of fish manure. 1 dirty load material breeding environment