鳖喜在沙中栖息和隐蔽,故国内外温室养鳖均在池底铺沙。可是,沙很易被鳖粪和残饲污染,且不易清洗干净。严重时,底沙发黑、发臭,并导致池水发黑、发臭。据测定,污水的溶氧量可降到“零”,铵态氮含量则高达150毫克/千克以上。这样,对鳖的健康、正常生长与肉质均会产生不良影响。传统法只能用增氧以及勤换水和适时冲洗脏沙(或及时换新沙)等方法来解决这个问题。这样,不仅耗温水(30℃)很多,而且工作量和劳动强度也很大。 Soft-shelled turtle habitat and hidden in the sand, so domestic and international greenhouse turtle are in the bottom of the sand. However, sand is very easy to be turtle feces and residual pollution, and not easy to clean. Seriously, the bottom sand black, smelly, and lead to black water, smelly. It is determined that the dissolved oxygen of sewage can be reduced to “zero”, ammonium nitrogen content is as high as 150 mg / kg or more. In this way, the health of turtles, normal growth and meat quality will have a negative impact. The traditional method can only solve this problem by using oxygenation, changing water frequently, and flushing dirty sand in time (or changing sand in time). In this way, not only consume warm water (30 ℃) a lot, but also workload and labor intensity is also great.