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一、越冬前的准备 气温已近13℃时,就应勤放气,勤换水,并进行一次增氧消毒。具体操作方法如下: 1、放气换水 用钢钎向泥沟插放气孔,要求深插至底,每20cm一孔。待多数气孔无气泡窜起时,即放干全部池水,并用带柄密筛(60目)将整个池面筛上一薄层生石灰(施入量以池水中含量小于20ppm为度)。待干池48小时后,灌入处理水至泥埂顶部。灌入处理水后2小时再降低水位至10cm深浅。12小时后进行大流量流动换水1—2小时。
First, the pre-winter preparation temperature is near 13 ℃, it should be deflated ground, frequently changing the water, and conduct an aerobic disinfection. The specific methods of operation are as follows: 1, deflate the water with steel brazing plug hole to the muddy ditch, requiring deep plug in the end, a hole every 20cm. When most of the pores are free from air bubbles, drain all the water and sieve the whole surface with a thin layer of quicklime (60 mesh) (applied in an amount less than 20 ppm). 48 hours to be dry pool, poured into the treatment of water to the top of the mud. Two hours after filling the treated water, the water level is reduced to 10 cm. 12 hours after the large flow of water for 1-2 hours.