【摘要】 采用一套自主开发研制的加压溶气气浮装置,对养殖水体中的微颗粒进行净化。选取液位高度、液体流量、溶气压力进行单因子试验和正交试验,单因子试验结果表明,液位0.8 m具有浊度去除的最佳效果;液位1.0 m对浊度去除率和pH的增加率的影响较显著;液体流量为400~600 L/h时,浊度去除率最大;液体流量为200~400 L/h时,溶解氧和pH增加率最大;溶气压力为0.5 MPa时,浊度的去除率达到了最大值的72%,同时,pH的增加率也达到了最大值,溶气压力为0.4 MPa时,溶解氧的增加率达到了最大值;通过正交试验得到三因素的最优组合为:液位高度1.0 m、液体流量200~400 L/h、溶气压力0.4 MPa。更多还原

【Abstract】 A dissolved micro-bubble flotation system was established and studied for the purification of fine solids in recirculating aquaculture system.Liquid height,liquid flow rate and air dissolved pressure were selected for carrying in single-parameter experiments and orthogonal experiments.The results showed that the removal of turbidity was the highest when liquid height was kept at 0.8 m,while the increasing in pH was found at a liquid height of 1.0 m.On the other hand,turbidity removal increased at a liquid flow rate of 400~600 L/h,and be beneficial to pH and dissolved oxygen(DO) at 200~400 L/h.Air dissolved pressure also had a significant influence on water quality.Turbidity removal and maximum in pH achieved at an air dissolved pressure of 0.5 MPa,while DO increased fast at 0.4 MPa.The results of orthogonal experiments indicated that it was optimal to the water quality if the liquid height,liquid flow rate and air dissolved pressure were controlled simultaneously at 1.0 m,200~400 L/h and 0.4 MPa,respectively.更多还原