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Position: Home > Articles > Effect of additive amount of PCL on the nitrate-nitrogen removal in the recirculating aquaculture freshwater Fishery Modernization 2017 (5) 12-18

聚己内酯添加量对淡水养殖水体硝酸盐氮处理效果的影响

作  者：
侯志伟;高锦芳;罗国芝
关键词：
聚己内酯;固相反硝化;循环水养殖系统;硝酸盐氮
摘  要：
以可生物降解聚合物(Biological degradable polymers,BDPs)为有机碳源进行异养反硝化可以避免多次添加碳源、碳源不足或过量等问题。聚己内酯(Polycaprolactone,PCL)已被证明能够作为水产养殖用水异养反硝化的有机碳源。研究了聚己内酯添加量对水产养殖用水硝酸盐氮去除效率的影响。在进水硝酸盐氮(NO_3~--N)负荷为0.1 g/(L·d)条件下,200 m L水体中分别加入5 g、10 g、15 g、20 g、25 g和30 g的PCL颗粒进行反硝化,各组的NO_3~--N去除效率没有明显差异;出水中溶解有机碳的质量浓度随着PCL添加量的增加而增加;5 g组的PCL利用率明显高于其他组。结果显示:试验条件下,PCL添加量的增加并不会必然增加NO_3~--N的去除效率,反而会造成出水中溶解有机碳的增加;添加5 g PCL为最适添加量。
译  名：
Effect of additive amount of PCL on the nitrate-nitrogen removal in the recirculating aquaculture freshwater
作  者：
HOU Zhiwei;GAO Jinfang;LUO Guozhi;Research and Development Center of Aquacultural Engineering of Shanghai,Shanghai Ocean University;Shanghai Collaborative Innovation Center for Aquatic Animal Genetics and Breeding,National Demonstration Center for Experimental Fisheries Science Education;
单  位：
Research and Development Center of Aquacultural Engineering of Shanghai,Shanghai Ocean University%Shanghai Collaborative Innovation Center for Aquatic Animal Genetics and Breeding,National Demonstration Center for Experimental Fisheries Science Education
关键词：
Polycaprolactone;;solid phase denitrification;;recirculating aquaculture system;;nitrate-nitrogen
摘  要：
Multiple-time addition of carbon sources,and the shortages and overages of it can be avoided for a denitrification progress using biological degradable Polymers( BDPs) as organic carbon sources. It has been proven that Polycaprolactone( PCL) can act as organic carbon sources for the denitrification progress in the recirculating aquaculture freshwater. In this paper,the effect of additive amount of PCL on the nitrate-nitrogen removal in the recirculating aquaculture freshwater was studied. In a denitrification progress with a about 0.1 g/L load of nitrate nitrogen in the influent water,when the additive amount of PCL in a water body of 200 ml increased from 5 g,10 g,15 g,20 g,25 g and 30 g,the removal efficiency of nitrate-nitrogen for each group showed no significant difference,but the concentration of the unused dissolved organic carbon( DOC) increased with the increasing of the additive amount of PCL. It showed that the change of additive amount of PCL did not affect the removal efficiency of nitrate-nitrogen,but had a significant effect on the accumulation of unused dissolved organic carbon( DOC). In conclusion,5 g is the best suitable additive amount for PCL.

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