渔业现代化

渔业现代化

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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

侯志伟1，高锦芳1，罗国芝1,2（1上海水产养殖工程技术中心（上海海洋大学）, 上海 201306;
 2 农业部淡水水产种质资源重点实验室，水产科学国际级实验教学示范中心（上海海洋大学），上海 201306）   

  1. （1上海水产养殖工程技术中心（上海海洋大学）, 上海 201306;
     2 农业部淡水水产种质资源重点实验室，水产科学国际级实验教学示范中心（上海海洋大学），上海 201306）
     
  • 出版日期:2017-10-20 发布日期:2022-09-26
  • 通讯作者: 罗国芝(1974—)，女，教授，博士，研究方向：循环水养殖系统与工程。E-mail: gzhluo@shou.edu.cn
  • 作者简介:侯志伟(1993—)，男，硕士，研究方向：循环水养殖和水处理。E-mail：houzw2016@163.com
  • 基金资助:
    上海水产养殖工程技术研究中心项目(16DZ2281200)

Effect of additive amount of PCL on the nitrate-nitrogen removal in the recirculating aquaculture freshwater

HOU Zhiwei1, GAO Jinfang1, LUO Guozhi1,2(1 Research and Development Center of Aquacultural Engineering of Shanghai, Shanghai 201306, China;#br# 2 Shanghai Collaborative Innovation Center for Aquatic Animal Genetics and Breeding, National Demonstration Center for Experimental Fisheries Science Education (Shanghai Ocean University), Shanghai 201306, China)   

  1. (1 Research and Development Center of Aquacultural Engineering of Shanghai, Shanghai 201306, China;
    2 Shanghai Collaborative Innovation Center for Aquatic Animal Genetics and Breeding, National Demonstration Center for Experimental Fisheries Science Education (Shanghai Ocean University), Shanghai 201306, China)
  • Online:2017-10-20 Published:2022-09-26

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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。本文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（NO3- -N）负荷为0.1 g /（L·d）条件下，200 mL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，各组的硝酸盐氮去除效率没有明显差异；出水中溶解有机碳的浓度随着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，实验条件下，PCL添加量的增加并不会必然增加硝酸盐氮的去除效率，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。

关键词: 聚己内酯, 固相反硝化, 循环水养殖系统, 硝酸盐氮

Abstract: 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 0.1g/L load of nitrate nitrogen in the influent water, when the additive amount of PCL in a water body of 200ml 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.

Key words: Polycaprolactone, solid phase denitrification, recirculating aquaculture system, nitrate-nitrogen