碳酸钠对生物滤池硝化作用及水体pH的影响
Effect of Na2 CO3 on Nitrification and Water Body pH in the Biofilter
刘峙岳 1程海华 2朱建新 3曲克明 3徐勇3
作者信息
- 1. 烟台涌勤海洋科技有限公司，山东烟台264000
- 2. 上海海洋大学水产与生命学院，上海201306
- 3. 中国水产科学研究院黄海水产研究所，农业部海洋渔业可持续发展重点实验室，山东青岛266000
- 折叠
摘要
[目的]寻找适合在RAS系统的碱性添加剂，为在封闭式循环水养殖系统中（RAS）合理使用Na2 CO3提供理论依据。[目的]通过设置不同梯度的Na2 CO3添加量，研究其对生物滤池硝化反应的影响过程和引起水体pH变化的情况。[结果]与对照组相比，添加适量Na2 CO3不会显著增强生物滤池对TAN和NO2－－N的去除效果，但会在短时间内加快硝化反应的进行，其中添加量分别为80和160 mg／L的C组和D组在反应6 h时，硝化反应速率比其他3组更快，试验结束时各组之间几乎没有差异。此外，添加Na2 CO3还会延缓水体pH随着反应的进行下降的趋势，而延缓程度随着Na2 CO3添加量的增加而增大。[结论]该研究可为Na2 CO3在RAS系统中的合理使用提供理论依据。
Abstract
Objective] To correctly understand and rationally use Na2CO3 as alkaline additives in the closed recirculation aquaculture systems (RAS).[Method] By adding Na2CO3 at a gradient of concentrations to the biofilter, the effects of Na2CO3 on biofilter nitrification process and the changes of pH value in the water were preliminarily studied.[Result] Compared to the control group, adding proper amount of Na2CO3 did not significantly enhance the removal effect of TAN and NO2--N in the biofilter, but accelerated the nitration reaction in a short time.After 6h of reaction, the nitrification rates of treatments C and D were faster than the other three treatments .By the end of the experiment, there was almost no difference between the treatments.In addition, adding Na2CO3 delayed the downtrend of pH in the water, and the degree of delay increased with the adding of Na2CO3.[Conclusion] This research provides theoretical foundation for the rational utilization of Na2CO3 in RAS system.
关键词
循环水养殖系统(RAS)/pH/生物滤池/硝化反应Key words
Recirculation aquaculture system/pH/Biofilter/Nitrification引用本文复制引用
基金项目
国家科技支撑计划项目(2011BAD13B04)
国家科技支撑计划项目(2011BAD13B07)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据