孙琳琳^1,,
李甍¹,
黄志涛¹,
董登攀¹
1.中国海洋大学水产学院，青岛 266001
基金项目: 青岛“十三五”海洋经济创新发展示范项目

Nitrogen removal performance of artificial wetland with plant carbon source from seawater circulating aquaculture tail water

SUN Linlin^1,,
LI Meng¹,
HUANG Zhitao¹,
DONG Dengpan¹
1.College of Fisheries, Ocean University of China, Qingdao 266001,China

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摘要:针对人工湿地处理海水循环水养殖尾水因碳源不足引起硝态氮去除效果不佳的问题，通过静态释放实验，比较了玉米秸秆、玉米芯以及芒草在海水中的静态释放特性，探究了酸处理和碱处理对玉米芯释放规律的影响，并采用垂直潜流人工湿地系统研究添加玉米芯和玉米芯浸出液对湿地处理海水循环水养殖尾水脱氮效果的影响。结果表明，3种植物碳源都有可观的COD释放量，玉米芯氮素磷素释放量都较小，更适合作为外加碳源；酸处理和碱处理都能提高植物碳源的碳溶出速率，但碱处理的释放速率更稳定，更适合作为预处理方式；添加玉米芯和玉米芯浸出液湿地对硝态氮的去除率分别提高至90.63%和88.56%，表明添加植物碳源能显著提高海水人工湿地的脱氮效果，并证明以植物碳源浸出液替代植物碳源的有效性与可行性。
关键词: 垂直潜流人工湿地/
植物碳源/
海水循环水养殖尾水/
总可溶性氮/
COD

Abstract:This study is focused on the poor nitrate nitrogen removal by a constructed wetland due to insufficient carbon source in seawater circulating aquaculture tail water. The static release experiments were used to compare the static release characteristics of corn stover, corn cob and Miscanthus in freshly sterilized seawater, and study the effect of acid or alkali treatment on the release rule of corn cob. Then the effects of corn cob or corn cob leachate addition on the denitrification of vertical subsurface flow constructed wetland system were studied when treating simulated seawater circulating aquaculture tail water. The results showed that all the three plant carbon sources could release considerable COD, and corn core was more suitable as an additional carbon source due to its low nitrogen and phosphorus release. Both acid and alkali treatment could raise the dissolution rate of C from plant carbon sources, while a more stable dissolution rate occurred for alkali treatment, and it was more suitable as a pretreatment method. In the case of the accumulation of nitrate nitrogen in the blank control wetland, the addition of corn cob and corn cob leachate in the constructed wetland could lead to the increase of nitrate nitrogen removal rate by 90.63% and 88.56%, respectively. This study also proved that the plant carbon source addition could significantly elevate the nitrogen removal effect of constructed wetland treating seawater, plant leachate carbon source was effective and feasible instead of plant carbon source.
Key words:vertical subsurface flow constructed wetland/
plant carbon source/
seawater recirculating aquaculture tail water/
total soluble nitrogen/
COD.

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刊出日期:2019-06-18

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外加植物碳源对人工湿地处理海水循环水养殖尾水脱氮性能的影响

孙琳琳^1,,
李甍¹,
黄志涛¹,
董登攀¹
1.中国海洋大学水产学院，青岛 266001
基金项目: 青岛“十三五”海洋经济创新发展示范项目
关键词: 垂直潜流人工湿地/
植物碳源/
海水循环水养殖尾水/
总可溶性氮/
COD
摘要:针对人工湿地处理海水循环水养殖尾水因碳源不足引起硝态氮去除效果不佳的问题，通过静态释放实验，比较了玉米秸秆、玉米芯以及芒草在海水中的静态释放特性，探究了酸处理和碱处理对玉米芯释放规律的影响，并采用垂直潜流人工湿地系统研究添加玉米芯和玉米芯浸出液对湿地处理海水循环水养殖尾水脱氮效果的影响。结果表明，3种植物碳源都有可观的COD释放量，玉米芯氮素磷素释放量都较小，更适合作为外加碳源；酸处理和碱处理都能提高植物碳源的碳溶出速率，但碱处理的释放速率更稳定，更适合作为预处理方式；添加玉米芯和玉米芯浸出液湿地对硝态氮的去除率分别提高至90.63%和88.56%，表明添加植物碳源能显著提高海水人工湿地的脱氮效果，并证明以植物碳源浸出液替代植物碳源的有效性与可行性。

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