Fishery Modernization >

2021 , Vol. 48 >Issue 5: 26 - 35

DOI: https://doi.org/10.3969/j.issn.1007-9580.2021.05.004

Analysis of purification effects and influences of seawater constructed wetland under different hydraulic conditions#br#

  • JIA Jun1 ,
  • 2 ,
  • CUI Zhengguo2 ,
  • TANG Xiaoshuang2 ,
  • ZHANG Keke2 ,
  • CUI Hongwu2 ,
  • LI Xiaojiao1 ,
  • 2 ,
  • QU Keming2
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  • (1 National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai 201306, China ;
    2 Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture; Shandong Provincial Key Laboratory of Fishery Resources and Ecological Environment, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences; Laboratory for Marine Fisheries Science and Food Production Processes, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266071, Shandong, China)

Online published: 2021-11-24

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Abstract

In order to further explore the purification effect of seawater constructed wetland on marine aquaculture wastewater under different hydraulic conditions, the integrated vertical-flow constructed wetland was selected to treat the wastewater of Paralichthys olivaceus farming, and three HRTs (1.5h, 3.0h, 4.5h) were set under three levels of HLR (20m/d、40m/d、100m/d) to explore the removal effects of constructed wetland on nitrogen, phosphorus, COD and other main pollutants in mariculture wastewater. The relationship between microbial community structure and denitrification was analyzed by high-throughput sequencing technology. The results showed that the seawater constructed wetland system had nice effects in nitrogen and phosphorus removing, the removal rates of DIN, PO43--P and COD decreased with the increase of HLR, and the effect of HLR on DIN removal rate is greater than that of PO43--P and COD. Extending HRT could improve the removal rates of DIN, PO43--P and COD, especially on the removal rate of DIN. The discharge standard of DIN、PO43--P and COD could be met when the HLR is 20 m/d and HRT 4.5 h. Environmental conditions such as pH affect the distribution of microorganisms in constructed wetlands, and thus affect the nitrogen removal efficiency of constructed wetlands. This study provides theoretical and technical reference for the efficient purification of mariculture wastewater by constructed wetlands.

Key words： constructed wetland; hydraulic conditions; microbial distribution; seawater

Cite this article

JIA Jun1 , 2 , CUI Zhengguo2 , TANG Xiaoshuang2 , ZHANG Keke2 , CUI Hongwu2 , LI Xiaojiao1 , 2 , QU Keming2 . Analysis of purification effects and influences of seawater constructed wetland under different hydraulic conditions#br#[J]. Fishery Modernization, 2021 , 48(5) : 26 -35 . DOI: 10.3969/j.issn.1007-9580.2021.05.004

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