

FOLLOWUS
1.Qingdao University of Science and Technology, Qingdao 266042, China
2.Key Laboratory of Experimental Marine Biology, Chinese Academy of Sciences, Institute of Oceanology, Qingdao 266071, China
3.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China
duyishuai@qdio.ac.cn
Received:01 December 2021,
Published:01 May 2023
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SUN Yuhuan,LU Jian,QIU Tianlong,et al.The dissolution of total suspended solids and treatment strategy of tailwater in a ,Litopenaeus vannamei recirculating aquaculture system[J].Journal of Oceanology and Limnology,2023,41(03):1197-1205.
In recirculating aquaculture systems (RASs)
the effective treatment of aquaculture tailwater is essential to maintain the health of the RAS. This study investigated the optimal time and method for tailwater treatment during three periods of the aquaculture of the
Litopenaeus
vannamei
: nursery (0–26 d)
middle (27–57 d)
and later (57–104 d). The variation of several water parameters during the dissolution of total suspended solid (TSS) in tailwater
applied with the effects of ozone on the microorganism and water quality parameters were investigated. Results showed that the TSS concentrations in tailwater decreased with time
although not significantly (
P>
0.05)
whereas total ammonia nitrogen (TAN)
nitrite (
<math id="M1"><mi mathvariant="normal">N</mi><msubsup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn mathvariant="normal">2</mn></mrow><mrow><mo>-</mo></mrow></msubsup></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201139&type=
3.47133350
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201141&type=
5.67266655
-N)
and nitrate (
<math id="M2"><mi mathvariant="normal">N</mi><msubsup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn mathvariant="normal">3</mn></mrow><mrow><mo>-</mo></mrow></msubsup></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201144&type=
3.47133350
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201132&type=
5.67266655
-N) increased significantly (
P<
0.05). Therefore
TSS should be removed from the tailwater as early as possible
being most optimal within 4 h. Ozone removed 38.24%–48.95% of TSS
17.78%–90.14% of TAN
and 87.50%–98.90% of
<math id="M3"><mi mathvariant="normal">N</mi><msubsup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn mathvariant="normal">2</mn></mrow><mrow><mo>-</mo></mrow></msubsup></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201134&type=
3.47133350
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201148&type=
5.67266655
-N after 4 h of treatment. However
it resulted in the significant accumulation of
<math id="M4"><mi mathvariant="normal">N</mi><msubsup><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn mathvariant="normal">3</mn></mrow><mrow><mo>-</mo></mrow></msubsup></math>
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201154&type=
3.47133350
https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=67201155&type=
5.67266655
-N. Moreover
the total number of
Vibrio
and bacterial counts in aquaculture tailwater was reduced completely by ozone within 4 h. Thus
these results provided technical details and data support for the effective treatment of tailwater from shrimp RAS.
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