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De-eutrophication of effluent wastewater from fish aquaculture by using marine green alga Ulva pertusa
Liu Jianguo1; Wang Zengfu1,2; Lin Wei1
2010-03-01
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
Volume28Issue:2Pages:201-208
SubtypeArticle
AbstractThe de-eutrophication abilities and characteristics of Ulva pertusa, a marine green alga, were investigated in Qingdao Yihai Hatchery Center from spring to summer in 2005 by analyzing the dynamic changes in NH (4) (+) , NO (3) (-) , NO (2) (-) as well as the total dissolved inorganic nitrogen (DIN). The results show that the effluent wastewater produced by fish aquaculture had typical eutrophication levels with an average of 34.3 mu mol L(-1) DIN. This level far exceeded the level IV quality of the national seawater standard and could easily lead to phytoplankton blooms in nature if discarded with no treatment. The de-eutrophication abilities of U. pertusa varied greatly and depended mainly on the original eutrophic level the U. pertusa material was derived from. U. pertusa used to living in low DIN conditions had poor DIN removal abilities, while materials cultured in DIN-enriched seawater showed strong de-eutrophication abilities. In other words, the de-eutrophication ability of U. pertusa was evidently induced by high DIN levels. The de-eutrophication capacity of U. pertusa seemed to also be light dependent, because it was weaker in darkness than under illumination. However, no further improvement in the de-eutrophication capacity of U. pertusa was observed once the light intensity exceeded 300 mu mol M(2) S(-1). Results of semi-continuous wastewater replacement experiments showed that U. pertusa permanently absorbed nutrients from eutrophicated wastewater at a mean rate of 299 mg/kg fresh weight per day (126 mg/kg DIN during the night, 173 mg/kg in daytime). Based on the above results, engineered de-eutrophication of wastewater by using a U. pertusa filter system seems feasible. The algal quantity required to purify all the eutrophicated outflow wastewater from the Qingdao Yihai Hatchery Center into oligotrophic level I clean seawater was also estimated using the daily discharged wastewater, the average DIN concentration released and the de-eutrophication capacity of U. pertusa.
KeywordUlva Pertusa Eutrophication Din Nh(4)(+)-n No(3)(-)-n No(2)(-)-n
DOI10.1007/s00343-010-9245-5
Indexed BySCI
Language英语
WOS IDWOS:000275781400001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/32847
Collection海洋生物技术研发中心
Affiliation1.Chinese Acad Sci, Inst Oceanol, Res & Dev Ctr Marine Biotech, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu Jianguo,Wang Zengfu,Lin Wei. De-eutrophication of effluent wastewater from fish aquaculture by using marine green alga Ulva pertusa[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2010,28(2):201-208.
APA Liu Jianguo,Wang Zengfu,&Lin Wei.(2010).De-eutrophication of effluent wastewater from fish aquaculture by using marine green alga Ulva pertusa.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,28(2),201-208.
MLA Liu Jianguo,et al."De-eutrophication of effluent wastewater from fish aquaculture by using marine green alga Ulva pertusa".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 28.2(2010):201-208.
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