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| Effects of ozonation of piggery tail water on the antioxidant system in Vallisneria spiralis |
| Received:May 31, 2016 |
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| KeyWord:ozonation;piggery tail water;submerged macrophytes;Vallisneria spiralis;antioxidant system |
| Author Name | Affiliation | E-mail | | WANG Jun-li | Shanghai Academy of Agricultural Science, Shanghai 201403, China | | | CHEN Gui-fa | Shanghai Academy of Agricultural Science, Shanghai 201403, China | | | LIU Fu-xing | Shanghai Academy of Agricultural Science, Shanghai 201403, China | liufuxing@126.com | | SONG Xiang-fu | Shanghai Academy of Agricultural Science, Shanghai 201403, China | | | ZOU Guo-yan | Shanghai Academy of Agricultural Science, Shanghai 201403, China | |
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| Abstract: |
| Ozonation is becoming more prevalent as a pretreatment in the dispose of livestock wastewater, there are growing concerns on the effects of ozonation technology on sustainable development of environment.In this research, after the piggery tail water from biological pond system was further treated by ozonation, the effects of ozonized piggery tail water on the health of aquatic ecosystems were investigated in the terms of reactive oxygen species and antioxidant system of Vallisneria spiralis. The results showed that compared with the un-ozonized tail water, ozonation(AO1 10 mg·L-1, AO2 30 mg·L-1, AO3 50 mg·L-1) increased hydrogen peroxide(H2O2) content in Vallisneria spiralis. AO2 treatment increased ascorbate peroxidase(APX) activity, ascorbic acid(AsA) and glutathione(GSH) content and the biomass, indicating the important role of AsA-GSH cycle in regulating H2O2 levels. However, AO3 treatment decreased AsA content, broke the balance between H2O2 and antioxidants and resulted in the decreased biomass of Vallisneria spiralis. Our results suggested that, 30 mg·L-1 is the optimum ozone concentration to treat piggery tail water, by which it could promote the antioxidant system and growth of submerged macrophytes, and very helpful for the maintenance of healthy aquatic ecosystem. |
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