Cu and Zn Accumulations in <i>Myriophyllum spicatum</i> for Purification of Pig Farm Biogas Slurry

WU Xiao-mei; YE Mei-feng; WU Fei-long; LIN Dai-yan

doi:10.19303/j.issn.1008-0384.2018.11.013

Volume 33 Issue 11

Mar. 2019

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Article Navigation > Fujian Journal of Agricultural Sciences > 2018 > 33(11): 1195-1200

WU Xiao-mei, YE Mei-feng, WU Fei-long, LIN Dai-yan. Cu and Zn Accumulations in Myriophyllum spicatum for Purification of Pig Farm Biogas Slurry[J]. Fujian Journal of Agricultural Sciences, 2018, 33(11): 1195-1200. doi: 10.19303/j.issn.1008-0384.2018.11.013

Citation:

WU Xiao-mei, YE Mei-feng, WU Fei-long, LIN Dai-yan. Cu and Zn Accumulations in Myriophyllum spicatum for Purification of Pig Farm Biogas Slurry[J]. Fujian Journal of Agricultural Sciences, 2018, 33(11): 1195-1200. doi: 10.19303/j.issn.1008-0384.2018.11.013

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Cu and Zn Accumulations in Myriophyllum spicatum for Purification of Pig Farm Biogas Slurry

doi: 10.19303/j.issn.1008-0384.2018.11.013

Aricultural-Engineering Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350003, China

Received Date: 2018-06-08
Rev Recd Date: 2018-10-18
Publish Date: 2018-11-28

Abstract

Abstract

The ability of Myriophyllum spicatum to absorb and accumulate Cu and Zn from pig farm biogas slurry was studied. Hydraulic residence time (HRT) of 20, 40 and 60 d were applied for the plants in the study. It was found that the maximum biomass of the plants in 40 d of HRT reached 1 475.00 g, which was 7.40 times higher than that of control. More importantly, the Cu and Zn accumulations in the plants were 7.66 mg·kg^-1 and 64.18 mg·kg^-1, respectively, which were significantly greater than those in control. The metal removal from the slurry by the plants was at the highest levels when 40 d HRT was applied as well. The reductions on COD, ammonia nitrogen and total phosphorus on the slurry were 92.40%, 92.03% and 74.39%, respectively. After the HRT test the plants had increases of 7.62%-12.57% on organic matters, 30.62%-69.38% on N, 5.88%-12.94% on P, and 3.85%-21.15% on K, as well as contents of 6.76-10.78 mg·kg^-1 of Cu and 77.63-130.60 mg·kg^-1 of Zn. The increases of metal contents met the levels set forth by the national GB26419-2010 and the Agricultural Industry Standard of NY929-2005. Furthermore, the harvested M. spicatum could be used for fodder to effectively avoid the concern of secondary pollution after the biogas slurry purification.
- Myriophyllum spicatum,
- accumulation,
- biogas slurry,
- Cu,
- Zn

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References(30)

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