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| Purification capacity of Myriophyllum spicatum for biogas slurry from pig farms |
| Received:August 31, 2017 |
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| KeyWord:Myriophyllum spicatum;biogas slurry;hydraulic retention time;ammonia nitrogen;dissolved oxygen |
| Author Name | Affiliation | E-mail | | WU Xiao-mei | Agricultural-Engineering Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China | | | YE Mei-feng | Agricultural-Engineering Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China | | | WU Fei-long | Agricultural-Engineering Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China | | | HUANG Wei | Institute of Quality Standards and Detecting Technology, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China | | | LIN Dai-yan | Agricultural-Engineering Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China | lindaiyan@126.com |
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| Abstract: |
| This study investigated the purification capacity of Myriophyllum spicatum for biogas slurry from pig farms using hydroponics methods. Effects of hydraulic retention on biomass, nutrients, CODCr, ammonia nitrogen, nitrate nitrogen, nitrite nitrogen, total phosphorus, dissolved oxygen, and pH were analyzed over 20, 40 d and 60 d. Results indicated that the proportion of biogas slurry increased the biomass and N, P and K content in 20%~30% of M. spicatum. Compared with the control group, the biomass in the processing group increased 1.6~4.9 times; the content of N, P and K increased 1.5~2.0 times, 1.57~1.90 times and 1.35~1.88 times, respectively. Therefore, M. spicatum was able to purify biogas slurry. The purification of nutrients performed best when the hydraulic retention time was 40 d. The CODCr, ammonia nitrogen and total phosphorus removal rate reached 65.99%, 59.54% and 90.06%, respectively. Therefore, M. spicatum is an ideal wetland plant with good potential for wetlands constructed for the biological treatment of biogas slurry from pig farms. |
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