Biomass production and nutrients removal by a new microalgae strain Desmodesmus sp. in anaerobic digestion wastewater.
Anaerobic digestion wastewater (ADW), which contains large amount of nitrogen and phosphorus, particularly high concentration of ammonium, might lead to severely environmental pollution. A new unicellular green microalgae species from a wetland at the Olympic Forest Park, Beijing, China was screened based on its growth rates and nutrients removal capability under ADW. Results of 18s rDNA and ITS1 analysis indicated that this strain have a close relationship with Desmodesmus sp., named as EJ9-6. Desmodesmus sp. EJ9-6 could remove 100% NH4-N (68.691mg/L), TP (4.565mg/L) and PO4-P (4.053mg/L), and 75.50% TN (84.236mg/L) at 10.0% ADW, which the highest biomass production was 0.412g/L after 14d cultivation. Maximum nutrients removal was observed at 10.0% ADW with daily removal rates of TN, NH4-N, TP and PO4-P at 4.542, 5.284, 0.326 and 0.290mg/L/d, respectively.
College of Engineering/Biomass Engineering Center, China Agricultural University, PR China; Key Laboratory of Clean Production and Utilization of Renewable Energy, Ministry of Agriculture, PR China.
Fang
F
Ji
College of Agriculture and Biotechnology, China Agricultural University, PR China; Key Laboratory of Clean Production and Utilization of Renewable Energy, Ministry of Agriculture, PR China.
Ying
Y
Liu
College of Food Science and Nutritional Engineering, China Agricultural University, PR China.
Rui
R
Hao
College of Water Resources and Civil Engineering, China Agricultural University, PR China; Key Laboratory of Clean Production and Utilization of Renewable Energy, Ministry of Agriculture, PR China.
Gang
G
Li
College of Engineering/Biomass Engineering Center, China Agricultural University, PR China; Key Laboratory of Clean Production and Utilization of Renewable Energy, Ministry of Agriculture, PR China. Electronic address: zhouyg@cau.edu.cn.
Yuguang
Y
Zhou
College of Engineering/Biomass Engineering Center, China Agricultural University, PR China; Key Laboratory of Clean Production and Utilization of Renewable Energy, Ministry of Agriculture, PR China.
Renjie
R
Dong
D000693:Anaerobiosis; D018533:Biomass; D000460:Chlorophyta / Q000502:physiology*; D058086:Microalgae / Q000502:physiology*; D009584:Nitrogen / Q000302:isolation & purification / Q000378:metabolism*; D010758:Phosphorus / Q000302:isolation & purification / Q000378:metabolism*; D062065:Wastewater; D018508:Water Purification
D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater
Anaerobic digestion wastewater (ADW); Biomass production; Desmodesmus sp.; Nutrient removal