期刊
BIORESOURCE TECHNOLOGY
卷 313, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123499
关键词
Ammonium; Wastewater; C. pyrenoidosa; Protein; Photofermentation
资金
- Key Project of Guangdong Basic and Applied Basic Research Fund (Dongguan Joint Fund) [2019B1515120002]
- SinoPec Technology Development Program [218017-1, 36100002-19-FW2099-0035]
To achieve a high consumption rate of ammonium with biomass coproduction, the mixotroph Chlorella pyrenoidosa was cultivated in high ammonium-high salinity wastewater medium in this study. The initial cell density, glucose and ammonium concentrations, and light intensity were optimized in shake flasks. A 5-L fermenter with surrounding LED (Light Emitting Diode) and a 50-L fermenter with inlet LED were employed for batch and semicontinuous cultivation. The results demonstrated that the highest contents of protein (56.7% DW) and total pigments (4.48% DW) with productivities of 5.62 g L-1 d(-1) and 0.55 mg L-1 d(-1), respectively, were obtained in 5-L photofermenter, while the maximum NH4+ consumption rate (1,800 mg L-1 d(-1)) and biomass yield (23.6 g L-1) were achieved in 50-L photofermenter. This study developed a novel strategy to convert high ammonium in wastewater to high-protein algal biomass, facilitating wastewater bioremediation and nitrogen recycling utilization by the mixotroph C. pyrenoidosa in photofermentation.
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