期刊
BIORESOURCE TECHNOLOGY
卷 297, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122516
关键词
Tribonema sp.; Chlorella zofingiensis; Co-culture; Swine wastewater; Fishery wastewater; Harvest efficiency
资金
- National Natural Science Foundation of China [31560724]
- Natural Science Foundation of Zhejiang Province [LY20D060003]
- International Postdoctoral Exchange Fellowship Program [20180042]
- China Postdoctoral Science Foundation [2017T100583, 2016M600616]
- Ningbo Municipal Science and Technology Project [2019C10071]
- Ningbo Municipal Natural Science Foundation [431901822]
- Natural Science Foundation of Jiangxi Province [20171BAB214014]
- Key Laboratory of Poyang Lake Ecological Environment and Resource Development [PK2017001]
- Ningbo University
Cultivating microalgae on wastewaters is an effective way to produce algal biomass whereas harvesting microalgae is a costly operation. This study we examined the feasibility of co-culturing a high-value microalga with an auto-flocculating strain to enable efficient recovery of biomass. Experiments were conducted to co-cultivate Chlorella zofingiensis with Tribonema sp. on swine wastewater diluted by fishery wastewater under different conditions. The result showed the optimal inoculum ratio of Tribonema sp. to Chlorella zofingiensis was 1:1. The removal efficiencies of pollutants (NH4+-N, TN, TP, and COD) and lipid content were high when the co-culture ratios of Tribonema sp. were high. Also, some larger chain fatty acids, specifically C20:5 and C22:6 were present when the two strains co-culture. The recovery efficiency increased with the increasing proportion of auto-flocculating Tribonema sp.. Algae co-culture has the potential to address limitations in substrate utilization by individual strains, also improve the recovery of biomass.
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