Journal
BIORESOURCE TECHNOLOGY
Volume 243, Issue -, Pages 247-253Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.06.094
Keywords
Microalgae; Chlorella vulgaris; Swine wastewater; Nutrient removal; DNA methylation
Funding
- 13th Five-Year National Innovation and Development of Marine Economy Demonstration Project
- Department of Science and Technology of Fuzhou City of Fujian Province of China [2017-G-57]
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Bio-treatment of wastewater mediated by microalgae is considered as a promising solution. This work aimed to isolate an indigenous microalgal strain (named MBFJNU-1) from swine wastewater effluent and identify as Chlorella vulgaris. After 12 days, the removal efficiencies of total nitrogen (TN) and total phosphorus (TP) in undiluted swine slurry were 90.51% and 91.54%, respectively. Stress tolerance in response to wastewater was verified by cultivating in artificial wastewater containing different levels of chemical oxygen demand (COD), TN and TP. MBFJNU-1 could grow well in undiluted swine slurry and artificial wastewater containing 30,000 mg/L COD or 2000 mg/L TN. Furthermore, global nuclear DNA methylation (5-mC) of MBFJNU-1 was employed to explore the possible mechanism in response to wastewater stress. The results showed that the level of 5-mC was inversely proportional to the growth of MBFJNU-1 in different diluted swine slurry, helping to understand 5-mC variation in response to stress environment. (C) 2017 Elsevier Ltd. All rights reserved.
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