Comprehensive evaluation of a cost-effective method of culturing Chlorella pyrenoidosa with unsterilized piggery wastewater for biofuel production
| Autor: | Yan Gao, Ai Yuchun, Weiguo Zhang, Jiangye Li, Gang Pan, Zhenhua Zhang, Guangping Fan |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Flue gas lcsh:Biotechnology Management Monitoring Policy and Law 01 natural sciences Applied Microbiology and Biotechnology lcsh:Fuel 03 medical and health sciences lcsh:TP315-360 Biofuel Bioenergy lcsh:TP248.13-248.65 Nutrient removal 010608 biotechnology Chlorella pyrenoidosa Sparging 030304 developmental biology 0303 health sciences biology Renewable Energy Sustainability and the Environment Research Chemical oxygen demand Pulp and paper industry biology.organism_classification Vampirovibrionales Chlorella General Energy Wastewater Unsterilized piggery wastewater Environmental science Biotechnology |
| Zdroj: | Biotechnology for Biofuels Biotechnology for Biofuels, Vol 12, Iss 1, Pp 1-11 (2019) |
| ISSN: | 1754-6834 |
| DOI: | 10.1186/s13068-019-1407-x |
| Popis: | Background The utilization of Chlorella for the dual goals of biofuel production and wastewater nutrient removal is highly attractive. Moreover, this technology combined with flue gas (rich in CO2) cleaning is considered to be an effective way of improving biofuel production. However, the sterilization of wastewater is an energy-consuming step. This study aimed to comprehensively evaluate a cost-effective method of culturing Chlorella pyrenoidosa in unsterilized piggery wastewater for biofuel production by sparging air or simulated flue gas, including algal biomass production, lipid production, nutrient removal rate and the mutual effects between algae and other microbes. Results The average biomass productivity of C. pyrenoidosa reached 0.11 g L−1 day−1/0.15 g L−1 day−1 and the average lipid productivity reached 19.3 mg L−1 day−1/30.0 mg L−1 day−1 when sparging air or simulated flue gas, respectively. This method achieved fairish nutrient removal efficiency with respect to chemical oxygen demand (43.9%/55.1% when sparging air and simulated flue gas, respectively), ammonia (98.7%/100% when sparging air and simulated flue gas, respectively), total nitrogen (38.6%/51.9% when sparging air or simulated flue gas, respectively) and total phosphorus (42.8%/60.5% when sparging air or simulated flue gas, respectively). Culturing C. pyrenoidosa strongly influenced the microbial community in piggery wastewater. In particular, culturing C. pyrenoidosa enriched the abundance of the obligate parasite Vampirovibrionales, which can result in the death of Chlorella. Conclusion The study provided a comprehensive evaluation of culturing C. pyrenoidosa in unsterilized piggery wastewater for biofuel production. The results indicated that this cost-effective method is feasible but has considerable room for improving. More importantly, this study elucidated the mutual effects between algae and other microbes. In particular, a detrimental effect of the obligate parasite Vampirovibrionales on algal biomass and lipid production was found. Electronic supplementary material The online version of this article (10.1186/s13068-019-1407-x) contains supplementary material, which is available to authorized users. |
| Databáze: | OpenAIRE |
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