Integrated nutrient removal and biogas production by Chlorella vulgaris cultures

Date

2015-05-01

Author

Calicioglu, Ozgul
Demirer, Göksel Niyazi

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Changes in global nutrient cycles as a result of industrialization affect both ecosystems and human well-being. A clear example of human manipulation on ecosystems is eutrophication; a phenomenon caused in receiving water bodies by discharge of urban sewage rich in nutrients such as nitrogen (N) and phosphorus (P). Microalgal nutrient removal is a viable alternative for biological wastewater treatment, considering high nutrient uptake capabilities of microalgae. These systems are also advantageous in terms of nutrient recycling and conversion into microalgal biomass, which, in turn, is a beneficial resource for biofuel production. In addition, microalgae can also aid reduction in atmospheric carbon dioxide levels, as a result of photosynthetic anabolism. In this study, a semi-continuous photobioreactor was operated for investigation of nutrient removal efficiency of unialgal culture, Chlorella vulgaris. Maximum N and P removal efficiencies of 99.6% and 91.2% were achieved in the photobioreactor. Biogas production from biomass obtained from semicontinuous photobioreactor was investigated via Biochemical Methane Potential assays. The results illustrated that maximum biogas yield of 442ml/g Volatile Solids (VS) added could be achieved in anaerobic batch reactors fed with microalgal slurry. (C) 2015 AIP Publishing LLC.

Subject Keywords

Renewable Energy, Sustainability and the Environment

URI

https://hdl.handle.net/11511/57276

Journal

JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY

DOI

https://doi.org/10.1063/1.4922231

Collections

Department of Environmental Engineering, Article

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Citation Formats

O. Calicioglu and G. N. Demirer, “Integrated nutrient removal and biogas production by Chlorella vulgaris cultures,” JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY, pp. 0–0, 2015, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57276.