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Sustainable Algal Cultivation by Effective Utilization of MSW Digestate Slurry and Biogas By-Products—An Advanced Approach Towards Carbon Fixation and Generation of Biofuels

  • Afreen Aman
  • H. N. ChanakyaEmail author
Conference paper

Abstract

With the increasing popularity of generating biogas from Municipal Solid Waste (MSW), large volumes of digested slurry/digestate liquid are being discharged into sewers without recovering the large nutrient content within. Conversion of digestate nutrients to algal biofuel and its further conversion of residues to biogas can now concentrate three value-added by-products from MSW namely: biogas, algal biofuel and nutrient-rich residue. Microalgae with their faster growth rates and high lipid accumulation capability offer the potential to serve as feedstock for biofuel production. The process of biofuel production from algae is environment-friendly as the fuel produced is degradable, non-toxic and potentially carbon neutral. Algal biofuels offer an immense potential for replacing fossil fuels when algal cultivation is carried out in a sustainable manner. This study attempts to develop a sustainable process of biofuel production from algae wherein biogas slurry and CO2 from biogas are used as substrates reducing the potential carbon emissions and mutually benefit. Mixotrophic cultivation of microalgae was carried out with biogas slurry (as nutrient source) to evaluate its potential to replace conventional media since biogas slurry contains dissolved nutrients emerging from the substrate during digestion. Algae grown in biogas slurry-based system showed a 90% higher productivity than the media based system. Utilization of CO2 generated from biogas plant by algae as a carbon source can aid simultaneously in carbon fixation and biogas improvement. This paper also describes the other advantages as algal grazer management when slurry from MSW biogas plants is used for algal cultivation.

Keywords

MSW digestate Alga consortia Grazer Biogas plant slurry Algal biofuel 

References

  1. 1.
    Hill J, Nelson E, Tilman D, Polasky S, Tiffany D (2006) Environmental, economic and energetic costs and benefits of biodiesel and ethanol biofuels. Proc Natl Acad Sci USA 103(30):11206–11210CrossRefGoogle Scholar
  2. 2.
    Moore A (2008) Biofuels are dead: long live biofuels?—Part one. New Biotechnol 25(1):6–12CrossRefGoogle Scholar
  3. 3.
    Chisti Y (2007) Biodiesel from microalgae. Biotechnol Adv 25(3):294–306CrossRefGoogle Scholar
  4. 4.
    Lundquist TJ, Woertz IC, Quinn TWN, Benemann RJ (2010) A realistic technology and engineering assessment of algae biofuel. Biofuel production. Energy Biosci Inst 1–178Google Scholar
  5. 5.
    Waltz E (2009) Biotech’s green gold? Nat Biotechnol 27:15–18CrossRefGoogle Scholar
  6. 6.
    Chanakya HN, Mahapatra D, Sarada MR, Abitha R (2013) Algal biofuel and mitigation potential in India. Mitig Adapt Strat Glob Clim Change 18(1):133–136Google Scholar
  7. 7.
    Chanakya HN, Malayil S Vijayalakshmi C (2015) Cultivation of Pleuritus spp. on a combination of anaerobically digested plant material and various agro residues. Energy Sustain. Dev. 27:84–92CrossRefGoogle Scholar
  8. 8.
    Chanakya HN, Malayil S (2012) Anaerobic retting of banana and areca nut wastes in a plug flow digester for recovery of fiber, biogas and compost. Energy Sustain Dev 27:231–235CrossRefGoogle Scholar
  9. 9.
    Chanakya HN, Malayil S (2012) Anaerobic digestion for bioenergy from agro residues and other solid wastes-an overview of science, technology and sustainability. J Indian Inst Sci 1(92):111–143Google Scholar
  10. 10.
    Abitha R, Chanakya HN, Aman A, Shwetha U (2015) Biogas slurry—an alternative growth media for algae cultivation in agriculture systems with simultaneous reduction algal predation. Carbon Sci Technol 7(2):99–108Google Scholar
  11. 11.
    Anderson MJ, Underwood AJ (1997) Effects of gastropod grazers on recruitment and succession of an estuarine assemblage: a multivariate and univariate approach. Oecologia 109:442–453CrossRefGoogle Scholar
  12. 12.
    Lehman JT, Sandgren CD (1985) Species specific rates of growth and grazing loss among freshwater algae. Limnol Oceanogr 30:9046CrossRefGoogle Scholar
  13. 13.
    Shirvani T, Yan XY, Inderwildi OR, Edwards PP, King DA (2011) Life cycle energy and green house gas analysis for algae-derived biodiesel. Energy Environ Sci 4:3773–3778CrossRefGoogle Scholar
  14. 14.
    Khan SA, Hussain MZ, Prasad S, Bannerjee UC (2009) Prospects of biodiesel production from microalgae in India. Renew Sustain Energy Rev 13(9):2361–2372CrossRefGoogle Scholar
  15. 15.
    Uggetti E, Sialve B, Trably E, Steyer JP (2014) Integrating microalgae production with anaerobic digestion a biorefinery approach. Biofuels, Bioprod Biorefin 8(4):516–529CrossRefGoogle Scholar
  16. 16.
    Kanz T, Bold HC (1969) Physiological studies, morphological and taxonomical investigation of Nostoc and Anabaena in culture. University of Texas, Austin (TX), p 6924Google Scholar
  17. 17.
    Rao AR, Dayananda C, Sarada R, Shamala TR, Ravishankar GA (2007) Effect of salinity on the on the growth of green alga Botrycoccus braunii and its constituents. Biores Technol 98:560–564CrossRefGoogle Scholar
  18. 18.
    Sarada R, Bhattacharya S, Ravishankar GA (2002) Optimization of culture conditions for growth of the green alga Haematococcus pluvialis. World J Microbiol BiotechnolGoogle Scholar
  19. 19.
    Lehman JT, Sandgren CD (1985) Species specific rates of growth and grazing loss among freshwater algae. Limnol Oceanogr 30:9046CrossRefGoogle Scholar
  20. 20.
    Hessen DO, Donk EV (1993) Morphological changes in Scenedesmus sp induced by substances released Daphnia. Arch Hydrobiol 127:129–140Google Scholar
  21. 21.
    Bergquist AM, Carpenter SR (1986) Limnetic herbivory: effects on phytoplankton population and primary productivity. Ecology 67:1351–1630CrossRefGoogle Scholar
  22. 22.
    Agrawal AA (1998) Algal defense, grazers, and their interactions in aquatic trophic cascades. Acta Oecol 19(4):33l–337CrossRefGoogle Scholar
  23. 23.
    Harrington L, Foster R (1999) Australian residential building sector greenhouse gas emissions 1990–2010. Final Report, Energy Efficient Strategies, Australian Greenhouse OfficeGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Centre for Sustainable Technologies (Formerly ASTRA)Indian Institute of ScienceBengaluruIndia

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