Economics at your fingertips  

Comparative evaluation of biomass production and bioenergy generation potential of Chlorella spp. through anaerobic digestion

Sanjeev Kumar Prajapati, Anushree Malik and Virendra Kumar Vijay

Applied Energy, 2014, vol. 114, issue C, 790-797

Abstract: Microalgae Chlorella spp. are being considered of great research interest for biofuel application. The current study was focused on the comparative exploration of biogas production potential of three Chlorella spp. namely C. minutissima, C. vulgaris and C. pyrenoidosa. Among the tested algae C. pyrenoidosa was found to be the best in both biomass production potential and biogas generation. After 12days of cultivation, biomass productivity was found to be 0.90±0.04, 0.98±0.11 and 0.92±0.01gL−1, respectively, for C. minutissima, C. pyrenoidosa and C. vulgaris. The corresponding estimated annual areal yields were 27.37, 27.98 and 29.20tons dry biomass ha−1y−1, respectively. The elemental and biochemical composition of the algal biomass was also determined and the theoretical/stoichiometric methane potential (TMP and SMP) of respective algal biomass was estimated. The estimated TMP and SMP values ranged from 0.563 to 0.592 and 0.598 to 0.699m3kg−1 VS, respectively. C. pyrenoidosa was found to have the highest TMP and SMP. Moreover, biogas production potential was also determined through BMP protocols. Relatively higher biogas yield of 0.464±0.066m3biogaskg−1 VS added with 57% (v/v) CH4 content was obtained for C. pyrenoidosa biomass during 30day digestion. Moreover, the digestate analyses showed that all parameters (pH, alkalinity, VFA and NH3–N concentration) were in the stable range. In-contrast with the good biogas potential, the digestibility of the Chlorella biomass was around 50%. Current findings revealed that there is need of extensive comparative analysis in order to find out the interspecific variations of the algae with respect to biofuel production.

Keywords: Chlorella; BMP; SMP; Anaerobic digestion; Biogas; Digestibility (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations View citations in EconPapers (6) Track citations by RSS feed

Downloads: (external link)
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link:

Ordering information: This journal article can be ordered from
http://www.elsevier. ... 405891/bibliographic

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Series data maintained by Dana Niculescu ().

Page updated 2017-09-29
Handle: RePEc:eee:appene:v:114:y:2014:i:c:p:790-797