ISSN : 0975-9492


Open Access

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Title : Cost effective and economic method for cultivation of Chlorella pyrenoidosa for the simultaneous treatment of biogas digester wastewater and biogas production
Authors : Rohit Sharma, Avanish K Tiwari, G. Sanjay Kumar, Bhawna Y. Lamba
Keywords : Chlorella pyrenoidosa, anaerobic digester outlet slurry, cultivation, nitrogen nitrate, Lipids
Issue Date : February 2015
Abstract :
Microalgae have recently received a lot of attention as a new biomass source for the production of bio fuels and for the treatment of waste water. In this work, Chlorella pyrenoidosa was cultivated in biogas digester wastewater. The growth kinetics of the algae as well as the bio-remediation effect on the waste water was studied. The Chlorella pyrenoidosa can utilize the nitrogen content present in biogas digester wastewater as a substrate for its growth. The growth of microalgae was found to follow the Monod growth model satisfactorily. Under the optimal condition in biogas waste water medium of microalgae, a maximum biomass of 1.5 gm/l was obtained in fifteen days. The net specific growth rate of microalgae Chlorella pyrenoidosa was found to be 0.1 D -1. The growing algae also removed 76 % of nitrate nitrogen (NO3-N) from the biogas wastewater. Treated Biogas waste water can be further used for the anaerobic digestion of algal biomass for the production of biogas. This suggests that the cultivation of Chlorella pyrenoidosa in biogas wastewater would be efficient, saving water as well as producing digestible biomass. Thus, on one hand the biogas waste water is being treated and on the other, the alga is showing substantial growth. The same algal species can then be used to produce biogas or other corresponding bio fuel.
Page(s) : 318-321
ISSN : 0975-9492
Source : Vol. 6, No.2