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Hydrogen production from meat processing and restaurant waste derived crude glycerol by anaerobic fermentation and utilization of the spent broth
Author(s) -
Sarma Saurabh Jyoti,
Brar Satinder Kaur,
Le Bihan Yann,
Buelna Gerardo,
Soccol Carlos Ricardo
Publication year - 2013
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4099
Subject(s) - biohydrogen , bioconversion , fermentative hydrogen production , fermentation , biomass (ecology) , enterobacter aerogenes , pulp and paper industry , dark fermentation , food science , hydrogen production , biodiesel production , chemistry , glycerol , waste management , environmental science , microbiology and biotechnology , biodiesel , biology , biochemistry , agronomy , catalysis , engineering , escherichia coli , gene
BACKGROUND Crude glycerol ( CG ), the major by‐product of the biodiesel production process, could be used for biohydrogen production. However, fermentative hydrogen production is limited by the cost of buffer and additional nutrients required for the process. Thus, the purpose of the present study was to determine maximum H 2 production potential of CG in the absence of any additional expensive supplement. Another objective was sustainable utilization of the waste from the H 2 production process.RESULTS A maximum production of 2022.5 mL H 2 L −1 media was achieved by CG bioconversion (without any additional nutrient) and 10 g L −1 CG was found to be optimum. Further, the addition of spent biomass (50 mg L −1 ) from the process into a subsequent process was found to improve production by 32.5% with a maximum rate of 1040 mL L −1 day −1 . Similarly, nearly 75% of total H 2 was produced at a pH as low as 3.8, indicating high acid tolerance of the strain ( Enterobacter aerogenes NRRL B407 ) used.CONCLUSION Meat processing and restaurant waste based CG has been characterized and evaluated for maximum H 2 production potential. Utilization of spent biomass from the CG bioconversion process (as supplement) was found to improve process performance. © 2013 Society of Chemical Industry