title: Potential Application of Biohydrogen Production Liquid Waste as Phosphate Solubilizing Agent-A Study Using Soybean Plants.
abstract: With CO2 free emission and a gravimetric energy density higher than gasoline, diesel, biodiesel, and bioethanol, biohydrogen is a promising green renewable energy carrier. During fermentative hydrogen production, 60-70 % of the feedstock is converted to different by-products, dominated by organic acids. In the present investigation, a simple approach for value addition of hydrogen production liquid waste (HPLW) containing these compounds has been demonstrated. In soil, organic acids produced by phosphate solubilizing bacteria chelate the cations of insoluble inorganic phosphates (e.g., Ca3 (PO4)2) and make the phosphorus available to the plants. Organic acid-rich HPLW, therefore, has been evaluated as soil phosphate solubilizer. Application of HPLW as soil phosphate solubilizer was found to improve the phosphorus uptake of soybean plants by 2.18- to 2.74-folds. Additionally, 33-100 % increase in seed germination rate was also observed. Therefore, HPLW has the potential to be an alternative for phosphate solubilizing biofertilizers available in the market. Moreover, the strategy can be useful for phytoremediation of phosphorus-rich soil.
authors.affiliation: Institut National de la Recherche Scientifique (INRS), Centre Eau, Terre & Environnement (ETE), 490, Rue de la Couronne, Québec, QC, G1K 9A9, Canada.
authors.forename: Saurabh Jyoti
authors.initials: SJ
authors.lastname: Sarma
authors.affiliation: Institut National de la Recherche Scientifique (INRS), Centre Eau, Terre & Environnement (ETE), 490, Rue de la Couronne, Québec, QC, G1K 9A9, Canada. satinder.brar@ete.inrs.ca.
authors.forename: Satinder Kaur
authors.initials: SK
authors.lastname: Brar
authors.affiliation: Centre de Recherche Industrielle du Québec (CRIQ), Québec, QC, G1P 4C7, Canada.
authors.forename: Yann
authors.initials: Y
authors.lastname: LeBihan
authors.affiliation: Centre de Recherche Industrielle du Québec (CRIQ), Québec, QC, G1P 4C7, Canada.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Buelna
mesh_terms: D021902:Enterobacter aerogenes / Q000378:metabolism; D005990:Glycerol / Q000378:metabolism; D006859:Hydrogen; D010710:Phosphates / Q000737:chemistry*; D012995:Solubility; D013025:Glycine max / Q000378:metabolism*
chemical_list: D010710:Phosphates; D006859:Hydrogen; D005990:Glycerol
keywords: Biohydrogen; Bioremediation; Organic acids; Phosphate solubilization