Liquid waste from bio-hydrogen production - A commercially attractive alternative for phosphate solubilizing bio-fertilizer

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• 作者：Saurabh Jyoti Sarma ; Satinder Kaur Brar ; Yann Le Bihan ; Gerardo Buelna
• 关键词：Biodiesel ; Bio-hydrogen liquid waste ; Crude glycerol ; Organic acid ; Phosphate solubilizing bio-fertilizer ; Waste management
• 刊名：International Journal of Hydrogen Energy
• 出版年：2013
• 出版时间：17 July, 2013
• 年：2013
• 卷：38
• 期：21
• 页码：8704-8707
• 全文大小：440 K

文摘

Organic acids produced by commercial phosphate solubilizing bio-fertilizer (PSB) can chelate the cations of insoluble phosphates (such as Ca₃ (PO₄)₂) present in soil to solubilize the phosphate and make it available for plants. Meanwhile, during H₂ production (dark fermentation) different organic acids are produced as unwanted by-products. Interestingly, the acid-rich liquid waste of the process has excellent phosphate solubilizing ability (36.12 folds increase) and it could be considered as a potential alternative for PSB. Studies have demonstrated that biodiesel manufacturing waste (crude glycerol) could be used as a substrate for hydrogen production and the secondary waste could be used as a phosphate solubilizing agent. Thus, this novel approach could: (i) offer a green fertilizer; (ii) improve economic sustainability of bio-hydrogen production and; (iii) could become a financial booster for biodiesel manufacturers by offering them a profitable waste management strategy.