Journal
BIORESOURCE TECHNOLOGY
Volume 247, Issue -, Pages 190-199Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.09.092
Keywords
Phosphate-solubilizing bacteria (PSB); Composting; Inoculation; Organic acids; Tricalcium phosphate solubilization
Funding
- National Natural Science Foundation of China [51378097, 51178090, 51778116]
- National Key Technology R D Program [2012BAJ21B02-02]
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Enriched phosphate-solubilizing bacteria (PSB) agent were acquired by domesticated cultivation, and inoculated into kitchen waste composting in different stages. The effect of different treatments on organic acids production, tricalcium phosphate (TCP) solubilization and their relationship with bacterial community were investigated during composting. Our results pointed out that inoculation affected pH, total acidity and the production of oxalic, lactic, citric, succinic, acetic and formic acids. We also found a strong advantage in the solubilization of TCP and phosphorus (P) availability for PSB inoculation especially in the cooling stage. Redundancy analysis and structural equation models demonstrated inoculation by different methods changed the correlation of the bacterial community composition with P fractions as well as organic acids, and strengthened the cooperative function related to P transformation among species during composting. Finally, we proposed a possible mechanism of P solubilization with enriched PSB inoculation, which was induced by bacterial community and organic acids production.
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