New approaches for solubilization of phosphate rocks through solid-state fermentation by optimization of oxalic acid production.

Autor: Rodrigues NA; Graduate Program of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luís km 235 - SP-310, 13565-905 São Carlos, SP, Brazil; Embrapa Instrumentação, Rua XV de Novembro 1452, 13565-905 São Carlos, SP, Brazil; Chemical Engineering Department, Federal University of São Carlos, Rod. Washington Luís km 235 - SP-310, 13565-905 São Carlos, SP, Brazil., Buffo MM; Chemical Engineering Department, Federal University of São Carlos, Rod. Washington Luís km 235 - SP-310, 13565-905 São Carlos, SP, Brazil., Casciatori FP; Graduate Program of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luís km 235 - SP-310, 13565-905 São Carlos, SP, Brazil; Chemical Engineering Department, Federal University of São Carlos, Rod. Washington Luís km 235 - SP-310, 13565-905 São Carlos, SP, Brazil., Farinas CS; Graduate Program of Chemical Engineering, Federal University of São Carlos, Rod. Washington Luís km 235 - SP-310, 13565-905 São Carlos, SP, Brazil; Embrapa Instrumentação, Rua XV de Novembro 1452, 13565-905 São Carlos, SP, Brazil. Electronic address: cristiane.farinas@embrapa.br.
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2024 Sep; Vol. 408, pp. 131165. Date of Electronic Publication: 2024 Jul 26.
DOI: 10.1016/j.biortech.2024.131165
Abstrakt: This study explores the enhancement of phosphate rock (PR) solubilization through solid-state fermentation (SSF) by optimizing oxalic acid production using Aspergillus niger. Key process parameters, including the use of agro-industrial by-products (sugarcane bagasse (SCB), wheat bran (WB), soybean bran (SB)), pH levels, sucrose supplementation, and methanol addition, were systematically evaluated through sequential experimental designs. The results identified SCB and SB in a 1:1 ratio as the most effective substrate. Remarkably, the inclusion of methanol (7 %) and sucrose (0.5 %) resulted in a 3-fold increase in oxalic acid production. Under these optimized conditions, significant phosphorus solubilization of Bayóvar, Itafós, and Registro PRs was achieved, with Bayóvar rock releasing up to 12.1 g/kgds of soluble P (63.8 % efficiency). Additionally, the SSF process effectively released organic phosphorus from the agro-industrial substrates. These findings hold promise for advancing the bio-based economy and developing future industrial biofertilizers.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
Externí odkaz: