利用化化嗜硫微生物酸化硫杆菌从铸造厂粉尘中提取锌

IF 3.7 3区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biochemical Engineering Journal Pub Date : 2025-07-08 DOI:10.1016/j.bej.2025.109859

Rebeka Frueholz , Clemens Habermaier , Sabine Spiess , Ludwig Birklbauer , Georg M. Guebitz , Marianne Haberbauer

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引用次数: 0

摘要

不断产生的钢铁副产品需要创新的回收解决方案，以努力实现循环经济。在这项研究中，研究人员评估了趋化岩石营养微生物A. thiooxidans的生物淋滤潜力，以从钢铁副产品铸钢粉尘（CHD）中提取不需要的锌，同时在粉尘基质中特异性地保留铁，从而实现现场回收。采用加料式搅拌槽反应器，在CHD浓度为125 g L⁻¹ 的条件下，通过一系列的重复来评估过程的稳定性。在此调查过程中，检查了两个不同的通气0.42 vvm和0.50 vvm。14天后，最多75 ± 5 %的Zn被溶解，而只有9 ± 2 %的Fe被溶解。然而，7天后，大部分Zn被提取出来，Zn的平均浸出率为68 ± 2 %，Fe的平均浸出率为5 ± 2 %。虽然增加曝气率并没有显著提高kLa值，但它略微提高了O₂的可用性，这突出了进一步优化曝气设置的必要性。

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Zinc extraction from cast-house dust using the chemolithotrophic microorganism Acidithiobacillus thiooxidans

The continuous generation of steel by-products calls for innovative recycling solutions in order to strive towards a circular economy. In this study, the bioleaching potential of the chemolithotrophic microorganism A. thiooxidans was evaluated to extract unwanted Zn from the steel by-product cast-house dust (CHD) while specifically retaining Fe within the dust matrix to enable on-site recycling. A fed-batch stirred tank reactor was employed, and process stability was assessed through a series of replicates at a CHD concentration of 125 g L⁻¹ . Two distinct aerations 0.42 vvm and 0.50 vvm were examined during the course of this investigation. After 14 days, a maximum of 75 ± 5 % Zn underwent solubilization while only 9 ± 2 % of Fe was solubilized. However, after 7 days the majority of Zn was extracted resulting in an average leaching efficiency of 68 ± 2 % for Zn and 5 ± 2 % for Fe. Although increasing the aeration rate did not significantly improve the k_La value, it slightly enhanced O₂ availability, highlighting the need for further optimization of the aeration setup.

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来源期刊

Biochemical Engineering Journal 工程技术-工程：化工

CiteScore

7.10

自引率

5.10%

发文量

380

审稿时长

34 days

期刊介绍： The Biochemical Engineering Journal aims to promote progress in the crucial chemical engineering aspects of the development of biological processes associated with everything from raw materials preparation to product recovery relevant to industries as diverse as medical/healthcare, industrial biotechnology, and environmental biotechnology. The Journal welcomes full length original research papers, short communications, and review papers* in the following research fields: Biocatalysis (enzyme or microbial) and biotransformations, including immobilized biocatalyst preparation and kinetics Biosensors and Biodevices including biofabrication and novel fuel cell development Bioseparations including scale-up and protein refolding/renaturation Environmental Bioengineering including bioconversion, bioremediation, and microbial fuel cells Bioreactor Systems including characterization, optimization and scale-up Bioresources and Biorefinery Engineering including biomass conversion, biofuels, bioenergy, and optimization Industrial Biotechnology including specialty chemicals, platform chemicals and neutraceuticals Biomaterials and Tissue Engineering including bioartificial organs, cell encapsulation, and controlled release Cell Culture Engineering (plant, animal or insect cells) including viral vectors, monoclonal antibodies, recombinant proteins, vaccines, and secondary metabolites Cell Therapies and Stem Cells including pluripotent, mesenchymal and hematopoietic stem cells; immunotherapies; tissue-specific differentiation; and cryopreservation Metabolic Engineering, Systems and Synthetic Biology including OMICS, bioinformatics, in silico biology, and metabolic flux analysis Protein Engineering including enzyme engineering and directed evolution.