Enhanced biosolubilization of mid-low grade phosphate rock by formation of microbial consortium biofilm from activated sludge

• Autorzy: Xiao Chunqiao , Wu Xiaoyan , Zhu Lei , Yu Tong , Xu Zhenghe , Chi Ruan

Identyfikatory

DOI

10.5277/ppmp18123

• Języki publikacji: EN

Abstrakty

EN

Mid-low grade phosphate rock (PR) is a potential source of free phosphate to facilitate crop growth, but a cost effective and environmentally responsible extraction process is required. In this study, the capacity of a microbial consortium from activated sludge to solubilize PR in a laboratory-scale column reactor was investigated. The microbial consortium proved capable of efficiently releasing soluble phosphate in the reactor effluent over the 90-day trial. The microbial consortium grew well in the column system as evidenced by reduced chemical oxygen demand (COD) in the reaction solution. Biofilm formation was identified as critical for biosolubilization of the mid-low grade PR. Imaging of the biofilm by scanning electron microscopy (SEM) revealed a dense network of microbial cells embedded in extracellular polymeric substances (EPS). The biofilm contained both oxic and anoxic zones. The pH decreased significantly in both the biofilm and the reaction solution during operation, indicating healthy growth of the microbial consortium with corresponding acid generation and subsequent enhancement of phosphate solubilization.

Słowa kluczowe

EN

biosolubilization; phosphate rock (PR); microbial consortium; activated sludge; biofilm

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 1
• Strony: 217--224
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Xiao Chunqiao

• Key Laboratory for Green Chemical Process of Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China 430073

autor

Wu Xiaoyan

• Key Laboratory for Green Chemical Process of Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China 430073

autor

Zhu Lei

• Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 1H9

autor

Yu Tong

• Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 1H9

autor

Xu Zhenghe

• Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 1H9

autor

Chi Ruan

• Key Laboratory for Green Chemical Process of Ministry of Education, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China 430073

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).