Understanding the biochemical characteristics of struvite bio-mineralising microorganisms and their future in nutrient recovery

Autor: Robert Colston, Ana Soares, Yirong Leng
Rok vydání: 2019
Předmět:
Biomineralization
Environmental Engineering
Urease
Struvite
Health
Toxicology and Mutagenesis
Microorganism
0208 environmental biotechnology
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
Wastewater
01 natural sciences
Waste Disposal
Fluid
Phosphates
chemistry.chemical_compound
Halobacterium salinarum
Environmental Chemistry
Magnesium
Food science
Biochemical properties
0105 earth and related environmental sciences
chemistry.chemical_classification
biology
Bacteria
Bacillus pumilus
Phosphorus
Public Health
Environmental and Occupational Health
Biomineral formation
General Medicine
General Chemistry
Nutrients
Electron acceptor
biology.organism_classification
Pollution
020801 environmental engineering
chemistry
Phosphorus recovery
biology.protein
Statistical design
Mesophile
Zdroj: Chemosphere. 247
ISSN: 1879-1298
Popis: The biochemical properties of selected microorganisms (Bacillus pumilus, Brevibacterium antiquum, Myxococcus xanthus, Halobacterium salinarum and Idiomarina loihiensis), known for their ability to produce struvite through biomineralisation, were investigated. All five microorganisms grew at mesophilic temperature ranges (22–34 °C), produced urease (except I. loihiensis) and used bovine serum albumin as a carbon source. I. loihiensis was characterised as a facultative anaerobe able to use O2 and NO3 as an electron acceptor. A growth rate of 0.15 1/h was estimated for I. loihiensis at pH 8.0 and NaCl 3.5% w/v. The growth rates for the other microorganisms tested were 0.14–0.43 1/h at pH 7–7.3 and NaCl ≤1% w/v. All the microorganisms produced struvite, as identified by morphological and X-ray Powder Diffraction (XRD) analysis, under aerobic conditions. The biological struvite yield was between 1.5 and 1.7 g/L of media, the ortho-phosphate removal and recovery were 55–76% and 46–54%, respectively, the Mg2+ removal and recovery was 92–98% and 83–95%, respectively. Large crystals (>300 μm) were observed, with coffin-lid and long-bar shapes being the dominant morphology of biological struvite crystals. The characterisation of the biochemical properties of the studied microorganisms is critical for reactor and process design, as well as operational conditions, to promote phosphorus recovery from waste streams.
Databáze: OpenAIRE
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