Microalgae produced during phycoremediation of swine wastewater contains effective bacteriostatic compounds against antibiotic-resistant bacteria

Michelon, William; Silva, Márcio Luís Busi da; Matthiensen, Alexandre; Silva, Evandro; Pilau, Eduardo Jorge; Nunes, Estela de Oliveira; Soares, Hugo Moreira

doi:10.1016/j.chemosphere.2021.131268

Cited by 15 publications

(8 citation statements)

References 67 publications

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“…However, when the culture time was prolonged, the COD concentration drastically elevated to be 563.97 mg/L. These results agreed with the reported results described in previous works about wastewater treatment by microalgae. ,, The phenomena could be explained that some microalgae possibly produced extracellular substances (e.g., protein and polysaccharides) to enhance the COD concentration in the culture system. ,, …”

Section: Resultssupporting

confidence: 91%

“…These results revealed that (1) C. vulgaris MBFJNU-1 could largely remove the NH 4 + -N of SOSW and (2) as for the FOSW treatment by microalga, partial NH 4 + -N of FOSW might be converted into other forms of nitrogen (e.g., NO 3 – and NO 2 – ) by the existing microorganisms such as nitrifying bacteria and nitrite-oxidizing bacteria. ,, …”

Section: Resultsmentioning

confidence: 90%

“…vulgaris MBFJNU-1 cultivated in BG11 and SOSW exhibited similar growth properties; however, microalga cultivated in FOSW attained poor growth performance. The possible reason was that (1) in comparison to BG11 and SOSW, the high level of NH 4 + -N in the FOSW medium might have a negative impact on the microalgal growth and (2) some microorganisms existing in the FOSW might assimilate some nutrients for growth to some extent, leading to some nutrient deficiency that affected microalgal growth. ,, At the end of trials, the microalgal biomasses obtained from BG11, SOSW, and FOSW were 1.71, 1.82, and 1.72 g/L, respectively (Figure A). Based on the statistical analysis, these obtained values for the final biomasses were not significantly different among the three media due to the fact that three media for microalgal growth had close values in TN and TP concentrations (Table ).…”

Section: Resultsmentioning

confidence: 99%

“…The highest TP removal rate (70.77%) was attained by microalga in FOSW. The possible reason could be that microalga along with the existed microorganisms in FOSW promoted the phosphorus utilization, leading to the low residual TP concentration …”

Section: Resultsmentioning

confidence: 99%

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Efficient Strategy by a Newly Isolated Aspergillus oryzae to Harvest Chlorella vulgaris MBFJNU-1 from Original Swine Wastewater

Xie

Chi

et al. 2022

ACS Sustainable Chem. Eng.

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Biological approach is a promising method to efficiently harvest microalgal cells after the wastewater treatment by microalgae. This work aimed to develop an efficient bioflocculation process with a newly isolated filamentous fungus to harvest microalgal cells from the treatment of original swine wastewater (OSW) by Chlorella vulgaris MBFJNU-1 and primarily grope the individual mechanism for this bioflocculation. C. vulgaris MBFJNU-1 performed well growth and nutrient removal (total nitrogen, 72.29–90.98%; NH4 +-N, 97.18–97.80%; and total phosphorus, 47.51–70.77%) after the OSW treatment. Among the isolated filamentous fungi, Aspergillus oryzae exhibited a superior feature to harvest microalgal cells in the OSW treatment by microalga. Under the optimized conditions, the fungal pellet-assisted method with the newly isolated A. oryzae to harvest C. vulgaris cells achieved the highest bioflocculation efficiency (>90%). Moreover, the obtained results suggested that specific components on fungal pellet-derived cell walls belonged to glycoprotein, playing vital roles in the attachment of Chlorella cells. Furthermore, the fungal–microalgal biomass had around 27% lipid with over 90% C16 + C18, which was the promising feedstock for sustainable and renewable biodiesel production. Taken together, the bioflocculation process mediated with the newly isolated A. oryzae was a promising approach to harvest algal cells from wastewater treatment for sustainable biofuels.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Efficient Strategy by a Newly Isolated Aspergillus oryzae to Harvest Chlorella vulgaris MBFJNU-1 from Original Swine Wastewater

Xie

Chi

et al. 2022

ACS Sustainable Chem. Eng.

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“…Different classes of microalgae compounds, including phenols, fatty acids, indole, terpenes, and acetogenins, were reported for their antimicrobial activities 7 . Several reports on antimicrobial compounds extracted from microalgae and their applications against different pathogens are available 7–13 . The increase in multidrug resistance in microbial pathogens has forced researchers to come up with novel compounds from natural origins 14 .…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial peptides derived from microalgae for combating antibiotic resistance: Current status and prospects

Ayswaria¹,

Jasna

Nathan

2023

Cell Biochemistry & Function

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Microalgae are photosynthetic cell factories that produce a spectrum of bioactive compounds extensively used for various applications. Owing to the increase in antibiotic resistance among microbial pathogens, there is a significant thrust for identifying new treatment strategies, and antimicrobial peptides (AMPs) generation is one such method. These AMPs have multiple roles and are active against bacteria, fungi, and viruses. Such peptides synthesized in microalgae have a significant role in medical application, managing aquaculture-associated diseases, and the food industry. To increase their effectiveness and novel peptides, genetically modified microalgae are used as cell factories. With the advancement of new technologies like the CRISPR-Cas system, new avenues are opened for developing novel AMPs using microalgae. This review gives us insight into the various AMPs produced by microalgae and multiple technologies involved in creating such therapeutically essential molecules.

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Feasibility of waste-free use of microalgae in aquaculture

et al. 2022

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Microalgae produced during phycoremediation of swine wastewater contains effective bacteriostatic compounds against antibiotic-resistant bacteria

Cited by 15 publications

References 67 publications

Efficient Strategy by a Newly Isolated Aspergillus oryzae to Harvest Chlorella vulgaris MBFJNU-1 from Original Swine Wastewater

Efficient Strategy by a Newly Isolated Aspergillus oryzae to Harvest Chlorella vulgaris MBFJNU-1 from Original Swine Wastewater

Antimicrobial peptides derived from microalgae for combating antibiotic resistance: Current status and prospects

Feasibility of waste-free use of microalgae in aquaculture

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