Evaluating the Potential of <i>Halothiobacillus Bacteria</i> for Sulfur Oxidation and Biomass Production under Saline Soil

Boroujeni, Samira Rezvani; Kalbasi, M.; Asgharzadeh, Ahmad; Baharlouei, Jila

doi:10.1080/01490451.2020.1809571

Cited by 13 publications

(5 citation statements)

References 45 publications

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“…These results suggest an antagonism and metabolic competition between Clostridium and the dominant genera in the reactor sample, thus explaining the reduction in relative abundance of Clostridium from 7.1% (inoculum) to 1.4% and the decrease in population diversity and homogeneity observed at the end of the operation. This result contrasts with the findings of (56), who observed that the cocultivation of Clostridium species with Bacillus using yeast waste as substrate led to a higher hydrogen production compared to the isolated cultivation of Clostridium (57)(58)(59).…”

Section: Microbial Community Analysiscontrasting

confidence: 99%

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Silva-Martínez,

Aguilar-Juárez,

Díaz-Jiménez

et al. 2024

Preprint

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Background Biohydrogen production from the organic fraction of municipal solid waste (OFMSW) in co-digestion with sewage sludge (SS) through dark fermentation (DF) is emerging as an alternative route for efficient waste treatment and biofuel production. Notwithstanding, there is little experience with a high-solid approach, where practical conditions are created to further develop feasible industrial-scale projects. This study conducted a biochemical hydrogen potential test using a 7L batch reactor at 35°C for 39 days. Parameters such as pH, redox potential, temperature, alkalinity, total solids, and substrate/inoculum ratio were adjusted and monitored. Biogas composition was analyzed by gas chromatography. The microbial characterization of SS and post-reaction percolate liquids was determined through metagenomics analyses. Results Results demonstrate an initial biohydrogen yield of 38.4 Nml/gVS OFMSW, which forms ~ 60% of the produced biogas. Aeration was proven as an efficient inoculum pretreatment method, mainly to decrease the levels of methanogenic archaea and metabolic competition, and at the same time maintain the required total solid (TS) contents for high-solid conditions. The microbial community analysis shows that the biohydrogen production was carried out by specific anaerobic and aerobic bacteria and dominated by the phylum Firmicutes such as the genus Bacillus, Clostridium, Romboutsia; and the phylum Proteobacteria with the genus Proteus. Conclusion These results aid in setting the base ground to further develop the technology and design a larger bioreactor for DF of OFMSW in co-digestion with SS, considering diverse parameters, the manufacturing process, and instrumentation. Thus, this research provides an alternative solution for OFMSW treatment and biohydrogen production and expects to serve as a basis for future research, which may intend to improve biochemical conditions to increase the amount of hydrogen produced, optimize biodegradation and, at the same time, develop an industrial high-solid dark fermentation system that is technically and economically viable.

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Section: Microbial Community Analysiscontrasting

confidence: 99%

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Silva-Martínez,

Aguilar-Juárez,

Díaz-Jiménez

et al. 2024

Preprint

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“… Boroujeni et al (2021) isolated salt-tolerant sulfur-oxidizing bacteria of genus Halothiobacillus from saline and sulfidic habitats of Iran. Three species (eight strains) of Halothiobacillus genus were identified, which belonged to H. neapolitanus, H. hydrothermalis and H. halophilus .…”

Section: Types Of Biofertilizersmentioning

confidence: 99%

Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Kumar

Diksha

Sindhu

et al. 2022

Current Research in Microbial Sciences

248

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Highlights Agriculture plays an important role in a country's economy. In modern intensive agricultural practices, chemical fertilizers and pesticides are applied on large scale to increase crop production in order to meet the nutritional requirements of the ever-increasing world population. However, rapid urbanization with shrinking agricultural lands, dramatic change in climatic conditions and extensive use of agrochemicals in agricultural practices has been found to cause environmental disturbances and public health hazards affecting food security and sustainability in agriculture. Besides this, agriculture soils are continuously losing their quality and physical properties as well as their chemical (imbalance of nutrients) and biological health due to indiscriminate use of agrochemicals. Plant-associated microbes with their plant growth- promoting traits have enormous potential to solve these challenges and play a crucial role in enhancing plant biomass and crop yield under greenhouse and field conditions. The beneficial mechanisms of plant growth improvement include enhanced availability of nutrients (i.e., N, P, K, Zn and S), phytohormone modulation, biocontrol of phytopathogens and amelioration of biotic and abiotic stresses. This plant-microbe interplay is indispensable for sustainable agriculture and these microbes may perform essential role as an ecological engineer to reduce the use of chemical fertilizers. Various steps involved for production of solid-based or liquid biofertilizer formulation include inoculum preparation, addition of cell protectants such as glycerol, lactose, starch, a good carrier material, proper packaging and best delivery methods. In addition, recent developments of formulation include entrapment/microencapsulation, nano-immobilization of microbial bioinoculants and biofilm-based biofertilizers. Thus, inoculation with beneficial microbes has emerged as an innovative eco-friendly technology to feed global population with available resources. This review critically examines the current state-of-art on use of microbial strains as biofertilizers in different crop systems for sustainable agriculture and in maintaining soil fertility and enhancing crop productivity. It is believed that acquisition of advanced knowledge of plant-PGPR interactions, bioengineering of microbial communities to improve the performance of biofertilizers under field conditions, will help in devising strategies for sustainable, environment-friendly and climate smart agricultural technologies to deliver short and long terms solutions for improving crop productivity to feed the world in a more sustainable manner.

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“…Environmental applications of SOB encompass hydrogen sulfide detoxification, soil bioremediation and wastewater treatment. SOB capable of producing elemental sulfur are implicated in biological sulfur soil treatments, such as the restoration of saline alkali soils and the oxidation of minerals containing sulfide [ 30 , 31 , 32 , 33 ]. Recently, the utilization of sulfur-oxidizing bacteria as agents promoting plant growth has also been obtaining traction.…”

Section: Introductionmentioning

confidence: 99%

Sulfur-Oxidizing Bacteria Alleviate Salt and Cadmium Stress in Halophyte Tripolium pannonicum (Jacq.) Dobrocz.

Koźmińska,

Kamińska,

Hanus-Fajerska

2024

IJMS

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The aim of this study was to investigate how introducing halophilic sulfur-oxidizing bacteria (SOB) Halothiobacillus halophilus to the growth substrate affects the physiological and biochemical responses of the halophyte Tripolium pannonicum (also known as sea aster or seashore aster) under salt and cadmium stress conditions. This study assessed the plant’s response to these stressors and bacterial inoculation by analyzing various factors including the accumulation of elements such as sodium (Na), chloride (Cl), cadmium (Cd) and sulfur (S); growth parameters; levels of photosynthetic pigments, proline and phenolic compounds; the formation of malondialdehyde (MDA); and the plant’s potential to scavenge 2,2-Diphenyl-1-picrylhydrazyl (DPPH). The results revealed that bacterial inoculation was effective in mitigating the deleterious effect of cadmium stress on some growth criteria. For instance, stem length was 2-hold higher, the growth tolerance index was 3-fold higher and there was a 20% increase in the content of photosynthetic pigments compared to non-inoculated plants. Furthermore, the SOB contributed to enhancing cadmium tolerance in Tripolium pannonicum by increasing the availability of sulfur in the plant’s leaves, which led to the maintenance of an appropriate, about 2-fold-higher level of phenolic compounds (phenylpropanoids and flavonols), as well as chloride ions. The level of MDA decreased after bacterial application in all experimental variants except when both salt and cadmium stress were present. These findings provide novel insights into how halophytes respond to abiotic stress following inoculation of the growth medium with sulfur-oxidizing bacteria. The data suggest that inoculating the substrate with SOB has a beneficial effect on T. pannonicum’s tolerance to cadmium stress.

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Evaluating the Potential of Halothiobacillus Bacteria for Sulfur Oxidation and Biomass Production under Saline Soil

Cited by 13 publications

References 45 publications

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Biohydrogen production potential from the organic fraction of municipal solid waste in co- digestion with sewage sludge through high-solids dark fermentation

Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Sulfur-Oxidizing Bacteria Alleviate Salt and Cadmium Stress in Halophyte Tripolium pannonicum (Jacq.) Dobrocz.

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