Cyanobacteria as a source of biofertilizers for sustainable agriculture

Joshi, H. B.; Shourie, Abhilasha; Singh, Anamika

doi:10.1016/b978-0-12-819311-2.00025-5

Cited by 24 publications

(9 citation statements)

References 67 publications

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“…Along with efficiency enhancement of wastewater treatment, resource recovery and carbon capture, the biorefinery simultaneously generates high‐value products like biofuels, fish and animal feed, pigments, pharmaceuticals, nutraceuticals, biofertilizers, and industrially useful metabolites. [ 41 ] The value chain components of an integrated wastewater microalgal bioremediation–biorefinery model include systems and processes for microalgae cultivation, bioremediation, harvesting, drying and dewatering, cell disruption, fractionation, lipid extraction, biofuel production, and value‐added compounds production. A hypothesized model of an integrated wastewater microalgal bioremediation–biorefinery is illustrated in Figure 1 , and a literature‐based account of its processes is presented further to create a broad outline of the model.…”

Section: An Integrated Wastewater Microalgal Bioremediation‐biorefine...mentioning

confidence: 99%

Integration of Microalgae‐Based Wastewater Bioremediation–Biorefinery Process to Promote Circular Bioeconomy and Sustainability: A Review

Singh

Shourie

Mazahar

2022

CLEAN Soil Air Water

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Bioremediation of wastewater using microalgae is inexpensive, energy efficient, and effective in pollutant reduction as compared to conventional wastewater treatment technologies. Wastewater is a huge resource of minerals, nutrients, bioenergy, and valuable organic compounds and can be used for cultivation of microalgae. The microalgal biomass can be further used as biorefinery feedstock to produce biofuels and commercially important high‐value products. The potential of microalgae toward bioremediation and biorefinery applications presents the avenues for integrating the two processes to support circular bioeconomy and sustainability. This review presents a holistic view of integration of bioremediation and biorefinery processes using microalgae for deriving multiple benefits like pollutant removal, resource recovery, biofuel production, and generation of high‐value commercial products. The current status of high‐throughput microalgal screening technologies is also discussed since the selection of suitable microalgal strains is crucial for the application. The review further summarizes various processes involved in bioremediation and biorefinery systems such as cultivation, bioremediation, harvesting, and downstream processing. Recent trends in microalgal strain improvement for bioremediation and biorefinery applications through genetic engineering, bioinformatics, omics technologies, and genome editing tools are highlighted, while addressing the risks, biosafety issues, and regulatory affairs associated with genetically modified algae.

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Section: An Integrated Wastewater Microalgal Bioremediation‐biorefine...mentioning

confidence: 99%

Integration of Microalgae‐Based Wastewater Bioremediation–Biorefinery Process to Promote Circular Bioeconomy and Sustainability: A Review

Singh

Shourie

Mazahar

2022

CLEAN Soil Air Water

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“…The prior studies reported that cyanobacteria have great potential for salt-affected soil remediation (Chamizo et al 2018b. Cyanobacteria can produce organic carbon and extracellular polymeric materials, including exopolysaccharides (EPS) and extracellular proteins in the soil (Joshi et al 2020. By biosorption via exocellular polysaccharides and organic matters, they reduce heavy metal mobility and toxicity (Joshi et al 2020).…”

Section: Heavy Metal Concentration In Plantmentioning

confidence: 99%

Bioaugmentation and Bioaugmentation – Assisted Phytoremediation of Heavy Metals Contaminated Soil By a Synergistic Effect of Cyanobacteria Inoculation, Biochar, and Purtolaca Oleracea

Zanganeh

Heidari

Sepehr

et al. 2021

Preprint

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In recent decades, soil contamination with heavy metals has become an environmental crisis due to their long-term stability and adverse biological effects. Therefore, bioremediation is an eco-friendly technology to remediate contaminated soil, that its efficiency requires further research. This study was conducted to comparatively investigate two strategies, including bioaugmentation by using Oscillatoria sp and bioaugmentation assisted phytoremediation by using Oscillatoria sp -portulaca oleracea for the bioremediation of heavy metal (Cr (III), Cr (VI), Fe, Al, and Zn) contaminated soil at 180 days. To facilitate the remediation process, various quantities of biochar (0, 0.5, 2, and 5% (w/w)) were used in the experiments. The results of the bioaugmentation showed a significant improvement in chlorophyll a, nitrogen, organic carbon contents of soil and decrease all heavy metal bioavailability and EC of soil. The remediation efficiency test using plants proved the success of remediation treatments. Moreover, the findings of bioaugmentation-assisted phytoremediation displayed an improvement in soil fertility and a substantial reduction in the bioavailable fraction of heavy metals, especially in soil amended with 5% biochar. Cyanobacteria inoculation and biochar amendment dramatically enhanced the root lengths and shoot heights of portulaca oleracea while it significantly decreased their heavy metal accumulation compared to the control. For all heavy metals, TF and BAC (except Zn) values were found to be less than 1.0 at all treatments, illustrated the successful phytoextraction by the P. In conclusion, cyanobacteria inoculation along with biochar addition enhanced the TI quantities while diminished BAC and BCF values, suggesting the feasibility their applying in heavy metal contaminated soil for the facilitation of phytoremediation and their ability in pollutant immobilization.

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“…PHB content was expressed on biomass weight basis (gPHB/gbiomass %). Specific PHB productivity (gPHB gbiomass -1 d -1 ) has been calculated based on the cultivation period (3,5,7,11, or 15 d) as follows:…”

Section: Phb Content Determinationmentioning

confidence: 99%

“…They are widely distributed throughout different aquatic and terrestrial environments, in which they play a key role in carbon and nitrogen fixation, thus impacting biogeochemical cycles in aquatic ecosystems as well as improving soil fertility [3]. Cyanobacteria are photoautotrophic and grow using CO2 as the sole source of carbon, although some strains have displayed an heterotrophic behavior especially when adapting to dark or semi-dark conditions, thus using other C-feedstocks like sugars under mixotrophic or heterotrophic regimes [4].…”

Section: Introductionmentioning

confidence: 99%