Microalgae as Bio-fertilizers for Rice Growth and Seed Yield Productivity

Dineshkumar, R.; Kumaravel, R.; Gopalsamy, J.; Sikder, Mohammad Nurul Azim; Sampathkumar, P.

doi:10.1007/s12649-017-9873-5

Cited by 159 publications

(75 citation statements)

References 15 publications

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“…Microalgae can be applied directly in soil [24][25][26][27] or through foliar application [23,25,28]. For instance, Dineshkumar et al (2018) produced Chlorella vulgaris and Spirulina platensis to employ them as fertilizer in rice growth experiments [29]. As a result, the application with microalgae improved the plant growth rate (in dry weight) by 69% and 71% compared to the control (soil alone), respectively for Chlorella vulgaris and Spirulina platensis.…”

Section: Introductionmentioning

confidence: 99%

Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Jimenez¹,

Μάρκου²,

Tayibi

et al. 2020

Applied Sciences

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Anaerobic Digestion (AD) is a process that is well-known and fast-developing in Europe. AD generates large amounts of digestate, especially in livestock-intensive areas. Digestate has potential environmental issues due to nutrients (such as nitrogen) lixiviation or volatilization. Using liquid digestate as a nutrient source for microalgae growth is considered beneficial because digestate could be valorized and upgraded by the production of an added value product. In this work, microalgal biomass produced using liquid digestate from an agricultural biogas plant was investigated as a slow-release fertilizer in tomatoes. Monoraphidium sp. was first cultivated at different dilutions (1:20, 1:30, 1:50), in indoor laboratory-scale trials. The optimum dilution factor was determined to be 1:50, with a specific growth rate of 0.13 d−1 and a complete nitrogen removal capacity in 25 days of culture. Then, outdoor experiments were conducted in a 110 dm3 vertical, closed photobioreactors (PBRs) in batch and semi-continuous mode with 1:50 diluted liquid digestate. During the batch mode, the microalgae were able to remove almost all NH4+ and 65 (±13) % of PO43−, while the microalgal growth rate reached 0.25 d−1. After the batch mode, the cultures were switched to operate under semi-continuously conditions. The cell densities were maintained at 1.3 × 107 cells mL−1 and a biomass productivity around 38.3 mg TSS L−1 d−1 during three weeks was achieved, where after that it started to decline due to unfavorable weather conditions. Microalgae biomass was further tested as a fertilizer for tomatoes growth, enhancing by 32% plant growth in terms of dry biomass compared with the control trials (without fertilization). Similar performances were achieved in tomato growth using synthetic fertilizer or digestate. Finally, the leaching effect in soils columns without plant was tested and after 25 days, only 7% of N was leached when microalgae were used, against 50% in the case of synthetic fertilizer.

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Section: Introductionmentioning

confidence: 99%

Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Jimenez¹,

Μάρκου²,

Tayibi

et al. 2020

Applied Sciences

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“…based on enzymatic hydrolysis of the cell wall [ 51 , 61 ], still suffer for expensive enzyme production. To significantly reduce energy penalty of the production process, the waste biomass can be directed to anaerobic digestion and production of biogas, fertilizers, soil amendments or feeds [ 13 , 62 , 85 ].…”

Section: Main Textmentioning

confidence: 99%

“…So far industrial applications include production of bioactive compounds [ 10 ], recombinant proteins [ 11 ], next generation biofuels and wastewater treatment [ 12 ]. Once target products extracted, the residual biomass can be further processed into livestock feed, organic fertilizer and biostimulants, or used for energy cogeneration [ 13 – 15 ]; therefore, biorefinery processes applied to mono-species cultivation can yield a large variety of resources.…”

Section: Introductionmentioning

confidence: 99%

Biomass from microalgae: the potential of domestication towards sustainable biofactories

et al. 2018

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Interest in bulk biomass from microalgae, for the extraction of high-value nutraceuticals, bio-products, animal feed and as a source of renewable fuels, is high. Advantages of microalgal vs. plant biomass production include higher yield, use of non-arable land, recovery of nutrients from wastewater, efficient carbon capture and faster development of new domesticated strains. Moreover, adaptation to a wide range of environmental conditions evolved a great genetic diversity within this polyphyletic group, making microalgae a rich source of interesting and useful metabolites. Microalgae have the potential to satisfy many global demands; however, realization of this potential requires a decrease of the current production costs. Average productivity of the most common industrial strains is far lower than maximal theoretical estimations, suggesting that identification of factors limiting biomass yield and removing bottlenecks are pivotal in domestication strategies aimed to make algal-derived bio-products profitable on the industrial scale. In particular, the light-to-biomass conversion efficiency represents a major constraint to finally fill the gap between theoretical and industrial productivity. In this respect, recent results suggest that significant yield enhancement is feasible. Full realization of this potential requires further advances in cultivation techniques, together with genetic manipulation of both algal physiology and metabolic networks, to maximize the efficiency with which solar energy is converted into biomass and bio-products. In this review, we draft the molecular events of photosynthesis which regulate the conversion of light into biomass, and discuss how these can be targeted to enhance productivity through mutagenesis, strain selection or genetic engineering. We outline major successes reached, and promising strategies to achieving significant contributions to future microalgae-based biotechnology.

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“…In addition, the impact of C. vulgaris and Spirulina platensis , grown in cow manure, on maize crop was studied with various treatments. The results showed that both microalgae treatments increased the yield and growth of maize by up to 51.1% at 60 days after planting …”

Section: Introductionmentioning

confidence: 99%

“…Microalgae proved to be very efficient in the removal of nutrients (particularly nitrogen and phosphorus) from several effluents . This microalgae‐based wastewater treatment process generates valuable biomass for biofuel production as well as for biofertilizers and bioplastics, with a considerable reduction of the biomass production costs. Scientists are working on new technologies and strategies to reach the economic and environmental sustainability of microalgae biotechnology.…”

Section: Introductionmentioning

confidence: 99%

Scenedesmus obliquusmicroalga‐based biorefinery – from brewery effluent to bioactive compounds, biofuels and biofertilizers – aiming at a circular bioeconomy

Ferreira

Ribeiro

Ferreira

et al. 2019

Biofuels Bioprod Bioref

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The circular bioeconomy concept relies on the exploitation of wastes as a feedstock of different biotechnological processes to obtain, as much as possible, a huge spectrum of biochemical components through a biorefinery platform. This work deals with the treatment of brewery effluent through the cultivation of Scenedesmus obliquus microalga and the use of the biomass in a complex biorefinery. The treatment proved efficient in the removal of nutrients (N, P and COD removals of 88, 30 and 71% respectively). Several compounds and products were obtained from the biomass, such as: (a) phenols (0.249-1.016 mg GAE mL −1 ) and flavonoids (0.05-0.167 mg CE mL −1 ) by subcritical water extraction (SWE) at 120 °C, the extraction efficiency being five times higher at 200 °C; (b) biohydrogen by dark fermentation (67.1 mL H 2 g VS −1 ); (c) bio-oil (64%), biochar (30%) and biogas (6%) by pyrolysis; and (d) enhanced capacity of germination/growth of wheat and barley seeds by S. obliquus culture and biomass (pellet, after centrifugation); better results were obtained with the biomass cultivated in brewery effluent (when compared with synthetic medium), and the biomass pellet was better than the whole culture; barley seeds 1170 A Ferreira et al.In the Field: Scenedesmus obliquus microalga-based biorefinery aiming at a circular bioeconomy treated with the pellet from the brewery effluent had the highest germination index (GI) of 85 compared with the control (tap water) GI of 35. The innovative study emphasis was on reducing microalgae production costs, providing environmental benefits in a biorefinery-based S. obliquus platform.

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Microalgae as Bio-fertilizers for Rice Growth and Seed Yield Productivity

Cited by 159 publications

References 15 publications

Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Production of Microalgal Slow-Release Fertilizer by Valorizing Liquid Agricultural Digestate: Growth Experiments with Tomatoes

Biomass from microalgae: the potential of domestication towards sustainable biofactories

Scenedesmus obliquusmicroalga‐based biorefinery – from brewery effluent to bioactive compounds, biofuels and biofertilizers – aiming at a circular bioeconomy

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