Harvesting of microalgae Desmodesmus sp. F51 by bioflocculation with bacterial bioflocculant

Ndikubwimana, Theoneste; Zeng, Xianhai; Liu, Yu; Chang, Jo Shu; Lu, Yinghua

doi:10.1016/j.algal.2014.09.004

Cited by 70 publications

(35 citation statements)

References 49 publications

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“…The use of microorganisms for the recovery of microalgae biomass has been investigated (Table 3) [11,19,114,136,173,197,198]. This method works by the addition of microorganisms to the culture which adhere to the microalgae cells causing the weight to increase and resulting in settlement of the cells to the bottom of the vessel.…”

Section: Bio-flocculation Harvesting Methodsmentioning

confidence: 99%

“…using the bio-flocculent Paenibacillus polymixa. Ndikubwimana et al [197] harvested the microalgae species Desmodesmus sp. using the bacterium Bacillus licheniformis with a 98% removal efficiency.…”

Section: Bio-flocculation Harvesting Methodsmentioning

confidence: 99%

“…increased with increasing pH from 5 to 11. Ndikubwimana et al [197] noted that the flocculation efficiency of Desmodesmus sp. increased from 43 to 98% using the bacterium Bacillus licheniformis as the pH decreased from 7.2 to 3.…”

Section: Phmentioning

confidence: 99%

See 2 more Smart Citations

Microalgae Harvesting Methods for Industrial Production of Biodiesel: Critical Review and Comparative Analysis

hattab¹,

Ghaly²,

Hammoud³

2015

J Fundam Renewable Energy Appl

119

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Microalgae biomass can be used to produce numerous value added products such as biodiesel, bioethanol, biogas and bio hydrogen, fish feed, animal feed, human food supplements and skin care products. Production of value added products from microalgae biomass requires growing and recovery of the algae biomass and extraction and downstream processing of the desired product. However, the major obstacle for using microalgae biomass on an industrial-scale for the production of biodiesel and other value added products is the dewatering step which accounts for 20-30% of the total costs associated with microalgae production and processing. The aim of this study was to review the current methods used for harvesting and concentrating microalgae and to perform a comparative analysis in order to determine the most efficient and economically viable dewatering methods for large scale processing of microalgae biomass. The harvesting techniques investigated included sedimentation, vacuum filtration, pressure filtration, cross flow filtration, disc stack centrifugation, decanter centrifuge, dispersed air floatation, dissolved air flotation, fluidic oscillation, inorganic flocculation, organic flocculation, auto-flocculation, bio-flocculation electrolytic coagulation, electrolytic flocculation and electrolytic floatation. Eight criteria were used for evaluation of these microalgae harvesting techniques: (a) dewatering efficiency (b) cost (c) toxicity (d) suitability for industrial scale (e) time (f) species specificity (g) reusability of media and (h) maintenance. Each criterion was assigned a score between 7 and 15 based on its degree of importance. Higher values were given to the criteria that were deemed most important for development of an efficient and economic large scale dewatering method for microalgae whereas lower values were given to criteria that were deemed necessary for determining a suitable method but were considered less important. The results indicated that of the 16 methods evaluated, 4 scored values of 80/100 and above and were deemed suitable for harvesting microalgae on an industrial scale. Three were physical techniques (disc stack centrifuge (87/100), cross flow filtration (84/100), decanter centrifugation (82/100)) and the forth was the organic flocculation (80) method. These techniques were deemed suitable for large scale use because of their effectiveness, low operational costs, suitability for numerous species, rapidness, minimal maintenance requirement and being environmentally friendly. The other methods were deemed unsuitable because they are not effective in dewatering a wide array of microalgae species, not suited for large volumes, costly and require high maintenance. Although each of the optimum techniques was deemed suitable for harvesting of microalgae on its merit, a combination of methods can also be used to enhance the recovery efficiency and improve the economics. The use of organic flocculation as an initial harvesting step to concentrate the algae suspension and the centrifugation (or filt...

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Section: Bio-flocculation Harvesting Methodsmentioning

confidence: 99%

Section: Bio-flocculation Harvesting Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Microalgae Harvesting Methods for Industrial Production of Biodiesel: Critical Review and Comparative Analysis

hattab¹,

Ghaly²,

Hammoud³

2015

J Fundam Renewable Energy Appl

119

View full text Add to dashboard Cite

show abstract

“…Dewatering costs could be greatly reduced with bioflocculation compared to other conventional dewatering technologies available, because much less capital and maintenance costs are incurred. Moreover, bioflocculation of microalgae is of high efficiency [8][9][10][11][12] and little or no energy consumption is necessary during the process compared to centrifugation method widely used in industry [13].…”

Section: Introductionmentioning

confidence: 99%

Microalgae biomass harvesting by bioflocculation-interpretation by classical DLVO theory

Ndikubwimana

Zeng

et al. 2015

Biochemical Engineering Journal

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“…11 Furthermore, lamentous fungi had a strong occulation effect on microalgae due to their large surface area and easy solid-liquid separation, which was convenient for the recycling of microalgae. 12 Ndikubwimana et al reported a yield of 95% for microalgae with the formation of cell pellets, 13 and Prajapati et al found A. lentulus resulting in 98% harvesting at low glucose level (5.0 g L À1 ) within 52 h. 14 In terms of economic costs, effective wastewater treatment performance and the good sources of biofuels, the co-culture system of fungi and microalgae had great potential in wastewater treatment. Generally both fungi and microalgae could decolorize dyes by the adsorption or degradation.…”

Section: Introductionmentioning

confidence: 99%

Decolorization and degradation analysis of Disperse Red 3B by a consortium of the fungus Aspergillus sp. XJ-2 and the microalgae Chlorella sorokiniana XJK

Tang

et al. 2019

RSC Adv.

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Disperse Red 3B, an anthraquinone dye, was decolorized by a consortium, which was constituted of the fungus (Aspergillus sp. XJ-2) and the microalgae (Chlorella sorokiniana XJK). The consortium performed better than the single system in terms of decolorization and nutrient removal simultaneously in the simulated wastewater of Dispersed Red 3B. The decolorization rate could reach 98.09% by the consortium under the optimized conditions. The removal rate of COD (Chemical Oxygen Demand), TP (Total Phosphorus), and ammonia nitrogen reached 93.9%, 83.9% and 87.6%. Also, the consortium could tolerate higher salt and dye concentration than the single system did. In this co-cultural system, the lignin peroxidase and manganese peroxidase enzyme activities contributed to the degradation of Disperse Red 3B, which reached 86.7 U L À1 and 122.5 U L À1 . The result of fermentation liquid analysis with UV-vis, FTIR and GC-MS showed that the colored functional group of the dye was broken and the Dispersed Red 3B was degraded into small molecular compounds with low toxicity. It was suggested that degradation plays a major role during the color removal process. The consortium exhibited greater potential in terms of color removal and water pollutant removal than the separate system did.

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Harvesting of microalgae Desmodesmus sp. F51 by bioflocculation with bacterial bioflocculant

Cited by 70 publications

References 49 publications

Microalgae Harvesting Methods for Industrial Production of Biodiesel: Critical Review and Comparative Analysis

Microalgae Harvesting Methods for Industrial Production of Biodiesel: Critical Review and Comparative Analysis

Microalgae biomass harvesting by bioflocculation-interpretation by classical DLVO theory

Decolorization and degradation analysis of Disperse Red 3B by a consortium of the fungus Aspergillus sp. XJ-2 and the microalgae Chlorella sorokiniana XJK

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