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dissolved air flotation microalgae harvesting

dissolved air flotation microalgae harvesting

Flotation harvesting of microalgae - ScienceDirect

2016-5-1  Dissolved air flotation (DAF) In dissolved air flotation (DAF) a portion of the water that has been through separation is recycled and pressurized . This recycle ratio governs the amount of bubbles in the operation and is typically 5–15% and is pressurized in the range of 400–650 kPa . When the saturated water depressurizes back to atmospheric pressure, it releases excess air, due to the new

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Coagulation and dissolved air flotation as a harvesting ...

2019-12-1  Dissolved air flotation (DAF) is a traditional type of flotation and has been reported as an efficient microalgae harvesting method [, , , ]. DAF is a method based on the air micro-bubble generation to promote the rise of microalgae flocs to the system´s

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Coagulation and dissolved air flotation as a harvesting ...

Microalgae harvesting is the major bottleneck for biomass production on a large-scale. In this study, coagulation followed by dissolved air flotation (DAF) was used as a harvesting method for Chlorella sorokiniana cultivated in wastewater. The harvesting performance was evaluated using four coagulants (aluminum sulphate, ferric chloride, Tanfloc SG and Zetag 8185) usually used in water or wastewater

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Harvesting of microalgae using flocculation combined

2014-3-11  This study explored efficient methods of harvesting the Tetraselmis sp. KCTC12236BP using flocculation and dissolved air flotation. Concentration ranges of flocculation agents were optimized using jar tests (batch flocculation experiments) using inorganic (aluminum sulfate, ferric sulfate) and organic (chitosan) flocculants in a pH range of 4 ∼ 10.

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Harvesting microalgal cells by dissolved air flotation ...

As a new and effective solid/liquid or liquid/liquid separation process, dissolved air flotation techniques had been widely used in the treatment of industrial wastewater for the removal or separation of oil, microorganisms and other ultra fines. A main disadvantage of the process was the high cost of water saturation required for high quality bubble formation. The possibilities of harvesting ...

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Optimization of dissolved air flotation technique in ...

2015-2-18  Dissolved air flotation (DAF) is a well known technology for separating solid particles from liquid streams such as wastewater. This technology has been introduced for microalgae harvesting in the past few years. However, the high operating cost has been a hurdle to commercialization of this technology for microalgae

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Designing a cost effective microalgae harvesting strategy ...

2020-10-13  Designing a cost effective microalgae harvesting strategy for biodiesel production with electrocoagulation and dissolved air flotation Adam James Dassey Louisiana State University and Agricultural and Mechanical College Follow this and additional works at:https://digitalcommons.lsu.edu/gradschool_dissertations

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Efficient microalgae harvesting using a thermal

2019-8-1  Flotation can be generally divided into dissolved air flotation (DAF), dispersed air flotation (DiAF), and electro flotation (EF) (Ndikubwimana et al. 2016). Foam flotation, a type of DiAF, shows great potential as a microalgal biomass harvesting and enrichment method (Alkarawi et al. 2018).

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Investigating microalgae cell-microsphere interactions ...

2018-9-15  Based on the ballast concept, a ballasted dissolved air flotation (BDAF) method was developed more recently to harvest microalgae using buoyant microspheres instead of air bubbles . The underlying working principle of the BDAF method is quite straightforward (see Fig. S1).

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Flotation: A promising microalgae harvesting and ...

Dispersed air flotation was found to be less energy consuming. Moreover, Jameson cell flotation and dispersed ozone flotation are believed to be energy efficient microalgae flotation approaches. Microalgae harvesting and dewatering by flotation is still at embryonic stage, therefore extended studies with the focus on life cycle assessment ...

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Harvesting microalgal cells by dissolved air flotation ...

As a new and effective solid/liquid or liquid/liquid separation process, dissolved air flotation techniques had been widely used in the treatment of industrial wastewater for the removal or separation of oil, microorganisms and other ultra fines. A main disadvantage of the process was the high cost of water saturation required for high quality bubble formation. The possibilities of harvesting ...

Get Price

Harvesting Microalgae Biomass by Instant Dissolved

A instant air dissolution flotation method was used to harvest microalgal cells from culture to evaluate its feasibility. Effects of microalgae cell density, coagulant dosage, flocculant dosage, surfactant dosage and duration of air dissolution on recovery rate were studied by orthogonal experiment. The results show that the optimal recovery rate reaches 89.57% under one of the test ...

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Harvesting microalgal cells by continuous dissolve

2003-1-1  Dissolved air flotation(DAF) is a novel solid-liquid separation technique, which is characterized of inducing fine gas bubbles mechanicallg to form bubble-cell aggregates, lowing density of agglomerates and forcing them to liquid surface thus realizing cells harvesting process.

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Designing a cost effective microalgae harvesting strategy ...

2020-10-13  designing a cost effective microalgae harvesting strategy for biodiesel production with electrocoagulation and dissolved air flotation a dissertation

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Comparison of flotation techniques to harvest

Dissolved and dispersed air flotation and foam fractionation will be employed and evaluated by harvesting efficiency, concentration factor and bubble size. Flotation will be compared to sedimentation and a cost analysis will compare the economic viability of

Get Price

Efficient microalgae harvesting using a thermal

2019-8-1  Flotation can be generally divided into dissolved air flotation (DAF), dispersed air flotation (DiAF), and electro flotation (EF) (Ndikubwimana et al. 2016). Foam flotation, a type of DiAF, shows great potential as a microalgal biomass harvesting and enrichment method (Alkarawi et al. 2018).

Get Price

Flotation: A promising microalgae harvesting and ...

Dispersed air flotation was found to be less energy consuming. Moreover, Jameson cell flotation and dispersed ozone flotation are believed to be energy efficient microalgae flotation approaches. Microalgae harvesting and dewatering by flotation is still at embryonic stage, therefore extended studies with the focus on life cycle assessment ...

Get Price

Development of a harvesting technique for large

2017-1-23  Dissolved air flotation also showed a flocculation efficiency of same magnitude after 7 h, but with 10 mg L −1 of alum. Thus electro-flotation required a profoundly higher voltage with increasing culture volume, whereas for dissolved air flotation

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A review on microalgae cultivation and harvesting,

2020-12-1  Dispersed air flotation on the other hand uses a sparger to generate air bubble which in turn have lower energy demand when compared to dissolved air flotation . The third method is electro-flotation, which applies electrolysis operation to generate microbubbles from its electrode to trap free floating microalgae [ 70 ].

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Harvesting microalgal cells by dissolved air flotation ...

As a new and effective solid/liquid or liquid/liquid separation process, dissolved air flotation techniques had been widely used in the treatment of industrial wastewater for the removal or separation of oil, microorganisms and other ultra fines. A main disadvantage of the process was the high cost of water saturation required for high quality bubble formation. The possibilities of harvesting ...

Get Price

Harvesting microalgal cells by continuous dissolve air ...

2003-1-1  Dissolved air flotation(DAF) is a novel solid-liquid separation technique, which is characterized of inducing fine gas bubbles mechanicallg to form bubble-cell aggregates, lowing density of agglomerates and forcing them to liquid surface thus realizing cells harvesting process.

Get Price

Comparison of flotation techniques to harvest

Dissolved and dispersed air flotation and foam fractionation will be employed and evaluated by harvesting efficiency, concentration factor and bubble size. Flotation will be compared to sedimentation and a cost analysis will compare the economic viability of

Get Price

Efficient microalgae harvesting using a thermal

2019-8-1  Flotation can be generally divided into dissolved air flotation (DAF), dispersed air flotation (DiAF), and electro flotation (EF) (Ndikubwimana et al. 2016). Foam flotation, a type of DiAF, shows great potential as a microalgal biomass harvesting and enrichment method (Alkarawi et al. 2018).

Get Price

Flotation: A promising microalgae harvesting and ...

Dispersed air flotation was found to be less energy consuming. Moreover, Jameson cell flotation and dispersed ozone flotation are believed to be energy efficient microalgae flotation approaches. Microalgae harvesting and dewatering by flotation is still at embryonic stage, therefore extended studies with the focus on life cycle assessment ...

Get Price

Development of a harvesting technique for large-scale ...

2017-1-23  Dissolved air flotation also showed a flocculation efficiency of same magnitude after 7 h, but with 10 mg L −1 of alum. Thus electro-flotation required a profoundly higher voltage with increasing culture volume, whereas for dissolved air flotation

Get Price

A Comprehensive Overview on Various Method of

2014-11-26  Harvesting microalgae is one of the most challenging tasks. Harvesting of algae from water or other liquids is currently a ... Dissolved air flotation (DAF) is a process where small bubbles are generated, with a mean size of 40 μm and ranging from 10 to 100 μm [12]. Dissolved air flotation

Get Price

A review on microalgae cultivation and harvesting,

2020-12-1  Dispersed air flotation on the other hand uses a sparger to generate air bubble which in turn have lower energy demand when compared to dissolved air flotation . The third method is electro-flotation, which applies electrolysis operation to generate microbubbles from its electrode to trap free floating microalgae [ 70 ].

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Development of an efficient electroflocculation

2010-6-25  Therefore, there is great interest in developing new efficient approaches for harvesting microalgae. RESULT: An efficient electroflocculation method integrated with dispersed-air flotation has been developed for harvesting Botryococcus braunii. The recovery efficiency of B. braunii reached 93.6% after 30 min using an electroflocculation process.

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李彦鹏 - 长安大学 - 水利与环境学院 - X-MOL

Investigating microalgae cell-microsphere interactions during microalgae harvesting by ballasted dissolved air flotation through XDLVO theory. Biochemical Engineering Journal, 2018, 137(9): 294-304. (SCI,中科院二区) Kaiwei Xu, Xiaotong Zou, Hao Wen, Yating Xue, Shuangfeng Zhao, Yanpeng Li*.

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Harvesting microalgal cells by dissolved air flotation ...

As a new and effective solid/liquid or liquid/liquid separation process, dissolved air flotation techniques had been widely used in the treatment of industrial wastewater for the removal or separation of oil, microorganisms and other ultra fines. A main disadvantage of the process was the high cost of water saturation required for high quality bubble formation. The possibilities of harvesting ...

Get Price

Optimization of dissolved air flotation technique in

Dissolved air flotation (DAF) is a well known technology for separating solid particles from liquid streams such as wastewater. This technology has been introduced for microalgae harvesting in the past few years. However, the high operating cost has been a hurdle to commercialization of this technology for microalgae dewatering.

Get Price

Comparison of flotation techniques to harvest

Dissolved and dispersed air flotation and foam fractionation will be employed and evaluated by harvesting efficiency, concentration factor and bubble size. Flotation will be compared to sedimentation and a cost analysis will compare the economic viability of

Get Price

"Designing a cost effective microalgae harvesting

Furthermore, a continuous multistage algae harvester using EC and dissolved air flotation (DAF) for Stage 1 harvesting and centrifugation for Stage 2 dewatering was designed. It was determined throughout the testing that greater EC costs for improved harvesting efficiencies were necessary to offset the large energy requirements of the DAF.

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A Comprehensive Overview on Various Method of

2014-11-26  Harvesting microalgae is one of the most challenging tasks. Harvesting of algae from water or other liquids is currently a ... Dissolved air flotation (DAF) is a process where small bubbles are generated, with a mean size of 40 μm and ranging from 10 to 100 μm [12]. Dissolved air flotation

Get Price

Flotation: A promising microalgae harvesting and ...

Dispersed air flotation was found to be less energy consuming. Moreover, Jameson cell flotation and dispersed ozone flotation are believed to be energy efficient microalgae flotation approaches. Microalgae harvesting and dewatering by flotation is still at embryonic stage, therefore extended studies with the focus on life cycle assessment ...

Get Price

Development of a harvesting technique for large-scale ...

2017-1-23  Dissolved air flotation also showed a flocculation efficiency of same magnitude after 7 h, but with 10 mg L −1 of alum. Thus electro-flotation required a profoundly higher voltage with increasing culture volume, whereas for dissolved air flotation

Get Price

A review on microalgae cultivation and harvesting,

2020-12-1  Dispersed air flotation on the other hand uses a sparger to generate air bubble which in turn have lower energy demand when compared to dissolved air flotation . The third method is electro-flotation, which applies electrolysis operation to generate microbubbles from its electrode to trap free floating microalgae [ 70 ].

Get Price

PULSED FIELD ELECTROFLOTATION FOR HARVESTING

2015-10-15  harvesting microalgae like centrifugation, microfiltration, and foam fractionation are extremely energy intensive. Reducing the energy input for harvesting microalgae would ... Dissolved air flotation and electroflotation are able to produce substantial quantities of bubbles with diameters less than 100 µm (Sarkar et al., 2010).

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SURFACTANT-AIDED DISPERSED AIR FLOTATION AS A

2019-11-29  Table 6.2. Dispersed air flotation aided foam fractionation variables and levels. .....215 Table 6.3. Box-Behnken design matrix for harvesting microalgae with recovery (R) and enrichment ratio (ER) from experiments. .....217 Table 6.4. Reduced model

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