air flotation harvesting

Air Flotation Harvesting

Dissolved Air Flotation - an overview | ScienceDirect Topics

Dissolved air flotation is also usually combined with stone flocculation and is one of the most energy consuming methods of harvesting, so, it has not been considered here. Again, the ability of at least some strains of B. braunii in self-floating eliminates the requirement of

Flotation harvesting of microalgae - ScienceDirect

Dispersed air flotation (DiAF) In dispersed air flotation (DiAF) air is introduced to the system through either a mechanical agitator or air injection through a porous medium . This is less energy intensive than dissolved air flotation (DAF), but has limited uses due to the relatively large bubble size in …

LOGAN, UTAH WASTEWATER TREATMENT PLANT Andrew R. …

Optimization of Dissolved Air Flotation for Algal Harvesting at the Logan, Utah Wastewater Treatment Plant Research being completed at the Logan, UT wastewater treatment plant could provide a locally-sourced gasoline replacement by collecting algae that grows naturally. This process

Critical evaluation and modeling of algal harvesting using ...

@article{osti_1141043, title = {Critical evaluation and modeling of algal harvesting using dissolved air flotation. DAF Algal Harvesting Modeling}, author = {Zhang, Xuezhi and Hewson, John C. and Amendola, Pasquale and Reynoso, Monica and Sommerfeld, Milton and Chen, Yongsheng and Hu, Qiang}, abstractNote = {In our study, Chlorella zofingiensis harvesting by dissolved air flotation (DAF) was ...

Critical evaluation and modeling of algal harvesting using ...

In this study, Chlorella zofingiensis harvesting by dissolved air flotation (DAF) was critically evaluated with regard to algal concentration, culture conditions, type and dosage of coagulants, and recycle ratio. Harvesting efficiency increased with coagulant dosage and leveled off at 81%, 86%, 91%, and 87% when chitosan, Al 3+, Fe 3+, and cetyl trimethylammonium bromide (CTAB) were used at ...

Optimization of thermal pre‐flocculation treatment for ...

Jan 25, 2019 · An orthogonal test showed that the harvesting efficiency was affected by the heating temperature and pH but not by the microalgal concentration or stirring rate. Under a heating temperature of 90 °C and pH 3, the optimal heat‐aided air flotation efficiency achieved for …

Algae Harvesting Using Flotation - Brown and Caldwell

This stone discusses dissolved-air flotation (DAF) applied to algae harvesting for the algae-to-biofuels industry. The DAF process is the most effective means of separating a relatively low concentration of algae from a large body of water.

The effect of bubble size on the efficiency and economics ...

The effect of bubble size and rise velocity on the efficiency of a foam flotation microalgae harvesting unit was determined. Three sparger and input airflow combinations were used: (1) limewood sparger with constant airflow, (2) ceramic flat plate sparger with constant airflow and (3) ceramic flat plate sparger with an oscillating airflow.

Improved Algal Harvesting Using Suspended Air Flotation

Foam flotation is an effective and energy efficient method of harvesting microalgae. This study has investigated the influence of growth phase and lipid content on harvesting efficiency.

Improved algal harvesting using suspended air flotation.

Improved algal harvesting using suspended air flotation. Wiley PE(1), Brenneman KJ, Jacobson AE. Author information: (1)Willits Wastewater Treatment Facility, 111 East Commercial Street, Willits, CA 95490, USA. [email protected] Current methods to remove algae from a liquid medium are energy intensive and expensive.

Investigation on the role of surfactants in bubble-algae ...

Feb 19, 2018 · In the algae harvesting by air flotation, the interaction between gas bubbles and algae is critical to the formation of stable bubble-algae aggregates, which is a fundamental step required for ...

(PDF) Flocculation Harvesting Techniques for Microalgae: A ...

The air flotation (or inverted sedimentation) harvesting process is based on the generation of up-r ising gas bubbles that bind to algal cells and induce their flotation to the liquid surface [19] .

Flotation: DAF, IAF, SAF

3. Induced air flotation (IAF) involves saturating the wastewater with air either directly in an aeration tank or by permitting air to enter on the suction side of a pump or with a venturi. The partial vacuum, which is applied, causes the dissolved air to come out of solution as minute bubbles. 4. Suspended air flotation (SAF) is a newer ...

Optimization of dissolved air flotation technique in ...

Harvesting is a crucial step in biofuel production from microalgae. The expense of harvesting operation is estimated to be 20%–30% of the total biofuels production cost. Dissolved air flotation (DAF) is a well known technology for separating solid particles from liquid streams such as wastewater.

Designing a cost effective microalgae harvesting strategy ...

Dassey, Adam James, "Designing a cost effective microalgae harvesting strategy for biodiesel production with electrocoagulation and dissolved air flotation" (2013). LSU Doctoral Dissertations . 3997.

Progress and Perspectives of Large Scale Algae Biomass ...

Summary of Algae Harvesting Technologies Table Title Parameters Sedimentation Dissolved Air flotation Membrane Filtration Centri-fugation Process illustration Concentration factor <15 10~30 5~20 >100 Separation efficiency >90% >85% ~100% >80% Biomass recovery ~80% ~75% ~85% ~75% Solid content of harvested

Harvesting microalgal biomass using magnesium coagulation ...

Oct 01, 2016 · Read "Harvesting microalgal biomass using magnesium coagulation-dissolved air flotation, Biomass and Bioenergy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Effective harvesting of microalgae by coagulation–flotation

Dispersed air flotation test. Flotation experiments were carried out using a columnar 150 ml flotation cell (45 mm in diameter and 100 mm in height). There is a porous gas diffusor with a nominal pore diameter placing at the column bottom, just above the gas inlet port. ... The batch flotation harvesting tests were conducted in triplicate with ...

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