Serial lantern-shaped draft tube enhanced flashing light effect for improving CO2 fixation with microalgae in a gas-lift circumflux column photobioreactor

Ye, Qing; Cheng, Jun; Guo, Wangbiao; Xu, Junchen; Li, Ké; Zhou, Junhu

doi:10.1016/j.biortech.2018.01.127

Cited by 42 publications

(10 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By attaching an internal light column, a novel column PBR design enhanced light intensity in the column and increased biomass production by 82.4% ( Li et al, 2018 ). Another design employed a serial lantern-shaped draft tube that improves flashing light in column PBR ( Ye et al, 2018 ). This yielded a 74% increment in biomass production.…”

Section: Microalgal Biomass Manufacturing Technologymentioning

confidence: 99%

Microalgal Biomass as Feedstock for Bacterial Production of PHA: Advances and Future Prospects

Tan

Nadir

Sudesh

2022

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

The search for biodegradable plastics has become the focus in combating the global plastic pollution crisis. Polyhydroxyalkanoates (PHAs) are renewable substitutes to petroleum-based plastics with the ability to completely mineralize in soil, compost, and marine environments. The preferred choice of PHA synthesis is from bacteria or archaea. However, microbial production of PHAs faces a major drawback due to high production costs attributed to the high price of organic substrates as compared to synthetic plastics. As such, microalgal biomass presents a low-cost solution as feedstock for PHA synthesis. Photoautotrophic microalgae are ubiquitous in our ecosystem and thrive from utilizing easily accessible light, carbon dioxide and inorganic nutrients. Biomass production from microalgae offers advantages that include high yields, effective carbon dioxide capture, efficient treatment of effluents and the usage of infertile land. Nevertheless, the success of large-scale PHA synthesis using microalgal biomass faces constraints that encompass the entire flow of the microalgal biomass production, i.e., from molecular aspects of the microalgae to cultivation conditions to harvesting and drying microalgal biomass along with the conversion of the biomass into PHA. This review discusses approaches such as optimization of growth conditions, improvement of the microalgal biomass manufacturing technologies as well as the genetic engineering of both microalgae and PHA-producing bacteria with the purpose of refining PHA production from microalgal biomass.

show abstract

Section: Microalgal Biomass Manufacturing Technologymentioning

confidence: 99%

Microalgal Biomass as Feedstock for Bacterial Production of PHA: Advances and Future Prospects

Tan

Nadir

Sudesh

2022

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…Mass transfer coefficients are often, although not routinely, measured by photobioreactor developers [3][4][5][6][7][8][9]. Knowing mass transfer capabilities is essential information for judging the potential of a photobioreactor's geometry to scale its performance when other bottlenecks are removed.…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Features of Wavy-Bottomed Cascade Photobioreactors

Moroni

Sed

Cicci³

et al. 2021

ChemEngineering

View full text Add to dashboard Cite

It has been suggested that the energy-efficient production of microalgae biomass can be more easily obtained in short light path photobioreactors that can be operated at high biomass concentration. On the downside, however, high biomass concentrations also require an efficient gas exchange rate to avoid metabolic growth limitation or inhibition. A cascade photobioreactor featuring a thin liquid layer flowing down a sloping, wavy-bottomed surface can be operated at a biomass concentration that is much higher compared to most usual open-type equipment. Liquid flow, upon investigation, proved to exhibit peculiar “local recirculation” hydrodynamics, potentially conducive to the mixing of superficial and deep zones of the photobioreactor. Mass transfer coefficient represents a useful parameter to optimize the performance of a microalgal photobioreactor and its scale-up. The aim of the present article is to discuss the experimental mass transfer features of this novel type of photobioreactor and highlight expected opportunities and issues entailed by different ways of installing and operating such novel types of photobioreactors.

show abstract

“…15 The periodic store and release of CO 2 in the baffles enhanced the bubble retention time, thereby improving microalgal growth. In addition, Ye et al 16 developed a serial lantern-shaped baffle system in a vertical tubular photobioreactor, resulting in the formation of smaller bubble sizes due to the increased shear force induced by increased radial velocities. However, the presence of a series of lantern-shaped baffles also has a hindering effect on inner flow intensity due to the increase in flow resistance.…”

Section: ■ Introductionmentioning

confidence: 99%

Developing a Spiral-Ascending CO₂ Dissolver to Enhance CO₂ Mass Transfer in a Horizontal Tubular Photobioreactor for Improved Microalgal Growth

Cheng

Xin

et al. 2020

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

In order to enhance the CO 2 dissolution rate and prolong gas− liquid contact time to improve microalgal growth, a spiral-ascending CO 2 dissolver was developed to enhance CO 2 mass transfer in a horizontal tubular photobioreactor. A spiral-ascending flow pattern of CO 2 bubbles was formed with a helical baffle and central hollow tube in the CO 2 dissolver, which markedly extended flow trajectory of CO 2 bubbles and intensified the mixing effect. This novel CO 2 dissolver with the helical baffle shortened the bubble generation time by 30.6% and decreased the bubble generation diameter by 23.4%, thereby enhancing the mass transfer coefficient by 69.2%. The bubble retention time dramatically increased by 190.2%, which prolonged CO 2 gas−liquid contact time to enhance dissolved CO 2 concentration. The liquid phase mixing time decreased by 15.8% to give a uniform status in microalgal suspension, allowing for sufficient nutrient supply for photosynthesis during microalgal circulation in horizontal tubes. This led to an increased microalgal biomass accumulation by 40.8% with 15% CO 2 in the horizontal tubular photobioreactor.

show abstract

Serial lantern-shaped draft tube enhanced flashing light effect for improving CO2 fixation with microalgae in a gas-lift circumflux column photobioreactor

Cited by 42 publications

References 28 publications

Microalgal Biomass as Feedstock for Bacterial Production of PHA: Advances and Future Prospects

Microalgal Biomass as Feedstock for Bacterial Production of PHA: Advances and Future Prospects

Mass Transfer Features of Wavy-Bottomed Cascade Photobioreactors

Developing a Spiral-Ascending CO₂ Dissolver to Enhance CO₂ Mass Transfer in a Horizontal Tubular Photobioreactor for Improved Microalgal Growth

Contact Info

Product

Resources

About

Serial lantern-shaped draft tube enhanced flashing light effect for improving CO2 fixation with microalgae in a gas-lift circumflux column photobioreactor

Cited by 42 publications

References 28 publications

Microalgal Biomass as Feedstock for Bacterial Production of PHA: Advances and Future Prospects

Microalgal Biomass as Feedstock for Bacterial Production of PHA: Advances and Future Prospects

Mass Transfer Features of Wavy-Bottomed Cascade Photobioreactors

Developing a Spiral-Ascending CO2 Dissolver to Enhance CO2 Mass Transfer in a Horizontal Tubular Photobioreactor for Improved Microalgal Growth

Contact Info

Product

Resources

About

Developing a Spiral-Ascending CO₂ Dissolver to Enhance CO₂ Mass Transfer in a Horizontal Tubular Photobioreactor for Improved Microalgal Growth