Optimum interaction of light intensity and CO2 concentration in bioremediating N-rich real wastewater via assimilation into attached microalgal biomass as the feedstock for biodiesel production

Rosli, Siti Suhailah; Wong, Chung Yiin; Yunus, Normawati M.; Lam, Man Kee; Show, Pau Loke; Cheng, Chin Kui; Wang, David; Oh, Wen Da; Lim, Jun Wei

doi:10.1016/j.psep.2020.05.045

Cited by 63 publications

(12 citation statements)

References 30 publications

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“…Various approaches are applied to enhance the nutritional value and improve its utilization in dairy cow's nutrition 2 . The biological approaches are the most common with more harmless-treated RS 3 , 4 . For several years, yeast has become an innovative biological model organism for enhancing animal efficiency and is the traditional practice for ruminant feed additives 5 .…”

Section: Introductionmentioning

confidence: 99%

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Suntara

Cherdthong

Uriyapongson

et al. 2021

Sci Rep

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Upgrading the nutritive value of rice straw (RS) is necessary to increase its contribution to enhancing meat and milk production. Present work verified whether novel Crabtree negative yeast inoculant could promote RS utilization, rumen fermentation, and milk quality in tropical crossbred lactating Holstein cows. The new stain of Crabtree negative yeasts (Pichia kudriavzevii KKU20 and Candida tropicalis KKU20) was isolated from the rumen of dairy cattle. This study used 6 multiparous crossbreds between Holstein Frisian × Zebu dairy cows in their mid-lactation period. Dairy cows were randomly allocated to three ensiled RS with various yeast stains including Saccharomyces cerevisiae, P. kudriavzevii KKU20, and C. tropicalis KKU20 according to a 3 × 3 replicated Latin square design. Crabtree-negative yeast (P. kudriavzevii and C. tropicalis) increased the apparent digestibility of dry matter by about 6.9% when compared with Crabtree-positive yeast (S. cerevisiae). Bacterial populations were highest with ensiled RS by C. tropicalis KKU20. Ensiled RS with Crabtree-negative yeasts were significantly increased with total volatile fatty acids, but they did not affect volatile fatty acid profiles. Milk protein precentage was highest at 35.6 g/kg when C. tropicalis was fed, and lowest when applied with S. cerevisiae and P. kudriavzevii KKU20 in ensiled RS at 34.5 and 34.1 g/kg, respectively. Thus, feeding ensiled RS with novel Crabtree negative yeast could improve RS digestion, rumen fermentation, and milk protein content in dairy cows.

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Section: Introductionmentioning

confidence: 99%

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Suntara

Cherdthong

Uriyapongson

et al. 2021

Sci Rep

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“…Among the proposed bioreactors for this type of cultivation, fixed beds are the most promising. If designed appropriately, they would increase efficiency and productivity, by optimizing the CO2 mass transfer, and the nutrients and light uptakes [115,116]. Crucial parameters such as the film and medium thickness, and the support design and disposition would avoid photo-limitation, photoinhibition and pressure built-ups.…”

Section: Production Techniquesmentioning

confidence: 99%

Drop-in biofuels production from microalgae to hydrocarbons: Microalgal cultivation and harvesting, conversion pathways, economics and prospects for aviation

Martinez-Villarreal

Breitenstein

Nimmegeers

et al. 2022

Biomass and Bioenergy

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“…Y. Li et al [115] investigated an air-water system, and showed that the flooding point in RZBs and RPBs was that at which the pressure drop increased quickly when the superficial liquid velocity increased. They proposed a modified Sherwood correlation (17) for RZBs, without considering a t and ε, as follows:…”

Section: Flooding and Pressure Dropmentioning

confidence: 99%

“…Process intensification involves the application of PI techniques or devices and optimization parameters. This category contains many techniques that can be considered to enhance transport in numerous processes, such as bioremediation [17], water deaeration [18], and absorption. As regards devices, many popular contactors are available, such as rotating discs, membranes, and RPBs.…”

Section: Introductionmentioning

confidence: 99%

A Review of Modeling Rotating Packed Beds and Improving Their Parameters: Gas–Liquid Contact

2021

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The aim of this review is to investigate a kind of process intensification equipment called a rotating packed bed (RPB), which improves transport via centrifugal force in the gas—liquid field, especially by absorption. Different types of RPB, and their advantages and effects on hydrodynamics, mass transfer, and power consumption under available models, are analyzed. Moreover, different approaches to the modeling of RPB are discussed, their mass transfer characteristics and hydrodynamic features are compared, and all models are reviewed. A dimensional analysis showed that suitable dimensionless numbers could make for a more realistic definition of the system, and could be used for prototype scale-up and benchmarking purposes. Additionally, comparisons of the results demonstrated that Re, Gr, Sc, Fr, We, and shape factors are effective. In addition, a study of mass transfer models revealed that the contact zone was the main area of interest in previous studies, and this zone was not evaluated in the same way as packed beds. Moreover, CFD studies revealed that the realizable k-ε turbulence model and the VOF two-phase model, combined with experimental reaction or mass transfer equations for analyzing hydrodynamic and mass transfer coefficients, could help define an RPB system in a more realistic way.

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Optimum interaction of light intensity and CO2 concentration in bioremediating N-rich real wastewater via assimilation into attached microalgal biomass as the feedstock for biodiesel production

Cited by 63 publications

References 30 publications

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Novel Crabtree negative yeast from rumen fluids can improve rumen fermentation and milk quality

Drop-in biofuels production from microalgae to hydrocarbons: Microalgal cultivation and harvesting, conversion pathways, economics and prospects for aviation

A Review of Modeling Rotating Packed Beds and Improving Their Parameters: Gas–Liquid Contact

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