The acclimation of Chlorella to high-level nitrite for potential application in biological NOx removal from industrial flue gases

Li, Tianpei; Xu, Gang; Rong, Junfeng; Chen, Hui; He, Chenliu; Giordano, Mario; Wang, Qiang

doi:10.1016/j.jplph.2016.03.006

Cited by 34 publications

(18 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(C2), and C. sorokiniana (C3), that have significant differences in lipid productivity and a high level of nucleotide sequence identity in their 18S rRNA gene sequences [38]. In addition, we found that although the growth of all three strains reached the lag phase at 12 days, significant differences (one-way ANOVA test, p < 0.05) in growth rates were evident (C3: 0.764 ± 0.044 > C1: 0.634 ± 0.032 > C2: 0.572 ± 0.023), which showed the similar trend with N consumption (C3 > C1 > C2) but contrary to lipid contents (C3 < C1 < C2) (Additional file 4: Figure S2A, B, C and Figure S3).…”

Section: Resultsmentioning

confidence: 99%

Comparative metabolic profiling of the lipid-producing green microalga Chlorella reveals that nitrogen and carbon metabolic pathways contribute to lipid metabolism

Chen

Zheng

Zhan

et al. 2017

Biotechnol Biofuels

Self Cite

105

View full text Add to dashboard Cite

Microalgae are a promising feedstock for biofuel production. Microalgal metabolic pathways are heavily influenced by environmental factors. For instance, lipid metabolism can be induced by nitrogen-limiting conditions. However, the underlying mechanisms of lipid biosynthesis are unclear. In this study, we analyzed the global metabolic profiles of three genetically closely related Chlorella strains (C1, C2, and C3) with significant differences in lipid productivity to identify the contributions of key metabolic pathways to lipid metabolism. We found that nitrogen obtained from amino acid catabolism was assimilated via the glutamate–glutamine pathway and then stored as amino acids and intermediate molecules (particularly proline, alanine, arginine, succinate, and gamma-aminobutyrate) via the corresponding metabolic pathways, which led to carbon–nitrogen disequilibrium. Excess carbon obtained from photosynthesis or glycolysis was re-distributed into carbon-containing compounds, such as glucose-6-phosphate, fructose-6-phosphate, phosphoenolpyruvate, lactate, citrate, 3-hydroxybutyrate, and leucine, and then diverted into lipid metabolism for the production of storage lipids via the gamma-aminobutyrate pathway, glycolysis, and the tricarboxylic acid cycle. These results were substantiated in the model green alga Chlamydomonas reinhardtii by analyzing various mutants deficient in glutamate synthase/NADH-dependent, glutamate synthase/Fd-dependent, glutamine synthetase, aspartate aminotransferase, alanine aminotransferase, pyruvate kinase, and citrate synthase. Our study suggests that not only carbon but also nitrogen assimilation and distribution pathways contribute to lipid biosynthesis. Furthermore, these findings may facilitate genetic engineering efforts to enhance microalgal biofuel production.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-017-0839-4) contains supplementary material, which is available to authorized users.

show abstract

Section: Resultsmentioning

confidence: 99%

Comparative metabolic profiling of the lipid-producing green microalga Chlorella reveals that nitrogen and carbon metabolic pathways contribute to lipid metabolism

Chen

Zheng

Zhan

et al. 2017

Biotechnol Biofuels

Self Cite

105

View full text Add to dashboard Cite

show abstract

“…The formation of NOx in a diesel engine is due to the presence of a mixture of air and fuel at high pressure which produces NO, which will react further with oxygen to form NO2. The mixture of NO and NO2 is called NOx (Li et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…NOx reduction through SCR is the most mature and efficient technology for reducing NOx; it uses vanadium supported on titanium with WO3 or MoO3 as catalyst promoters (Dvořák et al, 2010. The NSR process is an alternative technology for NOx reduction, in which a storage material is utilized to chemisorb NOx, and a reducing agent is regularly fed, which will reduce the chemisorbed species to N2 (Li et al, 2016). The catalysts for NSR are basically composed of an alkali or alkali-earth oxide and a noble metal impregnated on alumina (Epling et al, 2004;Pereda-Ayo et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

NOx Removal from Air through Super Hydrophobic Hollow Fiber Membrane Contactors

Kartohardjono¹,

Saksono²,

Supramono³

et al. 2019

IJTech

View full text Add to dashboard Cite

NOx, a generic term for nitrogen oxides, is an air pollutant that can causes damage to the ozone layer, and produces greenhouse effects, acid rain and photochemical smog. It is mainly produced by diesel engine exhaust due to the reaction between nitrogen and oxygen, especially at elevated temperatures. NOx needs to be reduced from flue gas in order to fulfil environment regulations due to its hazardous nature. This study aims to remove NOx from air through absorption using a mixture of H2O2 and HNO3 solutions as an absorbent in the membrane contactors. In the experiment, the feed gas and the absorbent were flowed in the shell side and the lumen fibers, respectively. The flow rates of absorbent and feed gas, as well as the fiber number the membrane contactor, greatly influence the efficiency of NOx removal, mass transfer coefficients and fluxes. The highest values of NOx removal efficiency, mass transfer coefficient and flux achieved in the study were 47%, 8.7×10-5 cm.sec-1 , and 3.1×10-5 mmole.cm-2 .sec-1 , respectively.

show abstract

“…Ozone removal or it conversion to O•, which can be enhanced by using anatase TiO 2 [33], palladium loading on the activated carbon fiber (Pd/ACFs) [34], palladium or cerium modification for manganese dioxide (MnO 2 ) catalysts [35], and nanostructured proton-containing δ-MnO 2 catalyst [36]. Further, NO x removal can be enhanced by the method including biological removal [37], nanostructured catalysts and chemical reaction (i.e., 2NO 2 + 2NaOH = NaNO 2 + NaNO 3 + H 2 O, or NO 2 -+ NO + 2NaOH = 2NaNO 2 + H 2 O) [38]. The yield characteristics of oxides (O 3 and NO x ) would be regulated by the gas flow velocity, and the applied electrical parameters of DBD reactor.…”

Section: Introductionmentioning

confidence: 99%

Regulation characteristics of oxide generation and formaldehyde removal by using volume DBD reactor

Chen

Gao

2017

Plasma Sci. Technol.

View full text Add to dashboard Cite

Discharge plasmas in air can be accompanied by ultraviolet (UV) radiation and electron impact, which can produce large numbers of reactive species such as hydroxyl radical (OH•), oxygen radical (O•), ozone (O 3), and nitrogen oxides (NO x), etc. The composition and dosage of reactive species usually play an important role in the case of volatile organic compounds (VOCs) treatment with the discharge plasmas. In this paper, we propose a volume discharge setup used to purify formaldehyde in air, which is configured by a plate-to-plate dielectric barrier discharge (DBD) channel and excited by an AC high voltage source. The results show that the relative spectral-intensity from DBD cell without formaldehyde is stronger than the case with formaldehyde. The energy efficiency ratios (EERs) of both oxides yield and formaldehyde removal can be regulated by the gas flow velocity in DBD channel, and the most desirable processing effect is the gas flow velocity within the range from 2.50 to 3.33 m s −1. Moreover, the EERs of both the generated dosages of oxides (O 3 and NO 2) and the amount of removed formaldehyde can also be regulated by both of the applied voltage and power density loaded on the DBD cell. Additionally, the EERs of both oxides generation and formaldehyde removal present as a function of normal distribution with increasing the applied power density, and the peak of the function is appeared in the range from 273.5 to 400.0 W l −1. This work clearly demonstrates the regulation characteristic of both the formaldehyde removal and oxides yield by using volume DBD, and it is helpful in the applications of VOCs removal by using discharge plasma.

show abstract

The acclimation of Chlorella to high-level nitrite for potential application in biological NOx removal from industrial flue gases

Cited by 34 publications

References 34 publications

Comparative metabolic profiling of the lipid-producing green microalga Chlorella reveals that nitrogen and carbon metabolic pathways contribute to lipid metabolism

Comparative metabolic profiling of the lipid-producing green microalga Chlorella reveals that nitrogen and carbon metabolic pathways contribute to lipid metabolism

NOx Removal from Air through Super Hydrophobic Hollow Fiber Membrane Contactors

Regulation characteristics of oxide generation and formaldehyde removal by using volume DBD reactor

Contact Info

Product

Resources

About