Time-Gradient Nitric Acid Modification of CF Biofilm-Carrier and Surface Nature Effects on Microorganism Immobilization Behavior in Wastewater

Bao, Yanling; Dai, Guangze

doi:10.5504/bbeq.2013.0054

Cited by 23 publications

(8 citation statements)

References 29 publications

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“…The content of acidic functional groups correlated with the DM relationship, which improves the surface wettability. In the previous literature, it was suggested that the hydrophilicity of materials increased as the number of oxygen functional groups increased [ 14 , 23 ]. Therefore, nitricacid oxidation was a simple and effective way to improve the hydrophilicity of CF.…”

Section: Resultsmentioning

confidence: 99%

“…Carbon has been widely used in medicine, bioengineering and biomaterials, owing to its good biocompatibility [ 8 , 9 , 10 , 11 ]. The biocompatibility of carbon fiber (CF) was shown to possess a high capacity for bacterial adhesion and has been adopted as a biofilm support for wastewater treatment [ 12 , 13 , 14 , 15 ]. Therefore, carbon-based materials have great potential for application as immobilization carriers for multi-batch fermentation.…”

Section: Introductionmentioning

confidence: 99%

“…were increased by the surface oxidation treatment [ 12 , 24 , 25 , 26 ]. Bao and Dai [ 14 ] also demonstrate that theinorganic acid treatment is an efficient way to enhance the hydrophilicity of the carbon-based materials.…”

Section: Introductionmentioning

confidence: 99%

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Nitric Acid-Treated Carbon Fibers with Enhanced Hydrophilicity for Candida tropicalis Immobilization in Xylitol Fermentation

et al. 2016

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Nitric acid (HNO3)-treated carbon fiber (CF) rich in hydrophilic groups was applied as a cell-immobilized carrier for xylitol fermentation. Using scanning electron microscopy, we characterized the morphology of the HNO3-treated CF. Additionally, we evaluated the immobilized efficiency (IE) of Candida tropicalis and xylitol fermentation yield by investigating the surface properties of nitric acid treated CF, specifically, the acidic group content, zero charge point, degree of moisture and contact angle. We found that adhesion is the major mechanism for cell immobilization and that it is greatly affected by the hydrophilic–hydrophilic surface properties. In our experiments, we found 3 hto be the optimal time for treating CF with nitric acid, resulting in an improved IE of Candida tropicalis of 0.98 g∙g−1 and the highest xylitol yield and volumetric productivity (70.13% and 1.22 g∙L−1∙h−1, respectively). The HNO3-treated CF represents a promising method for preparing biocompatible biocarriers for multi-batch fermentation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitric Acid-Treated Carbon Fibers with Enhanced Hydrophilicity for Candida tropicalis Immobilization in Xylitol Fermentation

et al. 2016

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“…The results indicated that FAC surface might hold the greatest number of O-containing groups among three support materials. The sufficient O-containing groups on surface could possibly lead to a strong surface hydrophilicity (Bao and Dai, 2014). Both FAC surface and CC surface mainly contained O and Si, which indicated that SiO 2 might be the main framework of ceramsite.…”

Section: Surface Property Of Support Materialsmentioning

confidence: 99%

“…Accordingly, compared to CC and AC, the stronger surface hydrophilicity of FAC might be another underlying reason for the better performance of MFAC in methane elimination. Bao and Dai (2014) suggested that the improved surface hydrophilicity of carbon fiber could favor microbial immobilization on its surface, and they used HNO 3 to modify carbon fiber and promote its surface hydrophilicity, and the modified carbon fiber kept a microbial immobilization ratio which was 93.9% higher than that of the unmodified carbon fiber.…”

Section: Methane Elimination and Mob Immobilization Performancesmentioning

confidence: 99%

Methane Elimination Using Biofiltration Packed With Fly Ash Ceramsite as Support Material

Sun

Yu-zhong

Yang

et al. 2020

Front. Bioeng. Biotechnol.

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Methane is a greenhouse gas and significantly contributes to global warming. Methane biofiltration with immobilized methane-oxidizing bacteria (MOB) is an efficient and ecofriendly approach for methane elimination. To achieve high methane elimination capacity (EC), it is necessary to use an exceptional support material to immobilize MOB. The MOB consortium was inoculated in biofilters to continuously eliminate 1% (v/v) of methane. Results showed that the immobilized MOB cells outperformed than the suspended MOB cells. The biofilter packed with fly ash ceramsite (FAC) held the highest average methane EC of 4.628 g h −1 m −3 , which was 33.4% higher than that of the biofilter with the suspended MOB cells. The qPCR revealed that FAC surface presented the highest pmoA gene abundance, which inferred that FAC surface immobilized the most MOB biomass. The XPS and contact angle measurement indicated that the desirable surface elemental composition and stronger surface hydrophilicity of FAC might favor MOB immobilization and accordingly improve methane elimination.

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Carbon fibers with a nano-hydroxyapatite coating as an excellent biofilm support for bioreactors

Liu

Zhang

Bao³

et al. 2018

Applied Surface Science

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Time-Gradient Nitric Acid Modification of CF Biofilm-Carrier and Surface Nature Effects on Microorganism Immobilization Behavior in Wastewater

Cited by 23 publications

References 29 publications

Nitric Acid-Treated Carbon Fibers with Enhanced Hydrophilicity for Candida tropicalis Immobilization in Xylitol Fermentation

Nitric Acid-Treated Carbon Fibers with Enhanced Hydrophilicity for Candida tropicalis Immobilization in Xylitol Fermentation

Methane Elimination Using Biofiltration Packed With Fly Ash Ceramsite as Support Material

Carbon fibers with a nano-hydroxyapatite coating as an excellent biofilm support for bioreactors

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