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  • Walter de Gruyter GmbH  (5)
  • 1
    Online Resource
    Online Resource
    Biochemical engineering in China
    Walter de Gruyter GmbH ; 2019
    In:  Reviews in Chemical Engineering Vol. 35, No. 8 ( 2019-11-26), p. 929-993
    Details
    In: Reviews in Chemical Engineering, Walter de Gruyter GmbH, Vol. 35, No. 8 ( 2019-11-26), p. 929-993
    Abstract: Chinese biochemical engineering is committed to supporting the chemical and food industries, to advance science and technology frontiers, and to meet major demands of Chinese society and national economic development. This paper reviews the development of biochemical engineering, strategic deployment of these technologies by the government, industrial demand, research progress, and breakthroughs in key technologies in China. Furthermore, the outlook for future developments in biochemical engineering in China is also discussed.
    Type of Medium: Online Resource
    ISSN: 2191-0235 , 0167-8299
    URL: Article
    DOI: 10.1515/revce-2017-0035
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2592648-2
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  • 2
    Online Resource
    Online Resource
    Preparation of flexible and binder-free lignin-based carbon nanofiber electrode materials by electrospinning in aqueous system
    Walter de Gruyter GmbH ; 2023
    In:  Nordic Pulp & Paper Research Journal Vol. 0, No. 0 ( 2023-09-29)
    Details
    In: Nordic Pulp & Paper Research Journal, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-09-29)
    Abstract: Lignin, as a widely distributed, renewable and environmentally friendly source of carbon, could been utilized for carbon nanofibers to not only maximize the usage of resources, but also expand the energy-related opportunities. In this research, flexible lignin-based carbon nanofibers are prepared by electrospinning lignin nanofibers in a new green aqueous solution of lignin and polyvinyl alcohol (PVA), which is then characterized by physical and chemical characterizations. The results reveal that optimal carbonization temperature of 800 °C shows great improvements on the structural properties of lignin-based carbon nanofibers, which can be applied as binder-free electric double layer capacitor (EDLC) electrodes with good flexibility. The 2032 type button battery has a superior electrochemical performance with a large specific capacitance of 217.2 F g −1 at a 0.2 A g −1 current density, and remarkable cyclic stability of 94.9 % capacitance retention even after 10,000 charge and discharge cycles, due to the abundance of mesoporous volume and large microporous surface area of lignin-based carbon nanofiber electrodes carbonized in 800 °C.
    Type of Medium: Online Resource
    ISSN: 0283-2631 , 2000-0669
    URL: Article
    DOI: 10.1515/npprj-2023-0026
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2479176-3
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  • 3
    Online Resource
    Online Resource
    Great potentials of lignin-based separator for Li-ion battery with electrospinning in aqueous system
    Walter de Gruyter GmbH ; 2023
    In:  Nordic Pulp & Paper Research Journal Vol. 0, No. 0 ( 2023-09-04)
    Details
    In: Nordic Pulp & Paper Research Journal, Walter de Gruyter GmbH, Vol. 0, No. 0 ( 2023-09-04)
    Abstract: Separator plays a key role in the safety and performances of lithium-ion batteries with the needs of good thermal stability and wettability. Compared with the commercial separator mainly made by polyolefins in organic solvents, the electrospinning of lignin/polyvinyl alcohol in an aqueous solution has been investigated as a green and economically viable method to produce high-performance separators without any other chemical additives. Lignin/polyvinyl alcohol (mass ratio: 3:7) nanofiber separators outperform commercial polypropylene separators in terms of porosity (71 %), liquid absorption (373 %), and outstanding thermal stability at 200 °C. Additionally, Li-ion battery cells that were constructed using different separators were assessed to demonstrate favorable electrochemical performance. The results showed that fabricated Li-ion battery with Lignin/polyvinyl alcohol (mass ratio: 3:7) nanofiber separators possesses a superior capacitance of 154.1 mA h g −1 at 0.5 C, and maintained outstanding cycle stability after 50 times of charging and discharging process at 0.5 C with the capacitance retention rate up to 98.7 %. The facile and sustainable synthesis strategy of lignin-based separator materials for Li-ion batteries developed in this work provides new perspectives for related research, especially based on environmentally friendly aqueous systems.
    Type of Medium: Online Resource
    ISSN: 0283-2631 , 2000-0669
    URL: Article
    DOI: 10.1515/npprj-2023-0028
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2023
    detail.hit.zdb_id: 2479176-3
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  • 4
    Online Resource
    Online Resource
    A comparative study of an anaerobic-oxic (AO) system and a sequencing batch biofilm reactor (SBBR) in coating wastewater treatment and their microbial communities
    Walter de Gruyter GmbH ; 2020
    In:  Nordic Pulp & Paper Research Journal Vol. 35, No. 1 ( 2020-03-26), p. 148-157
    Details
    In: Nordic Pulp & Paper Research Journal, Walter de Gruyter GmbH, Vol. 35, No. 1 ( 2020-03-26), p. 148-157
    Abstract: Coating wastewater from paper mills has been characterized by a high chemical oxygen demand (COD), high total suspended solids (TSS) and a high degree of color. In this paper, a sequencing batch biofilm reactor (SBBR) and an anaerobic-oxic (AO) system that consisted of a hydrolytic acidification reactor and an activated sludge reactor (HAASR) were implemented to treat coagulated coating wastewater from a paper mill. The COD, color and TSS removal efficiencies of the SBBR were 87.7 %, 33.5 %, and 41.4 %, and those of the HAASR were 85.3 %, 22.5 % and 19.4 %, respectively. It is proposed that more recalcitrant compounds were removed by the SBBR than by the HAASR. The microbial communities of the SBBR sludge and the HAASR sludge were evaluated and indicated that the SBBR sludge had lower microbial richness and diversity than the HAASR sludge. Moreover, Proteobacteria and Bacteroidetes were the dominant bacteria in both the HAASR and SBBR sludges.
    Type of Medium: Online Resource
    ISSN: 2000-0669 , 0283-2631
    URL: Article
    DOI: 10.1515/npprj-2019-0024
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2020
    detail.hit.zdb_id: 2479176-3
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  • 5
    Online Resource
    Online Resource
    Application of sequencing batch biofilm reactor (SBBR) to recycled paper mill effluent treatment
    Walter de Gruyter GmbH ; 2021
    In:  Nordic Pulp & Paper Research Journal Vol. 36, No. 4 ( 2021-12-20), p. 707-713
    Details
    In: Nordic Pulp & Paper Research Journal, Walter de Gruyter GmbH, Vol. 36, No. 4 ( 2021-12-20), p. 707-713
    Abstract: Paper mill effluent has been characterized as recalcitrant because of containing lignin and its derivatives. Since biofilm system exhibits a notable potential for the removal of recalcitrant contaminants, a sequencing batch biofilm reactor (SBBR) was employed to treat coagulated recycled paper mill effluent in this study. The results indicated that the SBBR removed 91.3 % of chemical oxygen demand (COD), whilst total suspended solid (TSS) and color removal reached 83.1 % and 71.0 %, respectively. The microbial analysis suggested that three typical heterotrophic phyla, Proteobacteria , Bacteroidetes and Acidobacteria are dominant bacteria and reflected the removal of recalcitrant contaminants. The COD removal rate of SBBR is evidently superior to conventional activated sludge process due to high sludge concentration as well as long sludge retention time (SRT). Whilst the problem of sludge bulking can be successfully avoided, the blockage of reactor caused by TSS accumulation and microbial growth deserve further investigation.
    Type of Medium: Online Resource
    ISSN: 2000-0669 , 0283-2631
    URL: Article
    DOI: 10.1515/npprj-2021-0030
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2021
    detail.hit.zdb_id: 2479176-3
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