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Mou Y, Liu N, Su K, Li X, Lu T, Yu Z, Song M. The growth and lipid accumulation of Scenedesmus quadricauda under nitrogen starvation stress during xylose mixotrophic/heterotrophic cultivation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:98934-98946. [PMID: 36502485 DOI: 10.1007/s11356-022-24579-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
In order to conquer the block of high cost and low yields which limit to realize the commercialization of microalgal biodiesel, the mixotrophic and heterotrophic cultivation of Scenedesmus quadricauda FACHB-1297 fed on xylose was separately studied employing six forms of media: phosphorus sufficient, phosphorus restricted, and phosphorus starvation were combined with nitrogen sufficient and nitrogen starvation conditions. The maximum lipid content (about 41% of dry weight) was obtained on the 5th day (heterotrophic cultivation) and 8th day (mixotrophic cultivation) under the nitrogen starved and phosphorus sufficient (N0&P) conditions, which was about twofold in comparison to the final lipid content on the sufficient nitrogen condition (control). Under mixotrophic and heterotrophic modes, the highest lipid production was achieved in the N0&P trial, with the value of 274.96 mg/L and 193.77 mg/L, respectively. Xylose utilization rate of 30-96% under heterotrophic modes was apparently higher than that of 20-50% in mixotrophic modes. In contrast, phosphorus uptake rate of 100% under mixotrophic cultivation was significantly more than that of 60-90% in heterotrophic cultivation. Furthermore, under the condition of heterotrophic cultivation using xylose as a carbon source, the phosphorus had a positive impact on microalgae cell synthesis and the lipid content enhanced with the augmentation in phosphorus concentrations. We suggested that sufficient phosphorus should be supplied for obtaining higher microalgal lipid production in the lack of nitrogen under xylose heterotrophic/mixotrophic condition. This was a highly effective way to obtain efficient microalgae lipid production.
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Affiliation(s)
- Yiwen Mou
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, Shandong, China
| | - Na Liu
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, Shandong, China
| | - Kunyang Su
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, Shandong, China
| | - Xue Li
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, Shandong, China
| | - Tianxiang Lu
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, Shandong, China
| | - Ze Yu
- School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
| | - Mingming Song
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, Shandong, China.
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Nigam H, Jain R, Malik A, Singh V. Comparative Life-Cycle assessment of microalgal biomass production in conventional growth media versus newly developed nanoemulsion media. BIORESOURCE TECHNOLOGY 2022; 352:127069. [PMID: 35367603 DOI: 10.1016/j.biortech.2022.127069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/20/2022] [Accepted: 03/23/2022] [Indexed: 06/14/2023]
Abstract
Microalgae biomass is a potential feedstock for biodiesel, animal feed, biofertilizer, and other products such as bioactive compounds. Most of the reported studies describe microalgae as a green process, however, the impacts associated with its growth media and cultivation have seldom been studied. With an aim to analyze the environmental impacts, the present study compares the life-cycle assessment of microalgal cultivation in two growth media. The data used was obtained from the experimental sets where microalgaeC. pyrenoidosawas cultivated in BG11 (control or SC-1) and silicone oil nanoemulsion (previously developed medium or SC-2) on a lab scale. The environmental impacts were evaluated using the ReCiPe midpoint and endpoint method using Sima Pro 9.0 software based on a "cradle-to-gate" approach. The total environmental score for 1 kg microalgal biomass production was 99.25Pt in SC-1, and 53.39Ptin SC-2, concluding greater environmental burden by SC-1. The photobioreactor construction material along with the operation led to maximum emissions, human toxicity, and resource depletion. In summary, the newly developed nanoemulsion medium was found to be eco-friendly that has the potential to minimize the usage of conventional nutrients and resources.
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Affiliation(s)
- Harshita Nigam
- Applied Microbiology Laboratory, Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas New Delhi 110016, India.
| | - Rahul Jain
- Applied Microbiology Laboratory, Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas New Delhi 110016, India.
| | - Anushree Malik
- Applied Microbiology Laboratory, Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas New Delhi 110016, India.
| | - Vikram Singh
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas New Delhi 110016, India.
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Zhang S, Chen J, Jia Q, Jiang Q, Yan J, Yang G. A Novel and Effective Recyclable BiOCl/BiOBr Photocatalysis for Lignin Removal from Pre-Hydrolysis Liquor. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2836. [PMID: 34835600 PMCID: PMC8618783 DOI: 10.3390/nano11112836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/18/2021] [Accepted: 10/20/2021] [Indexed: 11/17/2022]
Abstract
The presence of lignin hampers the utilization of hemicelluloses in the pre-hydrolysis liquor (PHL) from the kraft-based dissolving pulp production process. In this paper, a novel process for removing lignin from PHL was proposed by effectively recycling catalysts of BiOCl/BiOBr. During the whole process, BiOCl and BiOBr were not only adsorbents for removing lignin, but also photocatalysts for degrading lignin. The results showed that BiOCl and BiOBr treatments caused 36.3% and 33.9% lignin removal, respectively, at the optimized conditions, and the losses of hemicellulose-derived saccharides (HDS) were both 0.1%. The catalysts could be regenerated by simple photocatalytic treatment and obtain considerable CO and CO2. After 15 h of illumination, 49.9 μmol CO and 553.0 μmol CO2 were produced by BiOCl, and 38.7 μmol CO and 484.3 μmol CO2 were produced by BiOBr. Therefore, both BiOCl and BiOBr exhibit excellent adsorption and photocatalytic properties for lignin removal from pre-hydrolysis.
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Affiliation(s)
| | - Jiachuan Chen
- State Key Laboratory of Bio-Based Material and Green Papermaking/Key Laboratory of Pulp & Paper Science and Technology of Education Ministry of China, Qilu University of Technology, Jinan 250353, China; (S.Z.); (Q.J.); (J.Y.)
| | | | - Qimeng Jiang
- State Key Laboratory of Bio-Based Material and Green Papermaking/Key Laboratory of Pulp & Paper Science and Technology of Education Ministry of China, Qilu University of Technology, Jinan 250353, China; (S.Z.); (Q.J.); (J.Y.)
| | | | - Guihua Yang
- State Key Laboratory of Bio-Based Material and Green Papermaking/Key Laboratory of Pulp & Paper Science and Technology of Education Ministry of China, Qilu University of Technology, Jinan 250353, China; (S.Z.); (Q.J.); (J.Y.)
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Wang F, Liu Q, Chen J, Li Z, Fu Y, Qin M. Enhancement of lignin removal from pre-hydrolysis liquor for saccharide recovery via horseradish peroxidase treatment in the presence of Ca 2. Int J Biol Macromol 2020; 163:1989-1994. [PMID: 32946940 DOI: 10.1016/j.ijbiomac.2020.09.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/07/2020] [Accepted: 09/13/2020] [Indexed: 10/23/2022]
Abstract
The removal of lignin is important to the recovery of saccharides from the pre-hydrolysis liquor (PHL) in kraft-based dissolved pulp production. A one-step process for lignin removal from PHL via treatment with horseradish peroxidase (HRP) in the presence of Ca2+ was proposed, and its principle was studied. The results demonstrated synergy between HRP and Ca2+ in lignin removal from PHL, whereas NH4+ had little effect on lignin removal. HRP treatment in the presence of 60 mmol/L of Ca2+ resulted in a lignin removal of 64.8% accompanied by a saccharide loss of 14.2%. HRP catalyzed both the polymerization and depolymerization of the lignin in the PHL. The HRP-catalyzed lignin polymerization rendered some lignin insoluble enabling it to be directly removed. The HRP-catalyzed depolymerization of lignin decreased its molecular weight with an evident increase in its carboxyl content. The insoluble complexes formed between the lignin with carboxyl and the Ca2+ facilitated the removal of the depolymerized lignin.
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Affiliation(s)
- Fusheng Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
| | - Qin Liu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
| | - Jiansong Chen
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
| | - Zongquan Li
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China.
| | - Yingjuan Fu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology (Shandong Academy of Science), Jinan 250353, China
| | - Menghua Qin
- Organic Chemistry Laboratory, Taishan University, Taian 271021, China
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Virtanen T, Lahti J, Kalliola A, Tamminen T, Mänttäri M, Kallioinen M. Influence of laccase treatment on fouling layer formation in ultrafiltration of birch hot-water extract. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Development of sequential and simultaneous bacterial cultures to hydrolyse and detoxify wood pre-hydrolysate for enhanced acetone-butanol-ethanol (ABE) production. Enzyme Microb Technol 2019; 133:109438. [PMID: 31874697 DOI: 10.1016/j.enzmictec.2019.109438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 09/12/2019] [Accepted: 10/01/2019] [Indexed: 12/27/2022]
Abstract
The use of microorganisms is a promising option for an eco-efficient and successful conversion of hardwood hemicelluloses to biofuels. The focus of this work is the treatment of hemicellulosic pre-hydrolysate by flocculation, followed by simultaneous or separate detoxification with Ureibacillus thermosphaericus and Cupriavidus taiwanensis co-culture, and hydrolysis with Paenibacillus campinasensis. A reduction of phenolic compounds was achieved mainly after flocculation, applied as a first detoxification step, but no increase in sugars concentration was observed. The ABE fermentation of the hydrolysate obtained from the simultaneous hydrolysis and detoxification produced 6.8 g L-1 of butanol after 116 h, which was higher than that generated with xylose synthetic medium. The higher biofuel concentration in the hydrolysate is attributed to the existence of carbon sources, other than xylose.
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Combined Treatments Consisting of Calcium Hydroxide and Activate Carbon for Purification of Xylo-Oligosaccharides of Pre-Hydrolysis Liquor. Polymers (Basel) 2019; 11:polym11101558. [PMID: 31557834 PMCID: PMC6835391 DOI: 10.3390/polym11101558] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 09/22/2019] [Accepted: 09/23/2019] [Indexed: 11/17/2022] Open
Abstract
In this study, the effect of a combined treatment consisting of calcium hydroxide (CH) followed by activated carbon (AC) on the purification of hemicellulose in the pre-hydrolysis liquor (PHL) from pulping process has been evaluated. The results show that lignin and furfural of PHL are efficiently removed, and the lignin removal is achieved by forming complexes onto CH particles in the CH treatment process, while acetic acid (acetate) is formed from the hydrolysis of acetyl groups present in the dissolved hemicelluloses in the PHL. The loss of xylo-oligosaccharides (XOS) is moderate, even at a high CH dosage of 0.8% while the xylose concentration is essentially unchanged. For the AC treatment, the optimal treating pH can enhance the interactions between AC and residual lignin and change the zeta potential of AC resulting in improved lignin adsorption onto AC. An increase of AC dosage has the tendency to adsorb more XOSDP>6 than XOSDP2~6. Overall, 66.9% of lignin and 70.1% of furfural removals are achieved under the optimal conditions of CH and AC treatment process, with a 5.9% total xylosugars loss. The present combination of CH and AC treatment process was more effective and selective for purification of xylosugars of PHL.
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Yang S, Yang B, Duan C, Fuller DA, Wang X, Chowdhury SP, Stavik J, Zhang H, Ni Y. Applications of enzymatic technologies to the production of high-quality dissolving pulp: A review. BIORESOURCE TECHNOLOGY 2019; 281:440-448. [PMID: 30876797 DOI: 10.1016/j.biortech.2019.02.132] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 02/01/2019] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Recently, the worldwide production of dissolving pulp has grown rapidly. Enzymatic technologies play an important role in producing high-quality dissolving pulp, due to their green, mild conditions, high specificity and efficiency. In this review, the relevant publications regarding enzyme applications for dissolving pulp are summarized. Cellulase and xylanase are two major enzymes used for this purpose. Cellulase can improve the quality of dissolving pulp, such as improving the reactivity/accessibility, controlling the intrinsic viscosity and adjusting the molecular weight. Xylanase is mainly used to increase the purity of the dissolving pulp and improve the pulp brightness. Furthermore, in order to increase the enzymatic treatment efficiency, the enzymatic technology can be combined with other techniques, including mechanical refining, fiber fractionations, alkali treatment and use of additives. The advantages, disadvantages and practical implications are analyzed. Also, the potential of other enzymes (such as laccase, mannanase) are discussed.
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Affiliation(s)
- Shuo Yang
- Tianjin Key Laboratory of Pulp and Paper, College of Paper Making Science and Technology, Tianjin University of Science and Technology, Tianjin 300457, China; Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Bo Yang
- Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Chao Duan
- College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Darcy Alexandra Fuller
- Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Xinqi Wang
- Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada; College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an 710021, China
| | - Susmita Paul Chowdhury
- Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada
| | - Jaroslav Stavik
- Schweighofer Fiber GmbH, Salzachtalstraße 88, Postfach 62, 5400 Hallein, Austria
| | - Hongjie Zhang
- Tianjin Key Laboratory of Pulp and Paper, College of Paper Making Science and Technology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Yonghao Ni
- Tianjin Key Laboratory of Pulp and Paper, College of Paper Making Science and Technology, Tianjin University of Science and Technology, Tianjin 300457, China; Limerick Pulp & Paper Centre & Department of Chemical Engineering, University of New Brunswick, Fredericton, NB E3B 5A3, Canada.
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Li Z, Qiu C, Gao J, Wang H, yingjuan F, Qin M. Improving lignin removal from pre-hydrolysis liquor by horseradish peroxidase-catalyzed polymerization. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.11.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Chen X, Cao X, Sun S, Yuan T, Wang S, Shi Q, Sun R. Hydrothermal acid hydrolysis for highly efficient separation of lignin and xylose from pre-hydrolysis liquor of kraft pulping process. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.09.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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11
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Chen J, Dong J, Yang G, He M, Xu F, Fatehi P. A process for purifying xylosugars of pre-hydrolysis liquor from kraft-based dissolving pulp production process. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:337. [PMID: 30598699 PMCID: PMC6302441 DOI: 10.1186/s13068-018-1336-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 12/10/2018] [Indexed: 05/31/2023]
Abstract
BACKGROUND In the kraft-based dissolving pulp production process, pre-hydrolysis liquor (PHL) is produced, which contains hemicelluloses, lignin, furfural and acetic acid. PHL is currently burned in the recovery boiler of the kraft pulping process, but it can be utilized for the generation of high-valued products, such as xylitol and xylanase, via fermentation processes. However, some PHL constituents, e.g., furfural and lignin, are contaminants for fermentation processes and they must be eliminated for production of value-added products. RESULTS In this work, a process is introduced for removing contaminants of PHL. Ca(OH)2 treatment is the first step of this process, which removed 41.2% of lignin and negligible amount of sugars. In this step, a notable increase in the concentration of acetic acid was achieved (ranging from 6.2 to 11.7 g/L). In the second step, the implementation of adsorption using activated carbon (AC) at 1 wt% dosage led to additional 32% lignin and 5.9% xylosugar removals. In addition, laccase assisted activated carbon treatment led to further removal of lignin via accelerating lignin polymerization and adsorption on AC (i.e., removal from PHL). Overall, 90.7% of lignin, 100% of furfural, 5.7% of xylose, and 12% of xylan were removed from PHL, while the concentration of acetic acid became twofolds in the PHL. CONCLUSIONS This study reports an attractive process for purifying sugars and acetic acid of PHL. This process may be implemented for producing sugar-based value-added products from PHL. It also discusses the mechanism of Ca(OH)2 treatment, AC adsorption and laccase assisted activated carbon treatment for lignin removal.
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Affiliation(s)
- Jiachuan Chen
- State Key Laboratory of Bio-based Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong China
| | - Jiran Dong
- State Key Laboratory of Bio-based Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong China
| | - Guihua Yang
- State Key Laboratory of Bio-based Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong China
| | - Ming He
- State Key Laboratory of Bio-based Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong China
| | - Feng Xu
- State Key Laboratory of Bio-based Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong China
| | - Pedram Fatehi
- State Key Laboratory of Bio-based Materials and Green Papermaking, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 Shandong China
- Green Processes Research Centre and Department of Chemical Engineering, Lakehead University, Thunder Bay, ON P7B 5E1 Canada
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Marx S, Radebe LJ. Microwave-assisted recovery of monomeric sugars from an acidic steam treated wood hydrolysate. Heliyon 2018; 4:e00911. [PMID: 30426106 PMCID: PMC6222090 DOI: 10.1016/j.heliyon.2018.e00911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 09/21/2018] [Accepted: 10/29/2018] [Indexed: 11/30/2022] Open
Abstract
Fractionation of components from bio-refinery wastes streams is complicated by the presence of both oligomer and lignin fractions. Microwave-assisted acid hydrolysis was used in this study to convert oligomer sugars in an industrial prehydrolysis liquor (PHL) to monomeric sugars. A total of 19.6 g/L monomeric sugars was obtained at a combined severity factor (CSF) of 3.2. Furthermore, it was found that xylan linked to lignin in a lignin-carbohydrate complex (LCC) could be liberated, resulting in lignin with a relatively low dispersity (3.12) and average molecular weight (1718 g/mol) that has high commercial value in the phenol–formaldehyde resin industry. This study presents for the first time a relatively inexpensive method for recovery of 100% of available sugars in the PHL without apparent loss in monomeric sugar as well as 50% removal of lignin as a valuable by-product. Application of this method can significantly improve the economic sustainability of forest-based biorefineries.
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Song M, Pei H. The growth and lipid accumulation of Scenedesmus quadricauda during batch mixotrophic/heterotrophic cultivation using xylose as a carbon source. BIORESOURCE TECHNOLOGY 2018; 263:525-531. [PMID: 29778023 DOI: 10.1016/j.biortech.2018.05.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/03/2018] [Accepted: 05/05/2018] [Indexed: 06/08/2023]
Abstract
To overcome the bottlenecks of high cost and low production yields that restrict the commercial production of microalgae biodiesel, the use of xylose was evaluate by Scenedesmus quadricauda FACHB-1297, which was shown to be capable of mixotrophic and heterotrophic growth and lipid production on xylose, rich in the waste streams from pulp and paper industry, with increases in lipid productivities of 35.8-fold (mixotrophic) and 9.2-fold (heterotrophic) in comparison to photoautotrophic lipid yields. Five doses of xylose were tested to determine the effects and mechanisms of the carbon source on microalgae in mixotrophic mode. At the optimal xylose dosage of 4 g/L, the highest lipid content (38.61%) and productivity (139.55 mg/L/d) were achieved besides maximum biomass productivity (361.4 mg/L/d), nutrient removal efficiency of 68.4% (nitrogen), 97.2% (phosphorus) and 35.2% (xylose). Those indicated that S. quadricauda FACHB-1297 was suitable for further development of using xylose from certain waste streams for biofuel production.
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Affiliation(s)
- Mingming Song
- School of Environmental Science & Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250353, PR China; Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China
| | - Haiyan Pei
- Shandong Provincial Engineering Centre on Environmental Science and Technology, 17923 Jingshi Road, Jinan 250061, PR China.
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Jiang J, Li Z, Fu Y, Wang Z, Qin M. Enhancement of colloidal particle and lignin removal from pre-hydrolysis liquor of aspen by a combination of pectinase and cationic polymer treatment. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.01.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Kong X, Xu H, Wu H, Wang C, He A, Ma J, Ren X, Jia H, Wei C, Jiang M, Ouyang P. Biobutanol production from sugarcane bagasse hydrolysate generated with the assistance of gamma-valerolactone. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.06.013] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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High Laccase Expression by Trametes versicolor in a Simulated Textile Effluent with Different Carbon Sources and PHs. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2016; 13:ijerph13080778. [PMID: 27490563 PMCID: PMC4997464 DOI: 10.3390/ijerph13080778] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 07/26/2016] [Accepted: 07/28/2016] [Indexed: 12/03/2022]
Abstract
Textile effluents are highly polluting and have variable and complex compositions. They can be extremely complex, with high salt concentrations and alkaline pHs. A fixed-bed bioreactor was used in the present study to simulate a textile effluent treatment, where the white-rot fungus, Trametes versicolor, efficiently decolourised the azo dye Reactive Black 5 over 28 days. This occurred under high alkaline conditions, which is unusual, but advantageous, for successful decolourisation processes. Active dye decolourisation was maintained by operation in continuous culture. Colour was eliminated during the course of operation and maximum laccase (Lcc) activity (80.2 U∙L−1) was detected after glycerol addition to the bioreactor. Lcc2 gene expression was evaluated with different carbon sources and pH values based on reverse transcriptase-PCR (polymerase chain reaction). Glycerol was shown to promote the highest lcc2 expression at pH 5.5, followed by sucrose and then glucose. The highest levels of expression occurred between three and four days, which corroborate the maximum Lcc activity observed for sucrose and glycerol on the bioreactor. These results give new insights into the use of T. versicolor in textile dye wastewater treatment with high pHs.
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Engel N, Hundt M, Schapals T. Increasing the lignin yield of the Alkaline Polyol Pulping process by treating black liquor with laccases of Myceliophthora thermophila. BIORESOURCE TECHNOLOGY 2016; 203:96-102. [PMID: 26722808 DOI: 10.1016/j.biortech.2015.12.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 12/07/2015] [Accepted: 12/12/2015] [Indexed: 06/05/2023]
Abstract
The Alkaline Polyol Pulping process separates cellulose from lignocellulosic biomass by dissolving lignin to a great extent. Due to the pulping conditions the dissolved lignin depolymerises and only 75% can be precipitated. To increase this amount, a 24 h reaction of laccases of Myceliophthora thermophila with lignin dissolved in black liquor of the AlkaPolP process was investigated. The influence of pH, temperature, enzyme concentration and partial oxygen pressure was examined in a batch stirred tank reactor using a Box-Behnken factorial design. Due to the enzymatic reaction the lignin polymerises which results in an enhanced lignin precipitation. The addition of a mediator improves the polymerisation but decreases the amount of precipitable lignin. The influence of the parameters on precipitation yield and molecular mass can sufficiently be described with a second-order model and optimum conditions can be assessed. FT-IR spectra of the obtained lignins revealed that its typical phenolic structure is preserved.
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Affiliation(s)
- Norman Engel
- Brandenburg University of Technology, Department of Chemical Reaction Engineering, Burger Chaussee 2, 03044 Cottbus, Germany.
| | - Martin Hundt
- Brandenburg University of Technology, Department of Chemical Reaction Engineering, Burger Chaussee 2, 03044 Cottbus, Germany
| | - Tino Schapals
- Brandenburg University of Technology, Department of Chemical Reaction Engineering, Burger Chaussee 2, 03044 Cottbus, Germany
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Tan L, Wang M, Li X, Li H, Zhao J, Qu Y, Choo YM, Loh SK. Fractionation of oil palm empty fruit bunch by bisulfite pretreatment for the production of bioethanol and high value products. BIORESOURCE TECHNOLOGY 2016; 200:572-578. [PMID: 26539970 DOI: 10.1016/j.biortech.2015.10.079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 10/21/2015] [Accepted: 10/23/2015] [Indexed: 06/05/2023]
Abstract
In this work, fractionation of empty fruit bunch (EFB) by bisulfite pretreatment was studied for the production of bioethanol and high value products to achieve biorefinery of EFB. EFB was fractionated to solid and liquor components by bisulfite process. The solid components were used for bioethanol production by quasi-simultaneous saccharification and fermentation. The liquor components were then converted to furfural by hydrolysis with sulfuric acid. Preliminary results showed that the concentration of furfural was highest at 18.8g/L with 0.75% sulfuric acid and reaction time of 25min. The conversion of xylose to furfural was 82.5%. Furthermore, we attempted to fractionate the liquor into hemicellulose sugars and lignin by different methods for producing potential chemicals, such as xylose, xylooligosaccharide, and lignosulfonate. Our research showed that the combination of bisulfite pretreatment and resin separation could effectively fractionate EFB components to produce bioethanol and other high value chemicals.
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Affiliation(s)
- Liping Tan
- State Key Laboratory of Microbial Technology, Shandong University, Jinan City 250100, China
| | - Meimei Wang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan City 250100, China
| | - Xuezhi Li
- State Key Laboratory of Microbial Technology, Shandong University, Jinan City 250100, China
| | - Hongxing Li
- State Key Laboratory of Microbial Technology, Shandong University, Jinan City 250100, China
| | - Jian Zhao
- State Key Laboratory of Microbial Technology, Shandong University, Jinan City 250100, China.
| | - Yinbo Qu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan City 250100, China
| | - Yuen May Choo
- Malaysian Palm Oil Board, P.O. Box 10620, 50720 Kuala Lumpur, Malaysia
| | - Soh Kheang Loh
- Malaysian Palm Oil Board, P.O. Box 10620, 50720 Kuala Lumpur, Malaysia
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Li Z, Zhang H, Wang X, Zhang F, Li X. Further understanding the response mechanism of lignin content to bonding properties of lignocellulosic fibers by their deformation behavior. RSC Adv 2016. [DOI: 10.1039/c6ra22457a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The deformation behavior of lignocellulosic fibers was used to further understand the contradiction between their bonding and bulk properties.
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Affiliation(s)
- Zhiqiang Li
- Tianjin Key Laboratory of Pulp and Paper
- Tianjin University of Science and Technology
- Tianjin 300457
- P. R. China
| | - Hongjie Zhang
- Tianjin Key Laboratory of Pulp and Paper
- Tianjin University of Science and Technology
- Tianjin 300457
- P. R. China
- Shandong Huatai Paper Industry Co. Ltd
| | - Xin Wang
- Tianjin Key Laboratory of Pulp and Paper
- Tianjin University of Science and Technology
- Tianjin 300457
- P. R. China
| | - Fengshan Zhang
- Shandong Huatai Paper Industry Co. Ltd
- Huatai Group
- Dongying 257335
- P. R. China
| | - Xiaoliang Li
- Shandong Huatai Paper Industry Co. Ltd
- Huatai Group
- Dongying 257335
- P. R. China
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Wang Q, Liu S, Yang G, Chen J, Ni Y. Cationic polyacrylamide enhancing cellulase treatment efficiency of hardwood kraft-based dissolving pulp. BIORESOURCE TECHNOLOGY 2015; 183:42-46. [PMID: 25710682 DOI: 10.1016/j.biortech.2015.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 02/04/2015] [Accepted: 02/05/2015] [Indexed: 06/04/2023]
Abstract
Cellulase treatment for decreasing viscosity and increasing Fock reactivity of dissolving pulp is a promising approach to reduce the use of toxic chemicals, such as hypochlorite in the dissolving pulp manufacturing process in the industry. Improving the cellulase treatment efficiency during the process is of practical interest. In the present study, the concept of using cationic polyacrylamide (CPAM) to enhance the cellulase treatment efficiency was demonstrated. This was mainly attributed to the increased cellulase adsorption onto cellulose fibers based on the patching/bridging mechanism. Results showed that the cellulase adsorption was increased by about 20% with the addition of 250 ppm of CPAM under the same conditions as those of the control. It was found that the viscosity decrease and Fock reactivity increase for the cellulase treatment was enhanced from using CPAM. The CPAM-assisted cellulase treatment concept may provide a practical alternative to the present hypochlorite-based technology for viscosity control in the industry.
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Affiliation(s)
- Qiang Wang
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
| | - Shanshan Liu
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
| | - Guihua Yang
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China
| | - Jiachuan Chen
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China
| | - Yonghao Ni
- Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
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Wang Q, Liu S, Yang G, Chen J. Improvement membrane filterability in nanofiltration of prehydrolysis liquor of kraft dissolving pulp by laccase treatment. BIORESOURCE TECHNOLOGY 2015; 181:124-127. [PMID: 25643958 DOI: 10.1016/j.biortech.2015.01.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 01/06/2015] [Accepted: 01/09/2015] [Indexed: 06/04/2023]
Abstract
In this work, laccase treatment was employed to enhance nanofiltration process by lignin removal. Results showed that the membrane filterability was increased in terms of deionized water flux and PHL filtration process. On the other hand, the hemicellulosic sugars were negligible affected and can be concentrated to 172 g/L, which was increased about 300% from the original one. The combined laccase-nanofiltration process provides an alternative approach to utilize hemicellulosic sugars of PHL in an environmentally friendly way.
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Affiliation(s)
- Qiang Wang
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; Limerick Pulp and Paper Centre and Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada.
| | - Shanshan Liu
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China; Limerick Pulp and Paper Centre and Department of Chemical Engineering, University of New Brunswick, Fredericton, New Brunswick E3B 5A3, Canada
| | - Guihua Yang
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China
| | - Jiachuan Chen
- Key Lab of Paper Science and Technology of Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, China
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22
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Wang Q, Liu S, Yang G, Chen J. Modeling laccase-induced lignin removal in prehydrolysis liquor from kraft-based dissolving pulp production. BIORESOURCE TECHNOLOGY 2015; 175:638-41. [PMID: 25465791 DOI: 10.1016/j.biortech.2014.10.149] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 10/26/2014] [Accepted: 10/29/2014] [Indexed: 05/16/2023]
Abstract
Laccase treatment is a promising approach to remove lignin from prehydrolysis liquor (PHL) for value added utilization of hemicellulose rich waste streams. Modeling the lignin removal process is of practical interest for prediction and control of laccase treatment of PHL. The present study focused on the lignin removal through variation of laccase charge and treatment time. Results showed that the lignin removal may be divided into two phases, i.e. a fast initial phase followed by a second slow phase. A kinetic model based on the experimental results was developed, which can be used to predict the lignin removal of PHL during the laccase treatment.
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Affiliation(s)
- Qiang Wang
- Key Lab of Pulp & Paper Science and Technology of the Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, PR China; State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou, Guangdong Province 510640, PR China
| | - Shanshan Liu
- Key Lab of Pulp & Paper Science and Technology of the Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, PR China
| | - Guihua Yang
- Key Lab of Pulp & Paper Science and Technology of the Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, PR China
| | - Jiachuan Chen
- Key Lab of Pulp & Paper Science and Technology of the Ministry of Education, Qilu University of Technology, Jinan, Shandong Province 250353, PR China
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