Integration of lactic acid biorefinery with treatment of red mud from alumina refinery: win-win paradigm for waste valorization
Bioresour Technol. 2024 Apr 25:130743. doi: 10.1016/j.biortech.2024.130743. Online ahead of print.ABSTRACTThe cost of detoxification and neutralization poses certain challenges to the development of an economically viable lactic acid biorefinery with lignocellulosic biomass as feedstock. Herein, red mud, an alkaline waste, was explored as both a detoxifying agent and a neutralizer. Red mud treatment of lignocellulosic hydrolysate effectively removed the inhibitors generated in dilute acid pretreatment, improving the lactic acid productivity from 1.0 g/L·h-1 to 1.9 g/L·h-1 in later fermentation. In addition, red mud could...
Source: Bioresource Technology - April 27, 2024 Category: Biotechnology Authors: Binyuan Gao Xi Liu Yudie Wu Haina Cheng Hongbo Zhou Yuguang Wang Zhu Chen Source Type: research
Light energy utilization and microbial catalysis for enhanced biohydrogen: Ternary coupling system of triethanolamine-mediated Fe@C-Rhodobacter sphaeroides
This study investigated the mediating effect of Triethanolamine on Fe@C-Rhodobacter sphaeroides hybrid photosynthetic system to achieve efficient biohydrogen production. The biocompatible Fe@C generates excited electrons upon exposure to light, releasing ferrum for nitrogenase synthesis, and regulating the pH of the fermentation environment. Triethanolamine was introduced to optimize the electron transfer chain, thereby improving system stability, prolonging electron lifespan, and facilitating ferrum corrosion. This, in turn, stimulated the lactic acid synthetic metabolic pathway of Rhodobacter sphaeroides, resulting in in...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Qiushi Jiang Yanjing Li Minmin Wang Wen Cao Xueying Yang Sihu Zhang Liejin Guo Source Type: research
Continuous catalytic production of 1,3-dihydroxyacetone: Sustainable approach combining perfusion cultures and immobilized cells
In this study, a new integrated continuous production and synchronous separation (ICSS) system was constructed using hollow fiber columns and perfusion culture technology. Additionally, a cell reactivation technique was implemented to extend the biocatalytic ability of cells. Compared with fed-batch fermentation, the ICSS system operated for 360 h, yielding a total DHA of 1237.8 ± 15.8 g. The glycerol conversion rate reached 97.7 %, with a productivity of 3.44 g·L-1·h-1, representing 485.0 % increase in DHA production. ICSS system exhibited strong operational characteristics and excellent performance, indicating signifi...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Yang Sun Tang Liu Jianqi Nie Jie Yan Jiacheng Tang Kuiqi Jin Chunyang Li Hua Li Yupeng Liu Zhonghu Bai Source Type: research
Hydrodynamic cultivation of aeration-free oxygenic photogranules is favored by sufficient amounts of organic carbon
This study investigated the hydrodynamic photogranulation in three types of wastewater with the same total carbon concentration but different inorganic/organic carbon compositions, each operated at two replicated reactors. Results showed that photogranulation failed in reactors fed with only inorganic carbon. In reactors with equal inorganic and organic carbon, loose-structured OPGs formed but then disintegrated. Comparatively, reactors treating organic carbon-based wastewater obtained regular and dense OPGs with better settleability, lower effluent turbidity, excellent structural stability, and higher carbon assimilation ...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Junrong Li Liaofan Tang Yuqing Zhang Mingming Gao Shuguang Wang Xinhua Wang Source Type: research
Biomass to green surfactants: Microwave-assisted transglycosylation of wheat bran for alkyl glycosides production
This study introduces microwave-assisted transglycosylation in transforming wheat bran, a substantial agricultural side stream, into these valuable compounds. Compared to traditional heating, microwave-assisted processing significantly enhances the product yield by 53 % while reducing the reaction time by 72 %, achieving a yield of 29 % within 5 h. This enhancement results from the microwave's capacity to activate intermolecular hydrogen and glycosidic bonds, thereby facilitating transglycosylation. Life-cycle assessment (LCA) and techno-economic analysis (TEA) demonstrate the benefits of microwave heating in reducing ener...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Junyu Mi Jiong Cheng Kian Hong Ng Ning Yan Source Type: research
Enzyme modified biodegradable plastic preparation and performance in anaerobic co-digestion with food waste
In conclusion, under anaerobic co-digestion, the modified the plastic not only achieved effective degradation but also facilitated the co-digestion process.PMID:38670291 | DOI:10.1016/j.biortech.2024.130739 (Source: Bioresource Technology)
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Wenjie Liu Shizhuo Wang Songting He Yang Shi Cheng Hou Xintong Jiang Yuanbo Song Tao Zhang Yalei Zhang Zheng Shen Source Type: research
Reverse electron transfer: Novel anaerobic methanogenesis pathway regulated through exogenous CO < sub > 2 < /sub > synergized with biochar
This study examines the regulatory mechanisms by which exogenous CO2 affects RET and demonstrates that biochar maximizes CO2 solubility at 25.8 mmol/L to enhance effects further. CO2 synergized with biochar significantly increases cumulative methane production and propionate degradation rate. From the bioenergetic perspective, CO2 decreases energy level to a maximum of -87 kJ/mol, strengthening the thermodynamic viability. The underlying mechanism can be attributed to RET promotion, as indicated by increased formate dehydrogenase and enrichment of H2/formate-producing bacteria with their partner Methanospirillum hungatei. ...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Yang Qiu Jingxin Zhang Yen Wah Tong Yiliang He Source Type: research
Conventional activated sludge vs. photo-sequencing batch reactor for enhanced nitrogen removal in municipal wastewater: Microalgal-bacterial consortium and pathogenic load insights
Bioresour Technol. 2024 Apr 24;401:130735. doi: 10.1016/j.biortech.2024.130735. Online ahead of print.ABSTRACTMunicipal wastewater treatment plants are mostly based on traditional activated sludge (AS) processes. These systems are characterised by major drawbacks: high energy consumption, large amount of excess sludge and high greenhouse gases emissions. Treatment through microalgal-bacterial consortia (MBC) is an alternative and promising solution thanks to lower energy consumption and emissions, biomass production and water sanitation. Here, microbial difference between a traditional anaerobic sludge (AS) and a consortiu...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Elisa Clagnan Serena Petrini Silvia Pioli Federica Piergiacomo Atif Aziz Chowdhury Lorenzo Brusetti Paola Foladori Source Type: research
Light energy utilization and microbial catalysis for enhanced biohydrogen: Ternary coupling system of triethanolamine-mediated Fe@C-Rhodobacter sphaeroides
This study investigated the mediating effect of Triethanolamine on Fe@C-Rhodobacter sphaeroides hybrid photosynthetic system to achieve efficient biohydrogen production. The biocompatible Fe@C generates excited electrons upon exposure to light, releasing ferrum for nitrogenase synthesis, and regulating the pH of the fermentation environment. Triethanolamine was introduced to optimize the electron transfer chain, thereby improving system stability, prolonging electron lifespan, and facilitating ferrum corrosion. This, in turn, stimulated the lactic acid synthetic metabolic pathway of Rhodobacter sphaeroides, resulting in in...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Qiushi Jiang Yanjing Li Minmin Wang Wen Cao Xueying Yang Sihu Zhang Liejin Guo Source Type: research
Continuous catalytic production of 1,3-dihydroxyacetone: Sustainable approach combining perfusion cultures and immobilized cells
In this study, a new integrated continuous production and synchronous separation (ICSS) system was constructed using hollow fiber columns and perfusion culture technology. Additionally, a cell reactivation technique was implemented to extend the biocatalytic ability of cells. Compared with fed-batch fermentation, the ICSS system operated for 360 h, yielding a total DHA of 1237.8 ± 15.8 g. The glycerol conversion rate reached 97.7 %, with a productivity of 3.44 g·L-1·h-1, representing 485.0 % increase in DHA production. ICSS system exhibited strong operational characteristics and excellent performance, indicating signifi...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Yang Sun Tang Liu Jianqi Nie Jie Yan Jiacheng Tang Kuiqi Jin Chunyang Li Hua Li Yupeng Liu Zhonghu Bai Source Type: research
Hydrodynamic cultivation of aeration-free oxygenic photogranules is favored by sufficient amounts of organic carbon
This study investigated the hydrodynamic photogranulation in three types of wastewater with the same total carbon concentration but different inorganic/organic carbon compositions, each operated at two replicated reactors. Results showed that photogranulation failed in reactors fed with only inorganic carbon. In reactors with equal inorganic and organic carbon, loose-structured OPGs formed but then disintegrated. Comparatively, reactors treating organic carbon-based wastewater obtained regular and dense OPGs with better settleability, lower effluent turbidity, excellent structural stability, and higher carbon assimilation ...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Junrong Li Liaofan Tang Yuqing Zhang Mingming Gao Shuguang Wang Xinhua Wang Source Type: research
Biomass to green surfactants: Microwave-assisted transglycosylation of wheat bran for alkyl glycosides production
This study introduces microwave-assisted transglycosylation in transforming wheat bran, a substantial agricultural side stream, into these valuable compounds. Compared to traditional heating, microwave-assisted processing significantly enhances the product yield by 53 % while reducing the reaction time by 72 %, achieving a yield of 29 % within 5 h. This enhancement results from the microwave's capacity to activate intermolecular hydrogen and glycosidic bonds, thereby facilitating transglycosylation. Life-cycle assessment (LCA) and techno-economic analysis (TEA) demonstrate the benefits of microwave heating in reducing ener...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Junyu Mi Jiong Cheng Kian Hong Ng Ning Yan Source Type: research
Enzyme modified biodegradable plastic preparation and performance in anaerobic co-digestion with food waste
In conclusion, under anaerobic co-digestion, the modified the plastic not only achieved effective degradation but also facilitated the co-digestion process.PMID:38670291 | DOI:10.1016/j.biortech.2024.130739 (Source: Bioresource Technology)
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Wenjie Liu Shizhuo Wang Songting He Yang Shi Cheng Hou Xintong Jiang Yuanbo Song Tao Zhang Yalei Zhang Zheng Shen Source Type: research
Reverse electron transfer: Novel anaerobic methanogenesis pathway regulated through exogenous CO < sub > 2 < /sub > synergized with biochar
This study examines the regulatory mechanisms by which exogenous CO2 affects RET and demonstrates that biochar maximizes CO2 solubility at 25.8 mmol/L to enhance effects further. CO2 synergized with biochar significantly increases cumulative methane production and propionate degradation rate. From the bioenergetic perspective, CO2 decreases energy level to a maximum of -87 kJ/mol, strengthening the thermodynamic viability. The underlying mechanism can be attributed to RET promotion, as indicated by increased formate dehydrogenase and enrichment of H2/formate-producing bacteria with their partner Methanospirillum hungatei. ...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Yang Qiu Jingxin Zhang Yen Wah Tong Yiliang He Source Type: research
Conventional activated sludge vs. photo-sequencing batch reactor for enhanced nitrogen removal in municipal wastewater: Microalgal-bacterial consortium and pathogenic load insights
Bioresour Technol. 2024 Apr 24:130735. doi: 10.1016/j.biortech.2024.130735. Online ahead of print.ABSTRACTMunicipal wastewater treatment plants are mostly based on traditional activated sludge (AS) processes. These systems are characterised by major drawbacks: high energy consumption, large amount of excess sludge and high greenhouse gases emissions. Treatment through microalgal-bacterial consortia (MBC) is an alternative and promising solution thanks to lower energy consumption and emissions, biomass production and water sanitation. Here, microbial difference between a traditional anaerobic sludge (AS) and a consortium-ba...
Source: Bioresource Technology - April 26, 2024 Category: Biotechnology Authors: Elisa Clagnan Serena Petrini Silvia Pioli Federica Piergiacomo Atif Aziz Chowdhury Lorenzo Brusetti Paola Foladori Source Type: research
