Biomineralized manganese oxide mediated nitrogen-contained wastewater treatment
Bioresour Technol. 2024 Apr 9;400:130689. doi: 10.1016/j.biortech.2024.130689. Online ahead of print.ABSTRACTIn recent years, manganese (Mn) has emerged as an accelerator for nitrogen metabolism. However, the bioactivity of manganese is limited by the restricted contact between microbes and manganese minerals in the solid phase and by the toxicity of manganese to microbes. To enhance the bioactivity of solid-phase manganese, biomineralized manganese oxide (MnOx) modified by Lactobacillus was introduced. Nitrogen removal performance have confirmed the effective role of biomineralized MnOx in accelerating the removal of tota...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Yingying Liu Xinshan Song Zhongshuo Xu Yifei Wang Xiaoxiao Hou Yuhui Wang Xin Cao Wei Wang Source Type: research
Enhanced hydrolysis and methane yield of temperature-phased dewatered sludge anaerobic digestion by microbial electrolysis cell
This study investigated the effect of the integration of intermittent energization MEC in different phases of TPAD on the digestion of dewatered sludge. Thermophilic and MEC hydrolysis could release higher total ammonia nitrogen of 186.0% and 10.3% than control, mesophilic methanogenesis phase integrated with MEC relieved the ammonia inhibition and accelerated the acid utilization leading to the relief of acid accumulation. The ultimate methane yield of the TPAD integrated with MEC was increased by 118.9%, in which the relative abundance of Methanothermobacteria and Methanosarcina was increased. Therefore, intermittent ene...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Cheng Peng Tianfeng Wang Yutong Feng Xin Fan Jiazi Niu Jie Wang Wenqi Gao Youfei Zhou Weijie Hu Qingfang Zhang Source Type: research
L-tryptophan anaerobic fermentation for indole acetic acid production: Bacterial enrichment and effects of zero valent iron
Bioresour Technol. 2024 Apr 8:130691. doi: 10.1016/j.biortech.2024.130691. Online ahead of print.ABSTRACTIndole acetic acid (IAA) as a plant hormone, was one of the valuable products of anaerobic fermentation. However, the enriching method remained unknown. Moreover, whether zero-valent iron (ZVI) could enhance IAA production was unexplored. In this work, IAA producing bacteria Klebsiella (63 %) was enriched successfully. IAA average production rate and concentration were up to 3 mg/L/h and 56 mg/L. With addition of 1 g/L ZVI, IAA average production rate and concentration was increased for 2 and 3 folds. Mechanisms indicat...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Meng-Yao Ma Li-Li Hu Wen-Yan Xu Wei Zhang Source Type: research
Allophane improves anaerobic digestion of chicken manure by alleviating ammonia inhibition and intensifying direct interspecies electron transfer
Bioresour Technol. 2024 Apr 8:130692. doi: 10.1016/j.biortech.2024.130692. Online ahead of print.ABSTRACTSynthesized allophane was employed in anaerobic digestion of chicken manure to improve the stability and methane production under ammonia inhibition. Adding 0.5 %, 1.0 % and 1.5 % (w/w) allophane increased the methane production by 261 ∼ 350 % compared with the group without allophane addition. Further investigation indicated that the maximum adsorption capacity of allophane for NH4+-N achieved at 261.9 mg/g; it suggested that allophane adsorption potentially alleviated the ammonia inhibition, which also was reflected...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Yukun Liu Lanxing Ying Hui Li Mukesh Kumar Awasthi Dong Tian Jinsong He Jianmei Zou Yongjia Lei Fei Shen Source Type: research
Random mutagenesis and transcriptomics-guided rational engineering in Zygosaccharomyces rouxii for elevating D-arabitol biosynthesis
This study aimed to enhance the performance of Zygosaccharomyces rouxii to improve D-arabitol production. Firstly, a mutant strain Z. rouxii M075 obtained via atmospheric and room temperature plasma-mediated mutagenesis yielded 42.0 g/L of D-arabitol at 96 h, with about 50 % increase. Transcriptome-guided metabolic engineering of pathway key enzymes co-expression produced strain ZR-M3, reaching 48.9 g/L D-arabitol after 96 h fermentation. Finally, under optimized conditions, fed-batch fermentation of ZR-M3 in a 5 L bioreactor yielded an impressive D-arabitol titer of 152.8 g/L at 192 h, with a productivity of 0.8 g/L/h. Th...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Guoyan Zhang Hossain M Zabed Yufei Zhang Jia Li Junhua Yun Xianghui Qi Source Type: research
Effects of two strains of thermophilic nitrogen-fixing bacteria on nitrogen loss mitigation in cow dung compost
In this study, two strains of thermophilic nitrogen-fixing bacteria, NF1 (Bacillus subtilis) and NF2 (Azotobacter chroococcum), were added to cow dung compost both individually (NF1, NF2) and mixed together (NF3; mixing NF1 and NF2 at a ratio of 1:1). The results showed that NF1, NF2, and NF3 inoculants increased the total Kjeldahl nitrogen level by 38.43%-55.35%, prolonged the thermophilic period by 1-13 d, increased the seed germination index by 17.81%, and the emissions of NH3 and N2O were reduced by 25.11% and 42.75%, respectively. Microbial analysis showed that Firmicutes were the predominant bacteria at the thermophi...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Shaowen Wang Zhiming Xu Xuerui Xu Feng Gao Kang Zhang Xin Zhang Xiu Zhang Guoping Yang Zengqiang Zhang Ronghua Li Fusheng Quan Source Type: research
Magnetic nanoparticle-mediated enrichment technology combined with microfluidic single cell separation technology: A technology for efficient separation and degradation of functional bacteria in single cell liquid phase
In this study, an integrated technology of Magnetic Nanoparticle-mediated Enrichment (MME) and Microfluidic Single Cell separation (MSC) that breaks through the bottleneck of traditional separation and cultivation techniques and can efficiently obtain more in situ functional microorganisms from the environment was developed. MME technology was first used to enrich rapidly growing active bacteria in the environment. Subsequently, MSC technology was applied to isolate and incubate functional bacterial communities in situ and validate the degradation ability of individual bacteria. As a result, this study has changed the orde...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Yuanyan Xuan Meng Yin Yujiao Sun Meijun Liu Guomin Bai Zhidian Diao Bo Ma Source Type: research
Biogas upgrading performance and underlying mechanism in microbial electrolysis cell and anaerobic digestion integrated system
Bioresour Technol. 2024 Apr 8:130683. doi: 10.1016/j.biortech.2024.130683. Online ahead of print.ABSTRACTThe productivity and efficiency of two-chamber microbial electrolysis cell and anaerobic digestion integrated system (MEC-AD) were promoted by a complex of anaerobic granular sludge and iron oxides (Fe-AnGS) as inoculum. Results showed that MEC-AD with Fe-AnGS achieved biogas upgrading with a 23%-29% increase in the energy recovery rate of external circuit current and a 26%-31% decrease in volatile fatty acids. The energy recovery rate of MEC-AD remained at 52%-57%, indicating a stable operation performance. The selecti...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Yufang Wei Wangmi Chen Jiaqi Hou Xuejiao Qi Meiying Ye Ning Jiang Fanhua Meng Beidou Xi Mingxiao Li Source Type: research
Biomineralized manganese oxide mediated nitrogen-contained wastewater treatment
Bioresour Technol. 2024 Apr 8:130689. doi: 10.1016/j.biortech.2024.130689. Online ahead of print.ABSTRACTIn recent years, manganese (Mn) has emerged as an accelerator for nitrogen metabolism. However, the bioactivity of manganese is limited by the restricted contact between microbes and manganese minerals in the solid phase and by the toxicity of manganese to microbes. To enhance the bioactivity of solid-phase manganese, biomineralized manganese oxide (MnOx) modified by Lactobacillus was introduced. Nitrogen removal performance have confirmed the effective role of biomineralized MnOx in accelerating the removal of total in...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Yingying Liu Xinshan Song Zhongshuo Xu Yifei Wang Xiaoxiao Hou Yuhui Wang Xin Cao Wei Wang Source Type: research
Enhanced hydrolysis and methane yield of temperature-phased dewatered sludge anaerobic digestion by microbial electrolysis cell
This study investigated the effect of the integration of intermittent energization MEC in different phases of TPAD on the digestion of dewatered sludge. Thermophilic and MEC hydrolysis could release higher total ammonia nitrogen of 186.0% and 10.3% than control, mesophilic methanogenesis phase integrated with MEC relieved the ammonia inhibition and accelerated the acid utilization leading to the relief of acid accumulation. The ultimate methane yield of the TPAD integrated with MEC was increased by 118.9%, in which the relative abundance of Methanothermobacteria and Methanosarcina was increased. Therefore, intermittent ene...
Source: Bioresource Technology - April 10, 2024 Category: Biotechnology Authors: Cheng Peng Tianfeng Wang Yutong Feng Xin Fan Jiazi Niu Jie Wang Wenqi Gao Youfei Zhou Weijie Hu Qingfang Zhang Source Type: research
Elemental sulfur biorecovery from phosphogypsum using oxygen-membrane biofilm reactor: Bioreactor parameters optimization, metagenomic analysis and metabolic prediction of the biofilm activity
Bioresour Technol. 2024 Apr 7:130680. doi: 10.1016/j.biortech.2024.130680. Online ahead of print.ABSTRACTThis work investigated elemental sulfur (S0) biorecovery from Phosphogypsum (PG) using sulfur-oxidizing bacteria in an O2-based membrane biofilm reactor (MBfR). The system was first optimized using synthetic sulfide medium (SSM) as influent, then switched to biogenic sulfide medium (BSM) generated by biological reduction of PG alkaline leachate. The results using SSM had high sulfide-oxidation efficiency (98 %), sulfide to S0 conversion (∼90 %), and S0 production rate up to 2.7 g S0/(m2.d), when the O2/S ratio was ∼...
Source: Bioresource Technology - April 9, 2024 Category: Biotechnology Authors: Ayoub Bounaga Anwar Alsanea Mohammed Danouche Bruce E Rittmann Chen Zhou Rachid Boulif Youssef Zeroual Rachid Benhida Karim Lyamlouli Source Type: research
Elemental sulfur biorecovery from phosphogypsum using oxygen-membrane biofilm reactor: Bioreactor parameters optimization, metagenomic analysis and metabolic prediction of the biofilm activity
Bioresour Technol. 2024 Apr 7:130680. doi: 10.1016/j.biortech.2024.130680. Online ahead of print.ABSTRACTThis work investigated elemental sulfur (S0) biorecovery from Phosphogypsum (PG) using sulfur-oxidizing bacteria in an O2-based membrane biofilm reactor (MBfR). The system was first optimized using synthetic sulfide medium (SSM) as influent, then switched to biogenic sulfide medium (BSM) generated by biological reduction of PG alkaline leachate. The results using SSM had high sulfide-oxidation efficiency (98 %), sulfide to S0 conversion (∼90 %), and S0 production rate up to 2.7 g S0/(m2.d), when the O2/S ratio was ∼...
Source: Bioresource Technology - April 9, 2024 Category: Biotechnology Authors: Ayoub Bounaga Anwar Alsanea Mohammed Danouche Bruce E Rittmann Chen Zhou Rachid Boulif Youssef Zeroual Rachid Benhida Karim Lyamlouli Source Type: research
Rapid establishment of municipal sewage partial denitrification-anammox for nitrogen removal through inoculation with side-stream anammox biofilm without domestication
Bioresour Technol. 2024 Apr 6:130679. doi: 10.1016/j.biortech.2024.130679. Online ahead of print.ABSTRACTMainstream partial denitrification anammox was achieved through inoculation of side-stream mature partial nitritation anammox biofilm without domestication. The contribution of anammox to nitrogen removal was 29.4 %. Moreover, prolonging anoxic hydraulic retention time and introducing side-stream nitrite under different carbon/nitrogen ratios enriched anammox bacteria. The abundance of anammox bacteria increased by ∼ 10 times ((2.19 ± 0.17) × 1012 copies gene / g dry sludge) with a total relative abundance of 18.51 ...
Source: Bioresource Technology - April 8, 2024 Category: Biotechnology Authors: Shenhua Yang Yongzhen Peng Feng Hou Hongtao Pang Leyong Jiang Shihao Sun Jialin Li Liang Zhang Source Type: research
A modified cultivation strategy to enhance biomass production and lipid accumulation of Tetradesmus obliquus FACHB-14 with copper stress and light quality induction
This study offers insights into the potential application of Tetradesmus obliquus in biofuel production.PMID:38588782 | DOI:10.1016/j.biortech.2024.130677 (Source: Bioresource Technology)
Source: Bioresource Technology - April 8, 2024 Category: Biotechnology Authors: Yuanrong Jin Yinting Li Yingying Qi Qun Wei Gairen Yang Xiangmeng Ma Source Type: research
Thermo-catalytic pyrolysis of sewage sludge and techno-economic analysis: The effect of synthetic zeolites and natural sourced catalysts
Bioresour Technol. 2024 Apr 7;400:130676. doi: 10.1016/j.biortech.2024.130676. Online ahead of print.ABSTRACTThis work focuses to the value added utilization of animal sewage sludge into gases, bio-oil and char using synthetic zeolite (ZSM-5 and Y-zeolite) and natural sourced (diatomite, kaolin, perlite) materials as catalysts. Pyrolysis was performed in a one-stage bench-scale reactor at temperatures of 400 and 600 °C. The catalyst was mixed with the raw material before the pyrolysis. Catalysts had a significant effect on the yield of products, because the amount of volatile products was higher in their presence, than wi...
Source: Bioresource Technology - April 8, 2024 Category: Biotechnology Authors: B Csutoras N Miskolczi Source Type: research
