Potential directions for future development of mainstream partial nitrification-anammox processes: Ammonia-oxidizing archaea as novel functional microorganisms providing nitrite
Bioresour Technol. 2024 Mar 16:130605. doi: 10.1016/j.biortech.2024.130605. Online ahead of print.ABSTRACTThe application of ammonia-oxidizing archaea (AOA)-based partial nitrification-anammox (PN-A) for mainstream wastewater treatment has attracted research interest because AOA can maintain higher activity in low-temperature environments and they have higher affinity for oxygen and ammonia-nitrogen compared with ammonia-oxidizing bacteria (AOB), thus facilitating stabilized nitrite production, deep removal of low-ammonia, and nitrite-oxidizing bacteria suppression. Moreover, the low affinity of AOA for ammonia makes them ...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Kehuan Guo Dong Li Tongyao Hao Luyao Teng Shuai Li Huiping Zeng Jie Zhang Source Type: research
Effects of hematite on two types of dissolved organic compounds in lignocellulosic anaerobic hydrolysate: Lignin-derived aromatic compounds and denitrifying carbon sources
This study aims to investigate the influence of hematite on lignin-derived aromatic compounds and denitrifying carbon sources, as well as to identify iron-reducing bacteria that utilize lignin-derived aromatic compounds as electron donors. The findings revealed that hematite facilitated the anaerobic fermentation of plant biomass, resulting in the production of small molecular organic acids. Moreover, biodegradation of lignin-derived aromatic compounds led to the formation of phenolic acids, while an increased generation of denitrifying carbon sources enhanced nitrogen removal efficiency by 13.84 %. Additionally, due to ad...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Xinjing Li Xiangwei Huang Xingbao Hu Yunxiao Chong Source Type: research
Novel manganese and nitrogen co-doped biochar based on sodium bicarbonate activation for efficient removal of bisphenol A: Mechanism insight and role analysis of manganese and nitrogen by combination of characterizations, experiments and density functional theory calculations
Bioresour Technol. 2024 Mar 16:130608. doi: 10.1016/j.biortech.2024.130608. Online ahead of print.ABSTRACTA novel porous manganese and nitrogen co-doped biochar (Mn-N@SBC) was synthesized via one-step pyrolysis, utilizing loofah agricultural waste as the precursor and NaHCO3 as the activator. The behavior of bisphenol A adsorbed on Mn-N@SBC was evaluated using static batch adsorption experiments. Compared to direct manganese-nitrogen co-doping, co-doping based on NaHCO3 activation significantly increased the specific surface area (231 to 1027 m2·g-1) and adsorption capacity (15 to 351 mg·g-1). Wide pH (2-10) and good res...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Wenlong Wu Jinwei Zhang Weijie Zhu Shouhui Zhao Yuchen Gao Yan Li Lei Ding Heng Ding Source Type: research
Unlocking synergies: Harnessing the potential of biological methane sequestration through metabolic coupling between Methylomicrobium alcaliphilum 20Z and Chlorella sp. HS2
Bioresour Technol. 2024 Mar 16:130607. doi: 10.1016/j.biortech.2024.130607. Online ahead of print.ABSTRACTA halotolerant consortium between microalgae and methanotrophic bacteria could effectively remediate in situ CH4 and CO2, particularly using saline wastewater sources. Herein, Methylomicrobium alcaliphilum 20Z was demonstrated to form a mutualistic association with Chlorella sp. HS2 at a salinity level above 3.0%. Co-culture significantly enhanced the growth of both microbes, independent of initial inoculum ratios. Additionally, increased methane provision in enclosed serum bottles led to saturated methane removal. Sub...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Jin-Ho Yun Hyewon Lee Jang-Won Nam Minji Ko Jaehyun Park Dae-Hee Lee Seung-Goo Lee Hee-Sik Kim Source Type: research
Formation/characterization of humin-mediated anaerobic granular sludge and enhanced methanogenic performance
This study presents a novel method for accelerating the granulation of methanogenic anaerobic granular sludge (AnGS) in an upflow anaerobic sludge blanket (UASB) reactor using solid-phase humin (HM). The results demonstrated that HM-mediated AnGS (HM-AnGS) formed rapidly within 50 days. The increase in particle size, settling velocity and mechanical strength was attributed to the rapid granulation of the HM-AnGS. The maximum methane yield of the HM-AnGS was 5-fold higher than that of the control group. This is consistent with the findings, which showed that HM-AnGS had 3.2-3.4 times more methyl-coenzyme M reductase (Mcr) a...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Ningli Zhou Zhixing Xiao Dan Chen Source Type: research
Insight into performance of nitrogen removal enhanced by adding lactic acid-rich food waste fermentation liquid as carbon source in municipal wastewater treatment
Bioresour Technol. 2024 Mar 16:130602. doi: 10.1016/j.biortech.2024.130602. Online ahead of print.ABSTRACTLactic acid-rich fermentation liquid (LAFL) of food waste is found to act as a promising alternative carbon source for nitrogen removal in wastewater treatment. Here, LAFL was employed to investigate its impacts on nitrogen removal during raw municipal wastewater treatment with a comparison to sodium acetate (NaAc). Results indicated that nitrogen removals were comparable when incorporated with LAFL and NaAc (92.89 % v.s. 91.23 %). Unlike the utilization of NaAc, using LAFL could avoid suppressing the relative abundanc...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Mingjiang Zhang Guangliang Zhao Xinxin Wang Bo Zhou Yujun Zhou Dianzhan Wang Jianru Liang Lixiang Zhou Source Type: research
Coupling of gene regulation and carrier modification manipulates bacterial biofilms as robust living catalysts
Bioresour Technol. 2024 Mar 16:130604. doi: 10.1016/j.biortech.2024.130604. Online ahead of print.ABSTRACTThe biofilm of an engineered strain is limited by slow growth and low yield, resulting in an unsatisfactory ability to resist external stress and promote catalytic efficiency. Here, biofilms used as robust living catalysts were manipulated through dual functionalized gene regulation and carrier modification strategy. The results showed that gene overexpression regulates the autoinducer-2 activity, extracellular polymeric substance content and colony behavior of Escherichia coli, and the biofilm yield of csgD overexpres...
Source: Bioresource Technology - March 18, 2024 Category: Biotechnology Authors: Cheng-Hai Yan Yu-Fan Zhan Huan Chen Richard A Herman Yan Xu Marriam Khurshid Lu-Chan Gong Shuai You Jun Wang Source Type: research
Isolation, identification and whole-genome analysis of an Achromobacter strain with a novel sulfamethazine resistance gene and sulfamethazine degradation gene cluster
This study reveals the novel molecular resistance and degradation mechanisms and genetic evolution of an SM2-degrading strain, providing insights into the bioremediation of sulfonamide-contaminated environments.PMID:38493935 | DOI:10.1016/j.biortech.2024.130598 (Source: Bioresource Technology)
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Luping Zeng Hongwei Du Xianke Lin Ruomei Liao Ying Man Huaiyang Fang Yang Yang Ran Tao Source Type: research
Life cycle assessment and techno-economic analysis of wood-based biorefineries for cellulosic ethanol production
Bioresour Technol. 2024 Mar 15;399:130595. doi: 10.1016/j.biortech.2024.130595. Online ahead of print.ABSTRACTPoplar is widely used in the paper industry and accompanied by abundant branches waste, which is potential feedstock for bioethanol production. Acid-chlorite pretreatment can selectively remove lignin, thereby significantly increasing enzymatic efficiency. Moreover, lignin residues valorization via gasification-syngas fermentation can achieve higher fuel yield. Herein, environmental and economic aspects were conducted to assess technological routes, which guides further process optimization. Life cycle assessment r...
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Qian Qian Zhongyang Luo Haoran Sun Qi Wei Jingkang Shi Longfei Li Source Type: research
Enhancing wastewater treatment efficiency: A hybrid technology perspective with energy-saving strategies
Bioresour Technol. 2024 Mar 15:130593. doi: 10.1016/j.biortech.2024.130593. Online ahead of print.ABSTRACTThe study aimed to investigate how hybrid technology, combined with various intermittent aeration (IA) strategies, contributes to reducing the energy costs of wastewater treatment while simultaneously ensuring a high treatment efficiency. Even with IA subphases lasting half as long as those without aeration, and oxygen levels reduced from 3.5 to 1.5 mg O2/L, pollutants removal efficiency remains robust, allowing for a 1.41-fold reduction in energy consumption (EO). Hybrid technology led to a 1.34-fold decrease in EO, a...
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Olga Zajac Magdalena Zielinska Monika Zubrowska-Sudol Source Type: research
Enhanced triolein and ethyl ferulate interesterification performance by CRL-AuNPs
This study established a Candida rugosa lipase (CRL) system to catalyze triolein and ethyl ferulate interesterification. The products were identified, and the binding mode between the substrates and CRL was predicted through molecular docking. Three methods for preparing CRL-AuNPs were proposed and characterized. It was found that the addition of 40 mL of 15 nm gold nanoparticles increased the CRL activity from 3.05 U/mg to 4.75 U/mg, but the hybridization efficiency was only 32.7 %. By using 4 mL of 0.1 mg/mL chloroauric acid, the hybridization efficiency was improved to 50.7 %, but the enzyme activity was sharply decreas...
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Zhang Kai Xin Jiaying Lu Xuechun Source Type: research
Biosynthetic pathway redesign in non-conventional yeast for enhanced production of cembratriene-ol
Bioresour Technol. 2024 Mar 15:130596. doi: 10.1016/j.biortech.2024.130596. Online ahead of print.ABSTRACTCembratriene-ol (CBT-ol), a plant-derived macrocyclic diterpene with notable insecticidal activity, has attracted considerable attention with respect to the development of sustainable and green biopesticides. Currently, CBT-ol production is limited by an inefficient and costly plant extraction strategy. Herein, CBT-ol production was enhanced by redesigning the CBT-ol biosynthetic pathway in Candida tropicalis, with subsequent truncation of CBT-ol synthase further increasing CBT-ol production. Moreover, bottlenecks in t...
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Lihua Zhang Cheng Fan Haiquan Yang Yuanyuan Xia Wei Shen Xianzhong Chen Source Type: research
Valorization of Nannochloropsis oceanica for integrated co-production of violaxanthin cycle carotenoids
In this study, the economical microalga Nannochloropsis oceanica was identified as an accumulator of violaxanthin cycle carotenoids, including violaxanthin, antheraxanthin, and zeaxanthin. Notably, a novel and competent approach for the integrated co-production of violaxanthin cycle carotenoids was explored, encompassing four steps: microalgal cultivation, solvent extraction, ODS open-column chromatography, and ethanol precipitation. Under optimal co-production conditions, the purities of the obtained violaxanthin, antheraxanthin, and zeaxanthin all exceeded 92%, with total recovery rates of approximately 51%, 40%, and 60%...
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Rui Yin GengJie Zhuang Yuhui Lei Jichang Han Yanrong Li Jinrong Zhang Xiaojun Yan Source Type: research
Scale-up of microbial lipid and bioethanol production from oilcane
This study describes the processing of oilcane stems into juice and hydrothermally pretreated lignocellulosic hydrolysate and their valorization to ethanol and microbial oil using Saccharomyces cerevisiae and engineered Rhodosporidium toruloides strains, respectively. A bioethanol titer of 106 g/L was obtained from S. cerevisiae grown on oilcane juice in a 3 L fermenter, and a lipid titer of 8.8 g/L was obtained from R. toruloides grown on oilcane hydrolysate in a 75 L fermenter. Oil was extracted from the R. toruloides cells using supercritical CO2, and the observed fatty acid profile was consistent with previous studies ...
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Narendra Naik Deshavath William Woodruff Fred Eller Vionna Susanto Cindy Yang Christopher V Rao Vijay Singh Source Type: research
Isolation, identification and whole-genome analysis of an Achromobacter strain with a novel sulfamethazine resistance gene and sulfamethazine degradation gene cluster
This study reveals the novel molecular resistance and degradation mechanisms and genetic evolution of an SM2-degrading strain, providing insights into the bioremediation of sulfonamide-contaminated environments.PMID:38493935 | DOI:10.1016/j.biortech.2024.130598 (Source: Bioresource Technology)
Source: Bioresource Technology - March 17, 2024 Category: Biotechnology Authors: Luping Zeng Hongwei Du Xianke Lin Ruomei Liao Ying Man Huaiyang Fang Yang Yang Ran Tao Source Type: research
