Article
Multidisciplinary Sciences
Chanaporn Trakunjae, Antika Boondaeng, Waraporn Apiwatanapiwat, Akihiko Kosugi, Takamitsu Arai, Kumar Sudesh, Pilanee Vaithanomsat
Summary: Poly-beta-hydroxybutyrate (PHB) is a biodegradable polymer produced by bacteria and archaea as a carbon and energy reserve. The study demonstrated the successful production of PHB by a rare actinomycete species, Rhodococcus pyridinivorans BSRT1-1, using response surface methodology (RSM) to optimize production. The optimized medium significantly increased biomass and PHB content, with properties of the produced PHB comparable to commercial counterparts.
SCIENTIFIC REPORTS
(2021)
Article
Microbiology
Selina Engelhart-Straub, Martina Haack, Dania Awad, Thomas Brueck, Norbert Mehlmer
Summary: This study investigates the substrate adaptability of the oleaginous bacterium Rhodococcus erythropolis and determines the optimum carbon and nitrogen concentrations for achieving the highest biomass, lipid, and carotenoid yields. These results provide insights for optimizing media composition in the production of valuable oleochemicals and pigments.
Article
Chemistry, Multidisciplinary
Yuanyuan Zhang, Qiuxiang Zhao, Hui Tang, Huiling Li, Depeng Li, Zhiyong Wang, Xin Gao, Fanye Wang
Summary: Enantiopure esomeprazole was successfully synthesized via catalysis by immobilized cells, resulting in high yield and enantiomeric purity. Optimization of process parameters led to improved substrate tolerance and product selectivity, showing promising potential for efficient synthesis of chiral sulfoxides.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
Anahita Hosseini Zabet, Salman Ahmady-Asbchin
Summary: In this study, cadmium and nickel resistant bacteria were isolated from an industrial factory in Iran, and their biosorption efficiency was optimized using single-factor and central composite design methods. The analysis revealed that under the conditions of pH 7.0, 45 degrees C, and 1.5 g/L biomass dose, the biosorption efficiency for cadmium and nickel by the bacteria reached 92.43% and 88.45% respectively. The study also confirmed the adsorption of heavy metal ions by the bacterial biomass through Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray spectroscopy.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2023)
Article
Microbiology
Die Zhang, Zhi-you Su, Lei Li, Wei-zhuo Tang
Summary: Two novel Rhodococcus strains, LHW50502(T) and LHW51113(T), isolated from marine sponges in Xisha Island, Hainan Province, PR China, represent two distinct species within the genus Rhodococcus. They are proposed to be named as Rhodococcus spongiicola sp. nov. and Rhodococcus xishaensis sp. nov., respectively. These strains share almost identical 16S rRNA gene sequences but show relatively low similarities with previously characterized Rhodococcus species.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2021)
Article
Environmental Sciences
A. Sundarajoo, M. N. Maniyam, H. H. Azman, H. Abdullah, N. S. Yaacob
Summary: The study successfully utilized Rhodococcus strain UCC 0010 for decolourization of Congo red diazo dye, reducing processing time and improving decolourizing activity. The discovery of novel rhodococcal laccase and the strain's ability to effectively remove the phytotoxicity of Congo red on plants provide important insights for the application of biocatalysts in treating textile wastewater.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Review
Biotechnology & Applied Microbiology
Miroslav Patek, Michal Grulich, Jan Nesvera
Summary: This review comprehensively describes the stress responses of Rhodococcus strains, including environmental stresses, stress-inducing compounds, starvation, and stresses encountered during biotechnological applications. It also discusses the global regulation of stress responses in Rhodococcus and potential connections to biotechnological processes.
BIOTECHNOLOGY ADVANCES
(2021)
Article
Food Science & Technology
Isaac Yaw Massey, Tangjian Peng, Cai Danping, Fei Yang
Summary: This study assessed the biodegradation characteristics of strain YF1 against MC-LR under different environmental factors. The optimal conditions for biodegrading MC-LR using YF1 were determined using response surface methodology. The optimal conditions were found to be 30 degrees C, pH 7, and 3 mu g/mL MC-LR with a biodegradation efficiency of 100%.
Article
Engineering, Chemical
Thitichaya Khamkong, Watsana Penkhrue, Saisamorn Lumyong
Summary: This study focused on optimizing the production medium and conditions for polyhydroxyalkanoates (PHAs), a type of biodegradable bioplastics. The best isolate, HD34 strain, was identified and the optimal medium composition and conditions were determined. The results showed high PHA content and yield, and the synthesized polymer was characterized as polyhydroxybutyrate (PHB).
Article
Energy & Fuels
Maegala Nallapan Maniyam, Hazeeq Hazwan Azman, Hasdianty Abdullah, Nor Suhaila Yaacob
Summary: This study investigates an affordable and green approach using a tropical Rhodococcus pyridinivorans strain to decolourize crystal violet from synthetic effluent. The results show that the presence of interactive effects between temperature, the concentration of maltose, and the size of inoculum significantly reduces the incubation period and improves the decolourization efficiency. Immobilized cells also show higher decolourization rates and can be recycled for multiple cycles without toxicity.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Food Science & Technology
Geum-Jae Jeong, Fazlurrahman Khan, Min-Gyun Kang, Kyung-Jin Cho, Geon-Woo Park, Du-Min Jo, Seul-Ki Park, Young-Mog Kim
Summary: This study aims to optimize the conditions for enriching rice paper with laver and tapioca starch, and investigates the effects on sensory evaluation, physicochemical properties, and nutritional value. The results show that laver powder positively influences the taste, flavor, and appearance of the rice paper. LTRP has higher protein content, essential amino acid content, antioxidant content, and total phenolic content compared to commercial rice paper. The enrichment with laver powder and tapioca starch improves the nutritional value and sensory characteristics of the rice paper.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Microbiology
Lei Miao, Siyuan Chen, Hua Yang, Yaqi Hong, Liwen Sun, Jie Yang, Guanjun Sun, Yi Liu, Chunyan Li, Hailian Zang, Yi Cheng
Summary: The study investigated the use of immobilized TC1, which consists of the TCC-degrading strain Rhodococcus rhodochrous BX2 and DCA-degrading strain Pseudomonas sp. LY-1, on biochar to remove TCC and its intermediates in TCC-contaminated soil. High-throughput sequencing and co-occurrence network analysis were employed to examine the microbial community structure and relationships in TCC-contaminated soil. The results showed that immobilized TC1 significantly increased the removal efficiency of TCC and accelerated its removal from contaminated soil. This research provides a promising strategy for the bioremediation of TCC in soil.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Engineering, Environmental
Abate Ayele, Arumuganainar Suresh, Solomon Benor, Rocktotpal Konwarh
Summary: Phycoremediation of heavy metals using indigenous microalga showed promising potential, with higher biosorption under acidic conditions. The interaction between pH and microalga concentration significantly affected the biosorption efficiency, achieving 91% Cr(VI) removal under optimized conditions.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Environmental Sciences
Mohamed Gomaa, Eman H. H. El-Naeb, Awatief F. F. Hifney, Mahmoud S. S. Adam, Mustafa A. A. Fawzy
Summary: This study used central composite design to investigate the effects of different phenol concentrations (200-1000 mg/L) towards Chlorella sp. under different culture conditions (light vs. dark) and NaNO3 concentrations (0-0.1 g/L). Phenol showed hormesis effects on the algal growth and cellular metabolites. Nitrate was crucial for promoting phenol uptake, while light was a limiting factor for growth and decreased the phyco-toxicity of phenol. Pigment contents increased to protect against oxidative stress. The addition of 200 mg/L phenol and 0.05 g/L NaNO3 significantly promoted biomass and lipid contents, while higher phenol concentrations increased protein and carbohydrate accumulation. This study highlights the effects of phenol on microalgae and the potential use of response surface methodology for growth monitoring and toxicity assessment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Elamathi Vimali, Arumugasamy Senthil Kumar, Nagamalai Sakthi Vignesh, Balasubramaniem Ashokkumar, Amarajothi Dhakshinamoorthy, Aswathy Udayan, Muthu Arumugam, Arivalagan Pugazhendhi, Perumal Varalakshmi
Summary: This study evaluated the biodiesel potential of indigenous microalgae Desmodesmus sp. VV2 and optimized the culture medium using Response Surface Methodology (RSM) to enhance lipid accumulation. The results showed that under optimized conditions, the microalgae exhibited significantly increased lipid and saturated fatty acid (SFA) content, with the highest total FAME content achieved. The quality of the biodiesel produced from the optimized culture medium also met international standards.
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)