Article
Environmental Sciences
Miao-Miao Lu, Feng Gao, Chen Li, Hong-Li Yang
Summary: This study evaluated the toxicity of Cr(VI) to microalgae Chlorella vulgaris and its removal by continuous microalgae cultivation in membrane photobioreactor (MPBR). The results showed that both SRT and HRT had significant effects on algal biomass production and pollutants removal. During continuous operation, MPBR achieved a maximum total Cr reduction of 50.0% at HRT of 3-day and SRT of 40-day, and a maximum volumetric removal rate of total Cr of 0.21 mg L-1 d(-1) at HRT of 2-day and SRT of 40-day.
Article
Green & Sustainable Science & Technology
Wai Hong Leong, Worapon Kiatkittipong, Man Kee Lam, Kuan Shiong Khoo, Pau Loke Show, Mardawani Mohamad, Siewhui Chong, Muslim Abdurrahman, Jun Wei Lim
Summary: The impact of different nitrogen sources on the microalga, Chlorella vulgaris, was studied, and the mechanisms of nitrogen transformation and valorization were unveiled. Balanced NH4+-N and NO3--N loadings could simultaneously achieve high nitrogen removal efficiency and microalgal biomass production, as well as suitable high lipid accumulation for biodiesel application.
Article
Biotechnology & Applied Microbiology
R. Nghiem Xuan, J. L. Mouget, V Turpin, P. Jaouen, J. Pruvost
Summary: The study found that culturing benthic diatom Haslea ostrearia in a conventional mixed PBR can overcome culture mass transfer limitation and increase photosynthesis-related kinetics by increasing dissolved inorganic carbon concentration and silica enrichment. Additionally, a fed-batch strategy on Si-P supply led to an increase in biomass productivity, while nutrient-limited conditions resulted in higher extracellular marennine productivity under different nutrient deprivations. The effect of light availability on biomass and extracellular marennine production kinetics was also investigated, showing a direct relation between Mean Rate of Photon Absorption and productivity levels.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Energy & Fuels
Asma Pourbakhtiar, Omid Tavakoli, Baharan Ahmadi
Summary: Applying microalgae is valuable for CO2 removal, wastewater treatment, and biofuel production. Optimizing microalgal cultivation conditions is crucial for increasing lipid productivity. A two-stage process using Chlorella vulgaris showed promising results for commercial biodiesel production by microalgae.
BIOENERGY RESEARCH
(2023)
Review
Environmental Sciences
Hoang Tam Nguyen, Yeomin Yoon, Huu Hao Ngo, Am Jang
Summary: This paper reviews the potential and mechanisms of microalgae-based systems for removing organic micropollutants, compares them with other treatment methods, and provides recommendations for future research.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Chemical
Luis Fernando Saldarriaga, Fernando Almenglo, Domingo Cantero, Martin Ramirez
Summary: The use of landfill leachate as a nutrient source can significantly improve CO2 absorption efficiency, but it may result in a lower pH, making CO2 uptake slightly more difficult.
Article
Chemistry, Medicinal
Philipp Doppler, Ricarda Kriechbaum, Maria Kaefer, Julian Kopp, Daniel Remias, Oliver Spadiut
Summary: A novel strain of Coelastrella terrestris was collected from red mucilage in a glacier foreland in Iceland. The addition of acetate increased the biomass productivity, indicating a promising approach for adonixanthin production.
Review
Biochemistry & Molecular Biology
Anand Baby Alias, Shubhanvit Mishra, Gaurav Pendharkar, Chi-Shuo Chen, Cheng-Hsien Liu, Yi-Ju Liu, Da-Jeng Yao
Summary: Microalgae are a significant source of renewable, sustainable and economical biofuels, with vast potential applications in energy, pharmaceutical and nutraceutical industries. The utilization of microfluidic technology plays a vital role in microalgal processes and applications in biofuels and biosensing.
Article
Agricultural Engineering
Thi-Thuy-Duong Nguyen, Xuan-Thanh Bui, Thanh-Tin Nguyen, Huu Hao Ngo, Kun Yi Andrew Lin, Chitsan Lin, Linh-Thy Le, Bao-Trong Dang, Manh-Ha Bui, Sunita Varjani
Summary: The study found that natural lighting conditions, while having slightly lower pollutant removal rates compared to artificial lighting, significantly reduced energy consumption, making it a sustainable option for wastewater treatment with microalgae-activated sludge co-culture system.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Kai-Xuan Huang, Ashiwin Vadiveloo, Jin-Long Zhou, Lei Yang, Dong-Zhi Chen, Feng Gao
Summary: Cultivating microalgae in wastewater is an environmentally sustainable approach, but commercial application is challenging due to low biomass output and high harvesting costs. Integrated culture and harvest systems, such as microalgae biofilm and membrane photobioreactor, have been explored to efficiently couple microalgal biomass production with wastewater purification. These systems allow for higher microalgae concentration and more efficient harvesting, improving biomass production and wastewater treatment efficiency.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Michael Sandmann, Sergiy Smetana, Volker Heinz, Sascha Rohn
Summary: This study compared two different photobioreactors and found that MUTL-PBR outperformed the traditional reactor in terms of biomass and antioxidant capacity, but its higher energy demand led to a greater environmental burden. MUTL-PBR shows potential for sustainable production of bioactive substances.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Joao Salazar, Anita Santana-Sanchez, Juha Nakkila, Sema Sirin, Yagut Allahverdiyeva
Summary: Agricultural wastewaters are a significant source of pollution in nature. This study used agricultural wastewaters from a commercial hydroponic greenhouse to cultivate the microalga Tetradesmus obliquus sp. NIVA-CHL107 and assess its bioremediation ability. The results showed high removal efficiency of nutrients, significant biomass production, and the presence of valuable compounds such as proteins, carbohydrates, and polyunsaturated fatty acids (PUFAs). The study highlights the potential of this microalga for wastewater treatment and multiple product generation in an algal biorefinery.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biotechnology & Applied Microbiology
Viyils Sangregorio-Soto, Claudia L. Garzon-Castro, Gianfranco Mazzanti
Summary: For microalgal cultures, using mathematical growth models to simulate production and determine the significance of input factors is crucial for optimal control and sustainability.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Fiddy S. Prasetiya, Martin Foret, Jean-Sebastien Deschenes, Romain Gastineau, Jean-Luc Mouget, Rejean Tremblay
Summary: The feasibility of culturing different species and strains of blue Haslea in photobioreactors was studied, focusing on sustained blue pigment production. Factors such as mixing, silicate concentration, and type of light were examined to maximize marennine or marennine-like pigment production. It was found that mixing negatively affected marennine production, while higher silicate concentrations and LED lights were more beneficial. Different Haslea species showed varying levels of pigment yields, with Haslea sp. having the lowest, and preservation of marennine was successful at low temperatures and without light. Further studies are needed to optimize production and reduce costs for industrial applications.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Engineering, Environmental
Malihe Barahoei, Mohammad Sadegh Hatamipour, Saeed Afsharzadeh
Summary: This study investigated the suitability of using Chlorella vulgaris for brackish water desalination, finding that modifying the culture medium resulted in enhanced microalgae growth and salt removal efficiency. The results suggest that Na+ ions are adsorbed on the Chlorella vulgaris cell surface, contributing to the desalination process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Biotechnology & Applied Microbiology
M. Castrillo, R. Diez-Montero, I. Tejero
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2018)
Article
Agricultural Engineering
M. Castrillo, L. M. Lucas-Salas, C. Rodriguez-Gil, D. Martinez
BIORESOURCE TECHNOLOGY
(2013)
Article
Environmental Sciences
Ruben Diez-Montero, Maria Castrillo, Marta Casao, Inaki Tejero
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Engineering, Environmental
M. Castrillo, R. Diez-Montero, A. L. Esteban-Garcia, I. Tejero
Article
Engineering, Environmental
Maria Castrillo, Alvaro Lopez Garcia
Article
Engineering, Environmental
Judith Sainz-Pardo Diaz, Maria Castrillo, Alvaro Lopez Garcia
Summary: Monitoring the concentration of pigments in water-bodies is crucial, but real-time measurement is currently not feasible. This study uses data-driven models and different learning approaches to estimate the concentration of pigments, with the federated learning approach showing better generalization ability.
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)