Article
Biotechnology & Applied Microbiology
A. Sanchez Zurano, C. Gomez Serrano, F. G. Acien-Fernandez, J. M. Fernandez-Sevilla, E. Molina-Grima
Summary: Photo-respirometric techniques are used to evaluate photosynthetic activity in phototrophic organisms. This study examined the impact of nitrate, ammonium, and phosphate availability on the photosynthesis and respiration of Scenedesmus almeriensis, finding both increasing until saturation and then diminishing, with inhibition at high concentrations. Various equations were used to model the data and determine nutrient yield coefficients, showing that nitrogen and phosphorous coefficients are not constant and can be affected by nutrient concentrations, including luxury uptake phenomena.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Martina Ciardi, Cintia Gomez-Serrano, Maria del Mar Morales-Amaral, Gabriel Acien, Tomas Lafarga, Jose Maria Fernandez-Sevilla
Summary: The study demonstrates that pig slurry can be used as an effective nutrient source for biomass production of Scenedesmus almeriensis, with a biomass productivity rate comparable to standard growth medium. Different dilutions of pig slurry did not significantly affect microalgal growth, while ozonation was effective in reducing the chemical oxygen demand concentration of the media.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Engineering, Environmental
Alireza A. Shahrivar, Dharmappa Hagare, Basant Maheshwari, Muhammad M. Rahman
Summary: The study found that using treated wastewater for irrigation did not have harmful effects on soil and plant nutritional properties. Wastewater treated by a membrane bioreactor (MBR) could provide a continuous supply of valuable nutrients to the grass, reducing the need for chemical fertilizers and mitigating the risk of water and groundwater contamination.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Martina Ciardi, Cintia Gomez-Serrano, Tomas Lafarga, Alicia Gonzalez-Cespedes, Gabriel Acien, Jose Gabriel Lopez-Segura, Jose Maria Fernandez-Seviila
Summary: This study assessed the potential of plastic covers to prevent or minimize water evaporation in open photobioreactors. The results showed that although covering the reactors reduced biomass productivity, it also significantly reduced water evaporation in different seasons. The use of inexpensive commercial plastics as covers can greatly decrease the water requirements of the system.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Amit Dan Grossman, Yonas Zeslase Belete, Sammy Boussiba, Uri Yogev, Clemens Posten, Franziska Ortiz Tena, Laurenz Thomsen, Song Wang, Amit Gross, Stefan Leu, Roy Bernstein
Summary: The study developed a near-zero waste treatment system for food processing wastewater, utilizing AnMBR and photobioreactor for microalgae cultivation, achieving effective recovery and utilization of waste. The research found variations in microalgal biomass and nitrogen-phosphorus uptake in wastewater among seasons, but overall, the treatment system was efficient, meeting irrigation water standards.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Evan Heronemus, Kasuni H. H. Gamage, Ganga M. Hettiarachchi, Prathap Parameswaran
Summary: Anaerobic membrane bioreactors (AnMBRs) have the potential to recover water, energy, and nutrients from concentrated wastewaters. This study aimed to optimize iron phosphate recovery through a tertiary coagulation process and characterize the recovered nutrient product (RNP) for plant uptake. The addition of a coagulant aid was found to enhance phosphorus removal and increase settleability in AnMBRs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Plant Sciences
Yuhang Zhang, Baohui Liu, Fanjiang Kong, Liyu Chen
Summary: Nutrition is a crucial factor in the growth and development of plants, particularly in terms of flowering. The process of flowering represents a transition from vegetative to reproductive stages, which requires nutrient consumption. Furthermore, nutrients such as nitrate act as signals that impact flowering. This review aims to enhance our understanding of how plant nutrition influences flowering by examining the relationships between nutrients (primarily nitrogen, phosphorus, and potassium) and the flowering process.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Fisheries
Mariana Holanda, Camila Besold, Ferran Llario Sempere, Paulo Cesar Abreu, Luis Poersch
Summary: The study aimed to evaluate the growth of Arthrospira platensis in the effluent of Pacific white shrimp Litopenaues vannamei grown in biofloc systems. Results showed that the cultivation of A. platensis can effectively reduce nitrogen and phosphate loads in the effluent of L. vannamei raised in biofloc systems.
JOURNAL OF THE WORLD AQUACULTURE SOCIETY
(2022)
Article
Environmental Sciences
S. Ibeid, M. Elektorowicz
Summary: The study found that the submerged membrane electro-bioreactor had high removal efficiency of ammonium and nitrate at low carbon concentrations, outperforming the membrane bioreactor. The system showed the capability to remove nitrogen components regardless of carbon/nitrogen ratio.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Microbiology
Pengchong Wang, Yahui Shao, Yun Geng, Rubina Mushtaq, Wenlong Yang, Mei Li, Xiuqin Sun, Hongbo Wang, Gao Chen
Summary: Secondary effluents contain high levels of nitrogen and phosphorous, which can cause eutrophication if not treated. Microalgae have been found to effectively remove these nutrients and pollutants from wastewater, making them suitable for secondary effluent treatment.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Biodiversity Conservation
Nolan J. T. Pearce, Isabelle Lavoie, Kathryn E. Thomas, Patricia A. Chambers, Adam G. Yates
Summary: This study investigated how stream communities respond to cumulative human impacts such as nutrient enrichment, showing that the effects of nutrient enrichment are conditional on upstream ecosystem conditions. Future assessments may need to consider the complexities related to environmental stressors when evaluating the impacts of human activities on stream ecosystems.
ECOLOGICAL INDICATORS
(2021)
Article
Agronomy
J. Cedeno, J. J. Magan, R. B. Thompson, M. D. Fernandez, M. Gallardo
Summary: Substrate-grown crops in southern Spain make up 10% of intensive greenhouse horticulture, and their free-draining nature leads to significant nutrient loss in drainage, causing water contamination. This study examined two management approaches, ratio-based and uptake concentration-based, to reduce nutrient loss in drainage. Both strategies significantly reduced nutrient application, with ratio-based management reducing nutrient loss by 58-77% and uptake concentration-based management reducing it by 65-80%.
AGRICULTURAL WATER MANAGEMENT
(2023)
Article
Biodiversity Conservation
Sandra Poikane, Gabor Varbiro, Martyn G. Kelly, Sebastian Birk, Geoff Phillips
Summary: The study finds significant variation in the methods used by European countries to set river nutrient thresholds, with some countries relying on expert judgement or statistical distribution, while others prefer statistical relationships based on biological variables. For the first time, an ecology-based approach is used to derive nutrient thresholds for various river types in Central Europe. The results demonstrate that adopting ecology-based nutrient targets could improve sustainable river management where nutrients are the main pressure preventing the achievement of good ecological status.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Xin Liu, Dingming Zhang, Huijun Wu, James J. Elser, Zengwei Yuan
Summary: Over the past 15 years in China, there has been excessive input of nitrogen and phosphorus, resulting in a significant decrease in the nitrogen to phosphorus ratio. While nitrogen use efficiency has increased, most crops have shown a decreasing trend in phosphorus use efficiency. This highlights the need for further exploration in phosphorus management for sustainable agriculture.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biochemistry & Molecular Biology
Yi Ding, Shiyuan Wang, Hang Ma, Binyu Ma, Zhansheng Guo, Hong You, Junxue Mei, Xuguang Hou, Zhenlin Liang, Zhipeng Li
Summary: The study on the nutrient removal and biomass production of the internal circulating fluidized bed microalgae membrane bioreactor (ICFB-MMBR) showed that in the mixotrophy culture mode and with increased influent TOC, there was an improvement in the growth of Platymonas helgolandica tsingtaoensis and removal efficiency of pollutants. Additionally, the best growth rate and nutrient removal efficiencies were observed at influent pH of 8 for P. helgolandica tsingtaoensis.
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)