Article
Green & Sustainable Science & Technology
Nicolaus N. N. Mahasti, Jui-Yen Lin, Yu-Jen Huang, Jun-Yi Wu, Ming-Chun Yen, Yu -Hsiang Chiu, Yao-Hui Huang
Summary: Chemical oxo-precipitation (COP) is a facile method to remove boron by precipitating perborate salts using hydrogen peroxide. This study improves the COP method by using calcium precipitant (Ca-COP) to achieve comparable boron removal without generating hazardous waste. The formation of calcium carbonate and calcium peroxide, together with the precipitation of calcium perborate, play decisive roles in the Ca-COP process. A multistage Ca-COP process is developed to prevent incongruent dissolution and enhance sorptive removal, effectively reducing boron levels from 1000 to 5 mg-B/L.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Multidisciplinary
Vhahangwele Masindi, Spyros Foteinis, Phil Renforth, Efthalia Chatzisymeon
Summary: Wastewater treatment, known for its high carbon footprint, can also be an innovative approach for carbon dioxide removal. In this study, the effluent from a phosphorus recovery system was used to mineralize carbon dioxide into stable carbonate minerals. The results suggest that this wastewater treatment method can greatly reduce the carbon footprint and improve water quality.
Article
Agricultural Engineering
Huichao Zhang, Xin Li, Zhongyi An, Zhiwei Liu, Chunxiao Tang, Xiaodong Zhao
Summary: This study evaluated the feasibility of using RAB reactors to treat PAM-contaminated wastewater, and found that the presence of external nitrogen sources had a significant impact on treatment efficiency. High-throughput sequencing and infrared spectroscopy analysis showed that biofilms in RAB reactors can effectively degrade PAM.
BIORESOURCE TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Xiedong Ren, Yuan Lu, Qiang Wei, Liusi Yu, Kaiyuan Zhai, Jiayi Tang, Hu Wang, Juan Xie
Summary: The influence of Ca2+ on the growth mechanism of CO2 corrosion products was explored through weight loss, in situ electrochemical measurements, and analysis of corrosion products. The increase in Ca2+ concentration in the solution weakened the crystallinity of the product film, FexCa(1-x)CO(3), gradually transforming it into an amorphous structure. This resulted in reduced protectiveness and an elevated corrosion rate. Higher concentrations of Ca2+ led to unstable growth of FexCa1-_xCO3. At 10000 mg L-1 Ca2+, complex FexCa1_xCO(3) structures with varying Ca content were formed. A linear relation between Ca2+ concentration in the solution and the molar fraction of Ca in the film was also proposed.
Review
Environmental Sciences
Prateek Gururani, Pooja Bhatnagar, Vinod Kumar, Mikhail S. Vlaskin, Anatoly Grigorenko
Summary: Urbanization, industrialization and other human-related activities contribute to the discharge of toxic substances into the environment. The use of algae in wastewater treatment has been widely studied and it has been found that algae consortium systems are more effective than monocultures. Microorganisms such as bacteria or fungi in wastewater can form symbiotic relationships with algae, aiding in the removal of pollutants. This review explores the symbiotic relationships between algae and other microorganisms and their applications in wastewater treatment.
Article
Environmental Sciences
Yanhui Hu, Weijian Gu, Huimin Hu, Xuewei Li, Qiwu Zhang
Summary: The presence of various conventional and emerging contaminants has made wastewater treatment increasingly difficult and expensive globally. In this study, a composite material of zero-valent iron (ZVI) and calcium carbonate (CaCO3) was used to achieve a synergistic effect in treating multiple pollutants. The activation mechanism of the ball milling process and the removal performance of the prepared composites were examined using various analytical methods. The results showed that the composite samples exhibited extremely high removal capacity for a variety of pollutants. Azo dyes were decolorized through the breaking of nitrogen and nitrogen double bonds, while inorganic pollutants were removed through efficient heavy metal ion precipitation and co-precipitation of phosphate and fluoride ions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Xinning Gao, Lixin Zhao, Ruiling Zhang, Shuo Wang, Yanli Pan, Songyan Qin
Summary: Clogging in the Biological Aerobic Filter(BAF) reduces its treatment capacity. Identifying the cause of clogging is crucial for maintaining normal treatment in BAF. In a petrochemical wastewater treatment plant, two identical BAFs exhibited different clogging situations, with Pre-BAF clogged with slurry and Posterior-BAF clogged with medium hardening. Analysis revealed that organic content is the main reason for the clogging difference, affecting scale composition and the perfectness of calcite crystals in Posterior-BAF.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Luong N. Nguyen, Lisa Aditya, Hang P. Vu, Abu Hasan Johir, Lucia Bennar, Peter Ralph, Ngoc B. Hoang, Jakub Zdarta, Long D. Nghiem
Summary: Algae cultivation for wastewater treatment is gaining more attention due to its ability to recover nutrients and capture CO2 in the circular economy concept. However, there are technical and economic challenges in implementing algae-based wastewater treatment due to the complexity of wastewater and algal ecological characteristics. The use of phototrophic algae in this process faces challenges in supplying CO2 and illumination. Future research should focus on improving algae growth rate, environmental tolerance, and downstream processing, as well as analyzing biomass for carbon credit assessment and economic values.
CURRENT POLLUTION REPORTS
(2022)
Article
Environmental Sciences
Mustafa Rakib, Yeshaswini Baddam, Balakrishnan Subeshan, Ayse B. Sengul, Eylem Asmatulu
Summary: The lack of safe drinking water is a major problem in many areas of the world due to climate change, population growth, and unsustainable water usage. Research focusing on water quality, pollution, and control is needed to manage unexpected changes in water sources. This study assesses the effectiveness of algae-based activated carbons and develops a low-cost sustainable process for wastewater treatment. The results showed that algae-based carbon with CaCl2 activation provided a better surface area and cumulative pore volume. The filtration process using algae-based activated carbon shows promise for water treatment with further improvement and modifications.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Petroleum
C. E. T. da Silva, L. L. de O. Soares, L. G. Pereira, A. A. Cavalcante, A. R. A. Achy, V. L. Filardi, V. P. Ferreira, R. A. Fiuza Junior, B. B. Castro, T. F. Paes, I. M. Pepe
Summary: This study presents a new device for preventing calcium carbonate scaling in oil and gas production units. The device utilizes three cells with five ultrasonic transducers each to reduce carbonate scaling in pipelines. Long-term tests were conducted in a semi-industrial hydraulic system, simulating CaCO3 production. The results showed significant reductions in pressure drop and scale thickness, attributed to changes in particle size and geometry.
Article
Environmental Sciences
Ania Morvannou, Matthieu Masson, Mathieu Gautier, Sara Bisone, Loic Richard, Catherine Boutin, Nicolas Forquet
Summary: This study investigates the fate of phosphorus in soil-based constructed wetlands in France and its assimilation by Phragmites australis. The results show satisfactory phosphorus retention in the three different soils studied. The study also finds that a significant amount of phosphorus can be exported through the harvesting of Phragmites australis aerial parts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Kyung Jin Min, Doo Young Oh, Ki Young Park
Summary: In this study, field experiments were conducted in an open pond in Myanmar to analyze the nutrient removal efficiency and productivity of Hydrodictyon reticulatum (H. reticulatum), as well as determine the maximum fermentation limit concentration for bioethanol production. The study found that excessive light intensity in the tropical region caused photoinhibition, reducing facility efficiency in the absence of shade. Transparent film shading was more effective than translucent film, maintaining high nitrogen and phosphorus removal efficiencies and H. reticulatum productivity. The study also observed that algae biomass production increased with an increasing supply of nitrogen and phosphorous in a shaded raceway open pond facility.
Article
Environmental Sciences
Rodrigo Tomazetto De Carvalho, Camila Huebner Costabile Wendt, Maria Julia Willemes, Ricardo da Gama Bahia, Marcos Farina, Leonardo Tavares Salgado
Summary: This study aimed to describe the early steps of Lithophyllum corallinae development and its calcification process. The results showed that mineralization of cell walls began at the third spore cell division, while the outermost part of the germinating spore lacked calcification. This finding is important for future research on coralline algae calcification, particularly in testing climate change scenarios.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Tianwen Song, Shanshan Li, Zichao Yin, Mutai Bao, Jinren Lu, Yang Li
Summary: This study investigates the treatment of HPAM-containing wastewater using an ozonic-anaerobic-aerobic multistage treatment process. The results show that the process has ideal degradation performance and key microorganisms essential for the treatment.
ENVIRONMENTAL POLLUTION
(2021)
Review
Environmental Sciences
Seyedeh Fatemeh Mohsenpour, Sebastian Hennige, Nicholas Willoughby, Adebayo Adeloye, Tony Gutierrez
Summary: This review focuses on the application of mixotrophic microalgae in wastewater treatment, highlighting their mechanisms in reducing nitrogen, phosphorus,and COD, as well as factors influencing their effectiveness and bioreactor design.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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)