Article
Agricultural Engineering
Mingxiang Qv, Dian Dai, Dongyang Liu, Qirui Wu, Chunming Tang, Shuangxi Li, Liandong Zhu
Summary: In this study, a microalgae-bacteria symbiosis (ABS) system was developed for pollutants removal by co-culturing Chlorella sorokiniana with activated sludge, and the interaction mechanism was investigated. The ABS system achieved almost complete removal of ammonia nitrogen, with removal efficiencies of 65.3% for total nitrogen and 42.6% for total phosphorus. Brevundimonas greatly promoted microalgal biomass growth and microalgae contributed to the increase in the abundance of Dokdonella and Thermomonas, facilitating nitrogen removal. The study also identified key extracellular polymeric substances for the formation of flocs by microalgae and activated sludge.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Nico Lambert, Pieter Van Aken, Ilse Smets, Lise Appels, Raf Dewil
Summary: The integration of ultrasonic sludge disintegration in a conventional biological wastewater treatment plant has been found to reduce sludge production and improve the biodegradability of sludge. Ultrasonic treatment also improves sludge settling characteristics and leads to improved effluent quality.
CHEMICAL ENGINEERING JOURNAL
(2022)
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
Ankit Agarwalla, Sanjeev Mishra, Kaustubha Mohanty
Summary: This study investigates the suitability of using powdered activated carbon (PAC) treated effluent based culture (EBC) media for cultivating Monoraphidium sp. KMC4. The results show that EBC media treated with 30 mg L-1 PAC significantly enhances biomass yield and achieves good growth and water-saving effects in the recyclability study.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Wai Hong Leong, Jun Wei Lim, Man Kee Lam, Sze Mun Lam, Jin Chung Sin, Abby Samson
Summary: The novel SFB-AlgalBac photobioreactor was found to perform optimally at an influent flow rate of 5.0 L/d, achieving the highest microalgal nitrogen assimilation rate and biomass productivity. Increasing the flow rate to 10.0 L/d reduced the reactor's performance and resulted in differences in microalgal biomass per unit of nitrogen assimilated between the two flow rates. Additionally, prior influent treatment by activated sludge improved microalgal biomass settleability by releasing extracellular polymeric substances.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Environmental Sciences
Lei Wang, Zhijun Luo, Yongxiang Hong, Pamela Chelme-Ayala, Lingjun Meng, Zhiren Wu, Mohamed Gamal El-Din
Summary: In this study, an efficient strategy, interior microelectrolysis-Fenton-recycle ferrite (IM-Fenton-RF), was developed for treatment of electroplating wastewater containing chelated copper. Under optimal conditions, 99.9% copper removal was achieved with stable ferrite sludge. The ferrite sludge has advantages over traditional metal hydroxides sludge and can be recycled for further utilization.
Article
Environmental Sciences
Guixing Xiao, Jianqiu Chen, Pau Loke Show, Qiulian Yang, Jian Ke, Qi Zhao, Ruixin Guo, Yanhua Liu
Summary: This study demonstrates the potential of multiple microalgae species in antibiotic wastewater treatment. Co-cultivation of different microalgae can significantly enhance the removal efficiency of antibiotics in wastewater.
Article
Engineering, Environmental
Kasim Mohammed, S. Z. Ahammad, P. J. Sallis, C. R. Mota
Summary: Engineered microalgae-bacteria systems have the potential to be energy-efficient and carbon-neutral wastewater treatment technologies. The development of a hybrid microalgae-activated sludge (HMAS) system coupled carbon capture with domestic wastewater treatment, resulting in significant reduction in operational cost and efficient removal of SCOD and met bacterial oxygen requirement.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhanyao Li, Guifang Chen, Huiru Ma, Fuyu Huang, Hao Xu, Liqiang Zhang, Xueliang Yuan, Xinyan Zhang, Shouyan Chen, Ping Zhou
Summary: Powdered activated coke has potential in wastewater treatment due to its good adsorption performance and low cost. However, its regeneration is difficult due to saturation, limiting its wider application. Hydrothermal regeneration in water treatment is a suitable solution as it does not require pre-drying and has minimal mass loss.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Mohammadreza Kamali, Tejraj M. Aminabhavi, Luis A. C. Tarelho, Rens Hellemans, Joren Cuypers, Isabel Capela, Maria Elisabete V. Costa, Raf Dewil, Lise Appels
Summary: The study showed that acclimatization of activated sludge with pinewood biochar significantly enhanced the biodegradation rate of phenol. The presence of biochar led to increased specific biodegradation rates and improved microbial colonization and growth, demonstrating the positive effects of biochar in the treatment of synthetic effluents.
CHEMICAL ENGINEERING JOURNAL
(2022)
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
Guanying Wang, Guanglei Qiu, Jian Wei, Zhuang Guo, Weiye Wang, Xiaoling Liu, Yonghui Song
Summary: With the development of industries, explosion accidents occur frequently during production, transportation, usage, and storage of hazardous chemicals. The activated carbon-activated sludge (AC-AS) process shows promising potential in efficiently treating wastewater with high concentrations of toxic compounds. In this study, AC and AS were used to treat wastewater from an explosion accident, resulting in increased removal efficiency and shortened treatment time compared to traditional processes. Metagenomic analysis and spectroscopy were used to explore the enhancement mechanism of AC on AS, revealing the important roles of certain bacteria and genes in pollutant degradation. This study demonstrates the universal characteristics of the AC-AS process for treating wastewater with high levels of organic matter and toxicity.
ENVIRONMENTAL RESEARCH
(2023)
Review
Environmental Sciences
Matia Mainardis, Marco Buttazzoni, Mattia Cottes, Alessandro Moretti, Daniele Goi
Summary: Respirometry tests are widely used in the field of wastewater treatment to characterize wastewater streams, assess toxic/inhibitory effects on biomass, and calibrate mathematical models. This method allows for the fractionation of chemical oxygen demand (COD), provides information on biomass kinetics and stoichiometry, and is useful for promptly assessing toxic effects in wastewater treatment plants. Respirometry has also been applied to innovative areas such as moving-bed bio-reactors, fungi, and microalgae, showing potential for natural remediation methods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Adil Ashraf, Racchana Ramamurthy, Sarah Moreno Sayavedra, Pankaj Bhatt, Saurabh Gangola, Tayyaba Noor, Miguel Desmarais, Alija Rabbani, Eldon R. Rene
Summary: The integration of a photobioreactor (PBR) with ASP treatment for sidestream digestate is economically feasible and effective in enhancing nitrogen removal. The symbiotic relationship between microalgae and heterotrophic bacteria reduces greenhouse gas emissions and energy costs in wastewater treatment.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Biochemistry & Molecular Biology
Xiao-Man Sun, Lu-Jing Ren, Quan-Yu Zhao, Xiao-Jun Ji, He Huang
BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR AND CELL BIOLOGY OF LIPIDS
(2019)
Article
Environmental Sciences
Dujia Cheng, Xuyang Li, Yizhong Yuan, Chengyu Yang, Tao Tang, Quanyu Zhao, Yuhan Sun
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Review
Biotechnology & Applied Microbiology
Yu-Ting Zhang, Jia-Yi Jiang, Tian-Qiong Shi, Xiao-Man Sun, Quan-Yu Zhao, He Huang, Lu-Jing Ren
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2019)
Review
Environmental Sciences
Han Li, Quanyu Zhao, He Huang
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Agricultural Engineering
Dengjin Li, Yizhong Yuan, Dujia Cheng, Quanyu Zhao
BIORESOURCE TECHNOLOGY
(2019)
Article
Biochemistry & Molecular Biology
Dujia Cheng, Xuyang Li, Yizhong Yuan, Quanyu Zhao
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2020)
Article
Agricultural Engineering
Lujing Ren, Xiaoman Sun, Lihui Zhang, He Huang, Quanyu Zhao
BIORESOURCE TECHNOLOGY
(2020)
Review
Agricultural Engineering
Xiao-Man Sun, Lu-Jing Ren, Quan-Yu Zhao, Li-Hui Zhang, He Huang
BIORESOURCE TECHNOLOGY
(2019)
Article
Biotechnology & Applied Microbiology
Lujing Ren, Xiaoman Sun, Lihui Zhang, Quanyu Zhao, He Huang
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2020)
Review
Biotechnology & Applied Microbiology
Yan Xia, Yu-Ting Zhang, Jin-Yuan Sun, He Huang, Quanyu Zhao, Lu-Jing Ren
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2020)
Article
Biochemistry & Molecular Biology
Yali Zhu, Xueqing Zhong, Yujiao Wang, Quanyu Zhao, He Huang
Summary: Ionic liquids are widely used for lipid and pigment extractions from microalgae, but their discharge into environments may pose potential risks. Evaluating the growth performance and antioxidative response of microalgae to ionic liquids can help understand stress regulation mechanisms and investigate environmental risks. Different types of ionic liquids have varying effects on the growth and oxidative stress responses of microalgae, with high concentrations leading to reductions in chlorophyll content, increases in ROS levels and malondialdehyde contents, as well as enhanced activities of superoxide dismutase in the microalgae.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2021)
Article
Environmental Sciences
Xueqing Zhong, Yali Zhu, Yujiao Wang, Quanyu Zhao, He Huang
Summary: Antibiotics are essential for treating bacterial infections and play important roles in aquaculture and animal husbandry, but the accumulation of antibiotics in water and soil poses global environmental risks due to excessive consumption and inadequate wastewater treatment. Toxicity studies on spiramycin, tigecycline, and amoxicillin towards Chlorella pyrenoidesa and Anabaena cylindrica reveal that the latter is more sensitive, with spiramycin and tigecycline exhibiting higher toxicity compared to amoxicillin. This research helps in assessing the ecological risks of these antibiotics on green microalgae and cyanobacteria.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Biotechnology & Applied Microbiology
Xuechao Hu, Xiuyang Tang, Zhiqian Bi, Quanyu Zhao, Lujing Ren
Summary: Adaptive laboratory evolution was conducted on Schizochytrium sp. to enhance strain thermotolerance and docosahexaeonic acid (DHA) production, resulting in higher growth rate and lower temperature sensitivity of the adaptive strain. This work successfully increased fermentation temperature by 5 degrees without affecting DHA production, reducing industrial energy consumption cost significantly.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Biotechnology & Applied Microbiology
Yanli Man, Yuting Zhang, Jiayi Jiang, Quanyu Zhao, Lujing Ren
Summary: This study compared four different dehydratase (DH) domains from different strains and analyzed their expression in Escherichia coli. The results showed that DH1,2 could enhance the percentage of unsaturated fatty acids, while DH3 benefited for saturated fatty acid biosynthesis. Additionally, DH from different gene clusters do have specific substrate preference.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Environmental Sciences
Xueqing Zhong, Xiangxiang Zhang, Tianyi Zhou, Guangping Lv, Quanyu Zhao
Summary: The accumulation of antibiotics in wastewater poses a threat to human health, but microalgae have shown promise in removing antibiotics. This study evaluated the removal kinetics of Tigecycline (TGC) by Chlorella pyrenoidosa under different conditions and identified the main mechanisms for its removal. The results showed that microalgae can effectively remove TGC, especially at higher initial dry cell density and lower TGC per g dry cell weight ratio.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
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)