Article
Environmental Sciences
Dongbo Liang, Wei Guo, Dongyue Li, Fan Ding, Peilin Li, Zhaoming Zheng, Jun Li
Summary: The study found that adding carriers in AN/O/AX_SBR can shorten the maturation period of AGS and improve its physical strength. The technology can simultaneously achieve nitrification, endogenous denitrification, and phosphorus removal, with removal efficiencies of total nitrogen and total phosphorus above 70% and 80%, respectively.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Yu Jin, Wei Xiong, Nan Zhou, Gang Xiao, Shaojie Wang, Haijia Su
Summary: The structure of bacterial community in seed sludge varies greatly from different sources, influencing the characteristics of sludge. This study investigated the role of different functional bacteria in AGS granulation and pollutant degradation using seed sludge obtained from different sources. Results showed that the initial bacterial community significantly affected AGS formation and pollutants removal, with seed sludge from municipal sludge granulating faster and achieving better settling performance and granulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Sadiye Kosar, Onur Isik, Yasemin Akdag, Hazal Gulhan, Ismail Koyuncu, Hale Ozgun, Mustafa Evren Ersahin
Summary: Characteristics of seed sludge are crucial for the granulation and treatment performance of aerobic granular sludge process. Different types of seed sludge can affect the size of granules and the efficiency of nitrogen and phosphorus removal in the sludge.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biochemistry & Molecular Biology
Zhaohui An, Xueyao Zhang, Yi Zheng, Zhi-Wu Wang
Summary: This study showed that successful protist granulation can be induced by introducing famine conditions, extending cycle time, lowering substrate concentration, and maintaining a selective settling velocity. The resulting protist granules had spherical shape and smooth surface, with an average particle size of 728 μm, 90 times greater than their planktonic counterparts.
PROCESS BIOCHEMISTRY
(2021)
Review
Biotechnology & Applied Microbiology
Jin-Lei Yan, You-Wei Cui, Ji-Lin Huang
Summary: This review highlights the importance of efficient start-up, cultivation, and maintenance of aerobic granular sludge (AGS) in continuous flow reactors for its full-scale application in wastewater treatment plants. Significant progress has been made in recent decades in the configuration of CFR for in-situ granulation of aerobic sludge. The innovation of continuous flow configuration is essential for the future application of AGS in mainstream WWTPs.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Agricultural Engineering
Qiulai He, Zhiyi Xie, Zhidong Fu, Meng Wang, Peng Xu, Jian Yu, Jingwei Ma, Shuxian Gao, Li Chen, Wei Zhang, Jianyang Song, Hongyu Wang
Summary: This study compared the tolerance ability of incomplete and complete granulation sludge to oxytetracycline (OTC), finding that incomplete granulation sludge showed better denitrification performance and resistance, while complete granulation sludge suffered a permanent collapse under high OTC concentrations.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yan-Ru Jia, Zheng-Hong Wen, Yi-Jiang Shang-Guan, Zhi-Hua Li
Summary: A novel method was investigated for cultivating granular sludge in an oxidation ditch by recycling the residual sludge after extracting slime-extracellular polymer substances (slime-EPS). The bioactivities of the residual sludge slightly decreased compared to the raw sludge. Returning the slime-EPS extracted sludge to the continuous flow reactors showed promising results for aerobic granulation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Engineering, Environmental
Dong Xu, Jun Li, Jun Liu, Xinghong Qu, Hailing Ma
Summary: Aerobic granule in continuous-flow process has attracted global interest in the field of biological wastewater treatment, with advancements made in the treatment of complex pollutants, reactor configurations, and granule stability. This review discusses the challenges and prospects of applying this technology at full scale, aiming to contribute to the dissemination of practical applications.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Tulay Yilmaz, Emir Kasim Demir, Gulfem Asik, Senem Teksoy Basaran, Emine Ubay Cokgor, Seval Sozen, Erkan Sahinkaya
Summary: This study investigated the impact of different sludge retention times (SRTs) on the wastewater treatment performance of an aerobic membrane bioreactor (MBR) using real textile industry wastewater. Two laboratory-scale membrane bioreactors were operated in parallel, with SRTs of 30 d and 20 d, and 10 d, respectively. The results showed that the COD removal efficiency remained above 90% in all SRTs, while the color removal efficiency decreased as SRT decreased. The study also found that a decrease in SRT resulted in changes in membrane filtration performance and molecular weight distribution of organic substances in the permeate.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Engineering, Environmental
Xushen Han, Yan Jin, Jianguo Yu
Summary: This review summarizes the main strategies for accelerating the formation of aerobic granular sludge (AGS) and focuses on the bioaugmentation technology. The bioaugmentation technology is divided into two categories: flocculating bacteria and filamentous fungus, which includes pure fungal pellets and pellet-bacteria system. The review also discusses the adsorption of various microorganisms by pure-culture fungal pellets in long-term operation. A comparison analysis of different bioaugmentation technologies for rapid AGS cultivation is provided, along with prospects for future research.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Environmental Sciences
Chunli Wan, Liya Fu, Zhengwen Li, Xiang Liu, Lin Lin, Changyong Wu
Summary: This paper comprehensively reviews the research on AGS over the past two decades, including culture conditions, granulation mechanisms, metabolic and structural stability, storage, and diverse applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Ece Sagir Kurt, Ezgi Atli, Safak Basa, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: This study investigated the impact of settling prior to the aerobic granular sludge (AGS) process on granulation and treatment performance. The results showed that granulation was achieved in both stages, with over 92% COD removal efficiency in each stage. However, settling prior to the AGS process led to a decrease in nitrogen and phosphorus removal efficiencies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Antonio Ricardo Mendes Barros, Clara de Amorim de Carvalho, Paulo Igor Milen Firmino, Andre Bezerra dos Santos
Summary: The addition of calcium had a significant effect on granulation, particularly in conventional SBRs where larger granules formed in a shorter period of time due to higher EPS production. While the removal of carbon, nitrogen, and phosphorus was not affected, the addition of calcium influenced granulation time, settleability characteristics, size, and granule composition.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Zengrui Pan, Chong Qiu, Qianjin Yang, Hongtang Wei, Jinbo Pan, Jianlong Sheng, Jun Li
Summary: In this study, a pilot-scale two-stage SBRs with added waste iron shavings was established to cultivate aerobic granular sludge for real wastewater treatment. The results showed successful cultivation of aerobic granular sludge with satisfactory treatment performance, achieving effective removal of COD, TP, NH4+-N, TN, and SS in the wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Rui Tang, Xushen Han, Yan Jin, Jianguo Yu
Summary: This study explored the granulation process of SAGS under different OLR conditions in hypersaline wastewater. Increasing OLR can accelerate the formation of AGS, but excessive OLR may lead to unstable granules.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Bin Ji, Lin Zhu, Shulian Wang, Yu Liu
Summary: The study found that high temperatures favored organic removal, with most of the ammonia-N being removed through microbial assimilation by microalgae and bacteria, and high efficiency of phosphorus removal. The contributions of microalgal and bacterial assimilations towards COD, ammonia and P removal appeared to be temperature-dependent.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Agricultural Engineering
Meng Zhang, Bin Ji, Shulian Wang, Jun Gu, Yu Liu
Summary: This study found a strong correlation between extracellular polymeric substances of microalgal-bacterial granules and the granule size. The granule size had a positive effect on the removal of specific organics in wastewater, but a negative effect on ammonium and phosphorus removal. Granule size can be used as an indicator to reflect the synergistic interactions between microalgae and bacteria in microalgal-bacterial granules.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Siyu Wang, Hang Liu, Jun Gu, Meng Zhang, Yu Liu
Summary: An integrated AnfMBR-RO-chlorination process was developed to address the drawbacks of excessive sludge generation and high energy consumption in municipal wastewater reclamation. The process showed high removal rates of COD, phosphate, and NH4+-N, and significantly reduced energy consumption and greenhouse gas emissions compared to current methods, bringing municipal wastewater reclamation closer to carbon neutrality and water sustainability.
Article
Environmental Sciences
Zhen Gao, Yingqun Ma, Yu Liu, Qunhui Wang
Summary: This study developed a co-fermentation strategy using waste cooking oil (WCO) and food waste for microbial lipid production. It was found that adjusting the pH values within a certain range could increase lipid production efficiency. The produced lipid could potentially be used for biodiesel production, leading to significant reductions in CO2 and SO2 emissions from global food waste.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Jun Zhang, Yi-ping Wan, Ze-hua Liu, Hao Wang, Zhi Dang, Yu Liu
Summary: The stability of C-NEs in aqueous environmental samples is influenced by different storage conditions, with low temperature of 4 degrees C leading to easy deconjugation, while pH of 3 and addition of HgCl2 can keep C-NEs intact at room temperature. Addition of HgCl2 is more convenient and practical for 24-h composite sampling.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Jun Zhang, Shu-shu Zhong, Ke-meng Zhao, Ze-hua Liu, Zhi Dang, Yu Liu
Summary: Sulfite can effectively inhibit arylsulfatase, potentially disrupting estrogen homeostasis in humans, which requires further investigation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Zhao Tang, Yi-Ping Wan, Ze-Hua Liu, Hao Wang, Zhi Dang, Yu Liu
Summary: This study reveals the presence of eight less-studied natural estrogens in the urine of swine and cattle, showing that these estrogens are widely distributed and vary in frequency among different livestock.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Meng Zhang, Jun Gu, Siyu Wang, Yu Liu
Summary: Novel sandwich-structured carriers were developed for fast immobilization of anammox sludge, establishing a fixed film membrane bioreactor for municipal wastewater treatment. Results showed rapid start-up of the reactor without lag phase, with high nitrogen removal efficiency and low membrane fouling. The activity of anammox sludge stabilized in the carriers, enriching Candidatus Kuenenia as the dominant anammox bacteria for promising alternative in mainstream anammox process.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Zhao Tang, Ze-hua Liu, Wu Chen, Chen Wang, Ya-jiang Wu, Hao Wang, Zhi Dang, Yu Liu
Summary: This study reports the presence of twelve natural estrogens (NEs) in the urine of endangered mammals in a Zoo Park in Guangzhou, with different species showing varying concentrations of NEs. The findings indicate that zoo animals' urine can be an emerging source of NEs and should be considered for further investigation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Xiaoyuan Zhang, Jun Gu, Yu Liu
Summary: With the growing challenges of global climate change and water shortage, an innovative wastewater reclamation technology has been developed to achieve energy and carbon neutrality. The technology combines anaerobic membrane bioreactor (AnMBR) and biochar adsorption-reverse osmosis (RO) processes, resulting in efficient municipal wastewater reclamation with reduced energy consumption and carbon emissions.
Review
Agricultural Engineering
Xiaoyuan Zhang, Yu Liu
Summary: This article discusses the challenges faced by the conventional activated sludge process in the face of accelerating global climate change and explores potential wastewater treatment technologies and pathways towards achieving carbon neutrality.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Yuting Shi, Bin Ji, Xiaoyuan Zhang, Yu Liu
Summary: The microalgal-bacterial granular sludge (MBGS) process, as a new green wastewater treatment technology, was evaluated for its performance in treating municipal wastewater under outdoor conditions. The study discovered the auto-floating phenomenon and its causes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yi-Kun Geng, Jun Gu, Xiaoyuan Zhang, Zhuan Khai Lim, Yishuai Jiang, Meng Zhang, Yan Zhou, Yu Liu
Summary: This study developed an innovative A-B process for carbon-neutral wastewater treatment by combining an anaerobic biofilm reactor (AnBR) as the A stage for energy recovery and a step-feed membrane bioreactor (MBR) as the B stage for mainstream deammonification. A multi-parameter control-based operation strategy was developed to address the challenge of selectively retaining ammonia-oxidizing bacteria (AOB) over nitrite oxidizing bacteria (NOB). Results showed that this process configuration achieved high removal rates of COD, ammonium-N, and total nitrogen, while promoting the growth and enrichment of anammox bacteria.
Article
Environmental Sciences
Xiaoyuan Zhang, Bin Ji, Junli Tian, Yu Liu
Summary: This study reported the development, performance, and microbial community of microalgal-bacterial biofilms for municipal wastewater treatment in a continuous-flow photoreactor. The results showed that microalgal-bacterial biofilms were successfully developed without external aeration. The biofilm concentrations reached steady-state at 4690 mg/L with a hydraulic retention time (HRT) of 9 h. Increasing HRT to 12 h did not enhance the biofilm accumulation but resulted in faster growth of microalgae, while the chlorophyll-a&b content in biofilms stabilized after the initial stage. Performance analysis revealed that microalgal-bacterial biofilms removed 90% of TOC, 71.4% of total nitrogen, and 72.6% of phosphorus in the steady-state photoreactor run at an HRT of 12 h with external aeration. Cyanobacteria and Chloroflexi were the dominant components, while Chlorophyta dominated the eukaryotic algal community in biofilms. This study provides insights into the development of microalgal-bacterial biofilms for sustainable low-carbon municipal wastewater treatment in continuous-flow photoreactors.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Agricultural Engineering
Xiaoyuan Zhang, Lei An, Junli Tian, Bin Ji, Jinfeng Lu, Yu Liu
Summary: This article provides a preliminary analysis on the carbon capture potential of microalgal cultivation, indicating that the energy consumption and nutrient input can result in significant indirect carbon emissions, making microalgal carbon capture less effective. The current processes may not be environmentally sustainable and economically viable, thus renewable energy and cheap nutrient sources should be explored to reduce indirect carbon emissions and promote complete nutrient recycling through using microalgae as biofertilizers or aquafeeds.
BIORESOURCE TECHNOLOGY
(2023)
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)
