Article
Environmental Sciences
Qingyu Zhao, Du Guo, Mingzhu Guo, Yan Li, Ming Zeng, Nan Wu, Linlin Hao
Summary: Hydrocyclone separator and modified volcanic rock coagulant were used to enhance the granulation process of aerobic granular sludge separately. The separator improved the sedimentation capacity of sludge and promoted nitrogen removal performance, while stimulating nitrogen-related microbial communities. The modified volcanic rock coagulant enhanced the settling performance of sludge. The addition of polyacrylamide had a weak effect on granulation.
WATER AND ENVIRONMENT JOURNAL
(2023)
Article
Engineering, Environmental
Wenxiang Zhang, Wenzhong Liang, Zhien Zhang, Tianwei Hao
Summary: This study investigates the performance of AGS-MBR in mitigating membrane fouling and reveals the scouring mechanism of AGS on membrane fouling. The results show that AGS-MBR has a low fouling rate and higher removal of organics and nutrients compared to conventional MBR. The scouring effect of AGS contributes significantly (39.9%) to mitigate membrane fouling.
Article
Environmental Sciences
Dong Li, Jingwei Yang, Yue Li, Jie Zhang
Summary: The study showed that using periodic famine and continuous feast strategies can cultivate mature AGS and promote the formation of microbial aggregates. The PF strategy can achieve high-level denitrification via SMP utilization, while the dominant bacteria under the CF strategy are fast-growing heterotrophic organisms.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Nathan Pacheco Amin Vieira da Costa, Nelson Libardi, Rejane Helena Ribeiro da Costa
Summary: The ability of extracellular polymeric substances (EPS) recovered from aerobic granular sludge (AGS) to act as bioflocculant was tested in a pilot-scale sequencing batch reactor (SBR), fed with low-strength municipal wastewater. EPS were compared with the addition of Na-alginate as a standardized biopolymer. The addition of both EPS and Na-alginate led to increased adhesion of particles and improved settling biomass in the reactor.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Xinye Jiang, Hongli Li, Qingyu Zhao, Peng Yang, Ming Zeng, Du Guo, Zhiqiang Fu, Linlin Hao, Nan Wu
Summary: This study provides guidance for exploring the rapid formation mechanism of aerobic granular sludge in a continuous flow reactor (CFR) and promoting its engineering application.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Review
Environmental Sciences
Fangrui Cai, Lirong Lei, Youming Li, Yuancai Chen
Summary: In recent years, the innovative biotechnology aerobic granular sludge (AGS) has shown significant potential in effectively treating recalcitrant wastewater due to its high biomass retention, resistance to toxicity, and layered structure. This review analyzes the structure of AGS and its applications in treating recalcitrant industrial effluents, highlighting the potential for biodegradation of refractory organics. Combining AGS with chemical pre-treatments or membrane bioreactors may offer economically feasible and promising alternatives for wastewater treatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
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
Laurence Strubbe, Margot Pennewaerde, Janis E. Baeten, Eveline I. P. Volcke
Summary: The use of aerobic granular sludge in continuous wastewater treatment plants can increase treatment capacity, but the potential diffusion limitation may counteract the positive effects of improved settling. Optimization measures, such as increasing reactor volume fraction and adjusting oxygen set-points, can enhance the treatment efficiency and reduce energy consumption in continuous systems.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Environmental Sciences
Shuli Liu, Miao Zhou, Glen T. Daigger, Jianping Huang, Gangfu Song
Summary: The high-efficiency and economic benefits of aerobic granular sludge (AGS) wastewater treatment have made it increasingly popular among academics and industrial players. AGS process can recycle high value-added biomaterials and remove pollutants from wastewater. This review comprehensively summarizes the effects of key operation parameters on AGS formation and structural stability, discusses the degradable metabolism of pollutants and microbial diversity in AGS wastewater treatment, and proposes recent attempts to produce high value-added biomaterials from AGS. It aims to provide a reference for further research on AGS process and offer a new alternative for wastewater treatment recycling.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Narendra Khatri, Mandeep Singh, Sumit Pokhriyal, Eldon R. Rene
Summary: This paper presents a computational fluid dynamics (CFD) study on the classification of primary sludge using a Rietema type hydrocyclone in an activated sludge process (ASP) based wastewater treatment plant. The CFD simulation was performed to study various parameters and validate the experimental results. The installation of the hydrocyclone for primary sludge classification resulted in energy savings of 3194 kWh/year for wastewater treatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Joao F. Silva, Joao R. Silva, Andreia D. D. Santos, Carolina Vicente, Jan Dries, Luis M. M. Castro
Summary: The authors conducted a study on treating synthetic dairy wastewater using aerobic granular sludge (AGS) in a laboratory-scale continuous flow reactor (CFR) system. The system consisted of an anaerobic reactor, an aerobic reactor, and a settling sedimentation tank, with different hydraulic retention times tested over a 90-day period. The study showed that the AGS system achieved excellent removal rates for chemical oxygen demand and total carbon, exceeding 90%. The effluent met Portuguese laws for direct release into the water environment, making it a viable treatment alternative.
Article
Biochemistry & Molecular Biology
Joanna Kazimierowicz, Marcin Debowski, Marcin Zielinski
Summary: The bioconversion of organic waste to biohydrogen via dark fermentation (DF) has limitations, but pretreating aerobic granular sludge (AGS) with solidified carbon dioxide (SCO2) can increase biohythane production. Increasing SCO2 doses resulted in higher concentrations of COD, N-NH4+, and P-PO43- in the supernatant. At a SCO2/AGS ratio of 0.3, the highest yield of biohythane production, with 79.0 +/- 6% CH4 and 8.9 +/- 2% H-2, was obtained.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Engineering, Environmental
Sara Toja Ortega, Lenno van den Berg, Mario Pronk, Merle K. de Kreuk
Summary: In this study, the hydrolytic activity in granules of different sizes in an aerobic granular sludge (AGS) reactor was compared. The results showed that the hydrolysis of bulk substrates was mainly restricted to the outer 100 μm of the granule surface. The microbial community analysis revealed that certain microorganisms were abundant in the vicinity of the hydrolytically active sites. Furthermore, it was found that the hydrolytic capacity of the granules depended mainly on the available surface area, regardless of their size.
Article
Environmental Sciences
Zixuan Liang, Jing Yi, Qun Gu, Xiaohu Dai
Summary: This study compares the performance of the full-scale conventional activated sludge (CAS) and the high-concentration powder carrier bio-fluidized bed (HPB) processes. The results show that the HPB process has a higher total nitrogen removal efficiency and can stabilize the effluent's total nitrogen below 10 mg/L, while reducing sludge production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Chemistry, Analytical
Xilan Li, Yuan An, Jiang Jin, Zhi Zhu, Linlin Hao, Lu Liu, Yongquan Shi, Daiming Fan, Tianhai Ji, Chaoyong James Yang
ANALYTICAL CHEMISTRY
(2015)
Article
Agricultural Engineering
Zhaolin Du, Tong Zheng, Peng Wang, Linlin Hao, Yanxia Wang
BIORESOURCE TECHNOLOGY
(2016)
Article
Engineering, Environmental
Linlin Hao, Tong Zheng, Jiping Jiang, Guangshan Zhang, Peng Wang
CHEMICAL ENGINEERING JOURNAL
(2016)
Article
Chemistry, Multidisciplinary
Linlin Hao, Masoom Kartik Desai, Peng Wang, Suresh Valiyaveettil
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2017)
Article
Environmental Sciences
Linlin Hao, Nannan Wang, Chang Wang, Guiju Li
Article
Environmental Sciences
Nannan Wang, Qiang Zhao, Han Xu, Wanyu Niu, Liang Ma, Dongcheng Lan, Linlin Hao
Article
Environmental Sciences
Nannan Wang, Linlin Hao, Jiaqing Chen, Qiang Zhao, Han Xu
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Article
Environmental Sciences
N. N. Wang, Q. Hu, L. L. Hao, Q. Zhao
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2019)
Article
Multidisciplinary Sciences
Linlin Hao, Peng Wang, Suresh Valiyaveettil
SCIENTIFIC REPORTS
(2017)
Article
Environmental Sciences
Guiju Li, Wenbo Cai, Ruihua Zhao, Linlin Hao
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Engineering, Chemical
Nannan Wang, Qi Hu, Xinyuan Du, Han Xu, Linlin Hao
ADVANCED POWDER TECHNOLOGY
(2019)
Article
Environmental Sciences
Guiju Li, Yaning Cao, Zhen Zhang, Linlin Hao
Summary: The study focused on the removal of ammonia nitrogen from wastewater using a membrane capacitor deionization system (MCDI) with a mesoporous carbon electrode and selective ion exchange membrane. The optimal conditions were determined, showing that the MCDI system can achieve over 80% removal efficiency for ammonia nitrogen. Results also demonstrated the feasibility of MCDI for removing different forms of inorganic nitrogen from water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Agricultural Engineering
Xinxin Xu, Shuang Liu, Ming Zeng, Hongli Li, Tingting Du, Nan Wu, Juanjuan Sun, Linlin Hao
Summary: This study investigated the inhibitory effects of different antibiotics on the anammox-based system, determining critical inhibition concentrations and using various models to describe the inhibition and recovery periods. Qualitatively, it was found that TC and OTC had the strongest inhibitory effects, while abundance of nitrogen functional genes was negatively correlated with antibiotics.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Linlin Hao, Mengzhu Liu, Nannan Wang, Guiju Li
Article
Engineering, Chemical
Yunfei Yu, Xue Yang, Chenchen Zhang, Jie Chen, Wei Lin, Jianqiang Meng
Summary: This study reports an environmentally friendly and simple approach for preparing double-network (DN) ion gel membranes with high strength and excellent gas separation performance. By optimizing crosslinking density, mass ratio, and the type and content of free ionic liquid, the mechanical and gas separation properties of the DN membrane are improved.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Si-qi Jiang, Qiang Gao, Xi-guang Li, Chao-zhu Deng, Jun Qiu, Xiang-nan Zhu
Summary: A dual-strengthening pretreatment method is proposed to remove PVDF more efficiently and enhance the leaching of LiCoO2. Experimental results show that dual-strengthening pretreatment can effectively remove PVDF and significantly improve the leaching efficiency compared to single pretreatment methods.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zengchi Hu, Xiaoyu Wang, Xiaohui Zhang, Xue Li, Jiangbin Xia
Summary: The rapid fabrication of high-performance composite membranes based on CMPs using simple and low-cost methods is challenging. In this study, three CMPs-based composite membranes were rapidly fabricated with adjustable size using unidirectional diffusion synthesis. The microstructural design enhanced the rejection rates of the membranes and they showed strong hydrolytic resistance, thermal stability, and acid-base resistance. Electrostatic adsorption and the adjustable microstructures significantly varied the repellence of the membranes to different charged molecules.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Farzaneh Rouhani, Matineh Ayedi, Nasser Safari
Summary: Introducing defects into porous metal-organic frameworks is important for improving their adsorption performance. Quasi-MOFs, an underutilized variant of large-scale, fundamentally deficient MOFs, have been found to have substantial amounts of unsaturated metal sites to offset the drawbacks of MOFs. In this study, a quasi-MOF was produced using a water-stable MOF and demonstrated significantly improved phosphate adsorption capability due to the presence of defect sites.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Valentin Reungoat, Morad Chadni, Louis M. M. Mouterde, Fanny Brunissen, Florent Allais, Helene Ducatel, Irina Ioannou
Summary: This study focuses on the recovery of sinapic acid using liquid-liquid extraction assisted by a hollow fiber membrane contactor from an aqueous feed obtained through the hydrolysis of mustard bran. The screening of solvents of different chemical nature showed that all tested solvents had an extraction efficiency of more than 80% for pH < 5. Four solvents were selected for use in the hollow fiber membrane contactor, and the volatile solvents showed higher mass transfer coefficients compared to non-volatile solvents. The extraction efficiency was intensified by increasing the initial concentration of sinapic acid and the feed-to-solvent ratio. CPME was found to have optimal recovery efficiency at a phase ratio of 8:1, yielding 0.9 g of sinapic acid per liter of CPME used.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Takahiro Sakamoto, Takafumi Hanada, Hayate Sato, Mayu Kamisono, Masahiro Goto
Summary: The emergence of the battery society has led to a high demand for battery metals, resulting in a strain on their supply. This study introduces a novel technique using a hydrophobic deep eutectic solvent (DES) for leaching and recovering battery metals from low-grade nickel laterite ores. The DES enables selective leaching and recovery of the metals, offering a promising pathway for the extraction of critical battery metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Rongrong He, Jiarui Chen, Chunyao Zhang, Dan Lu, Lin Zhang, Tao He
Summary: Researcher has developed a method to quantify the charge density in nanofiltration (NF) membrane separation layer and applied it in NF membranes that can separate Mg2+ and Li+. The results showed that overcompensated amine groups played a major role, and there was a linear relationship between charge density and coating bi-layers or PAH layers.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Zhijian Zhang, Min Chen, Zhe Lin, Zhichao Yang, Yafeng Du, Zhihui Chen, Zhenhao Yang, Kongyin Zhao, Ligang Lin
Summary: Membrane technology plays an important role in molecular/ion separation processes, but faces challenges such as membrane fouling. This study introduces a new ion-crosslinking method to fabricate copper alginate hydrogel membranes with improved mechanical strength and antimicrobial capabilities. The membranes exhibit excellent separation performance and enhanced long-term molecule/ion separation through improved anti-swelling properties. Molecular dynamics simulations and life cycle analysis highlight the pore structure and environmental friendliness of the hydrogel membranes. These findings provide valuable insights for developing sustainable hydrogel membranes with stable performance and high separation efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Dongmei Liu, Aiying Guo, Yanling Qi, Zhixin Ji, Hongjuan Li, Zhiwei Zhang, Xinyue Zhang, Kunze Wu, Aijun Cai
Summary: In this study, a stable magnetic Mg/Mn-layered double oxide-doped biochar composite (MgMnLDO-MBC) was prepared and successfully used for the removal of antibiotics and bacteria from wastewater. The composite exhibited enhanced surface areas, adsorption sites, and free radicals, leading to improved catalytic activity. The effects of different factors on the removal efficiency were evaluated, and the composite showed good reusability.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Feng Wang, Zhaoyong Bian, Yaru Zhang, Wenchao Yu, Qiang Zhang, Hui Wang
Summary: In this study, a nanofibrous layered structure of Ff-Ti3C2Tx-Co3O4 was prepared by self-assembling nanofibrous Co3O4 with lamellar fluorine-free MXene (Ff-Ti3C2Tx). The Ff-Ti3C2Tx-Co3O4 exhibited excellent catalytic activity for degradation, resistant to ionic interference, and maintained high removal efficiency of sulfamethoxazole (SMX) in municipal wastewater. The rapid SMX degradation involved fast electron transfer in redox cycles with PMS and the generation of 1O2 via PMS ->center dot O2 -> 1O2. This work provides new insights into antibiotic degradation mechanisms and electron transfer based on PMS activation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study comparatively evaluated the role of cationic, anionic, and nonionic polyacrylamides (PAMs) in ballasted flocculation of clay suspensions under different aluminum sulfate (AS) coagulant dosages. The selection of PAMs and AS dosage had a significant influence on the size and shear resistance of ballasted floc aggregates.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Lixian Wang, Lizhi Zhao, Didi Si, Zhixin Li, Huiqin An, Hui Ye, Qingping Xin, Hong Li, Yuzhong Zhang
Summary: Metalloporphyrin-based nanozymes integrated with poly (vinylidene fluoride) membrane show high catalytic activity and reusability for the decolorization of Congo Red dye in continuous flow process.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Yongfei Ma, Chenyu Zeng, Yongzhen Ding, Jiayi Tang, Ondrej Masek, Zhikang Deng, Rui Mu, Zulin Zhang
Summary: In this study, sludge-derived biochar (SBC) was functionalized with various iron salts to enhance its adsorption ability for sulfamethoxazole (SMX) and magnetic collection performance. Ball milling was further employed to treat the optimal iron salt functionalized SBC (MSBC), resulting in ball milled SBC (BMSBC) with improved adsorption performance for SMX. The dominant driving mechanism for SMX adsorption onto BMSBC was confirmed to be multiple physicochemical forces, including 7C-7C conjugation, pore filling, H-bonding, Fe-O complexation, and electrostatic interactions. BMSBC exhibited favorable adsorption ability for SMX in actual waters and could be easily collected within 1 min due to its magnetic sensitivity.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Jinglin Tan, Xiaohui Mao, Wenjihao Hu, Hongbo Zeng
Summary: This study investigates the influence of PDMS chain architectures on surface properties and reveals that PDMS coatings with looped structures exhibit superior hydrophobicity, self-cleaning, and water sliding compared to coatings with linear structures. Additionally, both looped and linear PDMS coated stainless steel mesh/polyester fibers show efficient separation of oil/water mixture.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Wei-Liang Chen, Chih-Chia Cheng, Chien-Hsing Lu, Jem-Kun Chen
Summary: This study designs a novel sandwich-structured capacitor that reduces the absorption time of pollutants using dielectrophoresis force. By coating graphene oxide on polystyrene microspheres as adsorbents and encapsulating them within the capacitor, the adsorption rate is significantly enhanced. Additionally, frequency manipulation allows for the recycling of adsorbents and concentration of dyes, minimizing secondary pollution.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
