Article
Engineering, Environmental
Yuanyuan Miao, Liang Zhang, Deshuang Yu, Jianhua Zhang, Wenke Zhang, Guocheng Ma, Xinchao Zhao, Yongzhen Peng
Summary: Intermittent aeration is an effective strategy for biological wastewater treatment, allowing for advanced nitrogen removal and reduced energy consumption. It is suitable for partial nitrification and denitrification processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Shiqi Wu, Na Lv, Yu Zhou, Xiufen Li
Summary: This study presents a novel Lysinibacillus fusiformis B301 strain that effectively removes nitrogenous pollutants via heterotrophic nitrification and aerobic denitrification (HN-AD) in one aerobic reactor. Under optimal conditions, it achieved high nitrogen removal rates for ammonium, nitrate, and nitrite. The strain preferentially consumed ammonium nitrogen and converted 83.25% of it to gaseous nitrogen.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Engineering, Environmental
Jie Wang, Ling Xia, Jieyu Chen, Xiaoning Wang, Hu Wu, Dapeng Li, George F. Wells, Jun Yang, Jie Hou, Xugang He
Summary: This study demonstrated the feasibility of achieving phosphorus removal through enhanced biological phosphorus removal (EBPR) in an intermittent aeration constructed wetland (CW). The integration of EBPR with simultaneous nitrification-endogenous denitrification (SNED) significantly improved phosphorus and nitrogen removal efficiency, providing a novel approach for advanced nutrient removal in CWs.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Bao Nguyen Quoc, Maxwell Armenta, John A. Carter, Robert Bucher, Pardi Sukapanpotharam, Samuel J. Bryson, David A. Stahl, H. David Stensel, Mari-Karoliina H. Winkler
Summary: The study found that the size of granules has a significant impact on the SND and biological phosphorus removal processes in the AGS system. Selecting granules within the size range of 212 - 1000 μm and avoiding DO values higher than 3 mgO(2)/L can achieve higher nitrogen removal capacity and energy savings.
Article
Agricultural Engineering
Dandan Pan, Sicheng Shao, Jinfeng Zhong, Minghui Wang, Xiangwei Wu
Summary: The long-term moving bed biofilm reactor (MBBR) was operated successfully for simultaneous removal of nitrogen, phosphorus, and COD. Different C/N ratios were tested, and the results showed efficient removal of these pollutants. The study also investigated the microbial communities and biological processes involved in the removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Bin Ma, Yanbing Liang, Yujian Zhang, Yan Wei
Summary: A partial-nitrification/anammox and endogenous partial-denitrification/anammox (PN/A-EPD/A) process was developed in a sequential batch biofilm reactor (SBBR) to achieve advanced nitrogen removal from low-carbon wastewater. The effluent total nitrogen (TN) reached 3.29 mg/L when the influent COD/TN and the TN were 2.86 and 59.59 mg/L, respectively. The stable PN/A-EPD/A process was achieved through four strategies, including treating the inoculated sludge with free nitrous acid, inoculating anammox biofilm, discharging excess activated sludge and residual ammonium at the end of oxic stage. The 16S rRNA high-throughput sequencing results showed the coexistence of anammox bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying glycogen accumulating organisms (DGAOs) and denitrifying phosphorus accumulating organisms (DPAOs) in the biofilms, with higher abundance of anammox bacteria in the inner layer and higher abundance of DGAOs and DPAOs in the outer layer.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Yumeng Xie, Xiangli Tian, Yu He, Shuanglin Dong, Kun Zhao
Summary: Recently, functional microorganisms capable of eliminating nitrogenous waste have been used in mariculture systems. Strain DN3, a potential candidate for treating mariculture wastewater, showed a high efficiency in removing ammonia, nitrate, and nitrite at various concentrations and conditions. The nitrogen assimilation pathway and bacterial nitrification pathway were investigated, and the results provide important insight into the nitrogen metabolism of Halomonas sp. and support the use of strain DN3 for treating mariculture wastewater.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mingdong Chang, Baorui Liang, Kuo Zhang, Youzhao Wang, Dongtian Jin, Qingjun Zhang, Liying Hao, Tong Zhu
Summary: In this study, simultaneous shortcut nitrification and denitrification (SND) was achieved in the hybrid membrane aerated biofilm reactor (H-MBfR) for treating low COD/N ratio wastewater. By controlling the dissolved oxygen to achieve SND, high removal efficiencies of NH4+-N, COD and TN were achieved. Microbial community analysis showed that the influent COD/N ratio had a significant influence on the microbial community structure, particularly at a COD/N ratio of 4.3. The analysis of membrane bio-fouling indicated that H-MBfR had lower extracellular polymeric substance (EPS) and mixed liquor suspended solids (MLSS), which is beneficial for long-term operation.
Review
Chemistry, Multidisciplinary
Ncumisa Mpongwana, Sudesh Rathilal
Summary: This review explores the properties of biofilms that can be exploited to enhance biological wastewater systems. It reveals that various biofilm properties, such as extracellular polymeric substances (EPS), quorum sensing (Qs), and acylated homoserine lactones (AHLs), can be enhanced to improve biofilm technology for wastewater treatment processes. The review also emphasizes the importance of exploiting these properties in simultaneous nitrification and denitrification and biological phosphorus removal processes.
APPLIED SCIENCES-BASEL
(2022)
Article
Agricultural Engineering
Fengxing Xie, Myat Thiri, Hui Wang
Summary: Six bacterial strains with simultaneous nitrification-denitrification abilities were isolated from a Beijing sewage treatment plant to improve nitrogen biodegradation efficiency. The strain X49, identified as Pseudomonas mendocina, was found to be the best strain for rapidly degrading high concentrations of inorganic nitrogen. X49 demonstrated efficient removal of ammonia, nitrite, and nitrate under aerobic conditions, achieving high degradation rates.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Xiaolin Zhou, Yuan Zhang, Zihao Li, Pengcheng Sun, Xiaoliang Hui, Xing Fan, Xuejun Bi, Tang Yang, Shujuan Huang, Lihua Cheng, Harsha Ratnaweera
Summary: The application of a novel two-stage anoxic/oxic-moving bed biofilm reactor (TS-A/O-MBBR) was validated in a full-scale municipal wastewater treatment plant (WWTP), and its working mechanism for biological nitrogen removal was analyzed. The results showed that the TS-A/O-MBBR process could effectively remove organic matter and nitrogen, meeting strict emission standards.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Mei-Qi Huang, You -Wei Cui, Ji-Lin Huang, Feng-Long Sun, Si Chen
Summary: A novel strain affiliated with Pseudomonas aeruginosa was isolated in this study, which was capable of heterotrophic nitrification-aerobic denitrification and aerobic phosphate removal. Under optimal conditions, the strain showed high removal efficiencies of ammonium (87%) and phosphate (97%). Gene amplification experiments revealed that the ammonium removal followed the complete HN-AD pathway, while phosphate removal only occurred under aerobic conditions.
Article
Environmental Sciences
Xiaolin Zhou, Xuejun Bi, Xing Fan, Tang Yang, Xiaodong Wang, Shanshan Chen, Lihua Cheng, Yuan Zhang, Weihua Zhao, Fangchao Zhao, Shichen Nie, Xiaoyu Deng
Summary: A two-stage anoxic/oxic-moving bed biofilm reactor system was established for municipal wastewater treatment. The system achieved high removal efficiencies for SCOD, NH4+-N, and TIN during different seasons. Functional bacterial populations were formed in different reactors, and the highest nitrification potential was found in the last oxic reactor of the first stage, while the highest denitrification potential was found in the post-anoxic reactors.
Article
Environmental Sciences
Xiaoying Zhang, Yuxiang Xia, Yiwei Zeng, Xia Sun, Ruidong Tao, Yunjun Mei, Mengjie Qu
Summary: Pseudomonas sp. Y-5 is a strain with simultaneous nitrification and denitrification capacity, capable of rapidly removing high concentrations of inorganic nitrogen. It can adapt to high concentrations of ammonia or organic nitrogen, and exhibits nitrification ability even in aerobic conditions, with high removal efficiencies for nitrate and nitrite.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Yahong Luo, Kui Yi, Xinyu Zhang, Boya Li, Runtong Cao, Yingmiao Pang, Mingxian Li, Chenglin Hou, Jinghua Lv, Xiaopin Li, Dong Li
Summary: In this study, two parallel anaerobic/aerobic sequencing batch reactors (R-1 and R-2) were used to treat low C/N wastewater, achieving advanced removal efficiencies of NH4+-N, TN, PO43--P, and CODintra. R-2 showed higher efficiency and achieved greater nitrite accumulation rate and removal loadings for TN and P. Different microbial structures and nutrient removal pathways were identified in each reactor.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Xinping Zhang, Yuxin Guo, Xiaoyang Liu, Shun-Yu Wu, Ya-Xuan Zhu, Shao-Zhe Wang, Qiu-Yi Duan, Ke-Fei Xu, Zi-Heng Li, Xiao-Yu Zhu, Guang-Yu Pan, Fu-Gen Wu
Summary: This study develops a nanotrigger HCFT for simultaneous photodynamic therapy and light-triggered ferroptosis therapy. The nanotrigger can relieve tumor hypoxia, induce enhanced photodynamic reaction, and facilitate the continuation of Fenton reaction, ultimately leading to lethal ferroptosis in tumor cells.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Olumide Bolarinwa Ayodele, Toyin Daniel Shittu, Olayinka S. Togunwa, Dan Yu, Zhen-Yu Tian
Summary: This study focused on the semihydrogenation of acetylene in an ethylene-rich stream using two alloyed Pt catalysts PtCu and PtCo. The PtCu catalyst showed higher activity and ethylene yield compared to PtCo due to its higher unoccupied Pt d-orbital density. This indicates that alloying Pt with Cu is more promising for industrial relevant SHA catalyst.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Guowei Chen, Wen-Cheng Chen, Yaozu Su, Ruicheng Wang, Jia-Ming Jin, Hui Liang, Bingxue Tan, Dehua Hu, Shaomin Ji, Hao-Li Zhang, Yanping Huo, Yuguang Ma
Summary: This study proposes an intramolecular dual-locking design for organic luminescent materials, achieving high luminescence efficiency and performance for deep-blue organic light-emitting diodes. The material also exhibits unique mechanochromic luminescence behavior and strong fatigue resistance.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Joren van Stee, Gregory Hermans, Jinu Joseph John, Koen Binnemans, Tom Van Gerven
Summary: This work presents a continuous solvent extraction method for the separation of cobalt and nickel in a millifluidic system using Cyphos IL 101 (C101) as the extractant. The optimal conditions for extraction performance and solvent properties were determined by investigating the effects of channel length, flow rate, and temperature. The performance of a developed manifold structure was compared to a single-channel system, and excellent separation results were achieved. The continuous separation process using the manifold structure resulted in high purity cobalt and nickel products.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Yan Xu, Jingai Jiang, Xinyi Lv, Hui Li, Dongliang Yang, Wenjun Wang, Yanling Hu, Longcai Liu, Xiaochen Dong, Yu Cai
Summary: A programmed gas release nanoparticle was developed to address the challenges in treating diabetic infected wounds. It effectively removes drug-resistant pathogens and remodels the wound microenvironment using NO and H2S. The nanoparticle can eliminate bacteria and promote wound healing through antibacterial and anti-inflammatory effects.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Tong Xia, Zhilin Xi, Lianquan Suo, Chen Wang
Summary: This study investigated a highly efficient coal dust suppressant with low initial viscosity and high adhesion-solidification properties. The results demonstrated that the dust suppressant formed a network of multiple hydrogen bonding cross-linking and achieved effective adhesion and solidification of coal dust through various chemical reactions.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jinzhi Cai, Zhenshan Li
Summary: A density functional theory-based rate equation was developed to predict the gas-solid reaction kinetics of CaO carbonation with CO2 in calcium looping. The negative activation energy of CaO carbonation close to equilibrium was accurately predicted through experimental validation.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Jianxiong Chen, Fuhao Ren, Ningning Yin, Jie Mao
Summary: This study presents an economically efficient and easily implementable surface modification approach to enhance the high-temperature electrical insulation and energy storage performance of polymer dielectrics. The self-assembly of high-insulation-performance boron nitride nanosheets (BNNS) on the film surface through electrostatic interactions effectively impedes charge injection from electrodes while promoting charge dissipation and heat transfer.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Zijian Li, Zhaohui Yang, Shao Wang, Hongxia Luo, Zhimin Xue, Zhenghui Liu, Tiancheng Mu
Summary: This study reports a strategy for upgrading polyester plastics into value-added chemicals using electrocatalytic methods. By inducing the targeted transfer of *OH species, polyethylene terephthalate was successfully upgraded into potassium diformate with high purity. This work not only develops an excellent electrocatalyst, but also provides guidance for the design of medium entropy metal oxides.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Navneet Singh Shekhawat, Surendra Kumar Patra, Ashok Kumar Patra, Bamaprasad Bag
Summary: This study primarily focuses on developing a sulphur dyeing process at room temperature using bacterial Lysate, which is environmentally friendly, energy and cost effective, and sustainable. The process shows promising improvements in dye uptake and fastness properties.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Dengjia Shen, Hongyang Ma, Madani Khan, Benjamin S. Hsiao
Summary: This study developed cationic PVC nanofibrous membranes with high filtration and adsorption capability for the removal of bacteria and hexavalent chromium ions from wastewater. The membranes demonstrated remarkable performance in terms of filtration efficiency and maximum adsorption capacity. Additionally, modified nanofibrous membranes were produced using recycled materials and showed excellent retention rates in dynamic adsorption processes.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Xiaoyan Wang, Zhikun Wang, Ben Jia, Chunling Li, Shuangqing Sun, Songqing Hu
Summary: Inspired by photosystem II, self-supported Fe-doped NiCoP nanowire arrays modified with carboxylate were constructed to boost industrial-level overall water splitting by employing the concerted proton-coupled electron transfer mechanism. The introduction of Fe and carboxyl ligand led to improved catalytic activity for HER and OER, and NCFCP@NF exhibited long-term durability for overall water splitting.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Pengyao Yu, Ge Yang, Yongming Chai, Lubomira Tosheva, Chunzheng Wang, Heqing Jiang, Chenguang Liu, Hailing Guo
Summary: Thin LTA zeolite membranes were prepared through secondary growth of nano LTA seeds in a highly reactive gel, resulting in membranes with superior permeability and selectivity in gas separation applications.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Baiqin Zhou, Huiping Li, Ziyu Wang, Hui Huang, Yujun Wang, Ruichun Yang, Ranran Huo, Xiaoyan Xu, Ting Zhou, Xiaochen Dong
Summary: The use of machine learning to predict the performance of specific adsorbents in phosphate adsorption shows great promise in saving time and revealing underlying mechanisms. However, the small size of the dataset and insufficient detailed information limits the model training process and the accuracy of results. To address this, the study employs a fuzzing strategy that replaces detailed numeric information with descriptive text messages on the physiochemical properties of adsorbents. This strategy allows the recovery of discarded samples with limited information, leading to accurate prediction of adsorption amount, capacity, and kinetics. The study also finds that phosphate uptake by adsorbents is generally through physisorption, with some involvement of chemisorption. The framework established in this study provides a practical approach for quickly predicting phosphate adsorption performance in urgent scenarios, using easily accessible information.
CHEMICAL ENGINEERING JOURNAL
(2024)
Article
Engineering, Environmental
Paula Alejandra Lamprea Pineda, Joren Bruneel, Kristof Demeestere, Lisa Deraedt, Tex Goetschalckx, Herman Van Langenhove, Christophe Walgraeve
Summary: This study evaluates the use of four esterified fatty acids and three vegetable oils as absorption liquids for hydrophobic VOCs. The experimental results show that isopropyl myristate is the most efficient liquid for absorbing the target VOCs.
CHEMICAL ENGINEERING JOURNAL
(2024)