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学者姓名:杨艳玲
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摘要 :
The impact of carbon/nitrogen (C/N) ratio on sequencing batch biofilm reactor (SBBR) initiated with different seed sludges for treating actual mariculture effluent was explored. Increasing the C/N ratio significantly enhanced the nitrogen removal efficiency, achieving average removal efficiency of 95% for ammonia nitrogen and 73% for total nitrogen at ratio of 30, while the impact of seed sludge was minimal. High C/N ratio promoted the secretion of tightly bound extracellular polymeric substances (TB-EPS), which showed significant correlation with nitrogen removal. Interactions between bacteria and archaea were enhanced and conditionally rare or abundant taxa were the keystone taxa. High C/N ratio inhibited the relative abundance of ammonia-oxidizing archaea (Candidatus_Nitrosopumilus) and bacteria (Nitrosomonas), but promoted the heterotrophic nitrificationaerobic denitrification bacteria (Halomonas). The expression of nitrogen removal functional genes significantly correlated with functional genera. This study emphasized the crucial role of high C/N ratios in biological nitrogen removal from actual mariculture effluent.
关键词 :
Functional genera Functional genera Nitrogen removal Nitrogen removal Mariculture effluent Mariculture effluent Carbon/nitrogen ratio Carbon/nitrogen ratio Bacteria/archaea Bacteria/archaea
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GB/T 7714 | Fan, Xiao-Yan , Zhou, Shi-Long , Yang, Yanling et al. Impact of carbon/nitrogen ratio on sequencing batch biofilm reactors initiated with different seed sludges for treating actual mariculture effluents [J]. | BIORESOURCE TECHNOLOGY , 2024 , 417 . |
MLA | Fan, Xiao-Yan et al. "Impact of carbon/nitrogen ratio on sequencing batch biofilm reactors initiated with different seed sludges for treating actual mariculture effluents" . | BIORESOURCE TECHNOLOGY 417 (2024) . |
APA | Fan, Xiao-Yan , Zhou, Shi-Long , Yang, Yanling , Cao, Shen-Bin , Niu, Yue , Zheng, Meng-Yuan et al. Impact of carbon/nitrogen ratio on sequencing batch biofilm reactors initiated with different seed sludges for treating actual mariculture effluents . | BIORESOURCE TECHNOLOGY , 2024 , 417 . |
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摘要 :
The physicochemical properties of powdered activated carbon (PAC) are important factors affecting its adsorption performance, which is also related to the characteristics of target organic pollutants. In this study, the key indicators affecting the adsorption performance of PAC were identified, and the physicochemical properties of PACs were modified by hydrogen peroxide and/or ultrasound in a targeted manner to improve the adsorption performance. The results indicated the adsorption properties of printing and dyeing secondary effluent organic matter (EfOM) in terms of CODcr and UV absorbance at 254 nm (UV254) positively correlated with mesoporous volume, average pore size and acid group content of PAC. After modification, the mesoporous volume and average pore size of PAC increased, and the number of acidic groups increased, thus enhancing the adsorption efficiency. EfOM removal characteristics showed that PAC preferentially adsorbed unsaturated bonds or aromatic compounds, tryptophan-like proteins, soluble microbial metabolites and low molecular weight fractions below 1 kDa. In addition, the relative contents of specific surface area, pore volume and oxygen-containing functional groups (O-C--O, C-OH, C--O/O-C-O) of PAC decreased after adsorption, indicating that EfOM adsorption was a physical and chemical process, including pore filling, hydrophobic interaction and chemical bond force interaction. In general, PACs with larger mesoporous volume, average pore size and abundant acid groups possessed good adsorption performance towards EfOM.
关键词 :
Powdered activated carbon (PAC) Powdered activated carbon (PAC) Adsorption mechanism Adsorption mechanism Modification Modification Printing and dyeing process Printing and dyeing process Effluent organic matter (EfOM) Effluent organic matter (EfOM)
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GB/T 7714 | Zhou, Zhiwei , Yao, Yanyan , Yang, Yanling et al. Ultrasound-assisted H2O2 directional-modification of powdered activated carbon for the enhanced adsorption of secondary effluent organic matter from printing and dyeing processes [J]. | JOURNAL OF HAZARDOUS MATERIALS , 2023 , 449 . |
MLA | Zhou, Zhiwei et al. "Ultrasound-assisted H2O2 directional-modification of powdered activated carbon for the enhanced adsorption of secondary effluent organic matter from printing and dyeing processes" . | JOURNAL OF HAZARDOUS MATERIALS 449 (2023) . |
APA | Zhou, Zhiwei , Yao, Yanyan , Yang, Yanling , Li, Xing , Ren, Jiawei , Qin, Jiangwei . Ultrasound-assisted H2O2 directional-modification of powdered activated carbon for the enhanced adsorption of secondary effluent organic matter from printing and dyeing processes . | JOURNAL OF HAZARDOUS MATERIALS , 2023 , 449 . |
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摘要 :
A photo-Fenton catalyst Fe-carbon nitride (g-C3N4)/reduced graphene oxide (rGO) (labeled as FNGO) was prepared via two-step calcination thermal polymerization. rGO as a carrier of Fe-g-C3N4 accelerated the charge transfer and improved the reduction of Fe (III) as compared those of the binary Fe-g-C3N4 catalyst. The FNGO catalyst maintained a high surface area of 264.7 m2/g and its charge transfer rate was 2.77 times higher than Feg-C3N4. The decreasing transient photocurrent and increasing electrode resistance of FNGO, Fe-g-C3N4 and gC3N4 confirm the positive synergistic effect of Fe-N coordination and rGO in charge transfer. Under the synergistic of visible light irradiation and H2O2, the excellent degradation performance of FNGO towards rhodamine B was achieved (95.3 % removal) at Fe-doping content of 10 wt%, rGO loading content of 0.5 % and H2O2 addition of 1.5 mM. Hydroxyl radicals played a dominant role in the photocatalysis-Fenton system, which was related to the coordination of Fe-N, the carrier off-domain of rGO, and the Fe (III)/Fe (II) cycle promoted by photogenerated electron and superoxide radicals. The FNGO had a high stability, a wide pH adaptation (3- 11) and a low Fe-leaching. This novel ternary light-driven photo-Fenton catalyst of FNGO enabled efficient decontamination during advanced treatment of wastewater.
关键词 :
Fe (III)/Fe (II) cycle Fe (III)/Fe (II) cycle Visible light photocatalysis Visible light photocatalysis Photo-Fenton Photo-Fenton Fe-N coordination Fe-N coordination Charge transfer Charge transfer
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GB/T 7714 | Zhao, Fuwang , Yang, Yanling , Ji, Siyang et al. Photocatalysis-Fenton mechanism of rGO-enhanced Fe-doped carbon nitride with boosted degradation performance towards rhodamine B [J]. | JOURNAL OF WATER PROCESS ENGINEERING , 2023 , 55 . |
MLA | Zhao, Fuwang et al. "Photocatalysis-Fenton mechanism of rGO-enhanced Fe-doped carbon nitride with boosted degradation performance towards rhodamine B" . | JOURNAL OF WATER PROCESS ENGINEERING 55 (2023) . |
APA | Zhao, Fuwang , Yang, Yanling , Ji, Siyang , Yu, Rui , Li, Xing , Zhou, Zhiwei . Photocatalysis-Fenton mechanism of rGO-enhanced Fe-doped carbon nitride with boosted degradation performance towards rhodamine B . | JOURNAL OF WATER PROCESS ENGINEERING , 2023 , 55 . |
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摘要 :
Moderate chemical pre-oxidation of coagulation to remove algae without breakage of the algae cells and release of algal organic matter has been well reported, while little was known about moderate pre-photocatalysis fol-lowed by coagulation on the ultrafiltration performance and membrane fouling control during algae-laden water treatment. Herein, three pretreatment methods (photocatalysis, coagulation and moderate pre-photocatalysis-enhanced coagulation (PC)) were investigated to reduce membrane fouling during ultrafiltration of algae -laden water. Moderate photocatalysis by a composite of Bi2O3-TiO2/PAC (Bi-doped TiO2 nano-composites sup-ported by powdered activated carbon) not only avoided algae cell breakage and controlled the release of intracellular organic matter, but also halved the aluminum sulphate (AS) coagulant dosage, since Bi2O3-TiO2/ PAC acted as both a photocatalyst and flocculation core. Under optimal conditions (1.2 g/L Bi2O3-TiO2/PAC irradiated under visible light for 20 min and 0.1 mM AS), the removal of OD680, DOC and UV254 were 83.8 %, 60.3 % and 77.3 % respectively. Moderate photocatalysis degraded medium and high molecular weight organics (biopolymers, humic substances and building blocks) to low MW acidic and neutral organics, resulting in effective removals of humic substances and microbial metabolites typically present in algal-derived pollutant. Following PC pre-treatment with ultrafiltration, 87.5 % increase in the final specific flux, 96.1 % reduction in irreversible resistance, and a change in the fouling mechanism from cake layer blockage to intermediate blockage. In addition, the zeta potential was reduced and the interaction force between pollutant-pollutant/ membrane became a repulsive force. This work demonstrates the potential benefits of moderate pre-photocatalysis-enhanced coagulation to remove algal contaminants and mitigate ultrafiltration membrane fouling.
关键词 :
Ultrafiltration membrane fouling Ultrafiltration membrane fouling Moderate pre-oxidation Moderate pre-oxidation Microcystis aeruginosa Microcystis aeruginosa Enhanced coagulation Enhanced coagulation
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GB/T 7714 | Zhou, Zhiwei , Liu, Chunjiao , Tian, Liping et al. Moderate pre-photocatalysis-enhanced coagulation alleviates ultrafiltration membrane fouling of algae-laden water [J]. | JOURNAL OF WATER PROCESS ENGINEERING , 2023 , 56 . |
MLA | Zhou, Zhiwei et al. "Moderate pre-photocatalysis-enhanced coagulation alleviates ultrafiltration membrane fouling of algae-laden water" . | JOURNAL OF WATER PROCESS ENGINEERING 56 (2023) . |
APA | Zhou, Zhiwei , Liu, Chunjiao , Tian, Liping , Wang, Huiping , Yang, Yanling , Wang, Xiaobo et al. Moderate pre-photocatalysis-enhanced coagulation alleviates ultrafiltration membrane fouling of algae-laden water . | JOURNAL OF WATER PROCESS ENGINEERING , 2023 , 56 . |
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摘要 :
一种改性沸石除锰滤料的制备及快速启动方法,属于饮用水净化领域,所述的改性沸石除锰滤料是以天然沸石为原料,依次与一定浓度NaOH溶液、MnCl2·4H2O溶液以及KMnO4溶液震荡接触并沥水烘干而制得,快速启动方法是在接触氧化除锰滤池运行的初期,依次通过改性沸石除锰滤料的吸附耦合催化氧化除锰、高锰酸钾的强化氧化除锰,以及锰质活性滤膜的接触氧化除锰与高锰酸钾的强化氧化除锰的交替进行而实现的。本发明可解决天然锰砂产量不足、成本高、现有的接触氧化除锰滤池启动期长、启动期间存在锰超标风险等问题,不受地区、原水水质、滤池滤速的影响,可灵活应对各种锰超标的水源水,保障接触氧化除锰滤池在整个运行期间出水锰的稳定达标。
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GB/T 7714 | 李星 , 朱文博 , 杨艳玲 . 一种改性沸石除锰滤料的制备及快速启动方法 : CN202211022655.X[P]. | 2022-08-24 . |
MLA | 李星 et al. "一种改性沸石除锰滤料的制备及快速启动方法" : CN202211022655.X. | 2022-08-24 . |
APA | 李星 , 朱文博 , 杨艳玲 . 一种改性沸石除锰滤料的制备及快速启动方法 : CN202211022655.X. | 2022-08-24 . |
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摘要 :
建筑给水立管成环型式与水头损失消减效果研究
关键词 :
最不利点 最不利点 建筑给水管道 建筑给水管道 立管成环 立管成环 水头损失 水头损失 流量 流量
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GB/T 7714 | 刘航 , 杨艳玲 , 李星 et al. 建筑给水立管成环型式与水头损失消减效果研究 [J]. | 刘航 , 2021 , 47 (3) : 118-124 . |
MLA | 刘航 et al. "建筑给水立管成环型式与水头损失消减效果研究" . | 刘航 47 . 3 (2021) : 118-124 . |
APA | 刘航 , 杨艳玲 , 李星 , 周志伟 , 刘永旺 , 赵锂 et al. 建筑给水立管成环型式与水头损失消减效果研究 . | 刘航 , 2021 , 47 (3) , 118-124 . |
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摘要 :
Constructed wetlands (CWs) usually exhibit limits in functional redundancy and diversity of microbial community contributing to lower performances of nutrients removal in decentralized domestic sewage treatment. To address this quandary, heterotrophic nitrification-aerobic denitrification (HN-AD) bacteria was added in tidal flow CWs (TFCWs) developing for nitrogen (N) and phosphorus (P) removal. With addition of HN-AD bacteria, TFCWs could be setup more rapidly and obtained better removal efficiencies of 66.9%-70.1% total nitrogen (TN), and 88.2%-92.4% total phosphorus (TP) comparing with control systems (TN: 53.9%; TP: 83.9%) during stable operation. Typical-cycles variations showed that TFCWs with addition of HN-AD bacteria promoted NO3--N and NH4+-N removal respectively under hydraulic retention time (HRT) of 14 h and 8 h with slight NO2--N accumulation. Activated alumina (AA) coupled with HN-AD bacteria decreased P release and relieved its poor removal performance in CWs. Based on metagenomic taxa and functional annotation, Pseudomonas and Thauera played pivotal roles in N removal in TFCWs. Furthermore, gradient oxic environments by 8 h-HRT promoted co-occurrence of heterotrophic nitrifiers (mostly Pseudomonas stutzeri) and autotrophic nitrifiers (mostly Nitrosomonas europaea. and Nitrospira sp.) which potentially accelerated NH4+-N transformation by elevated nitrification and denitrification related genes (e.g. amoABC, hao, napA and nirS genes). Meanwhile, the addition of HN-AD bacteria stimulated nirA and gltD genes of N assimilation processes probably leading to NH4+-N directly removal. The conceptual model of multi-metabolism regulation by HN-AD process highlighted importance of glk, gap2 and PK genes in glycolysis pathway which were vital drivers to nutrients metabolism. Overall, this study provides insights into how ongoing HN-AD bacteria addition effected microbial consortia and metabolic pathways, serving theoretical basis for its engineered applications of TFCWs in decentralized domestic sewage treatment. (C) 2021 Elsevier B.V. All rights reserved.
关键词 :
Tidal flow constructed wetlands Tidal flow constructed wetlands Heterotrophic nitrification-aerobic denitrification bacteria Heterotrophic nitrification-aerobic denitrification bacteria Metagenomics Metagenomics Enhanced N and P removal Enhanced N and P removal
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GB/T 7714 | Tan, Xu , Yang, Yan-Ling , Li, Xing et al. Multi-metabolism regulation insights into nutrients removal performance with adding heterotrophic nitrification-aerobic denitrification bacteria in tidal flow constructed wetlands [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2021 , 796 . |
MLA | Tan, Xu et al. "Multi-metabolism regulation insights into nutrients removal performance with adding heterotrophic nitrification-aerobic denitrification bacteria in tidal flow constructed wetlands" . | SCIENCE OF THE TOTAL ENVIRONMENT 796 (2021) . |
APA | Tan, Xu , Yang, Yan-Ling , Li, Xing , Gao, Yu-Xi , Fan, Xiao-Yan . Multi-metabolism regulation insights into nutrients removal performance with adding heterotrophic nitrification-aerobic denitrification bacteria in tidal flow constructed wetlands . | SCIENCE OF THE TOTAL ENVIRONMENT , 2021 , 796 . |
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摘要 :
Vacuum ultraviolet/persulfate (VUV/PS) has been a prospective method for antibiotics removal, however, the enhanced degradation mechanism is still unclear. This study compared the sulfamethazine (SMT) degradation by VUV/PS and ultraviolet/persulfate (UV/PS) processes using a photoreaction system. Results showed that the SMT degradation rate and PS activation rate by VUV/PS was 1.36 times and 1.39 times those of the conventional UV/PS process under the same dosage of PS, respectively. VUV/PS also achieved a high SMT mineralization. SO4 center dot(-) and HO center dot played important roles in the degradation of SMT by both processes, while the role of center dot O-2(-) was little. SMT concentration changed the distributions of 185 nm and 254 nm photons absorbed by solution components and altered the initiated photolysis reaction. Both processes had faster degradation rates at low initial SMT concentrations and the optimum reaction condition was at solution pH of 5. The inhibited level of the SMT degradation in both processes by four anions was in the following order: NO3- > Cl- > HCO3- > SO42-. VUV/PS process was also more efficient than UV/PS for degrading environmental (200 mu g/L) and high (5 mg/L) concentration of SMT from three kinds of typical water matrices (tap, river and lake water). Finally, ten photo-products of SMT degradation by VUV (or UV) were identified, which were mainly the oxidized products of C-N, -NH2 and S-C on SMT molecules, and four degradation pathways were proposed. Overall, these findings could provide useful insights into the application of VUV/PS in efficient antibiotics removal from water.
关键词 :
Vacuum ultraviolet Vacuum ultraviolet Ultraviolet Ultraviolet Persulfate Persulfate Sulfamethazine Sulfamethazine Degradation pathway Degradation pathway
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GB/T 7714 | Li, Hang , Yang, Yan-Ling , Li, Xing et al. Enhanced degradation mechanism of sulfamethazine by vacuum ultraviolet/persulfate [J]. | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2021 , 9 (6) . |
MLA | Li, Hang et al. "Enhanced degradation mechanism of sulfamethazine by vacuum ultraviolet/persulfate" . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 9 . 6 (2021) . |
APA | Li, Hang , Yang, Yan-Ling , Li, Xing , Fan, Xiao-Yan , Wang, Nan . Enhanced degradation mechanism of sulfamethazine by vacuum ultraviolet/persulfate . | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING , 2021 , 9 (6) . |
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摘要 :
This study explored the quantitative mechanisms of heterotrophic nitrification-aerobic denitrification (HN-AD) in a pilot-scale two-stage tidal flow constructed wetland (TFCW). The TFCW packed shale ceramsite (SC) and activated alumina (AA) at each stage, respectively, and aimed to improve decentralized wastewater treatment efficiency. In start-up phases, AA-TFCW accelerated NH4+-N decline, reaching transformation rates of 6.68 mg NH4+-N/(L.h). In stable phases, SC-AA-TFCW resisted low-temperatures (<13 degrees C), achieving stable NH4+-N and TN removal with effluents ranging 6.36-8.13 mg/L and 9.43-14.7 mg/L, respectively. The dominant genus, Ferribacterium, was the core of HN-AD bacteria, simultaneously removing NH4+-N and NO3--N by nitrate assimilation and complete denitrification (NO3--N -> N2), respectively. The quantitative associations highlighted importance of nitrification, nitrate assimilation, and denitrification in nitrogen removal. HN-AD bacteria (e.g., Lactococcus, Thauera, and Aeromonas) carried high-weight genes in quantitative associations, including napAB, nasA and gltBD, implying that HN-AD bacteria have multiple roles in SC-AA-TFCW operation.
关键词 :
Low temperature Low temperature Quantitative ecology associations Quantitative ecology associations Heterotrophic nitrification-aerobic denitrifica-tion Heterotrophic nitrification-aerobic denitrifica-tion Tidal flow constructed wetland Tidal flow constructed wetland Nitrogen removal Nitrogen removal
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GB/T 7714 | Tan, Xu , Yang, Yan-Ling , Liu, Yong-Wang et al. Quantitative ecology associations between heterotrophic nitrification-aerobic denitrification, nitrogen-metabolism genes, and key bacteria in a tidal flow constructed wetland [J]. | BIORESOURCE TECHNOLOGY , 2021 , 337 . |
MLA | Tan, Xu et al. "Quantitative ecology associations between heterotrophic nitrification-aerobic denitrification, nitrogen-metabolism genes, and key bacteria in a tidal flow constructed wetland" . | BIORESOURCE TECHNOLOGY 337 (2021) . |
APA | Tan, Xu , Yang, Yan-Ling , Liu, Yong-Wang , Li, Xing , Zhu, Wen-Bo . Quantitative ecology associations between heterotrophic nitrification-aerobic denitrification, nitrogen-metabolism genes, and key bacteria in a tidal flow constructed wetland . | BIORESOURCE TECHNOLOGY , 2021 , 337 . |
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摘要 :
一种可调式静态水力混合方法与测控系统,属于水处理设备与调控技术领域。本发明专利能够通过流量计和压力传感器实时监测可调式静态管道混合器的进水流量和进出水压力值的变化,经微电脑自控系统建立的相关性函数综合计算进水流量、水头损失、可调式混合部件开闭角度θ、静态管道混合器局部阻力系数的对应数值,得到不同流量条件下的速度梯度(G值),与经过检测和验证的额定流量G0值进行对比,对混合效率进行判别与综合评估后,由微电脑自控系统控制自动调节装置调控可调式混合部件的开闭角度θ,使得G值稳定在G0值或处在最佳阈值范围内。
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GB/T 7714 | 李星 , 赵嘉珩 , 杜鹏 et al. 一种可调式静态水力混合方法与测控系统 : CN202110581831.2[P]. | 2021-05-26 . |
MLA | 李星 et al. "一种可调式静态水力混合方法与测控系统" : CN202110581831.2. | 2021-05-26 . |
APA | 李星 , 赵嘉珩 , 杜鹏 , 杨艳玲 . 一种可调式静态水力混合方法与测控系统 : CN202110581831.2. | 2021-05-26 . |
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