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Insights into sludge granulation during anaerobic treatment of high-strength leachate via a full-scale IC reactor with external circulation system

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Journal of Environmental Sciences 2018年第2期30卷 227-234页

作者： Tao Wang zhenxing huang Wenquan Ruan Mingxing Zhao Youlian Shao Hengfeng Miao School of Environment and Civil Engineering Jiangnan University Wuxi 214122 China Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan University Wuxi 214122 China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou 215009 China

In this study, a full-scale internal circulation（IC） reactor coupled with an external circulation system was developed to treat high-strength leachate from a municipal solid waste（MSW）incineration plant, in which anaerobic sludge granulation was intensively investigated. Results showed that the IC reactor achieved excellent treatment performance under high organic loading rates（OLR） of 21.06–25.16 kg chemical oxygen demand（COD）/（m3？ day）. The COD removal efficiency and biogas yield respectively reached 89.4%–93.4% and 0.42–0.50 m3/kg *** formation of extracellular polymeric substances（EPS） was closely associated with sludge granulation. Protein was the dominant component in sludge EPS, and its content was remarkably increased from 21.6 to 99.7 mg/g Volatile Suspended Solid（VSS） during the reactor operation. The sludge Zeta potential and hydrophobicity positively correlated with the protein/polysaccharide ratio in EPS, and they were respectively increased from-26.2 m V and 30.35% to-10.6 m V and 78.67%, which was beneficial to microbial aggregation. Three-dimensional fluorescence spectroscopy（3 D-EEM） and Fourier transform infrared spectroscopy（FT-IR）analysis further indicated the importance of protein-like EPS substances in the sludge granulation. Moreover, it was also found that the secondary structures of EPS proteins varied during the reactor operation.

关键词： Internal circulation reactor Leachate Sludge granulation Extracellular polymeric substances External circulation

Carbonaceous and nitrogenous disinfection byproduct precursor variation during the reversed anaerobic–anoxic–oxic process of a sewage treatment plant

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Journal of Environmental Sciences 2018年第3期30卷 335-346页

作者： Huihui Han Hengfeng Miao Yajing Zhang Minfeng Lu zhenxing huang Wenquan Ruan School of Environmental & Civil Engineering Jiangnan University Wuxi 214122 China Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan University Wuxi 214122 China Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou 215009 China

Disinfection byproduct（DBP）precursors in wastewater during the reversed anaerobic–anoxic–oxic（A^2/O）process,as well as their molecular weight（MW）and polarity-based fractions,were characterized with UV scanning,fluorescence excitation emission matrix,Fourier transform infrared and nuclear magnetic resonance *** DBP formation potentials（DBPFPs）after chlorination were further *** indicated that the reversed A^2/O process could not only effectively remove the dissolved organic carbon（DOC）and dissolved total nitrogen in the wastewater,but also affect the MW distribution and hydrophilic–hydrophobic properties of dissolved organic matter（DOM）.The accumulation of low MW and hydrophobic（HPO）DOM was possibly due to the formation of soluble microbial product-like（SMP-like）matters in the reversed A^2/O treatment,especially in the anoxic and aerobic ***,DOM in the wastewater displayed a high carbonaceous disinfection byproduct formation potential（C-DBPFP）in the fractions of MW100 k Da and MW5 k Da,and revealed an increasing tendency of nitrogenous disinfection byproduct formation potential（N-DBPFP）with decrease of *** polarity-based fractions,the HPO fraction of wastewater showed significantly higher C-DBPFP and N-DBPFP than hydrophilic and transphilic ***,although the reversed A^2/O process could remove most DBP precursors by DOC reduction,it led to the enhancement of DBPFP with the formation and accumulation of low MW and HPO *** addition,strong correlations between C-DBPFPs and SUVA,and between N-DBPFPs and DON/DOC,were observed in the wastewater,which might be helpful for DBPFP prediction in wastewater and reclaimed water chlorination.

关键词： Dissolved organic matter Reversed anaerobic-anoxic-oxicprocess Disinfection byproducts Chlorination Molecular weight Hydrophobic

Identical full-scale biogas-lift reactors(BLRs) with anaerobic granular sludge and residual activated sludge for brewery wastewater treatment and kinetic modeling

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Journal of Environmental Sciences 2013年第10期25卷 2031-2040页

作者： Fu Xu zhenxing huang Hengfeng Miao Hongyan Ren Mingxing Zhao Wenquan Ruan School of Environment and Civil Engineering Jiangnan University

Two identical full-scale biogas-lift reactors treating brewery wastewater were inoculated with different types of sludge to compare their operational conditions, sludge characteristics, and kinetic models at a mesophilic temperature. One reactor （R1） started up with anaerobic granular sludge in 12 weeks and obtained a continuously average organic loading rate （OLR） of 7.4 kg chemical oxygen demand （COD）/（***）, COD removal efficiency of 80%, and effluent COD of 450 mg/L. The other reactor （R2） started up with residual activated sludge in 30 weeks and granulation accomplished when the reactor reached an average OLR of 8.3 kg COD/（m^3·day）, COD removal efficiency of 90%, and effluent COD of 240 mg/L. Differences in sludge characteristics,biogas compositions, and biogas- lift processes may be accounted for the superior efficiency of the treatment performance of R2 over R1. Grau second-order and modified StoverKincannon models based on influent and effluent concentrations as well as hydraulic retention time were successfully used to develop kinetic parameters of the experimental data with high correlation coefficients （R2 〉 0.95）, which further showed that R2 had higher treatment performance than R1. These results demonstrated that residual activated sludge could be used effectively instead of anaerobic granular sludge despite the need for a longer time.

关键词： anaerobic granular sludge residual activated sludge biogas-lift reactor brewery wastewater kinetic modeling

活性炭孔径分布测定与计算中的一些问题研究对几种孔径分布计算模型的分析比较

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离子交换与吸附 2012年第2期28卷 176-182页

作者：黄英金彦任黄振兴山西新华化工有限责任公司设计研究所

本文总结了计算中孔孔径分布的各种方法,并利用严继民和张启元推导的圆筒孔等效模型、BJH法、无模型法和杜比宁法对DP活性炭进行了孔径分布的计算,比较各种方法的差异。

关键词：孔径分布中孔

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米波雷达方位角超分辨外场实验研究

电子科技大学学报 2000年第2期29卷 111-114页

作者：何子达黄振兴向敬成电子科技大学电子工程学院成都610054

介绍了一个由均匀线接收阵和米波雷达组成的外场实验系统，用于进行米波雷达的方位角超分辨实验。用采集的实验数据对几种常用的超分辨算法进行了实验，结果表明，ＦＢＬＰ算法和ＥＳＰＡＩＴ算法可清晰分辨出角间隔为０．２～０．３波... 详细信息

介绍了一个由均匀线接收阵和米波雷达组成的外场实验系统，用于进行米波雷达的方位角超分辨实验。用采集的实验数据对几种常用的超分辨算法进行了实验，结果表明，ＦＢＬＰ算法和ＥＳＰＡＩＴ算法可清晰分辨出角间隔为０．２～０．３波束宽度的两架飞机。

关键词：米波雷达超分辨外场实验方位角

A MODIFIED HIGH-ORDER CUMULANT MUSIC ALGORITHM FOR SIGNAL DOA ESTIMATION

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Journal of Electronics(China) 2000年第4期17卷 319-324页

作者： He Zishu Li Yong huang zhenxing (College of Electron. Eng., University of Electronic Science & Technology of China, Chengdu 610054) College of Electron. Eng. University of Electronic Science & Technology of China Chengdu

This paper gives a MUSIC signal DOA estimation algorithm based on the modified high-order cumulant matrix which is constructed by the recieved data and their conjugate rearrangements. When the snapshot number is limited, this algorithm can improve the signal DOA estimation performances obviously, and its computational complexity scarcely increases. Finally, some simulation results to verify the theoretical analyses are presented.

关键词： High-order cumulant MUSIC algorithm Signal DOA estimation Array signal processing

Low-dose Dynamic Cerebral Perfusion CT Reconstruction Method Based on Voxel-level TAC Correction

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Low-dose Dynamic Cerebral Perfusion CT Reconstruction Method...

A METHOD FOR SOLVING DOA ESTIMATION AMBIGUITY IN ESPRIT ALGORITHM

第十七届中国体视学与图像分析学术会议

作者： Zixiang Chen Ying huang zhenxing huang Guotao Quan Xiang Li Xin Liu Hairong Zheng Dong Liang Hu Zhanli Lauterbur Research Center for Biomedical Imaging Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Chinese Academy of Sciences Key Laboratory of Health Informatics Department of CT Physics & Algorithms United Imaging Healthcare Group

Background Dynamic cerebral perfusion computed tomography(DCP-CT) is a advanced imaging technique that help in clinical diagnosis of cerebrovascular ***,the radiation dose deposition during the repeated CT scans serious choke off its clinical *** this study,we proposed a DCP-CT images reconstruction method that is able to reconstruct images from low-dose scan *** Raw DCP-CT data were acquired by uCT-960+(United Imaging Healthcare Inc.),and data corresponding to the middle slice of the detector were used in our ***-CT images were reconstructed from raw data using a least square-based iterative method accompanied with voxel-level time-attenuation curve(TAC) correction(LS-VC).Low-dose CT imaging protocol was simulated by data down-sampling(representing the mode of sparse-view) and adding gaussian noise to the down-sampled sinograms(representing the mode of reduced kVp).During the reconstruction iterations,dynamic image noise was eliminated from the temporal domain via the application of the theory of third-order Hermite interpolation(THI).Quantitative evaluations of the reconstructed images were carried out by using the peak signal-to-noise ratio(PSNR) and structural similarity(SSIM) referred to normal-dose DCPCT *** maps were calculated from the reconstructed images for imaging *** conventional FBP and the famous PICCS methods were involved for ***:Superior performance of the proposed PSVC method is demonstrated by the remarkable visual effect of image denoising and the better PSNR and SSIM values compared to several state-of-the-art ***,LSVC yields the best hemodynamic maps among all the compared ***:The proposed LSVC method has very advanced performance in DCP-CT image reconstruction with raw data acquired with a low-dose scan *** may effectively promote the clinical application of DCP-CT.

关键词： Low-dose dynamic cerebral perfusion CT Iterative reconstruction Voxel-level TAC correction Thirdorder Hermite interpolation Hemodynamic maps

来源： cnki会议评论

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Journal of Electronics(China) 2000年第4期17卷 325-330页

作者： He Zishu Li Yong huang zhenxing (Iust. of Electron. Eng., University of Electronic Science & Technology of China, Chengdu 610054) Inst. of Electron. Eng. University of Electronic Science & Technology of China Chengdu

This paper introduces a method for solving DOA estimation ambiguity in ESPRIT algorithm with the conventional beamformer. With the help of it, for any space of two subarrays, the signal DOA in [-π/2 ,π/2] can be estimated effectively by using ESPRIT algorithm. Finally, some simulation results to verify the theoretical analyses are presented.

关键词： ESPRIT algorithm Solving ambiguity Signal DOA estimation

两相厌氧耦合生物脱硫组合工艺处理糖蜜乙醇废水的性能

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食品与生物技术学报 2017年第3期36卷 252-258页

作者：李亚东肖小兰黄振兴江南大学环境与土木工程学院江苏无锡214122

采用两相厌氧耦合生物脱硫组合工艺处理糖蜜乙醇废水,在启动和运行过程对各处理单元的效能进行了测定分析。结果表明,当进水COD和SO_4^(2-)负荷提升至18~21 kg/(m^3·d)和0.8~1.1 kg/(m^3·d)时,组合工艺的COD和SO42-去除率可分别达到95... 详细信息

采用两相厌氧耦合生物脱硫组合工艺处理糖蜜乙醇废水,在启动和运行过程对各处理单元的效能进行了测定分析。结果表明,当进水COD和SO_4^(2-)负荷提升至18~21 kg/(m^3·d)和0.8~1.1 kg/(m^3·d)时,组合工艺的COD和SO42-去除率可分别达到95%~96%和86%~90%,出水中COD、SO_4^(2-)和硫化物含量分别为6 000~6 500、800~850、750~800 mg/L。从各处理单元的运行效能来看,一级厌氧和二级厌氧对COD去除的贡献率分别为86%和11%,同时两者对硫酸盐去除的贡献率分别为90%和7%;而生物脱硫贡献率较小,均在3%左右。由此可见,一级厌氧的处理效能要显著高于二级厌氧。此外生物脱硫单元在高负荷运行条件下的硫化物去除率较低(30%左右),增加曝气量虽然一定程度上可以增加溶氧以及缓解单质硫在陶粒表面的吸附,但同时也可能会影响生物膜的形成和硫细菌的固定,从而造成微生物大量流失。因此如何保证氧气、底物与硫细菌之间的高效传质将是今后需要进一步解决的关键问题之一。

关键词：两相厌氧耦合生物脱硫糖蜜乙醇废水硫酸盐还原菌产甲烷菌无色硫细菌