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| 1 | Insights into sludge granulation during anaerobic treatment of high-strength leachate via a full-scale IC reactor with external circulation system显示文摘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 COD.The 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. | Tao Wang Zhenxing Huang Wenquan Ruan Mingxing Zhao Youlian Shao Hengfeng Miao | 2018 | Journal of Environmental Sciences2018，30，2： | 12 |
| 2 | Oligolayered Ti3C2Tx MXene towards high performance lithium/sodium storage显示文摘Nano Research volume 13,pages1659–1667(2020)Cite this article 232 Accesses 3 Citations Metrics details Abstract 2D MXenes are highly attractive for achieving ultrafast and stable lithium/sodium storage due to their good electric conductivity and abundant redox active sites.While,effective strategies for scalable preparation of oligolayered MXenes are still under exploration.Herein,oligolayered Ti3C2Tx MXene is successfully obtained after conventional synthesis of multilayered Ti3C2 and subsequent delamination process via an organic solvent of tetramethyl-ammonium hydroxide(TMAOH).Comprehensive electrochemical study reveals that surface-controlled redox reaction dominated the charge storage behavior of oligolayered Ti3C2Tx with fast reaction kinetics.Impressively,the obtained oligolayered Ti3C2Tx exhibits excellent lithium/sodium storage performance,featured for a high specific capacity of 330 mAhg^−1 at 1.0 Ag^−1 after 800 cycles for lithium storage and 280 mAhg^−1 at 0.5 Ag^−1 after 500 cycles for sodium storage.Such impressive performance will advance the development of oligolayered Ti3C2Tx based materials for lithium/sodium storage and even broaden their application into energy storage. | Xiaolan Song Hui Wang Shengming Jin Miao Lv Ying Zhang Xiaodong Kong Hongmei Xu Ting Ma Xinyuan Luo Hengfeng Tan Dong Hu Chaoyong Deng Xinghua Chang Jianlong Xu | 2020 | Nano Research2020，13，6： | 4 |
| 3 | Carbonaceous and nitrogenous disinfection byproduct precursor variation during the reversed anaerobic–anoxic–oxic process of a sewage treatment plant显示文摘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 spectroscopy.Their DBP formation potentials(DBPFPs)after chlorination were further tested.Results 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 processes.Moreover,DOM in the wastewater displayed a high carbonaceous disinfection byproduct formation potential(C-DBPFP)in the fractions of MW>100 k Da and MW<5 k Da,and revealed an increasing tendency of nitrogenous disinfection byproduct formation potential(N-DBPFP)with decrease of MW.For polarity-based fractions,the HPO fraction of wastewater showed significantly higher C-DBPFP and N-DBPFP than hydrophilic and transphilic fractions.Therefore,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 DOM.In 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. | Huihui Han Hengfeng Miao Yajing Zhang Minfeng Lu Zhenxing Huang Wenquan Ruan | 2018 | Journal of Environmental Sciences2018，30，3： | 3 |
| 4 | Identical full-scale biogas-lift reactors(BLRs) with anaerobic granular sludge and residual activated sludge for brewery wastewater treatment and kinetic modeling显示文摘Two identical full-scale biogas-lift reactors treating brewery wastewater were inoculated with diferent 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)/(m3·day), COD removal efciency of 80%, and efuent 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/(m3·day),COD removal efciency of 90%, and efuent COD of 240 mg/L. Diferences in sludge characteristics, biogas compositions, and biogaslift processes may be accounted for the superior efciency of the treatment performance of R2over R1. Grau second-order and modified StoverKincannon models based on influent and efuent concentrations as well as hydraulic retention time were successfully used to develop kinetic parameters of the experimental data with high correlation coefcients(R2> 0.95), which further showed that R2had higher treatment performance than R1. These results demonstrated that residual activated sludge could be used efectively instead of anaerobic granular sludge despite the need for a longer time. | Fu Xu Zhenxing Huang Hengfeng Miao Hongyan Ren Mingxing Zhao Wenquan Ruan | 2013 | Journal of Environmental Sciences2013，25，10： | 2 |
| 5 | Detoxification and degradation of microcystin-LR and -RR by ozonation 显示文摘 | MIAO Hengfeng QIN Fang TAO Guanjun | 2010 | Chemosphere2010，79，4： | 1 |
| 6 | En- hancement of Taihu blue algae anaerobic digestion effi- ciencyby natural storage 显示文摘 | Hengfeng Miao Minfeng Lu Mingxing Zhao Zhenxing Huang Hongyan Ren Qun Yan Wenquan Ruan | 2013 | Bioresource Technology2013，，149： | 1 |
| 7 | Performance and microbial response during the fast reactivation of Anammox system by hydrodynamic stress control显示文摘Anaerobic ammonium oxidation(Anammox)has become a promising method for biological nitrogen removal.However,this biotechnology application is always limited due to the low growth rate and biomass yield of Anammox bacteria.This study investigated the process of fast reactivation of an Anammox consortium idled for 2 years via hydrodynamic stress control.The results showed that the Anammox system was efficiently and quickly reactivated by shortening of the hydraulic retention time(HRT)of the reactor from 12 to6 hr within 68 days of operation.Moreover,at a 4-hr HRT with an influent total nitrogen loading rate of 1.2 kg N/(m3·day),the reactor maintained high biological performance with an ammonium removal loading rate of 0.52 kg N/(m3·day)and a nitrite removal rate of0.59 kg N/(m3·day).In the reactivated Anammox reaction,the stoichiometric coefficients of NH4+–N to NO2-–N and NH4+–N to NO3-–N were 1:1.04±0.08 and 1:0.31±0.03,respectively.The specific Anammox activity and hydrazine oxidoreductase activity,both of which represent the degree of Anammox bacteria present,increased as the hydrodynamic stress increased and were maximally(125.38±3.01 mg N/(g VSS·day)and 339.42±6.83μmol/(min·g VSS),respectively)at 4-hr HRT.Microbial response analysis showed that the dominant microbial community was obviously shifted and the dominance of Anammox bacteria was enhanced during the hydrodynamic selection. | Yuan Li Zhenxing Huang Wenquan Ruan Hongyan Ren Hengfeng Miao | 2014 | Journal of Environmental Sciences2014，26，9： | 1 |
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