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Degradation of refractory organics in concentrated leachate by the Fenton process: Central composite design for process optimization

Senem Yazici Guvenc, Gamze Varank

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1294-1

Abstract: Abstract • 90% total COD, 95.3% inert COD and 97.2% UV254 were removed. • High R2 values (over 95%)removal. • Fenton oxidation was highly-efficient method for inert COD removal. • BOD5/COD ratio of leachateThe primary aim of this study is inert COD removal from leachate nanofiltration concentrate because of, color, inert COD and UV254 removal are selected as the responses., by the model, whereas the total COD, color, inert COD and UV254 removal efficiencies are found respectively

Keywords： Concentrated leachate     Fenton oxidation     Central composite design     Biodegradability     Inert COD    

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Research and Development of Inert cathode and Anode in Aluminium Electrolysis

Qiu Zhuxian

Strategic Study of CAE 2001, Volume 3, Issue 5,   Pages 50-54

Abstract: They include inert cathode, inert anode, dipolar electrode and SiC side lining.

Keywords： inert anode     inert cathode     SiC side lining     aluminium electrolysis at lower temperatures    

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Nitrate removal to its fate in wetland mesocosm filled with sponge iron: Impact of influent COD/N ratio

Zhihao Si, Xinshan Song, Xin Cao, Yuhui Wang, Yifei Wang, Yufeng Zhao, Xiaoyan Ge, Awet Arefe Tesfahunegn

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1183-7

Abstract: CW-Fe allowed a high-performance of NO3‒-N removal at the COD/N ratio of 0.Higher COD/N resulted in lower chem-denitrification and higher bio-denitrification.The NO3‒-N reduction property and water quality parameters (pH, DO, and ORP) were examined at three CODproduced by chemical denitrification, and approximately 50% of the NO3‒-N was reduced to NH4+-N, at the CODAlthough chemical denitrification mediated by s-Fe0 led to an accumulation of NH4+-N at COD/N ratios

Keywords： Sponge iron     Wetland mesocosm     Electronic donor     Denitrification     COD/N ratio    

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microflora and its bioaugmentation on anaerobic wastewater treatment for enhancing methane production and COD

Chong Liu, Jianzheng Li, Shuo Wang, Loring Nies

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0856-8

Abstract: Methane yield and COD removal were enhanced by bioaugmentation of microflora B83.To enhance anaerobic wastewater treatment process for methane production and COD removal, a syntrophicWith the same inoculation dosage of the microflora B83, COD removal in organic wastewater treatment processwas improved from 75.6% to 86.6%, while the specific methane production by COD removal was increased

Keywords： Anaerobic wastewater treatment     Methane production     Hydrogen-producing acetogenesis     Methanogenesis     Rate-limiting step     Bioaugmentation    

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mechanisms of key functional microorganisms in the partial denitrification-anammox process induced by COD

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1703-3

Abstract:

● The availability of PD-anammox was investigated with higher NO3––N concentration.

Keywords： PD-anammox process     Nitrite accumulation     COD     Microbial interaction    

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Characterization of CANON reactor performance and microbial community shifts with elevated COD/N ratios

Yao Zhang, Yayi Wang, Yuan Yan, Haicheng Han, Min Wu

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 1, doi: 10.1007/s11783-019-1095-6

Abstract:

COD/N at low ratios (0–0.82) improved N removals of CANON.

CANON performance decreased after COD/N up tolistitem>

The relative abundance of AOB decreased continuously with increasing COD

AOB outcompeted at a high COD load led to CANON>

The relative abundance of AnAOB decreased and increased with increasing COD

Keywords： CANON process     COD/N ratio     Anammox     Ammonia oxidizing bacteria     Aerobic heterotrophic bacteria    

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Development of Aluminium Electrolytic Industry at the Beginning of the 21 st Century

Qiu Zhuxian

Strategic Study of CAE 2003, Volume 5, Issue 4,   Pages 41-46

Abstract: cells, there may be three ways:Using low-temperature electrolysis technology (at 800〜9001℃ ); Using inert

Keywords： aluminium electrolytic industry     large prebaked anode cell     aluminium electrolysis at lower temperature     inertcathode and inert anode    

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A new fracture criterion for peridynamic and dual-horizon peridynamics

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 629-641 doi: 10.1007/s11709-017-0447-1

Abstract: A new fracture criterion based on the crack opening displacement for peridynamic (PD) and dual-horizon peridynamics (DH-PD) is proposed. When the relative deformation of the PD bond between the particles reaches the critical crack tip opening displacement of the fracture mechanics, we assume that the bond force vanishes. A new damage rule similar to the local damage rule in conventional PD is introduced to simulate fracture. The new formulation is developed for a linear elastic solid though the extension to nonlinear materials is straightforward. The performance of the new fracture criterion is demonstrated by four examples, i.e. a bilateral crack problem, double parallel crack, monoclinic crack and the double inclined crack. The results are compared to experimental data and the results obtained by other computational methods.

Keywords： Castigliano’s theorem     breaking energy     critical extension     XFEM     COD     PD-COD    

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Biotoxicity evaluation of zinc oxide nanoparticles on bacterial performance of activated sludge at COD

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1453-z

Abstract:

• ZnO-NP disrupted metabolic/catabolic balance of bacteria by affecting DHA activity.

Keywords： Granular sludge     Biotoxicity     Reactive oxygen species     Extracellular polymeric substances    

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Fe - Ni - Co - Al2O3 Cermets Inert Anode for Aluminum Electrolysis

Qiu Zhuxian,Shi Zhongning,Xu Junli

Strategic Study of CAE 2004, Volume 6, Issue 8,   Pages 35-39

Abstract: graphite cathode of 120 mm×40 mm×20 mm and a Fe - Ni - Co -Al2O3 cermet inertelectrolysis cell was the decomposition of Al2O3 in the bath and the anode used was inert

Keywords： aluminum electrolysis     inert anode     back EMF value    

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Microalgae

Sanath KONDAVEETI,Kwang Soon CHOI,Ramesh KAKARLA,Booki MIN

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 784-791 doi: 10.1007/s11783-013-0590-4

Abstract: Renewable algae biomass, was used as substrate for generating electricity in two chamber microbial fuel cells (MFCs). From polarization test, maximum power density with pretreated algal biomass was 102 mW·m (951 mW·m ) at current generation of 276 mA·m . The individual electrode potential as a function of current generation suggested that anodic oxidation process of algae substrate had limitation for high current generation in MFC. Total chemical oxygen demand (TCOD) reduction of 74% was obtained when initial TCOD concentration was 534 mg·L for 150 h of operation. The main organic compounds of algae oriented biomass were lactate and acetate, which were mainly used for electricity generation. Other by-products such as propionate and butyrate were formed at a negligible amount. Electrochemical Impedance Spectroscopy (EIS) analysis pinpointed the charge transfer resistance (112 ?) of anode electrode, and the exchange current density of anode electrode was 1214 nA·cm .

Keywords： microbial fuel cell (MFC)     algae     bioelectricity     substrate     volatile fatty acid     biomass     COD removal efficiency    

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Cancer and the environment: Filling knowledge gaps together

Linda S. BIRNBAUM PhD, DABT, ATS,

Frontiers of Medicine 2010, Volume 4, Issue 2,   Pages 131-133 doi: 10.1007/s11684-010-0044-3

Abstract: Another factor is the fact that “inert ingredients” are not really inert. “Low dose

Keywords： environment     genes     environmental exposure     environmental agent     persistence     chemicals     inert ingredients    

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and microbial communities in full-scale IFAS and MBBR municipal wastewater treatment plants at high COD

Supaporn Phanwilai, Naluporn Kangwannarakul, Pongsak (Lek) Noophan, Tamao Kasahara, Akihiko Terada, Junko Munakata-Marr, Linda Ann Figueroa

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1374-2

Abstract: Abstract • Two IFAS and two MBBR full-scale systems (high COD:N ratio 8:1) were characterized. • HighInfluent COD to N ratios ranged from 8:1 to 15:1.The COD and BOD removal efficiencies were high (96%–98%); NH4+-N and TN removal efficiencies were moreThe extent of TN removal was higher at high SRT, high COD:N ratio and low DO concentration in the anoxic, and carriers with greater surface area may be recommended for high COD, BOD and TN removal in WRRFs

Keywords： IFAS     MBBR     AnodkalnessTM K1 carrier     Polypropylene resin carrier     Sponge carrier    

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Effects of Structure of Opening Hole in Gas Distributor on Drying Property for Fluidized Bed Drier

Liu Wei,Tang Wencheng

Strategic Study of CAE 2006, Volume 8, Issue 2,   Pages 47-50

Abstract: For comparing the hydromechanics and heat transfer property of inert particles fluidized bed drier betweenparameters, such as feed volume, gas temperature of entrance, gas rate of entrance, and diameter of inertthe results, some advice was proposed in the conclusion of this paper to improve the performance of inert

Keywords： gas distributor     structure with opening hole     inert particles     fluidized bed     drying property    

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Anaerobic treatment of fresh leachate from a municipal solid waste incinerator by upflow blanket filter reactor

Pinjing HE, Min LI, Suyun XU, Liming SHAO,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4,   Pages 404-411 doi: 10.1007/s11783-009-0149-6

Abstract: partial effluent recycling, the organic loading rates increased from 0.51to 14.56kg CODBased on the distribution of COD fluxes in the process, it was concluded that anabolism was the mainpathway of COD removal in the initial phase (1―33d), accounting for 57%―85% of totalCOD removed.anaerobic consortium of bacteria reached steady-state (after 70―86d), the majority of COD

Keywords： distribution of COD fluxes     effluent recycling     leachate     methane yield     organic loading rate     upflow blanket    

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Title Author Date Type Operation

Degradation of refractory organics in concentrated leachate by the Fenton process: Central composite design for process optimization

Senem Yazici Guvenc, Gamze Varank

Journal Article

Research and Development of Inert cathode and Anode in Aluminium Electrolysis

Qiu Zhuxian

Journal Article

Nitrate removal to its fate in wetland mesocosm filled with sponge iron: Impact of influent COD/N ratio

Zhihao Si, Xinshan Song, Xin Cao, Yuhui Wang, Yifei Wang, Yufeng Zhao, Xiaoyan Ge, Awet Arefe Tesfahunegn

Journal Article

microflora and its bioaugmentation on anaerobic wastewater treatment for enhancing methane production and COD

Chong Liu, Jianzheng Li, Shuo Wang, Loring Nies

Journal Article

mechanisms of key functional microorganisms in the partial denitrification-anammox process induced by COD

Journal Article

Characterization of CANON reactor performance and microbial community shifts with elevated COD/N ratios

Yao Zhang, Yayi Wang, Yuan Yan, Haicheng Han, Min Wu

Journal Article

Development of Aluminium Electrolytic Industry at the Beginning of the 21 st Century

Qiu Zhuxian

Journal Article

A new fracture criterion for peridynamic and dual-horizon peridynamics

Jinhai ZHAO, Hesheng TANG, Songtao XUE

Journal Article

Biotoxicity evaluation of zinc oxide nanoparticles on bacterial performance of activated sludge at COD

Journal Article

Fe - Ni - Co - Al2O3 Cermets Inert Anode for Aluminum Electrolysis

Qiu Zhuxian,Shi Zhongning,Xu Junli

Journal Article

Microalgae

Sanath KONDAVEETI,Kwang Soon CHOI,Ramesh KAKARLA,Booki MIN

Journal Article

Cancer and the environment: Filling knowledge gaps together

Linda S. BIRNBAUM PhD, DABT, ATS,

Journal Article

and microbial communities in full-scale IFAS and MBBR municipal wastewater treatment plants at high COD

Supaporn Phanwilai, Naluporn Kangwannarakul, Pongsak (Lek) Noophan, Tamao Kasahara, Akihiko Terada, Junko Munakata-Marr, Linda Ann Figueroa

Journal Article

Effects of Structure of Opening Hole in Gas Distributor on Drying Property for Fluidized Bed Drier

Liu Wei,Tang Wencheng

Journal Article

Anaerobic treatment of fresh leachate from a municipal solid waste incinerator by upflow blanket filter reactor

Pinjing HE, Min LI, Suyun XU, Liming SHAO,

Journal Article