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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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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 application of s-Fe0 contributed to TIN removal in wetland mesocosm. s-Fe0 changed the main denitrifiersResults showed that the NO3‒-N removal efficiencies were significantly increased by 6.6 to 58.9% in theof 0 and 5, the TIN removal efficiencies increased by 4.5%‒12.4%.

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

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Enhanced nitrogen removal reliability and efficiency in integrated constructed wetland microcosms using

Yue WEN, Chao XU, Gang LIU, Yi CHEN, Qi ZHOU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 140-147 doi: 10.1007/s11783-011-0286-6

Abstract: The purpose of this study is to reduce the seasonal fluctuation and enhance the efficiency of nitrogen, but also enhanced the nitrogen removal efficiency by 50%.removal in VF1-HSF1 and VF2-HSF2, respectively.cold seasons was desorbed, and then nitrified in warm seasons, which resulted in a bioregeneration efficiencyenhancing nitrification, which was accompanied by high potential denitrification in HSF that reinforced the efficiency

Keywords： constructed wetland     zeolite     bioregeneration     nitrogen removal    

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Research progress in removal of trace carbon dioxide from closed spaces

ZHANG Yatao, FAN Lihai, ZHANG Lin, CHEN Huanlin

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 310-316 doi: 10.1007/s11705-007-0057-x

Abstract: In this paper, the removal of trace carbon dioxide from closed spaces through membrane process and biotransformationIt is found that higher CO removal efficiency can be obtained in biotransformation and membrane process

Keywords： removal efficiency     consumption     removal     CO removal     membrane microalgae    

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Nitrogen removal efficiencies and microbial communities in full-scale IFAS and MBBR municipal wastewatertreatment plants at high COD:N ratio

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: specific surface area carriers grew and retained slow-growing nitrifiers. • High TN removal is relatedInfluent 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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degrader-enhanced bioremediation with low-dose persulfate oxidation for polycyclic aromatic hydrocarbon removalin alkaline soil: efficiency and influence on ecological health

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1733-x

Abstract: After 42 d of remediation, the degradation efficiency of PAHs was 96.72% and 93.88% using persulfateaddition to the degradation of contaminants, persulfate oxidation promotes microbial bioremediation efficiency

Keywords： Bioaugmentation     Low-dose persulfate oxidation     Polycyclic aromatic hydrocarbon     Remediation    

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Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous C & N removal

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1522-y

Abstract:

• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.

Keywords： Methanogens     Biological Nitrogen Removal (BNR)     Simultaneous     Methammox     C:N ratio    

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Removal of arsenic by pilot-scale vertical flow constructed wetland

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-021-1435-1

Abstract:

• VFCWs are effective for the treatment of arsenic-containing wastewater.

Keywords： Constructed wetland     Arsenic     Removal efficiency     Mass balance    

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Arsenic and chromate removal from water by iron chips-Effects of anions

ZHANG Ruihua, SUN Hongwen, YIN Jin

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 203-208 doi: 10.1007/s11783-008-0036-6

Abstract: The purpose of this study is to estimate the removal efficiency of As and Cr (VI) by one kind of industrial

Keywords： phosphate     removal efficiency     industrial     typical inorganic    

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Removal of elemental mercury by KI-impregnated clay

Boxiong SHEN,Jianhong CHEN,Ji CAI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 236-243 doi: 10.1007/s11783-014-0765-7

Abstract: This study described the use of clay impregnated by KI in gas phase elemental mercury (Hg ) removal inThe effects of KI loading, temperature, O , SO and H O on Hg removal were investigated using a fixedThe Hg removal efficiency of KI-clay with 3% KI loading could maintain at a high level (approximatelyO was found to be an important factor in improving the Hg removal.NO and SO could slightly improve Hg removal, while H O inhibited it greatly.

Keywords： clay     elemental mercury     removal efficiency     potassium iodide     mechanism    

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Coupling evaluation for material removal and thermal control on precision milling machine tools

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 12-12 doi: 10.1007/s11465-021-0668-9

Abstract: However, previous research merely regarded the material removal (MR) energy as useful energy consumptionHence, the cutting energy efficiency model considering the coupling relationship is established basedThe forced cooling mode of TC results in a 7% reduction in cutting energy efficiency.This paper reveals the coupling effect of MR and TC on energy efficiency and machining accuracy.

Keywords： machine tools     cutting energy efficiency     thermal stability     machining accuracy     coupling evaluation    

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Microplastics in municipal wastewater treatment plants: a case study of Denizli/Turkey

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1699-8

Abstract:

● High amounts of microplastics are released to receiving media from WWTPs.

Keywords： Microplastics     Wastewater treatment plant     Removal efficiency     Daily discharge    

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Characteristics and removal mechanism of the precursors of N-chloro-2,2-dichloroacetamide in a drinking

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1338-6

Abstract:

• N-Cl-DCAM, an emerging N-DBP in drinking water was investigated.

Keywords： N-chloro-2     2-dichloroacetamide     Liquid chromatography with tandem mass spectrometry     Precursors     Removalefficiency     Ozonation integrated with biological activated carbon    

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Removal of non-point pollutants from bridge runoff by a hydrocyclone using natural water head

Jianghua YU, Yeonseok KIM, Youngchul KIM

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 886-895 doi: 10.1007/s11783-012-0449-0

Abstract: The TSS separation efficiency was evaluated based on a mass balance.Normally, the efficiency was more than 50% when the pressure was higher than 2 m.The results showed that the percentage of TSS, chemical oxygen demand (COD), total nitrogen (TN), and

Keywords： first flush     hydrocyclone     non-point pollution     removal efficiency     stormwater runoff    

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Occurrence and removal of selected polycyclic musks in two sewage treatment plants in Xi’an, China

Yongxiang REN, Kai WEI, Hua LIU, Guoqiang SUI, Junping WANG, Yanjun SUN, Xiaohui ZHENG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 166-172 doi: 10.1007/s11783-012-0471-2

Abstract: The occurrence and removal of two representative polycyclic musks, galaxolide (HHCB) and tonalide (AHTNThe removal efficiency of the two musks varied in the ranges of 43.1%–70.4% for HHCB and 54.2%–84.4%Advanced processes of activated sludge did not show a significant superiority on selected musk removalThe selected musk removal mainly resulted from the adsorption function of activated sludge.efficiency for the two musks.

Keywords： polycyclic musk     sewage     tonalide (AHTN)     galaxolide (HHCB)     removal efficiency     adsorption    

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Title Author Date Type Operation

Microalgae

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

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

Enhanced nitrogen removal reliability and efficiency in integrated constructed wetland microcosms using

Yue WEN, Chao XU, Gang LIU, Yi CHEN, Qi ZHOU

Journal Article

Research progress in removal of trace carbon dioxide from closed spaces

ZHANG Yatao, FAN Lihai, ZHANG Lin, CHEN Huanlin

Journal Article

Nitrogen removal efficiencies and microbial communities in full-scale IFAS and MBBR municipal wastewatertreatment plants at high COD:N ratio

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

Journal Article

degrader-enhanced bioremediation with low-dose persulfate oxidation for polycyclic aromatic hydrocarbon removalin alkaline soil: efficiency and influence on ecological health

Journal Article

Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous C & N removal

Journal Article

Removal of arsenic by pilot-scale vertical flow constructed wetland

Journal Article

Arsenic and chromate removal from water by iron chips-Effects of anions

ZHANG Ruihua, SUN Hongwen, YIN Jin

Journal Article

Removal of elemental mercury by KI-impregnated clay

Boxiong SHEN,Jianhong CHEN,Ji CAI

Journal Article

Coupling evaluation for material removal and thermal control on precision milling machine tools

Journal Article

Microplastics in municipal wastewater treatment plants: a case study of Denizli/Turkey

Journal Article

Characteristics and removal mechanism of the precursors of N-chloro-2,2-dichloroacetamide in a drinking

Journal Article

Removal of non-point pollutants from bridge runoff by a hydrocyclone using natural water head

Jianghua YU, Yeonseok KIM, Youngchul KIM

Journal Article

Occurrence and removal of selected polycyclic musks in two sewage treatment plants in Xi’an, China

Yongxiang REN, Kai WEI, Hua LIU, Guoqiang SUI, Junping WANG, Yanjun SUN, Xiaohui ZHENG

Journal Article