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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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Experimental study of nitrite accumulation in pre-denitrification biological nitrogen removal process

WU Xuelei, CHEN Lunqiang, PENG Yongzhen, WANG Pu, WANG Yayi

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 236-240 doi: 10.1007/s11783-008-0008-x

Abstract: The effect of dissolved oxygen (DO) concentration on nitrite accumulation was investigated in a pilot-scale pre-denitrification process at room temperature for 100 days. In the first 10 days, due to the instability of the system, the DO concentration fluctuated between 1.0 and 2.0 mg/L. In the next 14 days, the DO concentration was kept at 0.5 mg/L and nitrite accumulation occurred, with the average nitrite accumulation rate at 91%. From the 25th day, the DO concentration was increased to 2.0 mg/L to destroy the nitrite accumulation, but nitrite accumulation rate was still as high as 90%. From the 38th day the nitrite accumulation rate decreased to 15%–30% linearly. From the 50th day, DO concentration was decreased to 0.5 mg/L to resume nitrite accumulation. Until the 83rd day the nitrite accumulation rate began to increase to 80%. Dissolved oxygen was the main cause of nitrite accumulation, taking into account other factors such as pH, free ammonia concentration, temperature, and sludge retention time. Because of the different affinity for oxygen between nitrite oxidizing bacteria and ammonia oxidizing bacteria when DO concentration was kept at 0.5 mg/L, nitrite accumulation occurred.
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Circulating fluidized bed biological reactor for nutrients removal

CUI Yubo, LIU Hongbo, BAI Chunxue

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 3,   Pages 349-353 doi: 10.1007/s11783-008-0051-7

Abstract: A new biological nitrogen removal process, which is named herein “The circulating fluidized bed bioreactor(CFBBR)”, was developed for simultaneous removal of nitrogen and organic matter.from the aerobic bed enters the anaerobic bed from the bottom of the anaerobic bed, completing the removalof nitrogen and organic matter.efficiencies of total nitrogen (TN) and soluble chemical oxygen demand (SCOD) were found to be 88% and

Keywords： soluble chemical     bioreactor     biological nitrogen     optimum nitrified     nitrogen removal    

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Feammox and anammox process facilitated by activated carbon as an electron shuttle for autotrophic biologicalnitrogen removal

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1498-z

Abstract:

• The autotrophic nitrogen removal combining Feammox and Anammox was

Keywords： Feammox     Anammox     Extracellular electron transfer     Electron shuttle     Activated carbon    

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Research on polyhydroxyalkanoates and glycogen transformations: Key aspects to biologic nitrogen andphosphorus removal in low dissolved oxygen systems

Hongjing LI, Yinguang CHEN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 2,   Pages 283-290 doi: 10.1007/s11783-010-0243-9

Abstract: was conducted on the effect of polyhydroxyalkanoates (PHA) and glycogen transformations on biologic nitrogenand phosphorus removal in low dissolved oxygen (DO) systems.The total nitrogen (TN) removal efficiency was 68% and 82% in SBR1 and SBR2, respectively.transformations should be taken into account as key components for optimizing anaerobic/aerobic (low DO) biologic nitrogenand phosphorus removal systems.

Keywords： low dissolved oxygen (DO)     biological nitrogen and phosphorus removal     polyhydroxyalkanoates (PHA)     glycogen    

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Practical consideration for design and optimization of the step feed process

Shijian GE, Yongzhen PENG, Congcong LU, Shuying WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 135-142 doi: 10.1007/s11783-012-0454-3

Abstract: such as the anaerobic/anoxic/oxic volumes, internal recycle ratios, and sludge retention times, for removalof chemical oxygen demanding (COD), nitrogen, and phosphorus.Results showed high removal efficiencies of COD of (85.0±1.7)%, ammonium of (99.7±0.2)%, total nitrogenorganisms (DNPAOs), accounting for approximately 39.2% of PAOs, was also greatly beneficial to the nitrogenand phosphorus removal.

Keywords： University of Cape Town (UCT)     simultaneous nitrification and denitrification (SND)     denitrifying phosphorus removal     biological nutrient removal (BNR)    

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On-line controlling system for nitrogen and phosphorus removal of municipal wastewater in a sequencing

LI Jun, NI Yongjiong, WEI Su, CHENG Guobiao, OU Changjin, PENG Yongzhen, GU Guowei, LU Jingen

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 99-102 doi: 10.1007/s11783-008-0017-9

Abstract: The objectives of this study were to establish an on-line controlling system for nitrogen and phosphorusremoval synchronously of municipal wastewater in a sequencing batch reactor (SBR).The variation of DO, ORP and pH is relevant to each phase of biological process for nitrogen and phosphorusremoval in this SBR.The controlling system can operate automatically for nitrogen and phosphorus efficiently removal.

Keywords： DO     relevant     biological process     nitrogen     pH    

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Field experiment on biological contact oxidation process to treat polluted river water in the Dianchi

Lu LI, Shuguang XIE, Hui ZHANG, Donghui WEN

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 1,   Pages 38-47 doi: 10.1007/s11783-009-0007-6

Abstract: In this study two types of biological contact oxidation processes (BCOP), a step-feed (SBCOP) unit andTN removal efficiency in the SBCOP was higher than that in the IBCOP during the winter and spring butMoreover, symbiotic algae-bacteria growth may be conducive to the removal of pollutants.

Keywords： step-feed biological contact oxidation process (SBCOP)     inter-recycle biological contact oxidation process(IBCOP)     river water     removal efficiency     nitrogen transformation     the Dianchi Lake watershed    

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Effects of mulching for water conservation on soil carbon, nitrogen and biological properties

Xiaomin PI, Tongxun ZHANG, Benhua SUN, Quanhong CUI, Yun GUO, Mingxia GAO, Hao FENG, David W. HOPKINS

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 146-154 doi: 10.15302/J-FASE-2017136

Abstract: The effect of mulching with straw, white plastic film and black plastic film for improving soil water storage and on the soil properties was examined in a wheat-maize rotation system on Loess soil in northwestern China. All the mulches improved the water storage to some extent and led to warmer soils. However, the organic C and total N contents of the soils declined significantly under the mulches, particularly the plastic film mulches, and this could have long-term detrimental effects on soil quality and the sustainability of the some mulching practices.

Keywords： biomass     carbon     mulch     nitrogen     plastic films     soil     straw     water storage    

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Overlooked nitrogen-cycling microorganisms in biological wastewater treatment

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1426-2

Abstract:

• AOA and comammox bacteria can be more abundant and active than AOB/NOB at WWTPs.

Keywords： Ammonia oxidizing archaea (AOA)     Complete ammonia oxidizing (comammox) bacteria     Dissimilatory nitrate reduction to ammonium (DNRA) bacteria     Nitrate/nitrite-dependent anaerobic methane oxidizing (NOx-DAMO) microorganisms     Engineering application    

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ROOT EXUDATES FROM CANOLA EXHIBIT BIOLOGICAL NITRIFICATION INHIBITION AND ARE EFFECTIVE IN INHIBITING

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 2,   Pages 177-186 doi: 10.15302/J-FASE-2021421

Abstract: This biological nitrification inhibition (BNI) capacity can decrease N loss and increase N uptake from

Keywords： ammonia oxidizing microorganisms / biological nitrification inhibition / farming rotations / nitrogencycling / nitrogen use efficiency    

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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 results showed that VF2-HSF2 compared to VF1-HSF1 was not only a more reliable nitrogen removal method, but also enhanced the nitrogen removal efficiency by 50%.The average apparent rate of nitrogen removal in VF2-HSF2 reached to 2.52 gN·m ·d , which doubled thePlant uptake and organic nitrogen sediment accounted for 12% and 6% of the total nitrogen removal inBiologic nitrogen removal was the dominant mechanism, which accounted for 79% and 87% of the total nitrogen

Keywords： constructed wetland     zeolite     bioregeneration     nitrogen removal    

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Advanced nitrogen and phosphorus removal in A

Jianhua WANG, Yongzhen PENG, Yongzhi CHEN

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 3,   Pages 474-480 doi: 10.1007/s11783-011-0360-0

Abstract: bigger anoxic zone and biologic aerated filter (A O-BAF) system was operated to treat low carbon-to-nitrogenThe A O process was employed mainly for organic matter and phosphorus removal, and for denitrificationaccumulating organisms (DPAOs) played an important role in removing up to 91% of phosphorus along with nitrogenwhich indicated that the suspended activated sludge process presented a good denitrifying phosphorus removalThe average removal efficiency of chemical oxygen demand (COD), total nitrogen (TN), total phosphorus

Keywords： zone and biologic aerated filter (A2O-BAF) system     domestic wastewater with low carbon-to-nitrogenratio     advanced nitrogen and phosphorus removal     denitrifying phosphorus removal    

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Methanation and chemolitrophic nitrogen removal by an anaerobic membrane bioreactor coupled partial nitrification

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 6, doi: 10.1007/s11783-023-1668-2

Abstract:

● Efficient carbon methanation and nitrogen removal was achieved in

Keywords： Anaerobic membrane bioreactor     Partial nitrification/Anammox     Carbon separation     Chemolitrophic nitrogenremoval    

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Impact of photosynthesis and transpiration on nitrogen removal in constructed wetlands

LUO Weiguo, WANG Shihe, HUANG Juan, YAN Lu, HUANG Jun

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 3,   Pages 316-319 doi: 10.1007/s11783-007-0053-x

Abstract: To determine the impact of photosynthesis and transpiration on nitrogen removal in wetlands, an artificialand hydraulic conditions, the daily changes of photosynthesis and transpiration of reeds, as well as nitrogenremoval efficiency were measured.In addition, the efficiency of water usage by reeds and nitrogen removal efficiency could be affectedby the water level in wetlands; a higher level boosts nitrogen removal efficiency.

Keywords： transpiration     Correlation coefficient     nitrogen removal     artificial wetland     impact    

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Title Author Date Type Operation

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

Experimental study of nitrite accumulation in pre-denitrification biological nitrogen removal process

WU Xuelei, CHEN Lunqiang, PENG Yongzhen, WANG Pu, WANG Yayi

Journal Article

Circulating fluidized bed biological reactor for nutrients removal

CUI Yubo, LIU Hongbo, BAI Chunxue

Journal Article

Feammox and anammox process facilitated by activated carbon as an electron shuttle for autotrophic biologicalnitrogen removal

Journal Article

Research on polyhydroxyalkanoates and glycogen transformations: Key aspects to biologic nitrogen andphosphorus removal in low dissolved oxygen systems

Hongjing LI, Yinguang CHEN

Journal Article

Practical consideration for design and optimization of the step feed process

Shijian GE, Yongzhen PENG, Congcong LU, Shuying WANG

Journal Article

On-line controlling system for nitrogen and phosphorus removal of municipal wastewater in a sequencing

LI Jun, NI Yongjiong, WEI Su, CHENG Guobiao, OU Changjin, PENG Yongzhen, GU Guowei, LU Jingen

Journal Article

Field experiment on biological contact oxidation process to treat polluted river water in the Dianchi

Lu LI, Shuguang XIE, Hui ZHANG, Donghui WEN

Journal Article

Effects of mulching for water conservation on soil carbon, nitrogen and biological properties

Xiaomin PI, Tongxun ZHANG, Benhua SUN, Quanhong CUI, Yun GUO, Mingxia GAO, Hao FENG, David W. HOPKINS

Journal Article

Overlooked nitrogen-cycling microorganisms in biological wastewater treatment

Journal Article

ROOT EXUDATES FROM CANOLA EXHIBIT BIOLOGICAL NITRIFICATION INHIBITION AND ARE EFFECTIVE IN INHIBITING

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

Advanced nitrogen and phosphorus removal in A

Jianhua WANG, Yongzhen PENG, Yongzhi CHEN

Journal Article

Methanation and chemolitrophic nitrogen removal by an anaerobic membrane bioreactor coupled partial nitrification

Journal Article

Impact of photosynthesis and transpiration on nitrogen removal in constructed wetlands

LUO Weiguo, WANG Shihe, HUANG Juan, YAN Lu, HUANG Jun

Journal Article