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Aerobic granular sludge formation based on substrate availability: Effects of flow pattern and fermentation

Quan Yuan, Hui Gong, Hao Xi, Kaijun Wang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-020-1226-0

Abstract: The influences of flow patterns (mixed-flow and plug-flow) and fermentation pretreatment on aerobic granularinvestigated by running four identical laboratory-scale sequencing batch reactors (R1–R4), comparing two anaerobicfeeding strategies and three kinds of substrates.R1 achieved faster granulation with a fast influent fill step followed by a modified anaerobic mixed-flowThe anaerobic plug-flow feeding mode (with influent fed slowly from the bottom) in R2 provided deeper

Keywords： Anaerobic plug-flow feeding mode     Anaerobic mixed-flow mode     Fermentation pretreatment     Substrate gradient    

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Organic and inorganic phosphorus uptake by bacteria in a plug-flow microcosm

Jinbo ZHAO, Xuehua LIU

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 2,   Pages 173-184 doi: 10.1007/s11783-013-0494-3

Abstract: Phosphorus (P) is a vital nutrient for sustaining natural water productivity. Both particulate and dissolved forms of organic and inorganic P are potentially important sources of bioavailable P for primary and secondary producers. A microcosm system to imitate the bacterial community in Plym river sediment and pore water is described and bacterial uptake rates for inorganic and organic phosphorus are presented in this paper. The aim of this study was to investigate the uptake of two organic phosphorus compounds (phytic acid and D-glucose-6-phosphate) by freshwater bacteria. The bioreactors comprise glass columns packed with two types of small glass beads on which bacterial biofilm can develop. The glass beads with different porosity were introduced to simulate River SPM. The selected P compounds spiked into the inflow of the microcosm, and measured the step change of P concentration in the outflow to investigate the behavior of bacterial uptake of nutrients. The results showed that organic phosphorus was converted into inorganic phosphorus but the conversion rate depended on the type of phosphorus species. One experiment suggested that phytic acid (refractory) could displace phosphate from the biofilm surface; the other experiment showed that D-glucose-6-phosphate (labile) could be hydrolysed and utilized easily by the bacteria. The results also suggested that bacteria might break down the C-P bonds to utilize the carbon. Further experiments should investigate the effect of varying the C:N:P ratio in the microcosm system to determine which nutrient limits bacteria uptake.

Keywords： organic phosphorus     bacteria     uptake    

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Feasibility assessment of up-flow anaerobic sludge blanket treatment of sulfamethoxazole pharmaceutical

Yi Chen, Shilong He, Mengmeng Zhou, Tingting Pan, Yujia Xu, Yingxin Gao, Hengkang Wang

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 5, doi: 10.1007/s11783-018-1069-0

Abstract:

The UASB system successfully treated sulfamethoxazole pharmaceutical wastewater.

High concentration sulfate of this wastewater was the main refractory factor.

UASB recovery performance after a few days of inflow arrest was studied.

The optimal UASB operating conditions for practical application were determined.

Keywords： Up-flow anaerobic sludge blanket (UASB)     Methane production     Sulfate reduction     Sulfamethoxazole pharmaceuticalwastewater     Electron flow     Recovery    

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Anaerobic treatment of wastewater containing methanol in up-flow anaerobic sludge bed (UASB) reactor

LIN Yishan, HE Yanling, MENG Zhuo, YANG Shucheng

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 241-246 doi: 10.1007/s11783-008-0040-x

Abstract: The direct conversion of methanol into methane is the main process in anaerobic treatment of methanolproduced from methanol theoretically, which may probably result in an abrupt pH drop and deteriorate the anaerobicTherefore, it is interesting to know what would really happen in an anaerobic reactor treating methanolIn this study, an up-flow anaerobic sludge bed (UASB) reactor treating methanol wastewater was operatedThe results showed that the anaerobic reactor could be operated steadily at as low as 119 mg/L of influent

Keywords： homogeneous     spherical     influent alkalinity     process     anaerobic treatment    

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Deciphering the effect of sodium dodecylbenzene sulfonate on up-flow anaerobic sludge blanket treatment

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1385-z

Abstract:

• UASB reactor can work efficiently with high COD/SO42- ratios when SDBS exists.

Keywords： Up-flow anaerobic sludge blanket     Organic sulfur     Sodium dodecylbenzene sulfonate     COD/SO4    

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Cumulant-based correlated probabilistic load flow considering photovoltaic generation and electric vehicle

Nitesh Ganesh BHAT, B. Rajanarayan PRUSTY, Debashisha JENA

Frontiers in Energy 2017, Volume 11, Issue 2,   Pages 184-196 doi: 10.1007/s11708-017-0465-7

Abstract: This paper applies a cumulant-based analytical method for probabilistic load flow (PLF) assessment inIn the case of distribution systems, the uncertainties pertaining to plug-in hybrid electric vehicle

Keywords： battery electric vehicle     extended cumulant method     photovoltaic generation     plug-in hybrid electric vehicle     probabilistic load flow    

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Technical measures to achieve a cleaner production mode for recycled paper mills

Chao HE, Zhaolin GU, Shucheng YANG, Jidong LIANG, Weina DAI, Yanling HE

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 4,   Pages 466-474 doi: 10.1007/s11783-010-0242-x

Abstract: Anaerobic technology plays an important role in the WLPI method to lower cost, energy use and waste.Power saving using anaerobic technology is 70% when recycled water is used in comparison with the conventionalof the initial process due to reuse of the waste sludge and the lower bio-sludge production of the anaerobic

Keywords： water reuse     zero discharge     anaerobic treatment     recycled paper     cleaner production    

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Full lifetime cost analysis of battery, plug-in hybrid and FCEVs in China in the near future

Zhihua CAI, Xunmin OU, Qian ZHANG, Xiliang ZHANG

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 107-111 doi: 10.1007/s11708-012-0182-1

Abstract: This paper analyzes the full lifetime cost of battery electric vehicles (BEVs), plug-in hybrid electric

Keywords： electric vehicle (EV)     life time cost     China    

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Influence of glucose feeding on the ligninolytic enzyme production of the white-rot fungus Phanerochaete

ZHOU Xiaoyan, WEN Xianghua, FENG Yan

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 1,   Pages 89-94 doi: 10.1007/s11783-007-0017-1

Abstract: The present work studied the influence of glucose feeding on the ligninolytic enzyme production of inThe results showed that 2 g/L glucose feeding on the first day of the culture (24 h after the inoculationmanganese peroxidase (MnP) activity was 2.5 times greater than that produced in cultures without glucose feedingFurthermore, the glucose feeding mode in fed-batch culture was also investigated.Compared to cultures with glucose feeding every 48 h, cultures with glucose feeding of 1.5 g/L (final

Keywords： enzyme production     fed-batch culture     nitrogen-limited     inoculation     mmol/L    

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Laminar-to-Turbulence Transition Revealed Through a Reynolds Number Equivalence Article

Xiao Dong Chen

Engineering 2019, Volume 5, Issue 3,   Pages 576-579 doi: 10.1016/j.eng.2018.09.013

Abstract:

Flow transition from laminar to turbulent mode (and vice versa)—that is, the initiation of turbulenceEven for pipe flow, predicting the onset of turbulence requires sophisticated instrumentation and/ordirect numerical simulation, based on observing the instantaneous flow structure formation and evolutionFor pipe flow, ≈ 25, and for plate flow

Keywords： Local Reynolds number equivalence     Flow transition from laminar to turbulent mode     Universal law of thewall     Pipe flow     Plate flow     Modeling    

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Sustainable intensification of agriculture is key to feeding Africa in the 21st century

Shenggen FAN

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 4,   Pages 366-370 doi: 10.15302/J-FASE-2020342

Abstract:

Africa in facing numerous challenges in the 21st century in feeding its rapidly increasing population

Keywords： Africa     sustainable intensification     Agricultural Green Development     climate change     malnutrition    

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Study and Application of Steady Flow and Unsteady Flow Mathematical Model for Canal Networks

Zhang Mingliang,Shen Yongming

Strategic Study of CAE 2007, Volume 9, Issue 8,   Pages 92-96

Abstract:

Based on Preissmann implicit scheme for one-dimensional Saint-Venant Equation,  the mathematical model for one- dimensional river networks and canal networks is developed and the key issues on the model are expatiated particularly in this paper.  This model is applied to simulating the tree-type irrigation canal networks and complex looped canal networks.  The results of levels and flows and discharge distribution between the branches agree with the data from Adlul.  This model is a simple and practical tool for water resource regulation of irrigation canal networks and river networks.  These results show the application value of this model is to set up ecological numerical model of water quality in river networks and canal networks.

Keywords： Preissmann implicit scheme     canal networks and river networks     discharge distribution     water quality mode    

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Anefficient quadrature demodulator for medical ultrasound imaging

Hao ZHOU,Yin-fei ZHENG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 301-310 doi: 10.1631/FITEE.1400205

Abstract: In this paper, we propose an efficient quadrature demodulation method for B-mode and color flow imagingIn the in vivo color flow imaging experiments, the time of the demodulation process was 5.66 ms and 3.36

Keywords： B-mode ultrasound imaging     Color flow imaging     Quadrature demodulation     Finite impulse response filter    

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Calculation for the Cross Section Size of Flue Collector of Master-Slave mode Discharging System

Huang Rui,Yang Lizhong,Fan Weicheng

Strategic Study of CAE 2001, Volume 3, Issue 11,   Pages 45-48

Abstract:

Flue collector of master-slave mode discharging system in domicile kitchen can be taken as one dimensionalvertical steady flow with friction.calculation of the distributional condition of the physical parameter of mobile phase and particle phase of flow, it can ascertain the flow condition of particle phase and further decide the discharging condition

Keywords： multiphase flow     master-slave mode discharging flue in kitchen     calculating model    

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Dissolved methane in anaerobic effluent: Emission or recovery?

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-022-1537-4

Abstract: Various anaerobic processes have been explored for the energy-efficient treatment of municipal wastewaterHowever, dissolved methane in anaerobic effluent appears to be a barrier towards the energy and carbon

Keywords： Anaerobic treatment     Municipal wastewater     Dissolved methane     Methane recovery     Carbon emission    

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Title Author Date Type Operation

Aerobic granular sludge formation based on substrate availability: Effects of flow pattern and fermentation

Quan Yuan, Hui Gong, Hao Xi, Kaijun Wang

Journal Article

Organic and inorganic phosphorus uptake by bacteria in a plug-flow microcosm

Jinbo ZHAO, Xuehua LIU

Journal Article

Feasibility assessment of up-flow anaerobic sludge blanket treatment of sulfamethoxazole pharmaceutical

Yi Chen, Shilong He, Mengmeng Zhou, Tingting Pan, Yujia Xu, Yingxin Gao, Hengkang Wang

Journal Article

Anaerobic treatment of wastewater containing methanol in up-flow anaerobic sludge bed (UASB) reactor

LIN Yishan, HE Yanling, MENG Zhuo, YANG Shucheng

Journal Article

Deciphering the effect of sodium dodecylbenzene sulfonate on up-flow anaerobic sludge blanket treatment

Journal Article

Cumulant-based correlated probabilistic load flow considering photovoltaic generation and electric vehicle

Nitesh Ganesh BHAT, B. Rajanarayan PRUSTY, Debashisha JENA

Journal Article

Technical measures to achieve a cleaner production mode for recycled paper mills

Chao HE, Zhaolin GU, Shucheng YANG, Jidong LIANG, Weina DAI, Yanling HE

Journal Article

Full lifetime cost analysis of battery, plug-in hybrid and FCEVs in China in the near future

Zhihua CAI, Xunmin OU, Qian ZHANG, Xiliang ZHANG

Journal Article

Influence of glucose feeding on the ligninolytic enzyme production of the white-rot fungus Phanerochaete

ZHOU Xiaoyan, WEN Xianghua, FENG Yan

Journal Article

Laminar-to-Turbulence Transition Revealed Through a Reynolds Number Equivalence

Xiao Dong Chen

Journal Article

Sustainable intensification of agriculture is key to feeding Africa in the 21st century

Shenggen FAN

Journal Article

Study and Application of Steady Flow and Unsteady Flow Mathematical Model for Canal Networks

Zhang Mingliang,Shen Yongming

Journal Article

Anefficient quadrature demodulator for medical ultrasound imaging

Hao ZHOU,Yin-fei ZHENG

Journal Article

Calculation for the Cross Section Size of Flue Collector of Master-Slave mode Discharging System

Huang Rui,Yang Lizhong,Fan Weicheng

Journal Article

Dissolved methane in anaerobic effluent: Emission or recovery?

Journal Article