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EFFICIENT CONTAMINANT REMOVAL FROM LIQUID DIGESTATE OF PIG MANURE BY CHEMICAL PRECIPITATION AND CO MINERALIZATION

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 3,   Pages 479-491 doi: 10.15302/J-FASE-2023480

Abstract:

● LFD was treated by fly ash-based chemical precipitation and CO

Keywords： anaerobic digestion     chemical oxygen demand     fly ash     ion removal     total phosphate    

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Modification of the activated sludge model for chemical dosage

Shuai MA,Siyu ZENG,Xin DONG,Jining CHEN,Gustaf OLSSON

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 4,   Pages 694-701 doi: 10.1007/s11783-014-0732-3

Abstract: Full-scale experiments have been carried out to adapt the activated sludge model ASM2d to include the influence of metal dosage (Fe and Al ) for phosphorus removal. Phosphorus removal rates, nitrification rates, as well as pH and sludge settling performance, were evaluated as functions of the metal dosages. Furthermore, models relating certain parameters to the dosage of chemicals have been derived. Corresponding parameters in the ASM2d and the secondary settler models, included in the Benchmark Simulation Model No 1 (BSM1), have been modified to take the metal influence into consideration. Based on the effluent limits and penalty policy of China, an equivalent evaluation method was derived for the total cost assessment. A large number of 300-day steady-state and 14-day open-loop dynamic simulations were performed to demonstrate the difference in behavior between the original and the modified BSM1. The results show that 1) both in low and high mole concentrations, Fe addition results in a higher phosphorus removal rate than Al ; 2) the sludge settling velocity will increase due to the metal addition; 3) the respiration rate of the activated sludge is decreased more by the dosage of Al than Fe ; 4) the inhibition of Al on the nitrification rate is stronger than that of Fe ; 5) the total operating cost will reach the minimum point for smaller dosages of Fe , but always increase with Al addition.

Keywords： chemical precipitation     benchmark simulation model     phosphorus removal     respiratory rate     sludge settling    

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Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0840-3

Abstract: We modeled the impact of haze radiative effects on precipitation in North China.Convection was the key factor that whether precipitation was enhanced or suppressed.Precipitation was often suppressed where CAPE, RH and updraft velocities were high.The convection was stronger over places with precipitation enhancement over 30 mm.water vapor to rise to a higher level and thus further suppressed precipitation.

Keywords： Haze     Aerosol radiative effects     Convective precipitation    

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Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the

Lin LUO, Zhongjing WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 5,   Pages 756-768 doi: 10.1007/s11783-013-0563-7

Abstract: High temporal resolution precipitation (timescales between 1 and 4 h) data from the June to Septemberand significance of monotonic trends, and to find the change points in the mean and variance of the precipitationResults show that although the total amount of precipitation has slightly increased, the average rainfallThe study indicates that changes in hourly precipitation may be responsible for the sharp reduction of

Keywords： precipitation intensity     Mann-Kendall rank statistic     spatial and temporal distribution     climatic change    

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Evaluation of precipitation behavior of zirconium molybdate hydrate

Liang ZHANG, Masayuki TAKEUCHI, Tsutomu KOIZUMI, Izumi HIRASAWA

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 1,   Pages 65-71 doi: 10.1007/s11705-013-1314-9

Abstract: In the dissolution step of spent nuclear fuel, there is a world-concern problem that zirconium molybdate hydrate precipitates as a byproduct, and accumulates in some reprocessing equipments. In order to prevent this accumulation, we have developed a new method based on the controlled reaction crystallization of zirconium molybdate hydrate (ZMH) in the reprocessing solution, followed by solid liquid separation. In order to measure the particle size of ZMH, batch crystallization experiments were conducted by varying nitric acid concentration and operating temperature. In result, almost all particle sizes scatter around 1 μm on average, despite the higher concentration of nitric aid and operating temperature, and then small particles grow up as an aggregate sticking to the crystallizer. Moreover, polymorph and color changing were observed by varying the concentration of nitric acid and reaction time. These results suggest that crystal color and adhesiveness are closely related to the particle size of ZMH. And the control of nitric acid concentration and small particle growth would be the useful technique to prevent the ZMH sticking.

Keywords： spent nuclear fuel     zirconium molybdate hydrate     cleaning method     accumulation    

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of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent extraction-precipitation

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 902-912 doi: 10.1007/s11705-019-1887-z

Abstract: environmentally friendly method was developed to recover valuable metals by using a solvent extraction-precipitationFor the precipitation process, 91.05% of manganese was recovered as MnCO which meets the III grade standard

Keywords： high-manganese containing vanadium wastewater     solvent extraction     carbonate precipitation     vanadium titano-magnetite    

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LiFePO/C cathode materials synthesized by co-precipitation and microwave heating

XU Yunlong, TAO Lili, MA Hongyan, HUANG Huaqing

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 4,   Pages 422-427 doi: 10.1007/s11705-008-0082-4

Abstract: LiFePO/C cathode materials were synthesized by a combination of co-precipitation and microwave heating

Keywords： polyethylene     electrochemical performance     combination     co-precipitation     diffraction    

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CLIMATE-CHANGE-INDUCED TEMPORAL VARIATION IN PRECIPITATION INCREASES NITROGEN LOSSES FROM INTENSIVE CROPPING

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 3,   Pages 457-464 doi: 10.15302/J-FASE-2022452

Abstract: ListItem>

● A simple model was used to evaluate how increasing temporal variability in precipitation

Keywords： crop yield     fertilizer timing     nitrogen loss     precipitation variability     toy model    

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TRMM satellite onboard instruments and the application on precipitation analysis of their measurements

Fu Yunfei,Liu Qi,Wang Yu,Sun Liang,Li Rui,Ma Ming,Liu Guosheng

Strategic Study of CAE 2012, Volume 14, Issue 10,   Pages 43-50

Abstract: style="text-align: justify;">The method of satellite infrared and passive microwave remote sensing for precipitationAs for example, precipitation structure, relationship among altitude of cloud top and rain top with surfacerain rate for a summer hot convective precipitation system were brought forth together with analyzingof long time dataset of the TRMM precipitation radar on precipitation climatology in Asia.At last, theprospect of the satellite active and passive remote sensing of precipitation in the near future were

Keywords： TRMM     precipitation radar     microwave imager     spectrum     precipitation    

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Separation of 1,3-propanediol from glycerol-based fermentations of Klebsiella pneumoniae by alcohol precipitation

GAO Sujun, SUN Yaqin, XIU Zhilong

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 202-207 doi: 10.1007/s11705-007-0037-1

Abstract: The influences of pH and water content in condensed broth on alcohol precipitation and dilution crystallizationThe experimen tal results indicated that alcohol precipitation and dilution crystallization was feasible
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Combined Fenton process and sulfide precipitation for removal of heavy metals from industrial wastewater

Huosheng Li, Hongguo Zhang, Jianyou Long, Ping Zhang, Yongheng Chen

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 4, doi: 10.1007/s11783-019-1130-7

Abstract:

Addition of alkali to pH 10 is effective for precipitation of precipitable

Sulfide precipitation is a final step for removal

Keywords： Thallium     Pilot     Fenton     Sulfide precipitation     Heavy metal     Industrial wastewater    

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Preparation of ultrafine α-AlO using precipitation-azeotropic distillation method

XIAO Jin, QIN Qi, ZHOU Feng, CHEN Yanbin, WAN Ye

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 226-231 doi: 10.1007/s11465-008-0029-y

Abstract: Ammonium aluminum carbonate hydroxide (AACH) was prepared by a precipitation-azeotropic distillation

Keywords： calcination temperature     spherical     AACH     carbonate hydroxide     ammonium carbonate    

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Numerical investigation of the influence of kinetics and shape factor on barium sulfate precipitation

Zheng WANG, Zai-Sha MAO, Chao YANG, Qinghua ZHANG, Jingcai CHENG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3,   Pages 272-281 doi: 10.1007/s11705-009-0023-x

Abstract: The effect of kinetics and shape factor on barium sulfate precipitation in a continuous stirred tank

Keywords： stirred tank     numerical simulation     precipitation     shape factor     crystal kinetics    

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Precipitation study of CO

Siming Chen, Yue Wu, Geoffrey W. Stevens, Guoping Hu, Wenshou Sun, Kathryn A. Mumford

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 415-424 doi: 10.1007/s11705-019-1882-4

Abstract: reflectance measurement (FBRM) and C nuclear magnetic resonance ( C NMR) analysis were used to study the precipitationThree solid-liquid-liquid phases were formed during the precipitation process.carbamate and potassium bicarbonate was precipitated from CO -saturated KGLY solution with the maximum precipitation

Keywords： crystallization     precipitation     glycinate     FBRM     13C NMR    

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Effect of wastewater composition on the calcium carbonate precipitation in upflow anaerobic sludge blanket

Shucheng YANG, Yanling HE, Charles CHOU, Pengxiang ZHANG, Dongqi WANG, Yonghong LIU,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 2,   Pages 142-149 doi: 10.1007/s11783-010-0026-3

Abstract: The aim of this paper is to study the effect of wastewater composition on calcium carbonate precipitationThe results indicated that substrates had significant influence on the location of calcium carbonate precipitationMoreover, the location of calcium carbonate precipitation substantially affected the specific methanogenic, the SMA of the carbohydrate-degrading biogranules was not adversely affected by calcium carbonate precipitation

Keywords： calcium carbonate     precipitation     anaerobic granular sludge     wastewater composition     microstructure     upflow    

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Title Author Date Type Operation

EFFICIENT CONTAMINANT REMOVAL FROM LIQUID DIGESTATE OF PIG MANURE BY CHEMICAL PRECIPITATION AND CO MINERALIZATION

Journal Article

Modification of the activated sludge model for chemical dosage

Shuai MA,Siyu ZENG,Xin DONG,Jining CHEN,Gustaf OLSSON

Journal Article

Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Journal Article

Changes in hourly precipitation may explain the sharp reduction of discharge in the middle reach of the

Lin LUO, Zhongjing WANG

Journal Article

Evaluation of precipitation behavior of zirconium molybdate hydrate

Liang ZHANG, Masayuki TAKEUCHI, Tsutomu KOIZUMI, Izumi HIRASAWA

Journal Article

of vanadium and manganese from high-manganese containing vanadium wastewater by a solvent extraction-precipitation

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Journal Article

LiFePO/C cathode materials synthesized by co-precipitation and microwave heating

XU Yunlong, TAO Lili, MA Hongyan, HUANG Huaqing

Journal Article

CLIMATE-CHANGE-INDUCED TEMPORAL VARIATION IN PRECIPITATION INCREASES NITROGEN LOSSES FROM INTENSIVE CROPPING

Journal Article

TRMM satellite onboard instruments and the application on precipitation analysis of their measurements

Fu Yunfei,Liu Qi,Wang Yu,Sun Liang,Li Rui,Ma Ming,Liu Guosheng

Journal Article

Separation of 1,3-propanediol from glycerol-based fermentations of Klebsiella pneumoniae by alcohol precipitation

GAO Sujun, SUN Yaqin, XIU Zhilong

Journal Article

Combined Fenton process and sulfide precipitation for removal of heavy metals from industrial wastewater

Huosheng Li, Hongguo Zhang, Jianyou Long, Ping Zhang, Yongheng Chen

Journal Article

Preparation of ultrafine α-AlO using precipitation-azeotropic distillation method

XIAO Jin, QIN Qi, ZHOU Feng, CHEN Yanbin, WAN Ye

Journal Article

Numerical investigation of the influence of kinetics and shape factor on barium sulfate precipitation

Zheng WANG, Zai-Sha MAO, Chao YANG, Qinghua ZHANG, Jingcai CHENG

Journal Article

Precipitation study of CO

Siming Chen, Yue Wu, Geoffrey W. Stevens, Guoping Hu, Wenshou Sun, Kathryn A. Mumford

Journal Article

Effect of wastewater composition on the calcium carbonate precipitation in upflow anaerobic sludge blanket

Shucheng YANG, Yanling HE, Charles CHOU, Pengxiang ZHANG, Dongqi WANG, Yonghong LIU,

Journal Article