Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/2
Dezhi Shi, Chao Zhang Chunyan Hu Jinlu Zhang, Pengfei Li
Resource recovery of municipal solid waste (MSW) incinerator fly ash is widely concerned. Tobermorite, an important but rare naturally mineral, could not be directly hydrothermal synthesized from it owing to its high content of Ca but low concentration of Si and Al. The selected external silicon-aluminum additives including coal fly ash (CFA), bentonite, kaolin and diatomite were solely or combined added. With the addition of 30% mass composite additive in which the ratio of quality for CFA and diatomite is 1:1, tobermorite could be synthesized most effectively in 48h at 150°C, mainly attributing to the proper element proportion adjusted by additives. Tobermorite seed added could not only promote the large formation of tobermorite, but also inhibit the production of hibschite and kaotoite. Since Ca/(Si + Al) = 1.20 and Al/(Si + Al) = 0.20, addition of 30% mass of composite additive and 3% mass of tobermorite seed would be the recommended technological parameter.
{"title":"Seed-induced Hydrothermal Synthesis of Tobermorite from Municipal Solid Waste Incinerator Fly Ash","authors":"Dezhi Shi, Chao Zhang Chunyan Hu Jinlu Zhang, Pengfei Li","doi":"10.12783/ISSN.1544-8053/14/S1/2","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/2","url":null,"abstract":"Resource recovery of municipal solid waste (MSW) incinerator fly ash is widely concerned. Tobermorite, an important but rare naturally mineral, could not be directly hydrothermal synthesized from it owing to its high content of Ca but low concentration of Si and Al. The selected external silicon-aluminum additives including coal fly ash (CFA), bentonite, kaolin and diatomite were solely or combined added. With the addition of 30% mass composite additive in which the ratio of quality for CFA and diatomite is 1:1, tobermorite could be synthesized most effectively in 48h at 150°C, mainly attributing to the proper element proportion adjusted by additives. Tobermorite seed added could not only promote the large formation of tobermorite, but also inhibit the production of hibschite and kaotoite. Since Ca/(Si + Al) = 1.20 and Al/(Si + Al) = 0.20, addition of 30% mass of composite additive and 3% mass of tobermorite seed would be the recommended technological parameter.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79118649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.14355/jrst.2017.1403.063
Huaqiong Liu, Dongdong Jiang, L. Pretorius
This paper analyses the current transportation requirements and product quality assurance in the cold chain logistics industry. It proposes the idea of drop-and-pull transportation, based on one vehicle with multi-temperature control, namely the standard cold-container system. It further elaborates on the advantages of the standard cold-container system, which improves transportation efficiency, while greatly cutting down costs at the same time.
{"title":"Research on the Standardised Cold-container System Based on One Vehicle with Multi-Temperature Control","authors":"Huaqiong Liu, Dongdong Jiang, L. Pretorius","doi":"10.14355/jrst.2017.1403.063","DOIUrl":"https://doi.org/10.14355/jrst.2017.1403.063","url":null,"abstract":"This paper analyses the current transportation requirements and product quality assurance in the cold chain logistics industry. It proposes the idea of drop-and-pull transportation, based on one vehicle with multi-temperature control, namely the standard cold-container system. It further elaborates on the advantages of the standard cold-container system, which improves transportation efficiency, while greatly cutting down costs at the same time.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73643903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/1
G. Singh, S. Kumar, Kaushal Kumar
In present work, an attempt has been made to improve the quality of bottom ash for utilization as a pozzolanic material. All samples were crushed and passed through 250 µm sieve to prepare grounded bottom ash. The physio-chemical, mineral and leaching characteristics of original and grounded bottom ash were studied. Results show that specific gravity and bulk density of all sample increases whereas porosity, water holding capacity and loss of ignition decreases after the grounding the bottom ash. Pozzolanic properties of bottom ash also improved after grounding the ash samples which helps to commercialize its utilization and reduce environmental impact.
{"title":"Comprehensive Characterization of Grounded Bottom Ash from Indian Thermal Power Plant","authors":"G. Singh, S. Kumar, Kaushal Kumar","doi":"10.12783/ISSN.1544-8053/14/1/1","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/1","url":null,"abstract":"In present work, an attempt has been made to improve the quality of bottom ash for utilization as a pozzolanic material. All samples were crushed and passed through 250 µm sieve to prepare grounded bottom ash. The physio-chemical, mineral and leaching characteristics of original and grounded bottom ash were studied. Results show that specific gravity and bulk density of all sample increases whereas porosity, water holding capacity and loss of ignition decreases after the grounding the bottom ash. Pozzolanic properties of bottom ash also improved after grounding the ash samples which helps to commercialize its utilization and reduce environmental impact.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"60 6 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90691343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/1/42
Wang Huigai, Zhang Keke, Z. Jianxin
The effect of multiple solution and aging treatment on microstructures and room-mechanical properties of Ti-53 alloy is studied by OM, SEM and universal material testing machine. The results show that the quantity of secondary α lamella, hardness, strength, and plasticity of Ti-53 alloy decrease after the peak value with the cycling times of multiple solution and aging treatment increasing. In the process of double solid solution aging treatment, the numerical values of room-mechanical properties reached the highest level. Multiple solution and aging treatment modulates morphology effectively, which can make martensite lamellas with different Berlese’s vectors merge or decompose. Therefore, the excellent match of strength and plasticity can be obtained.
{"title":"Multiple Solution and Aging Treatment Technology Improves Microstructures and Properties of Ti53 Alloy","authors":"Wang Huigai, Zhang Keke, Z. Jianxin","doi":"10.12783/issn.1544-8053/14/1/42","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/1/42","url":null,"abstract":"The effect of multiple solution and aging treatment on microstructures and room-mechanical properties of Ti-53 alloy is studied by OM, SEM and universal material testing machine. The results show that the quantity of secondary α lamella, hardness, strength, and plasticity of Ti-53 alloy decrease after the peak value with the cycling times of multiple solution and aging treatment increasing. In the process of double solid solution aging treatment, the numerical values of room-mechanical properties reached the highest level. Multiple solution and aging treatment modulates morphology effectively, which can make martensite lamellas with different Berlese’s vectors merge or decompose. Therefore, the excellent match of strength and plasticity can be obtained.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"74 1","pages":"357-362"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88516472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/18
Xiao-Fei Wang, G. Deng, Juan Yin
Heavy metal contaminations to farmland soil is a common threaten to crop yield and food safety, phytoremediation with economic plants with high bio-accumulation is a sustainable approach to recover polluted farmland. As a high ethanol yield crop, sugarcane has attracted increasing industrial interest as a raw material for biofuel and the risk of heavy metal in it is negligible if the sugar produced is to be fermented into ethanol rather than by consumed. This study is to do a preliminary investigation if sugarcane is a suitable crop for phytoremediation in heavy metal polluted farmland in a context of geographic conditions in southern China, thirty-eight soil and sugarcane samples were collected in five villages in a typical agricultural county called Huangjiang which is located in the Huanjiang River Basin in Guangxi province. Sugarcane is widely cultivated in Huangjiang as one of the major economic crops, meanwhile, pollutions induced by mining and ore-extraction in this area has resulted in heavy metals entering the farmland soils. Samples collected were used to assess the correlation of the level of heavy metals in the soil, and their concentrations in roots, sections of stems and leaves. Seven heavy metals were selected in this study and the results showed that most of the toxic heavy metals intake by sugarcane accumulated in the roots, while only a small portion is transferred to the stems and leaves. The study initially outlined sugarcane as a potential candidate for phytoremediation in farmland polluted by heavy metals with economic motivate in this subtropical geographical background.
{"title":"Heavy Metals in Soil and Sugarcane Accumulation in Agricultural Area along Huanjiang River in Guangxi, China","authors":"Xiao-Fei Wang, G. Deng, Juan Yin","doi":"10.12783/ISSN.1544-8053/14/1/18","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/18","url":null,"abstract":"Heavy metal contaminations to farmland soil is a common threaten to crop yield and food safety, phytoremediation with economic plants with high bio-accumulation is a sustainable approach to recover polluted farmland. As a high ethanol yield crop, sugarcane has attracted increasing industrial interest as a raw material for biofuel and the risk of heavy metal in it is negligible if the sugar produced is to be fermented into ethanol rather than by consumed. This study is to do a preliminary investigation if sugarcane is a suitable crop for phytoremediation in heavy metal polluted farmland in a context of geographic conditions in southern China, thirty-eight soil and sugarcane samples were collected in five villages in a typical agricultural county called Huangjiang which is located in the Huanjiang River Basin in Guangxi province. Sugarcane is widely cultivated in Huangjiang as one of the major economic crops, meanwhile, pollutions induced by mining and ore-extraction in this area has resulted in heavy metals entering the farmland soils. Samples collected were used to assess the correlation of the level of heavy metals in the soil, and their concentrations in roots, sections of stems and leaves. Seven heavy metals were selected in this study and the results showed that most of the toxic heavy metals intake by sugarcane accumulated in the roots, while only a small portion is transferred to the stems and leaves. The study initially outlined sugarcane as a potential candidate for phytoremediation in farmland polluted by heavy metals with economic motivate in this subtropical geographical background.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"50 1","pages":"143-154"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77850799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/1/7
Guang-sheng Chen, Xinhai Li Yukun Xu Lifeng Jiao, Rong Hu
It is an important content to analyze the uncertainty of emission from greenhouse gases in compiling the emission inventory. Reliable uncertainty estimates can also be used to increase the quality of emission inventories. This paper took the emission of CH4 from the solid waste landfill in Hefei City in 2014 as an example, and employed the mass balance method to compute its emission. Monte Carlo method was used to carry out the sensitivity analysis and compute uncertainty. Through computing, 95% confidence interval of CH4 emission from landfill in Hefei City was (1.89~3.40) × 104 t. The mean value was 2.61 × 104 t with uncertainty range of –27.59%~30.27%. Among all the parameters, the decomposable proportion of DOC (DOCf ) showed the greatest impact on the emission of CH4 from the landfill and its contribution to emission result was 26.33%. Followed by the degradable organic carbon (DOC) was 26.29%, the amount of solid waste (MSW) was 13.63%, methane correction factor (MCF) was 6.93% and the proportion of methane in landfill gas (F) was 6.58%. The results showed that compared with traditional error propagation method, it improved the accuracy and quality of assessment and provided a scientific basis to improve the quality of inventory as well.
{"title":"Uncertainty Analysis for Evaluating CH4 Emission from Solid Waste Landfill of Hefei City Based on Monte Carlo Method","authors":"Guang-sheng Chen, Xinhai Li Yukun Xu Lifeng Jiao, Rong Hu","doi":"10.12783/issn.1544-8053/14/1/7","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/1/7","url":null,"abstract":"It is an important content to analyze the uncertainty of emission from greenhouse gases in compiling the emission inventory. Reliable uncertainty estimates can also be used to increase the quality of emission inventories. This paper took the emission of CH4 from the solid waste landfill in Hefei City in 2014 as an example, and employed the mass balance method to compute its emission. Monte Carlo method was used to carry out the sensitivity analysis and compute uncertainty. Through computing, 95% confidence interval of CH4 emission from landfill in Hefei City was (1.89~3.40) × 104 t. The mean value was 2.61 × 104 t with uncertainty range of –27.59%~30.27%. Among all the parameters, the decomposable proportion of DOC (DOCf ) showed the greatest impact on the emission of CH4 from the landfill and its contribution to emission result was 26.33%. Followed by the degradable organic carbon (DOC) was 26.29%, the amount of solid waste (MSW) was 13.63%, methane correction factor (MCF) was 6.93% and the proportion of methane in landfill gas (F) was 6.58%. The results showed that compared with traditional error propagation method, it improved the accuracy and quality of assessment and provided a scientific basis to improve the quality of inventory as well.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"15 1","pages":"51-57"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78285951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/34
Chunyang Li, Guojun Li, R. Ren
The dense and oriented BaTi2O5 (BT2) in a single phase was successfully obtained by an arc melting process on a water-cooled copper plate using BaCO3 and TiO2 as starting materials and B2O3 as an additive. XRD pattern of BT2 showed a preferred orientation of (020). The microstructure of BT2 was examined to show a needle-like shape and the BT2 grains were 3~15 µm in diameters and 22~110 µm in lengths. Though B2O3 was effective to prepare dense BT2, it, disadvantageously, tended to decrease the permittivity of BT2. The discrepancy of the peak frequencies between Z″ and M″ could be ascribed to the existence of structural defects and occurrence of the second phase. The maximum permittivity was 863 when the frequency (f) and the Curie temperature (Tc) were 100 kHz and 465°C, respectively.
{"title":"Preparation of the Oriented Polycrystalline BaTi2O5 Ferroelectric Ceramics","authors":"Chunyang Li, Guojun Li, R. Ren","doi":"10.12783/ISSN.1544-8053/14/1/34","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/34","url":null,"abstract":"The dense and oriented BaTi2O5 (BT2) in a single phase was successfully obtained by an arc melting process on a water-cooled copper plate using BaCO3 and TiO2 as starting materials and B2O3 as an additive. XRD pattern of BT2 showed a preferred orientation of (020). The microstructure of BT2 was examined to show a needle-like shape and the BT2 grains were 3~15 µm in diameters and 22~110 µm in lengths. Though B2O3 was effective to prepare dense BT2, it, disadvantageously, tended to decrease the permittivity of BT2. The discrepancy of the peak frequencies between Z″ and M″ could be ascribed to the existence of structural defects and occurrence of the second phase. The maximum permittivity was 863 when the frequency (f) and the Curie temperature (Tc) were 100 kHz and 465°C, respectively.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"8 1","pages":"299-303"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76327351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/S1/10
Zhang Hongen, Shijia Ling, W. Qingyuan
This paper aims to investigate the influence of curing condition on compressive strength of low-calcium fly ash-based geopolymer concrete (FAGC) by preparing six mixtures. The results also show that the specimens cured at room temperature for one day and then cured at high temperature will be helpful to obtain materials with higher strength than that of directly cured specimens at high temperature. Additionally, cured at room temperature for one day and then cured at high temperature would weaken the adverse effect of wet curing on the growth of compressive strength.
{"title":"Influence of Curing Condition on Compressive Strength of Low-calcium Fly Ash-based Geopolymer Concrete","authors":"Zhang Hongen, Shijia Ling, W. Qingyuan","doi":"10.12783/ISSN.1544-8053/14/S1/10","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/S1/10","url":null,"abstract":"This paper aims to investigate the influence of curing condition on compressive strength of low-calcium fly ash-based geopolymer concrete (FAGC) by preparing six mixtures. The results also show that the specimens cured at room temperature for one day and then cured at high temperature will be helpful to obtain materials with higher strength than that of directly cured specimens at high temperature. Additionally, cured at room temperature for one day and then cured at high temperature would weaken the adverse effect of wet curing on the growth of compressive strength.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76893338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/ISSN.1544-8053/14/1/28
Da-jun Zhao, Sun Zihang, Yan Zhao, Xiaoshu Lü, Xianfeng Tan
Fluid field can have significant effects on corrosion rates of steels. The objective of this paper is to investigate erosion-corrosion mechanisms of J55 steel and the effects of local hydrodynamic factors, in particular, the fluid flow velocity on J55 steel’s service life. A new experimental setup was developed to specifically simulate the actual hydrodynamic conditions of Huanghe (Yellow) River valley. Computational fluid dynamics (CFD) model was adopted to characterize the hydrodynamic factors, such as the flow rate, the turbulence kinetic energy and the shear stress, and their effects on the corrosion behavior of J55 steel. Corrosion morphology was analyzed. Results show that the erosion rate increased with the flow rate and the resulting corrosion pit became smaller and deeper. Through the research results of this paper, it could provide some technical supports for the scientific and rational exploitation of brine.
{"title":"Experimental Study and Numerical Modeling of Erosion-corrosion of J55 Steel in Brine of Huanghe (Yellow) River Valley","authors":"Da-jun Zhao, Sun Zihang, Yan Zhao, Xiaoshu Lü, Xianfeng Tan","doi":"10.12783/ISSN.1544-8053/14/1/28","DOIUrl":"https://doi.org/10.12783/ISSN.1544-8053/14/1/28","url":null,"abstract":"Fluid field can have significant effects on corrosion rates of steels. The objective of this paper is to investigate erosion-corrosion mechanisms of J55 steel and the effects of local hydrodynamic factors, in particular, the fluid flow velocity on J55 steel’s service life. A new experimental setup was developed to specifically simulate the actual hydrodynamic conditions of Huanghe (Yellow) River valley. Computational fluid dynamics (CFD) model was adopted to characterize the hydrodynamic factors, such as the flow rate, the turbulence kinetic energy and the shear stress, and their effects on the corrosion behavior of J55 steel. Corrosion morphology was analyzed. Results show that the erosion rate increased with the flow rate and the resulting corrosion pit became smaller and deeper. Through the research results of this paper, it could provide some technical supports for the scientific and rational exploitation of brine.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"37 1","pages":"235-243"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84911130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-01-01DOI: 10.12783/issn.1544-8053/14/1/35
Yuanhong Ding, Jun Zhou Hongqiang Ren Yang Song Qing Wang, Y. Yang
One sample of PU synthetic wastewater was analyzed, its Total Nitrogen (TN) was mainly composed of about 300 mg/L nitrate, and three pieces of anoxic Moving Bed Bio-film Reactors (MBBR) were applied to treat it, one MBBR was run with raw wastewater, the second and third were with synthetic wastewater, and the results were as followings: TN could be removed off completely under the condition of relative low C/N ratio; the C/N ratio of removed pollutants was liner correlation with C/N ratio of influent, but the C/N ratio of effluent was increase violently, the above results demonstrated that, the external carbon source, necessary to the heterotrophic bacteria, was consumed more rapidly than nitrate nitrogen in initial denitrifying stage, then the nitrogen was utilized much more rapidly at later stage, and the ratio of C/N denitrification behaved as a chamfer linear.
{"title":"Effects of C/N Ratio on Nitrate Removal from PU Synthetic Leather Wastewater Treated by Anoxic Moving Bed Bio-film Reactors","authors":"Yuanhong Ding, Jun Zhou Hongqiang Ren Yang Song Qing Wang, Y. Yang","doi":"10.12783/issn.1544-8053/14/1/35","DOIUrl":"https://doi.org/10.12783/issn.1544-8053/14/1/35","url":null,"abstract":"One sample of PU synthetic wastewater was analyzed, its Total Nitrogen (TN) was mainly composed of about 300 mg/L nitrate, and three pieces of anoxic Moving Bed Bio-film Reactors (MBBR) were applied to treat it, one MBBR was run with raw wastewater, the second and third were with synthetic wastewater, and the results were as followings: TN could be removed off completely under the condition of relative low C/N ratio; the C/N ratio of removed pollutants was liner correlation with C/N ratio of influent, but the C/N ratio of effluent was increase violently, the above results demonstrated that, the external carbon source, necessary to the heterotrophic bacteria, was consumed more rapidly than nitrate nitrogen in initial denitrifying stage, then the nitrogen was utilized much more rapidly at later stage, and the ratio of C/N denitrification behaved as a chamfer linear.","PeriodicalId":17101,"journal":{"name":"Journal of Residuals Science & Technology","volume":"47 1","pages":"305-309"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86895968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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