Pub Date : 2019-06-01DOI: 10.21608/esugj.2019.223907
Akammaa Wada, A. Gbabo, A. Umar
National Cereals Research Institute situated on Lat 09045' N, Long 6007'E at an Altitude of 70.57m above sea level has the national mandate for genetic improvement of sugar cane and five other crops. Thus, National Cereals Research Institute, Badeggi has been involved in Research and Development (R & D) of sugar cane for the past 3 and 4 decades respectively. During this period, seven indigenously bred varieties have been released for use by the Nigerian sugar industries. The research efforts on sugar have also witnessed the development of 10 tons per day (10tcd) brown sugar processing technology for cottage level sugar production. In striving to achieve these novel technologies, various stakeholders were collaborated with spanning from the Federal Government, Agencies of Governments at the Federal, state and local levels and the universities with little or no input from the Nigerian Sugar Industry. Due to some encountered deficiency in key areas for sugar cane and sugar research and production, the Institute finds imperative to seek worthy collaborators in Egypt's sugar groups in biotechnology and sugar technologies for the development of suitable varieties foe sugar and ethanol production and the time for this synergy is now. This paper highlights what NCRI has been able to archive in the past decades on sugarcanes and sugar research and areas needing urgent collaboration with relevant Egypt technocrat in sugar cane and sugar.
{"title":"Sugar Cane and Sugar Research at National Cereals Research Institute, Badeggi, Nigeria: Time for Collaboration with Egypt’s Sugar Groups","authors":"Akammaa Wada, A. Gbabo, A. Umar","doi":"10.21608/esugj.2019.223907","DOIUrl":"https://doi.org/10.21608/esugj.2019.223907","url":null,"abstract":"National Cereals Research Institute situated on Lat 09045' N, Long 6007'E at an Altitude of 70.57m above sea level has the national mandate for genetic improvement of sugar cane and five other crops. Thus, National Cereals Research Institute, Badeggi has been involved in Research and Development (R & D) of sugar cane for the past 3 and 4 decades respectively. During this period, seven indigenously bred varieties have been released for use by the Nigerian sugar industries. The research efforts on sugar have also witnessed the development of 10 tons per day (10tcd) brown sugar processing technology for cottage level sugar production. In striving to achieve these novel technologies, various stakeholders were collaborated with spanning from the Federal Government, Agencies of Governments at the Federal, state and local levels and the universities with little or no input from the Nigerian Sugar Industry. Due to some encountered deficiency in key areas for sugar cane and sugar research and production, the Institute finds imperative to seek worthy collaborators in Egypt's sugar groups in biotechnology and sugar technologies for the development of suitable varieties foe sugar and ethanol production and the time for this synergy is now. This paper highlights what NCRI has been able to archive in the past decades on sugarcanes and sugar research and areas needing urgent collaboration with relevant Egypt technocrat in sugar cane and sugar.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87847537","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 : 2018-12-01DOI: 10.21608/esugj.2018.228290
A. Zohri, Abdel-Al Gaber, Osama Ahmed, Ahmed Mohammed
Invertase enzyme from different commercial kinds of Baker’s and distillery Saccharomyces cerevisiae was isolated and partially purified as a crude enzyme by salt stress process and ethanol precipitation. The lyophilization takes place for the enzyme isolated from activated distillery S. cerevisiae. The activities of partially purified invertase isolated from the different five baker yeasts under study ranged between 975 and 1801 IU/ml/min. While the activities of enzymes isolated from distillery yeasts before and after activation were 120 and 1100 IU/ml/min. The activity of lyophilized partially purified powder of enzyme isolated from activated distillery yeast was19300 U/g. The Km and Vmax values of the enzyme isolated from activated distillery yeast were 7.56 mg/ml and 294.12 IU/ml/min, respectively. These results were compared to those values of invertase isolated from Egyptian active dry Baker’s yeast and the commercial invertase data sheet with a sample of sweetase 20 p enzyme obtained from Germany stern enzyme company. The results recorded in this paper clearly appeared that the active powder invertase could be obtained from activated distillery yeast by the easy and inexpensive method.
{"title":"Isolation and partial purification of invertase from different baker's and distillery Saccharomyces cerevisiae","authors":"A. Zohri, Abdel-Al Gaber, Osama Ahmed, Ahmed Mohammed","doi":"10.21608/esugj.2018.228290","DOIUrl":"https://doi.org/10.21608/esugj.2018.228290","url":null,"abstract":"Invertase enzyme from different commercial kinds of Baker’s and distillery Saccharomyces cerevisiae was isolated and partially purified as a crude enzyme by salt stress process and ethanol precipitation. The lyophilization takes place for the enzyme isolated from activated distillery S. cerevisiae. The activities of partially purified invertase isolated from the different five baker yeasts under study ranged between 975 and 1801 IU/ml/min. While the activities of enzymes isolated from distillery yeasts before and after activation were 120 and 1100 IU/ml/min. The activity of lyophilized partially purified powder of enzyme isolated from activated distillery yeast was19300 U/g. The Km and Vmax values of the enzyme isolated from activated distillery yeast were 7.56 mg/ml and 294.12 IU/ml/min, respectively. These results were compared to those values of invertase isolated from Egyptian active dry Baker’s yeast and the commercial invertase data sheet with a sample of sweetase 20 p enzyme obtained from Germany stern enzyme company. The results recorded in this paper clearly appeared that the active powder invertase could be obtained from activated distillery yeast by the easy and inexpensive method.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80352561","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 : 2018-12-01DOI: 10.21608/esugj.2018.228294
A. Ahmed, A. El-Taib, A. Eanar
The present study was carried out at El-Mattana Agricultural Research Station (Latitude of 25.17 o N and longitude of 32.33 o E), Luxor Governorate, Egypt during the 2014/2015 and 2015/2016 growing seasons to find out the suitable row spacing (80, 100 and 120 cm) on yield and quality of two promising sugarcane varieties viz. G.2003-47 and G.2003- 49 compared with the commercial variety (G.T. 54-9). The results indicated significant differences among tested genotypes in stalk height, cane yield in the plant cane and first ratoon crops, while stalk diameter and sugar yield exhibited significant differences only in the first ratoon. Row spacing had a significant effect on the number of millable cane / m 2 , cane and sugar yields /fed in the plant cane and first ratoon crops, while it had a significant effect on stalk height only in plant cane crop. The row spacing of 120 cm exerted the highest number of millable cane / m 2 , stalk height, and sugar yield in plant cane and first ratoon crops, as well as stalk diameter, cane yield, Brix, richness and reducing sugars in plant cane only. Moreover, the check cultivar recorded the highest mean value of sugar yield in the first ratoon crop, when planted at 120 cm row spacing. On the other hand, the 80 cm inter row-spacing gave the highest mean values of purity and sugar recovery% in both plant cane and first ratoon crops and Brix, sucrose and richness in first ratoon only. The significant linear effects were found for the number of millable cane / m 2 , stalk height, cane yield, sugar yield and reducing sugar with the rate of row spacing.
本研究于2014/2015和2015/2016生长季在埃及卢克索省El-Mattana农业研究站(纬度25.17 o N，经度32.33 o E)进行，以比较G.2003-47和G.2003- 49两个有前景的甘蔗品种(G.T. 54-9)的产量和品质，找出合适的行距(80、100和120 cm)。结果表明，不同基因型间甘蔗植株的茎高和甘蔗产量存在显著差异，而茎粗和糖产量仅在第一代作物中存在显著差异。行距对甘蔗和第一代再生作物的可蔗数/ m2、甘蔗产量和食糖产量均有显著影响，而对甘蔗的茎高有显著影响。行距为120 cm时，蔗株和初生作物的可蔗数、茎高和糖产量最高，蔗株的茎粗、甘蔗产量、糖度、丰度和还原糖含量最高。此外，对照品种在行距120 cm时，在第一次再生作物中平均糖产量最高。另一方面，行距为80 cm时，甘蔗和第一代作物的纯度和糖回收率平均值最高，而糖度、蔗糖和丰富度仅在第一代作物中最高。可蔗数/ m2、茎高、甘蔗产量、糖产量、还原糖产量与行距率呈显著的线性关系。
{"title":"Evaluation of sugarcane genotypes under different row spacing","authors":"A. Ahmed, A. El-Taib, A. Eanar","doi":"10.21608/esugj.2018.228294","DOIUrl":"https://doi.org/10.21608/esugj.2018.228294","url":null,"abstract":"The present study was carried out at El-Mattana Agricultural Research Station (Latitude of 25.17 o N and longitude of 32.33 o E), Luxor Governorate, Egypt during the 2014/2015 and 2015/2016 growing seasons to find out the suitable row spacing (80, 100 and 120 cm) on yield and quality of two promising sugarcane varieties viz. G.2003-47 and G.2003- 49 compared with the commercial variety (G.T. 54-9). The results indicated significant differences among tested genotypes in stalk height, cane yield in the plant cane and first ratoon crops, while stalk diameter and sugar yield exhibited significant differences only in the first ratoon. Row spacing had a significant effect on the number of millable cane / m 2 , cane and sugar yields /fed in the plant cane and first ratoon crops, while it had a significant effect on stalk height only in plant cane crop. The row spacing of 120 cm exerted the highest number of millable cane / m 2 , stalk height, and sugar yield in plant cane and first ratoon crops, as well as stalk diameter, cane yield, Brix, richness and reducing sugars in plant cane only. Moreover, the check cultivar recorded the highest mean value of sugar yield in the first ratoon crop, when planted at 120 cm row spacing. On the other hand, the 80 cm inter row-spacing gave the highest mean values of purity and sugar recovery% in both plant cane and first ratoon crops and Brix, sucrose and richness in first ratoon only. The significant linear effects were found for the number of millable cane / m 2 , stalk height, cane yield, sugar yield and reducing sugar with the rate of row spacing.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86518029","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 : 2018-12-01DOI: 10.21608/esugj.2018.228103
T. Salaheldin, Mohamed Mahmoud Abd El Wahab, A. Awadalla, Ahmed N. Gad
Taher A. Salaheldin , Mohamed Mahmoud Abd El Wahab Hoda, A. Awadalla, and Ahmed Nasrallah Gad Nano Technology Characterization Lab., British university in Egypt. Nanotechnology& Advanced Materials Central Lab., Agricultural Research Center. Sugar Technology Research Institute,Assiut University, Egypt. Research & Development Center, ESIIC. ______________________________________________________________
Taher A. Salaheldin, Mohamed Mahmoud Abd El Wahab Hoda, A. Awadalla和Ahmed Nasrallah Gad纳米技术表征实验室。在埃及的英国大学。纳米技术与先进材料中心实验室。农业研究中心。埃及阿西尤特大学糖业技术研究所。ESIIC研发中心。______________________________________________________________
{"title":"Effect of Hydroxyapatite Nanoparticles on the Behavior of Calcium, Silicate, and Phosphate in Cane Juice Treatment","authors":"T. Salaheldin, Mohamed Mahmoud Abd El Wahab, A. Awadalla, Ahmed N. Gad","doi":"10.21608/esugj.2018.228103","DOIUrl":"https://doi.org/10.21608/esugj.2018.228103","url":null,"abstract":"Taher A. Salaheldin , Mohamed Mahmoud Abd El Wahab Hoda, A. Awadalla, and Ahmed Nasrallah Gad Nano Technology Characterization Lab., British university in Egypt. Nanotechnology& Advanced Materials Central Lab., Agricultural Research Center. Sugar Technology Research Institute,Assiut University, Egypt. Research & Development Center, ESIIC. ______________________________________________________________","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86001616","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 : 2018-12-01DOI: 10.21608/esugj.2018.228116
A. Zohri, S. Hassan, Rehab M. F. Kassim
Microbial fuel cells (MFCs) are considered simple and robust technology in the field of wastewater treatment as well as electricity generation. The middle-term application can be foreseen at market value prices. This technology might become certified as a prospective new technology for the conversion of organic wastes to electricity. In the current study, a total of 40 yeast isolates were collected from 20 samples of sugarcane molasses. Twenty-one yeast isolates were examined for their potential to produce electricity from sugarcane molasses. All isolates had the ability to produce electricity. Four of them (isolates number: MY 9, MY10, MY18 and MY19 were considered as high producers. They yielded power densities of 59.858, 61.25, 52.8125 and 47.432 mW/m 2 , respectively. Yeast isolate MY10 from sugarcane molasses showed the highest power density (P) (61.25 mW/m 2 ), highest current (I) (0.175mA/m 2 ) and highest voltage (V) (350mV/m 2 ). This isolate was identified based on 18S rRNA sequences as Meyerozyma guilliermondii and deposited in the Gene bank nucleotide sequence database under accession numbers KY624417.
{"title":"Potentiality of Some Yeast Isolates for Electricity Generation from Sugarcane Molasses","authors":"A. Zohri, S. Hassan, Rehab M. F. Kassim","doi":"10.21608/esugj.2018.228116","DOIUrl":"https://doi.org/10.21608/esugj.2018.228116","url":null,"abstract":"Microbial fuel cells (MFCs) are considered simple and robust technology in the field of wastewater treatment as well as electricity generation. The middle-term application can be foreseen at market value prices. This technology might become certified as a prospective new technology for the conversion of organic wastes to electricity. In the current study, a total of 40 yeast isolates were collected from 20 samples of sugarcane molasses. Twenty-one yeast isolates were examined for their potential to produce electricity from sugarcane molasses. All isolates had the ability to produce electricity. Four of them (isolates number: MY 9, MY10, MY18 and MY19 were considered as high producers. They yielded power densities of 59.858, 61.25, 52.8125 and 47.432 mW/m 2 , respectively. Yeast isolate MY10 from sugarcane molasses showed the highest power density (P) (61.25 mW/m 2 ), highest current (I) (0.175mA/m 2 ) and highest voltage (V) (350mV/m 2 ). This isolate was identified based on 18S rRNA sequences as Meyerozyma guilliermondii and deposited in the Gene bank nucleotide sequence database under accession numbers KY624417.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82026194","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 : 2018-12-01DOI: 10.21608/esugj.2018.228291
A. Zohri, G. Mahmoud, Nermien Sadik, Radwa A. Hanafy
Nowadays, microbial production of natural products represents a hot spot point in our environment and becomes an alternative way to chemical synthetic. In our research, Aspergillus flavus No . 3 shows great power in both biomass and kojic acid production. Plackett–Burman design utilize Egyptian sugarcane molasses as a sole carbon source giving kojic acid production of 0.82 (predicted 1.04) g/l to 24.65 (predicted 23.74) g/l, consuming sugar at 27.33 (predicted 26.96) % to 89.87 (predicted 87.46) % and forming dry biomass between 3.6 (predicted 3.8) g/l and 28.2 (predicted 28.05) g/l. The maximum kojic acid (24.65 g/l) and biomass value (28.2 g/l) obtained at 25°C; 9, 5 days of incubation, pH 3, 5; 0.5%, 2% inoculum size and the shaking rate at 150 rpm using fermentation medium (g/l) of sugarcane molasses, 60; yeast extract, 7, 3; KH 2 PO 4, 2; ZnSO 4 .7H 2 O, 0.001 and MgSO 4 .7H 2 O, 1, respectively.
{"title":"A Study on the factors affecting biomass formation by a highly kojic acid producer fungal isolate from sugarcane molasses","authors":"A. Zohri, G. Mahmoud, Nermien Sadik, Radwa A. Hanafy","doi":"10.21608/esugj.2018.228291","DOIUrl":"https://doi.org/10.21608/esugj.2018.228291","url":null,"abstract":"Nowadays, microbial production of natural products represents a hot spot point in our environment and becomes an alternative way to chemical synthetic. In our research, Aspergillus flavus No . 3 shows great power in both biomass and kojic acid production. Plackett–Burman design utilize Egyptian sugarcane molasses as a sole carbon source giving kojic acid production of 0.82 (predicted 1.04) g/l to 24.65 (predicted 23.74) g/l, consuming sugar at 27.33 (predicted 26.96) % to 89.87 (predicted 87.46) % and forming dry biomass between 3.6 (predicted 3.8) g/l and 28.2 (predicted 28.05) g/l. The maximum kojic acid (24.65 g/l) and biomass value (28.2 g/l) obtained at 25°C; 9, 5 days of incubation, pH 3, 5; 0.5%, 2% inoculum size and the shaking rate at 150 rpm using fermentation medium (g/l) of sugarcane molasses, 60; yeast extract, 7, 3; KH 2 PO 4, 2; ZnSO 4 .7H 2 O, 0.001 and MgSO 4 .7H 2 O, 1, respectively.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74474256","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 : 2018-12-01DOI: 10.21608/esugj.2018.228094
T. Salaheldin, M. Abd El Wahab, H. Awadalla, A. Gad
______________________________________________________________ Abstract In this study, the application of nano-hydroxyapatite (NHA) in the clarification of mixed cane juice "MJ” was investigated via batch experiments on a pilot scale. Control points (pH, doses, retention time, color, and turbidity) of this process were evaluated compared with the traditional sulfitation process. The results were evaluated using a statistical T-test. The results showed that the most proper pH, doses and retention time are 7.5, 300 ppm, and 1.5 hr, respectively. Since, applying such values led to a significant reduction in turbidity and color of clear juice (55 % and 19 % respectively) compared with the traditional sulfitation and phosphation process. These results mean a predicted soft scale formed in the evaporators, the lower color of produced sugar, higher sugar recovery, removing the cost of sulfur, and minimizing the cost of calcium oxide to half. The results were discussed via the properties of hydroxyapatite and its highest surface area that adsorbs denatured proteins, prevents the formation of melanoidin coloring compounds and promotes clarification efficiency.
{"title":"Application of Nano-Hydroxyapatite in Sugarcane Juice Clarification","authors":"T. Salaheldin, M. Abd El Wahab, H. Awadalla, A. Gad","doi":"10.21608/esugj.2018.228094","DOIUrl":"https://doi.org/10.21608/esugj.2018.228094","url":null,"abstract":"______________________________________________________________ Abstract In this study, the application of nano-hydroxyapatite (NHA) in the clarification of mixed cane juice \"MJ” was investigated via batch experiments on a pilot scale. Control points (pH, doses, retention time, color, and turbidity) of this process were evaluated compared with the traditional sulfitation process. The results were evaluated using a statistical T-test. The results showed that the most proper pH, doses and retention time are 7.5, 300 ppm, and 1.5 hr, respectively. Since, applying such values led to a significant reduction in turbidity and color of clear juice (55 % and 19 % respectively) compared with the traditional sulfitation and phosphation process. These results mean a predicted soft scale formed in the evaporators, the lower color of produced sugar, higher sugar recovery, removing the cost of sulfur, and minimizing the cost of calcium oxide to half. The results were discussed via the properties of hydroxyapatite and its highest surface area that adsorbs denatured proteins, prevents the formation of melanoidin coloring compounds and promotes clarification efficiency.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76458924","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 : 2018-12-01DOI: 10.21608/esugj.2018.223948
Elmahdy Teama, E. Ali, F. Fathy, Rasha Mustafa
{"title":"Effect of boron concentrations and application time on the productivity and quality of some sugar beet cultivars","authors":"Elmahdy Teama, E. Ali, F. Fathy, Rasha Mustafa","doi":"10.21608/esugj.2018.223948","DOIUrl":"https://doi.org/10.21608/esugj.2018.223948","url":null,"abstract":"","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82799318","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 : 2018-12-01DOI: 10.21608/esugj.2018.228293
A. Said, R. Gabr, Bahaa E. Ali, A. El-Naggar
In the present study, catalytic photogeneration of hydrogen peroxide has been carried out in the presence of Ag-TiO2 catalysts by using a batch reactor with a UV (36 watts) lamp. A series of Ag-TiO2 catalysts (0.25-5%) was synthesized by the wet impregnation method and with a doping content of up to 5.0 wt% Ag at different calcination temperatures (200, 300, 400 and 500°C). The physic-chemical characteristics of the synthesized catalysts were characterized by powder X-ray diffraction (XRD), and Fourier transforms infrared spectroscopy (FT-IR). The photocatalytic activity of Ag-TiO2 was evaluated in the H2O2 photogeneration in an aqueous solution in presence of formic acid under UV light illumination. The concentration of photogenerated H2O2 was estimated iodometrically. The results revealed that the yield of H2O2 photogeneration at optimum reaction conditions (176 ppm) was achieved.
{"title":"Study on photogeneration of hydrogen peroxide over ag/tio2 catalysts in water","authors":"A. Said, R. Gabr, Bahaa E. Ali, A. El-Naggar","doi":"10.21608/esugj.2018.228293","DOIUrl":"https://doi.org/10.21608/esugj.2018.228293","url":null,"abstract":"In the present study, catalytic photogeneration of hydrogen peroxide has been carried out in the presence of Ag-TiO2 catalysts by using a batch reactor with a UV (36 watts) lamp. A series of Ag-TiO2 catalysts (0.25-5%) was synthesized by the wet impregnation method and with a doping content of up to 5.0 wt% Ag at different calcination temperatures (200, 300, 400 and 500°C). The physic-chemical characteristics of the synthesized catalysts were characterized by powder X-ray diffraction (XRD), and Fourier transforms infrared spectroscopy (FT-IR). The photocatalytic activity of Ag-TiO2 was evaluated in the H2O2 photogeneration in an aqueous solution in presence of formic acid under UV light illumination. The concentration of photogenerated H2O2 was estimated iodometrically. The results revealed that the yield of H2O2 photogeneration at optimum reaction conditions (176 ppm) was achieved.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77102681","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 : 2018-06-01DOI: 10.21608/esugj.2018.228400
A. K. Kamal El‐dean, M. Abd El-Wahab, Hashim Yassin, Muhammad Abdullah
This research aims to remove the solid sediments that completely blocked the central distribution pipe in the juice clarifiers. These sediments can't be removed by traditional methods such as crushing or heating, due to the special condition of the pipe inside the clarifier, its narrow diameter and vertical position. Therefore, chemical methods were used to solve this problem. A new technique was used in this process through a mixture of sodium hydroxide and hydrogen peroxide solution. There are many experiments and attempts to find the most suitable way of addition and also the final required concentrations of 1:1 dilution for both solutions and the diluted sodium hydroxide solution (48%) was added firstly and after 24 hours a solution of hydrogen peroxide was added with twice the amount of sodium hydroxide. This work was based on the fact that the decomposition of hydrogen peroxide in the alkaline medium is accompanied by the release of oxygen, the occurrence of effervescence and the rise of impurities up to the surface of the solution in an exothermic reaction. This method which has been succeeded in removing sediments from the pipe of lengths up to 7 meters, can be considered a new addition in the field of chemical removal of sediments.
{"title":"Cleaning of clogging central tube in juice clarifiers","authors":"A. K. Kamal El‐dean, M. Abd El-Wahab, Hashim Yassin, Muhammad Abdullah","doi":"10.21608/esugj.2018.228400","DOIUrl":"https://doi.org/10.21608/esugj.2018.228400","url":null,"abstract":"This research aims to remove the solid sediments that completely blocked the central distribution pipe in the juice clarifiers. These sediments can't be removed by traditional methods such as crushing or heating, due to the special condition of the pipe inside the clarifier, its narrow diameter and vertical position. Therefore, chemical methods were used to solve this problem. A new technique was used in this process through a mixture of sodium hydroxide and hydrogen peroxide solution. There are many experiments and attempts to find the most suitable way of addition and also the final required concentrations of 1:1 dilution for both solutions and the diluted sodium hydroxide solution (48%) was added firstly and after 24 hours a solution of hydrogen peroxide was added with twice the amount of sodium hydroxide. This work was based on the fact that the decomposition of hydrogen peroxide in the alkaline medium is accompanied by the release of oxygen, the occurrence of effervescence and the rise of impurities up to the surface of the solution in an exothermic reaction. This method which has been succeeded in removing sediments from the pipe of lengths up to 7 meters, can be considered a new addition in the field of chemical removal of sediments.","PeriodicalId":11564,"journal":{"name":"Egyptian Sugar Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87844812","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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