In rotary drilling operation, the hydraulic circuit typically consists of stand pipe, rotary hose, swivel, Kelly, drill pipe, drill collar, drill bit, and the annulus between the drillstring and the open hole or the casing. Stand Pipe Pressure, abbreviated as SPP, is defined as the total frictional pressure drop in the hydraulic circuit. SPP, an important drilling parameter in selecting proper mud weight, can be calculated using di erent rheological models. In this paper, the results obtained using the four widely used rheological models namely the Newtonian model, the Bingham plastic model, the Power law model and the Herschel-Bulkley model are presented. The rheological data used are collected by performing circulation test while drilling a vertical well in the Po valley, Italy. The rheological constants associated with each of the four models are calculated using regression analysis, For the three flow rates used during the circulation test, SPP has been predicted with a maximum error of 1.2% when compared with the measured values. The Bingham plastic model produces best SPP estimates for all the three flow rates for the drilling condition considered.
{"title":"Prediction of Stand Pipe Pressure Using Conventional Approach","authors":"Dipankar Chowdhury, P. Skalle, Mohammed M. Rahman","doi":"10.3329/CERB.V13I1.2703","DOIUrl":"https://doi.org/10.3329/CERB.V13I1.2703","url":null,"abstract":"In rotary drilling operation, the hydraulic circuit typically consists of stand pipe, rotary hose, swivel, Kelly, drill pipe, drill collar, drill bit, and the annulus between the drillstring and the open hole or the casing. Stand Pipe Pressure, abbreviated as SPP, is defined as the total frictional pressure drop in the hydraulic circuit. SPP, an important drilling parameter in selecting proper mud weight, can be calculated using di erent rheological models. In this paper, the results obtained using the four widely used rheological models namely the Newtonian model, the Bingham plastic model, the Power law model and the Herschel-Bulkley model are presented. The rheological data used are collected by performing circulation test while drilling a vertical well in the Po valley, Italy. The rheological constants associated with each of the four models are calculated using regression analysis, For the three flow rates used during the circulation test, SPP has been predicted with a maximum error of 1.2% when compared with the measured values. The Bingham plastic model produces best SPP estimates for all the three flow rates for the drilling condition considered.","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"110 1","pages":"7-11"},"PeriodicalIF":0.0,"publicationDate":"2009-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83615386","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}
B. Jaganathan, S. M. Hossain, K. M. M. S. Begum, N. Anantharaman
The ligninolytic fungus Phanerochaete chrysosporium was used to treat the pulp and paper-mill effluent. It was pelletized and used for batch and continuous experiments in a two-litre fluidized bed bioreactor. The continuous experiment was initiated with concentrated effluent without any extra carbon source and the average removal of color was 3.8%. Then, it was fed with 50% diluted effluent which was enriched with glucose. At first, the glucose was consumed by the fungus, which is indicated by a COD removal of 38.5% and a 26.5% removal of color. This indicates the need for an extra carbon source for the fungal treatment. Using the mycelial mass in suspension, two experiments were carried out. The best results were obtained with 20% fungus and shaking of the effluent. During the last three days of the experiment using the mycelium mass the average removal of color, COD and BOD was 86.4%, 78.8% and 70.5%, respectively. The result indicates the potential of Phanerochaete chrysosporium for use in the treatment of pulp and paper-mill effluent. Keywords: Pulp and paper-mill effluent, fungal treatment, Phanerochaete chrysosporium . DOI = 10.3329/cerb.v13i1.2613 Chemical Engineering Research Bulletin 13 (2009) 13-16
{"title":"Aerobic Pollution Abatement of Pulp mill Effluent with the White Rot fungus Phanerochaete chrysosporium in Three-phase Fluidized Bed Bioreactor","authors":"B. Jaganathan, S. M. Hossain, K. M. M. S. Begum, N. Anantharaman","doi":"10.3329/CERB.V13I1.2613","DOIUrl":"https://doi.org/10.3329/CERB.V13I1.2613","url":null,"abstract":"The ligninolytic fungus Phanerochaete chrysosporium was used to treat the pulp and paper-mill effluent. It was pelletized and used for batch and continuous experiments in a two-litre fluidized bed bioreactor. The continuous experiment was initiated with concentrated effluent without any extra carbon source and the average removal of color was 3.8%. Then, it was fed with 50% diluted effluent which was enriched with glucose. At first, the glucose was consumed by the fungus, which is indicated by a COD removal of 38.5% and a 26.5% removal of color. This indicates the need for an extra carbon source for the fungal treatment. Using the mycelial mass in suspension, two experiments were carried out. The best results were obtained with 20% fungus and shaking of the effluent. During the last three days of the experiment using the mycelium mass the average removal of color, COD and BOD was 86.4%, 78.8% and 70.5%, respectively. The result indicates the potential of Phanerochaete chrysosporium for use in the treatment of pulp and paper-mill effluent. Keywords: Pulp and paper-mill effluent, fungal treatment, Phanerochaete chrysosporium . DOI = 10.3329/cerb.v13i1.2613 Chemical Engineering Research Bulletin 13 (2009) 13-16","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"16 1","pages":"13-16"},"PeriodicalIF":0.0,"publicationDate":"2009-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87605903","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}
Quality precipitated calcium carbonate has much demand in various chemical and allied industries as filler, surface coating, whitening, adhesive etc. A study was carried out by modifying classical lime-soda process to obtain high quality precipitated calcium carbonate. The experiments were carried out in two stages using commercial and analytical grades of sodium carbonate and lime as reactants. After causticization, the filtrates from the washing of calcium carbonate were used to prepare all solutions for reactions in next stage. The precipitated calcium carbonate obtained from the process was analyzed and comparisons were made with the commercially available precipitated calcium carbonate produced from carbonation method. The calcium carbonate produced from causticization was superior to those produced by carbonation method in the country. The crystal structure of carbonate was calcite.
{"title":"Laboratory Scale Production of Commercial Grade Calcium Carbonate from Lime-Soda Process","authors":"Islam, A. Quader","doi":"10.3329/CERB.V12I0.1490","DOIUrl":"https://doi.org/10.3329/CERB.V12I0.1490","url":null,"abstract":"Quality precipitated calcium carbonate has much demand in various chemical and allied industries as filler, surface coating, whitening, adhesive etc. A study was carried out by modifying classical lime-soda process to obtain high quality precipitated calcium carbonate. The experiments were carried out in two stages using commercial and analytical grades of sodium carbonate and lime as reactants. After causticization, the filtrates from the washing of calcium carbonate were used to prepare all solutions for reactions in next stage. The precipitated calcium carbonate obtained from the process was analyzed and comparisons were made with the commercially available precipitated calcium carbonate produced from carbonation method. The calcium carbonate produced from causticization was superior to those produced by carbonation method in the country. The crystal structure of carbonate was calcite.","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"336 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2008-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80631484","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}
The objective of the study was to treat the textile wastewater and convert it into potable grade water in the laboratory scale. It involved a rigorous treatment procedure involving screening, coagulation, flocculation, aeration, biological treatment, filtration and ion exchange. From the analysis of the treated water it can be said  that the industrial waste water can be converted into potable grade water. Keywords: Wastewater treatment, Zero discharge, Potable water. DOI = 10.3329/cerb.v12i0.1493 Chemical Engineering Research Bulletin 12 (2008) 20-23
{"title":"POTABLE WATER FROM INDUSTRIAL WASTEWATER","authors":"Ali, Khan, T. Afroz","doi":"10.3329/CERB.V12I0.1493","DOIUrl":"https://doi.org/10.3329/CERB.V12I0.1493","url":null,"abstract":"The objective of the study was to treat the textile wastewater and convert it into potable grade water in the laboratory scale. It involved a rigorous treatment procedure involving screening, coagulation, flocculation, aeration, biological treatment, filtration and ion exchange. From the analysis of the treated water it can be said  that the industrial waste water can be converted into potable grade water. Keywords: Wastewater treatment, Zero discharge, Potable water. DOI = 10.3329/cerb.v12i0.1493 Chemical Engineering Research Bulletin 12 (2008) 20-23","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"99 1","pages":"20-23"},"PeriodicalIF":0.0,"publicationDate":"2008-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85780461","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}
M. Rahman, T. Siddique, S. Samdani, Kazi Bayzid Kabir
Lubricating oil requirement is increasing day by day with the establishment of new industries, increase in number of vehicular transports and mechanization of agriculture. Generated waste oil can be considered as a source of pollution or as a resource depending on the methods of utilization and management. This study compares different end- uses of waste oil and develops a pathway through which basic properties of the base-oil can be retrieved. In this study a pilot scale setup of conventional acid-clay technique was established to recover waste oil collected from different sources and a set of experimental runs were conducted by varying the different process variables. Effects of the operating variables on the product quality are also discussed in this article. The recovery of regenerated base-oil was found to be in between 62 to 66 percent from this experimental study.
{"title":"Effect of Operating Variables on Regeneration of Base-Oil from Waste Oil by Conventional Acid-Clay Method","authors":"M. Rahman, T. Siddique, S. Samdani, Kazi Bayzid Kabir","doi":"10.3329/CERB.V12I0.1494","DOIUrl":"https://doi.org/10.3329/CERB.V12I0.1494","url":null,"abstract":"Lubricating oil requirement is increasing day by day with the establishment of new industries, increase in number of vehicular transports and mechanization of agriculture. Generated waste oil can be considered as a source of pollution or as a resource depending on the methods of utilization and management. This study compares different end- uses of waste oil and develops a pathway through which basic properties of the base-oil can be retrieved. In this study a pilot scale setup of conventional acid-clay technique was established to recover waste oil collected from different sources and a set of experimental runs were conducted by varying the different process variables. Effects of the operating variables on the product quality are also discussed in this article. The recovery of regenerated base-oil was found to be in between 62 to 66 percent from this experimental study.","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"106 1","pages":"24-27"},"PeriodicalIF":0.0,"publicationDate":"2008-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77888384","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}
Air pollution is one of the major environmental problems now days, especially for developing countries such as Bangladesh and Brickfields have been identified as a vital pollutant source of the major cities of the country. Verification of the applicability of an effective air quality model in Bangladesh condition, especially for brickfield pollution was the main concern of this work. To achieve that objective, ambient pollutant concentrations were measured experimentally and compared with the results generated through modeling using Industrial Source Complex (ISC3) model. Air sampling was done at different locations in a cluster of brickfields of 41 brick kilns near Amin Bazar, Savar using Gastec tubes and High volume sampler. Gastec tubes were used for gaseous pollutants and High volume sampler was used for Total Suspended Particulates (TSP). Gaseous pollutants included Sulfur dioxide, Carbon monoxide, and Hydrocarbons. Those pollutant data at different locations on different days were compared with simulated value generated through ISC3. Industrial Source Complex (ISC3) model was found very effective and appropriate both for gaseous pollutants and particulate matter for brickfield pollution in Bangladesh and which indicates the prospect of utilizing this model for different condition and purposes in Bangladesh. From both the experimental and simulated data, particulate matter had been identified as the most important pollutant in that region which is urgently needed to be taken care of.
{"title":"Applicability of Air pollution Modeling in a Cluster of Brickfields in Bangladesh","authors":"Shoeb Ahmed, I. Hossain","doi":"10.3329/CERB.V12I0.1495","DOIUrl":"https://doi.org/10.3329/CERB.V12I0.1495","url":null,"abstract":"Air pollution is one of the major environmental problems now days, especially for developing countries such as Bangladesh and Brickfields have been identified as a vital pollutant source of the major cities of the country. Verification of the applicability of an effective air quality model in Bangladesh condition, especially for brickfield pollution was the main concern of this work. To achieve that objective, ambient pollutant concentrations were measured experimentally and compared with the results generated through modeling using Industrial Source Complex (ISC3) model. Air sampling was done at different locations in a cluster of brickfields of 41 brick kilns near Amin Bazar, Savar using Gastec tubes and High volume sampler. Gastec tubes were used for gaseous pollutants and High volume sampler was used for Total Suspended Particulates (TSP). Gaseous pollutants included Sulfur dioxide, Carbon monoxide, and Hydrocarbons. Those pollutant data at different locations on different days were compared with simulated value generated through ISC3. Industrial Source Complex (ISC3) model was found very effective and appropriate both for gaseous pollutants and particulate matter for brickfield pollution in Bangladesh and which indicates the prospect of utilizing this model for different condition and purposes in Bangladesh. From both the experimental and simulated data, particulate matter had been identified as the most important pollutant in that region which is urgently needed to be taken care of.","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"43 1","pages":"28-34"},"PeriodicalIF":0.0,"publicationDate":"2008-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85611213","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}
In recent times Bangladesh celebrated 60 years of engineering education. The engineering education in Bangladesh has gone through different changes in its life span; however, there are plenty to improve to cope with the world trend of engineering. Industrial diversification, changes is socio-economic structures, and advancements of new sciences and technologies are forcing changes in engineering curriculum to keep the content compatible. This paper discusses some of the new ideas of engineering education practiced at different parts of the world. It also offers a review of the new approaches which can be applied in Bangladesh to make the engineering students more competitive and compatible, so that they can go through a lifelong learning process and confront the changes in engineering career. The overall goal of this article is to help improving the engineering education system in Bangladesh where students can develop themselves as independent and interdependent learners.
{"title":"Novel Ideas on Engineering Education in Bangladesh","authors":"Kazi Bayzid Kabir, Khan, Iqbal Mahmud","doi":"10.3329/CERB.V12I0.1492","DOIUrl":"https://doi.org/10.3329/CERB.V12I0.1492","url":null,"abstract":"In recent times Bangladesh celebrated 60 years of engineering education. The engineering education in Bangladesh has gone through different changes in its life span; however, there are plenty to improve to cope with the world trend of engineering. Industrial diversification, changes is socio-economic structures, and advancements of new sciences and technologies are forcing changes in engineering curriculum to keep the content compatible. This paper discusses some of the new ideas of engineering education practiced at different parts of the world. It also offers a review of the new approaches which can be applied in Bangladesh to make the engineering students more competitive and compatible, so that they can go through a lifelong learning process and confront the changes in engineering career. The overall goal of this article is to help improving the engineering education system in Bangladesh where students can develop themselves as independent and interdependent learners.","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"43 1","pages":"11-19"},"PeriodicalIF":0.0,"publicationDate":"2008-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80664456","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}
This study compares the quality of different brands of Ordinary Portland Cement (OPC) available in Bangladesh. The amounts of chemical constituents like SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, insoluble residue (IR), free lime and loss on ignition (LOI) were determined in accordance with British Standard (BS) Specifications. All the results are presented to provide both quantitative and qualitative notion of several locally produced ordinary Compositions of most of this constituents as determined experimentally were within the range of the standard values. The possible reasons for variation in chemical compositions and their consequences have been discussed.
{"title":"CHEMICAL ANALYSIS OF ORDINARY PORTLAND CEMENT OF BANGLADESH","authors":"Ali, I. Khan, M. I. Hossain","doi":"10.3329/CERB.V12I0.1491","DOIUrl":"https://doi.org/10.3329/CERB.V12I0.1491","url":null,"abstract":"This study compares the quality of different brands of Ordinary Portland Cement (OPC) available in Bangladesh. The amounts of chemical constituents like SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, insoluble residue (IR), free lime and loss on ignition (LOI) were determined in accordance with British Standard (BS) Specifications. All the results are presented to provide both quantitative and qualitative notion of several locally produced ordinary Compositions of most of this constituents as determined experimentally were within the range of the standard values. The possible reasons for variation in chemical compositions and their consequences have been discussed.","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":"34 1","pages":"7-10"},"PeriodicalIF":0.0,"publicationDate":"2008-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88033949","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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