Chemical Engineering Research Bulletin最新文献_第8页

Biofiltration kinetics of ethylacetate and xylene using sugarcane bagasse based biofilter 蔗渣基生物滤池对乙酸乙酯和二甲苯的生物过滤动力学

Chemical Engineering Research Bulletin Pub Date : 2010-05-28 DOI: 10.3329/CERB.V14I1.4683

S. Viswanathan, R. Manivasagam, R. Natarajan

{"title":"Biofiltration kinetics of ethylacetate and xylene using sugarcane bagasse based biofilter","authors":"S. Viswanathan, R. Manivasagam, R. Natarajan","doi":"10.3329/CERB.V14I1.4683","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.4683","url":null,"abstract":"Biodegradation kinetic behaviors of ethyl acetate and xylene in a sugarcane bagasse biofilter were investigated. Microbial growth rate, biochemical reaction rate and kinetic analysis were inhibited at higher inlet concentration. For the microbial growth process, the microbial growth rate of ethyl acetate was greater than that of xylene in the inlet concentration range of 0.2 - 1.2 g.m- 3 . The degree of inhibitive effect was almost the same for ethyl acetate and xylene in this concentration range. The half-saturation constant Ks values of ethyl acetate and xylene were 1.8489 and 1.784 g.m -3 , respectively. The maximum reaction rate V m values of ethyl acetate and xylene were 0.8073and 0.8438 g C h -1 kg -1 packed material, respectively at a concentration of 0.2 g.m -3 . For the biochemical reaction process, the biochemical reaction rate of ethyl acetate was greater than that of xylene in the inlet concentration range of 0.2 - 1.2 g.m -3 . The inhibitive effect for ethyl acetate was more pronounced than that for 0.2 - 1.2 g.m -3 in this concentration range. The EAX concentration profiles along the depth were also determined by using diffusion reaction model. It was observed that at low concentration and low flow rate, the model is in good agreement with the experimental values for ethylacetate and xylene. Keywords: Xylene, ethyl acetate, sugarcane bagasse, biofilter, biochemical reaction DOI = 10.3329/cerb.v14i1.4683 Chemical Engineering Research Bulletin 14 (2010) 51-57","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81535996","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}

引用次数: 11

Treatment of Textile Wastewater with Chlorine: An Effective Method 氯处理纺织废水的一种有效方法

Chemical Engineering Research Bulletin Pub Date : 2010-05-25 DOI: 10.3329/CERB.V14I1.3206

A. Quader

引用次数: 19

Diagnosis of Process Nonlinearities and Valve stiction: Data Driven Approaches By M.A.A. Shoukat Choudhury, Sirish L. Shah, Nina F. Thornhill (Springer-Verlag, ISBN: 978-3-540-79223-9, 2008) 过程非线性和阀杆的诊断:数据驱动方法，作者:M.A.A. Shoukat Choudhury, Sirish L. Shah, Nina F. Thornhill (Springer-Verlag, ISBN: 978-3-540-79223- 9,2008)

Chemical Engineering Research Bulletin Pub Date : 2010-05-25 DOI: 10.3329/CERB.V14I1.5048

Kamrul Hasan

引用次数: 18

Effect of preservatives on extending the shelf-life of Rasogolla 防腐剂对罗汉果保鲜期的影响

Chemical Engineering Research Bulletin Pub Date : 2010-05-24 DOI: 10.3329/CERB.V14I1.3940

D. Das, Md Alauddin, M. Rahman, K. Nath, Md. Rokonuzzaman Rokonuzzaman

{"title":"Effect of preservatives on extending the shelf-life of Rasogolla","authors":"D. Das, Md Alauddin, M. Rahman, K. Nath, Md. Rokonuzzaman Rokonuzzaman","doi":"10.3329/CERB.V14I1.3940","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.3940","url":null,"abstract":"The study aims, to find out an effective preservative to extend the shelf-life of Rasogolla, a highly popular Bengal sweetmeat achieving the highest worth in all social and religious festivals in Bangladesh due to its special appeal of taste, as well as to assess the effect of preservative on its biochemical and microbial status. Rasogolla available in local market survives for too a short span (2-3days) to export in abroad since its processing and preservation still lie at a very infantile stage. In this research, Rasogolla was prepared in laboratory using calcium propionate, sodium metabisulfite, sorbic acid, sodium diacetate, sodium propionate, acetic acid, benzoic acid, sodium benzoate, butylated hydroxytoluene, butylated hydroxyanisole, P-4-hydroxybenzoate as preservatives followed by a comparative study on the biochemical and microbial status of both market and laboratory made Rasogolla. Sorbic acid and sodium metabisulfite exerted the highest effectiveness in extending Rasogolla’s shelf-life for 24 and 15 days, respectively, whereas the combination of sorbic acid (0.1%) and sodium metabisulfite (0.1%) was found more effective than their individual uses rendering the longer keeping ability up to 30 days ensuring color, flavor, taste and texture. Compositional analysis showed that total solid, moisture, fat, protein, carbohydrate and ash content of market Rasogolla were 75.87-83.17%, 16.83-24.13%, 2.86-4.31%, 5.2-7.94%, 64.26-73.30% and 0.30-0.61%, respectively, whereas those in laboratory made were 73.70-79.83%, 20.17-26.30%, 3.18-6.09% 6.9-8.59%, 61.18-65.25% and 0.30-0.61%, respectively. Market Rasogolla were found more susceptible for microbial growth and contamination than that prepared in laboratory. Keywords: Rasogolla, Preservative, Sorbic acid, Channa, Na-metabisulfite DOI = 10.3329/cerb.v14i1.3940 Chemical Engineering Research Bulletin 14 (2010) 19-24","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73818387","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}

引用次数: 2

Chemical Analysis and Comparison of Ordinary Portland Cement of Khyber Pakhtoon Khwa Pakistan 巴基斯坦开伯尔-普赫图恩普通硅酸盐水泥的化学分析与比较

Chemical Engineering Research Bulletin Pub Date : 2010-05-19 DOI: 10.3329/CERB.V14I1.4320

N. Amin, Khurshid Ali

引用次数: 10

Study of the Physical Parameters of Ordinary Portland Cement of Khyber Pakhtoon Khwa Pakistan and their comparison with Pakistan standard Specifications 巴基斯坦开伯尔-普赫图省普通硅酸盐水泥物理参数的研究及其与巴基斯坦标准规格的比较

Chemical Engineering Research Bulletin Pub Date : 2010-05-19 DOI: 10.3329/CERB.V14I1.3729

N. Amin

引用次数: 4

Removal of methyl red from aqueous solution by activated carbon prepared from the Annona squmosa seed by adsorption 以番荔枝籽为原料制备的活性炭吸附去除水溶液中的甲基红

Chemical Engineering Research Bulletin Pub Date : 2010-05-16 DOI: 10.3329/CERB.V14I1.3767

T. Santhi, S. Manonmani, T. Smitha

{"title":"Removal of methyl red from aqueous solution by activated carbon prepared from the Annona squmosa seed by adsorption","authors":"T. Santhi, S. Manonmani, T. Smitha","doi":"10.3329/CERB.V14I1.3767","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.3767","url":null,"abstract":"The use of low-cost, locally available, highly efficiencient and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods of removing dyes from wastewater. This study investigates the potential use of activated carbon prepared from the Annona squmosa seed for the removal of methyl red (MR) dye from simulated wastewater. The effects of different system variables, adsorbent dosage, initial dye concentration, pH and contact time were investigated and optimal experimental conditions were ascertained. The results showed that as the amount of the adsorbent increased, the percentage of dye removal increased accordingly. Optimum pH value for dye adsorption was 7.0. Maximum dye was sequestered within 50 min of the start of every experiment. The adsorption of methylene blue followed the pseudo-second –order rate equation and fits the Langmuir, Freundlich, Dubinin-Radushekevich (D-R) and Tempkin equations well. The maximum removal of MR was obtained at pH 7 as 82.81% for adsorbent dose of 0.2 g/ 50 mL and 25 mg L -1 initial dye concentration at room temperature. Furthermore, adsorption kinetics of MR was studied and the rate of adsorption was found to conform to pseudo-second –order kinetics with a good correlation (R 2 > 0.99) with intraparticle diffusion as one of the rate determining steps. Activated carbon developed from the Annona squmosa seed can be an attractive option for dye removal from diluted industrial effluents since test reaction made on simulated dyeing wastewater showed better removal percentage of MR. Keywords: Annona squmosa, Adsorption, Wastewater, Methyl red, Kinetics, Activated carbon DOI = 10.3329/cerb.v14i1.3767 Chemical Engineering Research Bulletin 14 (2010) 11-18","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75883040","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}

引用次数: 99

The Effect of Desludging and Adsorption Ratios on the Recovery of Low Pour Fuel Oil (LPFO) from Spent Engine Oil 脱泥比和吸附比对废机油低倾燃料油回收的影响

Chemical Engineering Research Bulletin Pub Date : 2010-05-02 DOI: 10.3329/CERB.V14I1.4092

P. Josiah, S. S. Ikiensikimama

引用次数: 17

Mathematical Modeling of Distillery Wastewater Biomethanation in Fluidized-bed Bioreactor 流化床生物反应器中蒸馏废水生物甲烷化的数学建模

Chemical Engineering Research Bulletin Pub Date : 2010-05-01 DOI: 10.3329/CERB.V14I1.4224

S. M. Hossain, M. Das

{"title":"Mathematical Modeling of Distillery Wastewater Biomethanation in Fluidized-bed Bioreactor","authors":"S. M. Hossain, M. Das","doi":"10.3329/CERB.V14I1.4224","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.4224","url":null,"abstract":"An anaerobic fluidized- bed reactor was designed to treat distillery wastewaters for biogas generation using actively digested aerobic sludge of a sewage plant. The optimum digestion time was 8 h and optimum initial pH of feed was observed as 7.5 respectively. The optimum temperature of feed was 40°C and optimum feed flow is 14 L/ min with maximum OLR was 39.513 kg COD m -3 h -1 respectively. The OLR was calculated on the basis of COD inlet in the bioreactor at di\u000berent flow rates. Maximum CH 4 gas concentration was 63.56 % (v/v) of the total (0.835 m 3 /kg COD m -3 h -1 ) biogas generation, corresponding to 0.530 m 3 /kg COD m -3 h -1 at optimum digestion parameters. Maximum COD and BOD reduction of the distillery wastewaters were 76.82% (w/w) and 81.65% (w/w) with maximum OLR of 39.513 kg COD m -3 h -1 at optimum conditions respectively. The rate constant ( k ) was measured as 0.31 h -1 in fluidized-bed bioreactor and followed a first order rate equation. The specific growth rate ( μ ) was 0.99 h -1 and maximum sp. growth rate ( μ max ) was 1.98 h -1 respectively. The bacterial yield coefficient ( Y ) was determined as 0.319 /kg COD m -3 h -1 at optimum parameters. The studies also dealt with the mathematical modeling of the experimental data on biomethanation and suggested modeling equations relating to kinetic parameter (rate constant, k ), maximum specific growth rate ( μ max ) with respect to COD (substrate) removal. The mathematical model was also analyzed for hydrodynamic pressure ( Δp ) vs feed flow ( u ) and hydrodynamic pressure ( Δp ) with respect to CH 4 gas yields. The linear and non-linear equations which fitted the models were obtained. Keywords: Biomethanation, anaerobic, optimum condition, modeling DOI = 10.3329/cerb.v14i1.4224 Chemical Engineering Research Bulletin 14 (2010) 37-43","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73011247","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}

引用次数: 1

Simultaneous Saccharification and Fermentation (SSF) of pretreated sugarcane bagasse using cellulase and Saccharomyces cerevisiae - Kinetics and modeling 利用纤维素酶和酿酒酵母进行预处理甘蔗渣同步糖化发酵的动力学与建模

Chemical Engineering Research Bulletin Pub Date : 2010-04-15 DOI: 10.3329/CERB.V14I1.4156

S. Elumalai, V. Thangavelu

{"title":"Simultaneous Saccharification and Fermentation (SSF) of pretreated sugarcane bagasse using cellulase and Saccharomyces cerevisiae - Kinetics and modeling","authors":"S. Elumalai, V. Thangavelu","doi":"10.3329/CERB.V14I1.4156","DOIUrl":"https://doi.org/10.3329/CERB.V14I1.4156","url":null,"abstract":"Optimization of process variables in the bioconversion of pretreated sugarcane bagasse using cellulase and Saccharomyces cerevisiae by Simultaneous Saccharification and Fermentation (SSF) was investigated in the present study. A 2 3 five level Central Composite Design (CCD) experiments with central and axial points were used to develop a statistical model for the optimization of process variables such as incubation temperature , pH and fermentation time. Data obtained from Response Surface Methodology (RSM) on ethanol production were subjected to the analysis of variance (ANOVA) and analyzed using a second order polynomial equation and the contour plots were used to study the interactions among three relevant variables of the fermentation process. The fermentation experiments were carried out using an online monitored modular fermenter 2L capacity. The processing parameters setup for reaching a maximum response for ethanol production was obtained when applying the optimum values for temperature (35°C), pH (5.5) and fermentation time (114 h). Maximum ethanol concentration (4.80 g/l) was obtained from 50 g/l pretreated sugarcane bagasse at the optimized process conditions in aerobic batch fermentation. Various kinetic models such as Monod, Modified Logistic model, Modified Logistic incorporated Leudeking – Piret model and Modified Logistic incorporated Modified Leudeking – Piret model have been evaluated and the constants were predicted. Keywords: Optimization, response surface methodology (RSM), simultaneous saccharification and fermentation (SSF), ethanol, Saccharomyces cerevisiae DOI = 10.3329/cerb.v14i1.4156 Chemical Engineering Research Bulletin 14 (2010) 29-35","PeriodicalId":9756,"journal":{"name":"Chemical Engineering Research Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91429501","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}

引用次数: 22