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Frequency: 12 issues per year
ISSN: 2250–3005 (online version)
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International Journal of Computational Engineering Research

(IJCER)

 

Articles

 

Research Article  open access
A Study on Biological Treatment of Bio-Diesel Industrial Effluent Using FBBR
Dr.G.V.R.Srinivasa Rao || K.Srinivasa Murty || J.Chiranjeevi
India
Paper Indexed : : 03.3005/0580105
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 08 (August 2015)

Abstract

The present study involves experimentation on the treatment of bio-diesel industrial effluent using a laboratory scale model of Fluidized Bed Bioreactor (FBBR) with three different bed materials viz., MBBR Plastic media, Pumice Stones, high density Foam material. The experiment mainly focuses on the removal of Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) from the bio-diesel industrial effluent. The experiment is conducted for a period over 2 to 3 weeks at daily intervals, till the reactor gets stabilized and a maximum and uniform rates of percent removal of BOD and COD are obtained. The experimental data is analyzed and the results are presented in suitable formats. From the Bio-kinetic study involving reaction rate kinetics and microbial growth kinetics it is observed that, the bio-kinetic reactions taking place in the reactor conform to First order rate of reactions and the Foam pieces are proved to be a good alternative material when compared with that of the Commercially available MBBR (plastic) media

Keywords: Bed material, Biological Oxygen Demand (BOD), Bio-diesel, Chemical Oxygen Demand (COD), Fluidized Bed Bio Reactors (FBBR), Microbial Growth Kinetics, Reaction rate kinetics.

Research Article  open access
Studying & Evaluating the Performance of Solar Box Cookers (Untracked)
Mohammed Hadi Ali
Iraq
Paper Indexed : : 03.3005/05806012
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 08 (August 2015)

Abstract

The primary aim of this study was to conduct the performance evaluation on solar cooker design. The secondary aim was to build and developing of a new and efficient solar cooker design. A direct solar box cooker (Untracked type) was tested in this study with low cost feature and low technology. The testing for the solar box cooker was conducted at the top roof of Material Engineering Department building. In this test, three water quantities (1.5, 1 and 0.5 kg) were used in order to find the effect of the mass quantity of cooking food on the temperature rise inside the solar cooker. The results showed that the attainable temperature reached a maximum cooking temperature of (81.6 oC) for water mass quantity of (1000 grams) with temperature difference between the cooking temperature and the ambient temperature of (61.5 oC). But a lower maximum temperature (81.7 oC) for (500 grams) the reason for that is due the lower solar intensity during the test of partially cloudy day. As a conclusion, it was found that as the solar intensity increases the cooking temperature increases too. The other factor which influences the cooking temperature is the cooking mass as the cooking mass increases the cooking temperature decreases. Although the cooking temperature increases but the standardized Power decreases, this is because the increasing in cooking temperature is not equalizing or go in parallel with the decreasing in cooking mass, thus it is preferable to use solar cooker for adequate cooking mass quantity to get a high merit or advantage solar cookers.

Keywords:

Research Article  open access
Frequency Identification Approach For Wiener Systems
Adil Brouri || Smail Slassi
Morocco
Paper Indexed : : 03.3005/058013016
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 08 (August 2015)

Abstract

Wiener systems identification is studied in presence of possibly infinite-order linear dynamics and static nonlinearity. The problem of identifying Wiener models is addressed in the presence of hard nonlinearity. This latter is not required to be invertible of arbitrary-shape. Moreover, the prior knowledge of the nonlinearity type, being e.g. saturation effect, dead zone or preload, is not required. Using sine excitations, and getting benefit from model plurality, the identification problem is presently dealt with by developing a two-stage frequency identification method.

Keywords:Wiener model, Hard nonlinearity, frequency identification.

Research Article  open access
Determination of the Optimal Process Conditions for the Acid Activation of Ngwo Clay in the Bleaching Of Palm Oil
S .O Egbuna || C. N Mbah || T. O Chime
Nigeria
Paper Indexed : : 03.3005/058017029
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 08 (August 2015)

Abstract

In this work, the optimal adsorption parameters for the adsorption of Carotenoid in the bleaching of palm oil was investigated. Ngwo clay, a local adsorbent obtained from Ngwo town in the South-Eastern province of Nigeria, was used in the study. The palm oil used was also obtained from a local market in Enugu in the same region. The purpose of the work was to develop a model to optimize the efficiency of a local adsorbent that will be cheap and environmentally friendly, for the removal of pigments during refining of vegetable oils. The clay was first, acid activated and characterized, and used in the investigation. Central Composite Design (CCD) package was used to optimize the effects of process parameters of Temperature, Time and Clay Dosage on the bleaching efficiency of Palm Oil. A linear model was predicted and optimized based on BBD. This gave bleaching time of 40min., Temperature of 99.83oC, and Clay dosage of 4%, at a predicted bleaching efficiency of 83%. The optimum conditions were validated to obtain an experimental value of 82.5% with 1.7% error condition.

Keywords:BBD, ANOVA, Ngwo Clay, Palm Oil , bleaching efficiency, Acid activation

Research Article  open access
Effects of Metakaolin Content on Fresh and Hardened Properties of Self Compacted Concrete
Sanjeev Kumar || Rinku Saini

India
Paper Indexed : : 03.3005/058030036
International Journal of Computational Engineering Resaerch, Volume 05 ~ Issue 08 (August 2015)

Abstract

Self-compacting concrete (SCC) is an innovative concrete that does not requires vibration for placing and compaction. SCC has higher powder content and a lower coarse aggregate volume ratio as compared to normally vibrated concrete. If only cement is used in SCC, it becomes high costly, susceptible to be attack and produces much thermal crack. Therefore it is necessary to replace some of the cement by additives like Metakaolin to achieve an economical and durable concrete. Metakaolin (MK) is a pozzolanic material. It is a dehydroxylated form of the clay mineral kaolinite. It is obtained by calcination of kaolinitic clay at a temperature between 500°C and 800°C. Kaolin is a fine, white, clay mineral that has been traditionally used in the manufacture of porcelain. A SSC mix prepaid with the replacement of cement by metakaolin in different ratios (5%, 10%, 15% and 20%). Slump flow and V- Funnel time increase with increase in the percentage of metakaolin and mechanical properties of SCC like Compressive strength, split tensile strength and elastic modulus of SCC decreases with increases in percentage of metakaolin at the age of 7 days and 28 days but increases with increases in percentage of metakaolin at the age of 90 days.

Keywords:BBD, ANOVA, Ngwo Clay, Palm Oil , bleaching efficiency, Acid activation