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International Journal of Science and Engineering (IJSE)
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
The scope of journal covers all area in the application on chemical, physical, mathematical, biological, agricultural, corrossion, and computer science to solve the engineering problems.
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Articles 16 Documents
Search results for , issue " Vol 7, No 1 (2014)" : 16 Documents clear
Plants Growth Rate in Evapotranspiration continuous system reactors as the 2nd Treatment at Anaerobic-evapotranspiration system with High Strength Ammonium in Leachate Influent Zaman, Badrus; Purwanto, Purwanto; Mangkoedihardjo, Sarwoko
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (715.917 KB) | DOI: 10.12777/ijse.0.0.xx

Abstract

Ammonium is one of parameter which responsible to leachate toxicity. Preliminary research was shown that the Fimbristylis globulosa (water plant), Alocasia macrorrhiza (terrestrial plant) and Eleusine indica (terrestrial grass) were potential plants for used as object in evaporation reactor system with high strength ammonium  concentration in leachate treatment. This research was integrated of anaerobic system with evapotranspiration system with continuous influent using ammonium concentration in leachate was 2000 mg/l NH4-N. Plants growth rate was analyzed for 25 days operated. The result shown that average of thallus growth rate of Fimbristylis globulosa was 17,5 cm d-1. The average of leaf and thallus growth rate of Alocasia macrorrhiza was 18,1 cm d-1 and 3,2 cm d-1 respectively. The average of blade and thallus of Eleusine indica were same that was 4,7 cm d-1.This research conclude that integration system of anaerobic and evpotranspiration was be potential used for high strength ammonium in leachate treatment.
THE EFFECT OF INFLUENT CONCENTRATION AND HYDRAULIC LOADING RATE (HLR) TO BOD AND COD REMOVAL ON ARTIFICIAL DOMESTIC WASTEWATER TREATMENT (GREY WATER) USING UASB REACTOR Syafrudin, Syafrudin; Sudarno, Sudarno; Purwanto, Purwanto; Novitasari, Iin
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (631.522 KB) | DOI: 10.12777/ijse.7.1.16-22

Abstract

Upflow anaerobic sludge blanket (UASB) reactor is one of anaerobic biological treatment was develop in late 1970’s. UASB reactor is suitable for the tropic areas because it has a high temperature about 20°-30°C. Domestic wastewater is divided into two types, namely black water and grey water. But in this case used domestic grey water. Grey water is household wastewater from showers, sinks and kitchen. Grey water has a total 75% of the domestic wastewater volume. The research was conducted in laboratory scale. This study performed a variation of Hydraulic Loading Rate (HLR) and the influent concentration. There were 25 reactors include 5 variations of influent concentration and 5 Hydraulic Loading Rate’s (HLR) variation. The research could asses BOD5 and COD removal with treatment in UASB. Efficiency of BOD5 removal by varying the influent concentration and HLR was about 38%-75% and COD was about 40%-77%. The lower concentration could be increase efficiency BOD5 and COD removal. Influent concentration optimum occurred when middle concentration was about 840 mg/L COD and HLR optimum was 0,05 m3/m2/hour.
Standardization of the Electricity and Economic Potentials of Landfill gas (LFG) in Lagos, Nigeria. AKUJIEZE, Christopher N; IDEHAI, Imoukhuede Moses
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1281.817 KB) | DOI: 10.12777/ijse.7.1.1-9

Abstract

Globally, various practical data and scholarly estimations of the electricity potentials of landfill gas (LFG) have been forwarded and these can be juxtaposed for estimations in the megacity called Lagos. The calculated values were between 63.22- 700MW of  derivable electricity. However, in order to limit observable disparities and ambiguities in these derivations and thus allow for more accurate projections, these estimations can be gauged using as template; -stoichiometry, establishing 50% of landfill gas as methane, assuming 50% of this volume as recoverable, and using a proposed engine efficiency of 30%. This standardization projects a theoretical mean achievable electrical power of 121.69 MW for the Lagos area from a population of about 21 million with a generation per capita (GPC) of 0.63kg with biodegradable content of about 60%. The yearly electrical energy was placed at 1,066,004.4 MWh with tariff revenue in excess of US$ 106.6 million /yr. An accruing carbon credit of about US$75.59 million /yr is expected from certified emission reduction (CER). The projected derivations can be used as models for evaluation of the landfill gas and electricity potentials in many parts of the world.
Potential Development of Liquid Smoke from Oil Palm Solid Waste as Biofungicides Gani, Asri; Husni, Husni; Baihaqi, Akhmad; Faisal, M.
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.121 KB) | DOI: 10.12777/ijse.7.1.

Abstract

This research investigated the potential utilization of solid waste from palm oil industry for liquid smoke production in Aceh Province, Indonesia. The liquid smoke can be applied as bio fungicides in agricultural field. Preliminary experiment on the use of liquid smoke as fungicide at Colletotrichum capsisi fungus which causes anthracnose disease on red pepper was also conducted. The survey on the existing potential/availability of palm oil mill in Aceh shows that there are 30 palm oil mills in eight districts with a total of production capacity 1020 ton/hour. Assuming that 10% of palm oil kernel shells are pyrolized into liquid smoke, Aceh province could produce about 23,868 ton of liquid smoke per year. The preliminary test result towards Colletotrichum capsisi fungus shows that the liquid smoke can be used as fungicides.
Pitting Corrosion of Ni3(Si,Ti)+2Cr Intermetallic Compound at Various Chloride Concentrations Priyotomo, Gadang; Sebleku, Pius; Kaneno, Yasuyuki
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (845.976 KB) | DOI: 10.12777/ijse.7.1.10-15

Abstract

The pitting corrosion of Ni3(Si,Ti) with 2 at% Cr containing two regions of a Ni3(Si,Ti) single-phase of L12 structure and a mixture phase of of (L12 +Niss) was investigated as function of chloride concentrations by using a polarization method, scanning electron microscope and energy dispersive X-Ray spectroscopy in neutral sodium chloride solutions at 293 K.  The pitting corrosion of Ni3(Si,Ti) with and without the addition of aluminium and type C276 alloy were also studied under the same experimental condition for the comparison.  The pitting potential obtained for the Ni3(Si,Ti) with 2 at% Cr decreased with increasing chloride concentration.  The specific pitting potentials and the pitting potentials were decreased in the order of C276 alloy > Ni3(Si,Ti) > Ni3(Si,Ti) + 2Cr > Ni3(Si,Ti) + 4Al, which means that the pitting corrosion resistance of Ni3(Si,Ti) with 2 at% Cr was higher than Ni3(Si,Ti) with 4 at% Al, but lower than that of Ni3(Si,Ti).  A critical chloride concentration of Ni3(Si,Ti) with 2 at% Cr was found to be higher than that of Ni3(Si,Ti) with at% Al. In addition, the presence of high concentration for oxygen indicates the occurrence of pit formation.
Environmental Impact Assessment of a Flood Control Channel in Sfax City, Tunisia Dahri, Noura; Abida, Habib
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2058.455 KB) | DOI: 10.12777/ijse.7.1.

Abstract

The objective of this study is to evaluate water and sediment quality in the southern branch of a flood control channel in Sfax city, as well as its neighboring sites.  This artificial channel, located 4km away from downtown Sfax, was implemented in 1984 to protect the city against floods. Even though it contributed to reduce the harmful flood effects, this channel also resulted in new environmental problems that may cause a public health threat. Indeed, artificial surfaces pose a greater risk of infection due to bacteria, fungi and other microorganisms. A total of 19 water samples (9 from the channel and 10 from groundwater wells) were collected in a dry period and analyzed in the laboratory. Furthermore, 12 sediment samples were taken from the bottom of the channel. Water quality data were used to examine the spatial variability of the different water quality parametrs. The resultant maps revealed an important contamination and illustrated that the degree of contamination differs from one site to another, depending on the distance from the pollution source (industrial, domestic or agricultural activity), the depth of the groundwater table and also the maintenance of the well and its surroundings.
EXAMINATION OF THE SUNGKAI’S YOUNG LEAF EXTRACT (Peronema canescens) AS AN ANTIPIRETIC, IMMUNITY, ANTIPLASMODIUM AND TERATOGENITY IN MICE (Mus.muculus) Putranto, Agus Martono Hadi
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (44.473 KB) | DOI: 10.12777/ijse.7.1.30-34

Abstract

The research of examination extract sungkai’s young leafs as an antipyretic, immunity, anti plasmodium and teratogenity in mice (Mus. Muculus) has been done. The aims of this research is examinations in infusa effectiveness extract of the young leafs in mice (Mus. Muculus). The object of this research used 50 males Webster’s species mice has 7 – 8 week olds, averages 30 gram in weight. Mice are divided into 5 groups in examination for antipyretic. Mice has been introduced the DPT-HB fever before. The first group as a negative control treated a pure water, second group as a positive control treated a paracetamol 1.08 mg/Kg w/w and rest of groups treated a young sungkai’s extract leafs in the concentration of 0.186 mg/Kg w/w, 0.375 mg/Kg w/w and 0.5625 mg/Kg w/w respectively. Measurements of the temperature toke in the duration of 30, 60, 90 and 120 minutes. Furthermore, in the immunity examination, mice also divided into 5 groups, first as a negative control treated a pure water, second group as a positive control treated 0.07 mg/Kg imunos w/w and respectively for the rest groups treated with young sungkai’s extract leafs in the concentration of 0.186 mg/Kg w/w, 0.375 mg/Kg w/w and 0.5625 mg/Kg w/w. These treatments held in gavage system with the duration at 24 hours. In examination amount of the leukocyte number, toke from the tail of the mice, has a result the dosage in 0.5625 mg/Kg w/w extract’s young leafs of sungkai could be decrease the temperature 29%, it is better than paracetamol treatment which could be decreased only 26% of temperature. In addition, for the immunity examination, the best dosage of the young sungkai’s extract leafs is 0.567 mg/Kg w/w, which It can increase 36% amount of the leukocyte number. This dosage is better than the positive control by using Imunos, which is can increase only 23% of the temperature.
Physico-Chemical Characterization Of Maluku Nutmeg Oil Marzuki, Ilyas; Joefrie, Bintoro; A. Aziz, Sandra; Agusta, Herdhata; Surahman, Memen
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (135.172 KB) | DOI: 10.12777/ijse.7.1.

Abstract

The essential oil of Banda nutmeg was extracted using hydro-distillation method to characterize their essential oil and volatile components.  Banda, Ambon, and Luhu nutmegs were chosen as sample ecotypes. Nutmeg oils were subjected to physico-chemical and GC-MC analyses.  Results indicated that nutmeg from the three ecotypes produced uncolored oils with the contents in mature seed were 11.69, 11.92, and 9.99%, respectively. Meanwhile those of immature seeds contained 13.32, 11.99, and 11.03% respectively.  Furthermore, the physico-chemical of the oil are specific gravity 0.897 to 0.909 g/ml; refraction index, 1.489 to 1.491; and optical rotation, +11.40 to +16,30.GC-MS analysis suggested that essential oils Maluku nutmegs composed of 28 to 31 components and also showed that nutmeg from Banda comprised 52.8% monoterpene hydrocarbon (MH), 21.11% oxygenated monoterpene (OM), and 18,04% aromatic compound (AC); Ambon’s 45.12% MH, 24.51% OM, and 16.97% AC; and Luhu’s 56.06% MH, 27.34% OM, and 13.62% AC.  Further analysis indicated that there were four important volatile oils fractions in nutmegs i.e. myristicin, elemicin, safrole, and eugenol. Maluku nutmeg contain 5.57 to 13.76% myristicin and 0.97 to 2.46% safrole. In conclusion, nutmeg oil shows a high stability in all physico-chemical properties.  Nutmeg from Banda ecotype has the highest content in myristicin.
Comparison of intelligent systems, artificial neural networks and neural fuzzy model for prediction of gas hydrate formation rate Jalalnezhad, Mohammad Javad; Ranjbar, Mohammad; Sarafi, Amir; Nezamabadi-Pour, Hossein
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (18.385 KB) | DOI: 10.12777/ijse.7.1.35-40

Abstract

The main objective of this study was to present a novel approach for predication of gas hydrate formation rate based on the Intelligent Systems. Using a data set including about 470 data obtained from flow tests in a mini-loop apparatus, different predictive models were developed. From the results predicted by these models, it can be pointed out that the developed models can be used as powerful tools for prediction of gas hydrate formation rate with total errors of less than 4%.
Immobilized bacteria by using PVA (Polyvinyl alcohol) crosslinked with Sodium sulfate Pham, Dinh Van; Tho Bach, Leu
International Journal of Science and Engineering Vol 7, No 1 (2014)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.608 KB) | DOI: 10.12777/ijse.7.1.41-47

Abstract

A new bacteria immobilization technique using PVA (polyvinyl alcohol) crosslink with sodium sulfate was developed. This new technique can simultaneously eliminate the agglomeration of PVA beads and the toxicity of boric acid caused by the PVA-boric methods, also reducing the swelling (when soaking in water) of PVA-boric methods. Beads were immobilized by using four different PVA immobilization processes to create group B, group N, group P and group S. The stability, swelling, relative mechanical strength of these kinds of beads were compared in this study. Only group S was the best and chosen to do experiment for checking survival of bacteria after immobilization process and TOC removal performance of anaerobic reactor. The TOC removal performance of anaerobic reactor achieved 80-87%. 

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