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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 8 Documents
Search results for , issue " Vol 2, No 1 (2011)" : 8 Documents clear
The influence of Palm Kernel Cake and Rice Bran Fermentation Product Mixture to the Broiler Carcass Quality Priabudiman, Yadi; Sukaryana, Yana
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

The purpose of this research was to study the effect of the use of palm kernel cake (PKC) and rice bran (RB) fermentation products mixture to the percentage of broiler carcass weight pieces. Research using completely randomized design (CRD) with treatments of the fermentation product usage rate of   0% (P0), 10% (P1), 20% (P2), 30% (P3) and 40% (P4) of the total ration of 4replications.  Variables measured were percentage of carcass weight ratio cut    pieces  of carcass weight (carcass front, rear carcass, breast meat, wings, back, and thigh) with carcass weight multiplied by 100%. The results showed that the percentage of carcass weight piece front and rear carcass was shown at P3.
Biogas Production From Cassava Starch Effluent Using Microalgae As Biostabilisator Budiyono, B.; Kusworo, Tutuk Djoko
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

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Abstract

The rapid growing of Indonesian population is emerging several critical national issues i.e. energy, food, environmental, water, transportation, as well as law and human right. As an agricultural country, Indonesia has abundant of biomass wastes such as agricultural wastes include the cassava starch wastes. The problem is that the effluent from cassava starch factories is released directly into the river before properly treatment. It has been a great source of pollution and has caused environmental problems to the nearby rural population. The possible alternative to solve the problem is by converting waste to energy biogas in the biodigester. The main problem of the biogas production of cassava starch effluent is acid forming-bacteria quickly produced acid resulting significantly in declining pH below the neutral pH and diminishing growth of methane bacteria. Hence, the only one of the method to cover this problem is by adding microalgae as biostabilisator of pH. Microalgae can also be used as purifier agent to absorb CO2.The general objective of this research project was to develop an integrated process of biogas production and purification from cassava starch effluent by using biostabilisator agent microalgae. This study has been focused on the used of urea, ruminant, yeast, microalgae, the treatment of gelled and ungelled feed for biogas production, pH control during biogas production using buffer Na2CO3, and feeding management in the semi-continuous process of biogas production. The result can be concluded as follows: i) The biogas production increased after cassava starch effluent and yeast was added, ii) Biogas production with microalgae and cassava starch effluent, yeast, ruminant bacteria, and urea were 726.43 ml/g total solid, iii) Biogas production without  microalgae was 189 ml/g total solid.
Organic Fertilizer Production From Cattle Waste Vermicomposting Assisted By Lumbricus Rubellus Sumardiono, Siswo; Murwono, R.P. Djoko; Nugroho, Amin
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (515.905 KB) | DOI: 10.12777/ijse.v2i1.1235

Abstract

Composting is decomposition of compound in organic waste by specific treatment using microorganism aerobically. Natural composting for producing organic fertilizer from manure and market waste utilize long time processing and less equal to the market demand. Vermicomposting is a technique to produce high quality compos fertilizer from biodegradable garbage and mixture of red worm (Lumbricus Rubellus). In conventional compos production took 8 weeks of processing time, in vermicomposting only took half processing time of conventional technique. It is occurred by red worm additional ease cellulose degradation contain in manure which is could not decomposed with composting bacteria. The purposes of this research are to investigate the effect of manure comparison to red worm growth and to evaluate the effect of comparison between manure and market waste to red worm growth. This research was conducted by vary the weight of red worm (100 gr, 200 gr, 300 gr, 400 gr, 500 gr) and market waste addition (50 gr, 100 gr, 150 gr, 200 gr, 300 gr). Moreover, 3 kg of manure was mixed by various weight of red worm, while variation of market waste addition was involved 500 gr red worm and 3 kg manure mixture. Optimum increasing weight of red worm that was obtained by 100 gr red worm addition is 160 gr within 2 weeks. In added market waste variation, the highest increasing of red worm was resulted by 50 gr market waste addition, with 60 gr increasing weight of red worm. Production of casting fertilizer was highly effected by composition of used materials such as medium, manure and red worm comparison as well as market waste additional
Potential Production of Polyunsaturated Fatty Acids from Microalgae Handayani, Noer Abyor; Ariyanti, Dessy; Hadiyanto, Hady
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Currently, public awareness of healthcare importance increase. Polyunsaturated fatty acid is an essential nutrition for us, such arachidonic acid, docosahexaenoic acid and eicosapentaenoic acid. The need of Polyunsaturated fatty acid generally derived from fish oil, but fish oil has a high risk chemical contamination. Microalgae are single cell microorganism, one of Phaeodactylum tricornutum which have relatively high content of eicosapentaenoic acid (29,8%). Biotechnology market of Polyunsaturated fatty acid is very promising for both foods and feeds, because the availability of abundant raw materials and suitable to develop in the tropics. This literature review discusses about the content of Polyunsaturated fatty acid in microalgae, omega-3, omega-6, Polyunsaturated fatty acid production processes, and applications in public health
Ability of Lactobacillus plantarum JR64 isolated from noni juice in lowering Cholesterol in vivo Sumarno, Lanjar; Mangunwidjaja, Djumali; M. Fauzi, Anas; Syamsu, Khaswar; Siswi Indrasti, Nastiti; Prasetya, Bambang
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

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Abstract

Recently public’s attention to the importance of healthy food increases rapidly. Probiotic based food exploiting lactic acid bacteria is among the healthy food. Lactobacillus plantarum JR64 isolate from Morinda citrifolia fruit was assessed for its probiotic in-vivo by using Wistar  Rat. The purpose of this research was to study the ability of probiotic Lactobacillus plantarum JR64 in lowering serum LDL (Low Density Lipoprotein) of Wistar Rat. Twenty Rats were grouped into 4, each group consisted of 5 Rats. First Group was a negative control  given standard normal diet of 20 gr/day plus aquadest. Second Grup was a positive control given cholesterol normal diet 20 gr /day plus Propil Tio Urasil (PTU) 60 mg/kg body weight/day. Third Group was supplemented with normal diet 20 gr /day plus Propil Tio Urasil (PTU) 60 mg  kg body weight /day and  1012 CFU Lactobacillus plantarum JR64. Fourth Group was the same as third Group unless the probiotic using commercial probiotic Lactobacillus bulgariccus at 1012 CFU. Blood samples were withdrawn for measurement of total cholesterol, triglyceride, High Density Lipoprotein (HDL), and Low Density Lipoprotein (LDL) cholesterol every week and measured by using spectrophotometer with 546 nanometers wavelength. The results show that probiotic Lactobacillus plantarum JR64 isolated from noni juice significantly (p < 0,01) reduce Low Density Lipoprotein (LDL) and Triglyceride in vivo  and tend to reduce High Density Lipoprotein (HDL) and total cholesterol.
Submission Information support, editor
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Submission Information
Authors guideline support, editor
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Authors guideline
Aims and Scope support, editor
International Journal of Science and Engineering (IJSE) Vol 2, No 1 (2011)
Publisher : Chemical Engineering Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Aims and Scope

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