Jurnal Teknobiologi
Published by Universitas Riau
ISSN : -     EISSN : -
Articles 116 Documents
DISTRIBUSI SPASIAL LOGAM PB DAN CU PADA SEDIMEN DAN AIR LAUT PERMUKAAN DI PERAIRAN TANJUNG BUTON KABUPATEN SIAK PROVINSI RIAU

Amin, Bintal, Afriyani, Evy, Saputra, Mikel Adi

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

A study on the concentrations of Pb and Cu in the surface seawater and sedimenthas been conducted to determine the concentrations and to assess their spatial dis-tribution in Tanjung Buton coastal waters. All water quality parameters measuredin the present study were still in the range of tolerable levels for the survival ofmarine organisms. Heavy metal concentrations in surface seawater and sedimentwere found to have almost similar trend where the highest concentrations werefound in station closed to the most populated area in the former port area. Concen-trations of Pb in both seawater and sediment were higher than Cu. Vertical distribu-tion of Cu in sediment were clearly noticed where the concentration in deeper layerwere found to have higher concentration when compared to the upper layers (al-though they were statistically non significant) which shows the effects of anthropo-genic activities in the former port area. Concentration of Pb in seawater were possi-tively correlated with that in sediment (y = 15,58 + 5,573x; r = 0,31), whilst Cushows negative correlation (y = 0,91 - 10,5x; r = 0,1). Higher concentration ofheavy metals was assumed to be related to an increase in population inhabited thesurrounding waters and anthropogenic activities such as dumping of debris, ports,boat traffic and other anthropogenic sources. In general, the concentrations of Pband Cu in Tanjung Buton coastal waters were comparatively lower than reportedvalues in regional studies. As the ever increasing human activities and rapid devel-opments in many infrastructures and industry sectors, a continuous environmentmonitoring program should be implemented to keep and protect the sustainableTanjung Buton coastal resources.

Efisiensi dan Efektivitas Pencucian Kimia pada Membran Ultrafiltrasi Sistem Aliran Dead End Proses Pengolahan Limbah Emulsi Minyak

Asmura, Jecky

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

The application of dissociation of oil-water emulsion by using membrane hadshown the happening of fouling phenomenon. This phenomenon caused by foulingmaterial tend to have the character of irreversible and reversibel. This foulant canbe conducted with chemical cleaning. Target of this research is to study efficiencyand efectivness at chemical cleaning with cleaning chemical agent (NaOH, HCland HNO3) for reduction foulant of oil-water emulsion. The operation has beendone by forward and dead-end stream system of Membrane UF acetate cellulose.Flushing to be conducted for 30 minute with pressure 0,5 bar, so also with chemicalcleaning (NaOH, HCl, and HNO3). Variation concentration of chemical agentcleaning are 0,1, 05, and 1 N. Comparison oil-water emulsion is 5% : 95% whichtreatment for a long of 60 minute with operating pressure variation of 0,5; 1 and 1,5bar. The result of this research obtained, that NaOH 1 N more efficient eliminatefoulant compared to HCl and HNO3. Mean cleaning effectiveness is equal 29,82 %after cleaned with tired NaOH but downhill effectiveness till 16,40 % if using HCland 8,80 % while be used HNO3.

KARAKTERISTIK BIOFISIK TEMPAT PENELURAN PENYU SISIK (ERETMOCHELYS IM- BRICATA) DI PULAU ANAK ILEUH KECIL, KEPULAUAN RIAU

Setyawatiningsih, Sri Catur, Marniasih, Dewi

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

A surveys on biophysic characteristic nesting site of hawksbill turtle (Eretmochelysimbricata) in the Anak Ileuh Kecil Island had been conducted. The aim of thisstudy was to identify biophyisical characteristics of the nesting site of E. imbricatain the Anak Ileuh Kecil Island, Kepulauan Riau. Physical characteristics of thenesting site (organic material content, distance between tidal line and first vegeta-tion and the sand’s grain size) were analyzed using Principle Component Analysis(SPSS 10.0.1). The nesting site of the E. imbricata was in the Southern part of theAnak Ileuh Kecil Island. In this area, the slope of the beach was 28,070, the beach iswider than other areas and it has less vegetation. Results of the statistical analysisshown that the organic material content in the substrat, distance between the tidalline and the first vegetation may suitable for the hawksbill turtle for nesting. How-ever, there was a threat for the nesting area as Pes caprae and Barringtonia forma-tion areas are converse into extensive palm oil plantation.

KINETIKA PENYISIHAN NITROGEN DALAM AIR BUANGAN RUMAH POTONG HEWAN PADA SEQUENCING BATCH REACTOR AEROB

Darmayanti, Lita

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

The objective of study was to evaluate performance and kinetic of the treatment ofwastewater from slaughterhouse for nitrogen matter removal by aerobic sequencingbatch reactor (SBR) without pretreatment. SBR is one of the fill and draw versionsof activated sludge process that is operated with cycle. The phases of cycle are fill,react, settle, draw, and idle. The slaughterhouses waste which are from killing,washing, and cutting are similar to domestic sewage in regard to their compositionand effects on receiving bodies of water. However, the organic content and nitro-gen content of these wastes are considerably higher than those of domestic sewag-es. The the best removal efficiency of N-NH4+ is 49,32%, occur on time of react is6 hours. The result of the kinetic analysis are got maximum spesific substrate utili-zation rate 0,1508 hr-1, maximum spesific growth rate 0,0387 hr-1, half-velocityconstant 177,516 mg/l, yield coefficient 0,2216 mg VSS/mg N-NH4+, and decaycoefficient 0,0019 hr-1. Denitrification which is signed by the decreasing of nitrateconcentration is also occured in this process as a result of the lower DO concentra-tion and also supported by the result of bacteria identification.

PEMBERIAN PUPUK KALIUM PADA SISTEM TUMPANGSARI TANAMAN JAHE DAN JAGUNG DENGAN JARAK TANAM BERBEDA

Yetti, Husna, Karlita, Fitriani

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

This research aim was to know the dose of potassium fertilizer and different plantspacing of ginger between corn plants to increase produce the ginger crop and cornwhich conducting at multiple cropping system. This research was conducted usingthe Completelly Randomized Block Design of the planning (RAK) factorial con-sisted of 2 factor and 3 repeated. The first factor was potassium fertilizer including0 kg KCl/ha, 100 kg KCl/ha, 200 kg KCl/ha, and 300 kg KCl/ha. The second factorwas different plant spacing of ginger crop including 25 x 35 cm, 30 x 40 cm, and35 x 45 cm. Every treatment and replication was 2 x 2 m. Parameter observed wereheight of ginger crop and corn crop, relative growth rate of ginger crop and corncrop, number of ginger crop, heavy of wet ginger crop, heavy of dry ginger crop,the time of appear that flower of corn, the wind of corn crop, heavy of dry corncrop, and heavy 100 of grain. Analysis was continued by Duncan New MultipleRange Test the (DNMRT) of level 5 %. Research indicate that the giving of potas-sium fertilizer with dose 100 kg/ha and 25 x 35 cm of ginger crop spacing representthe best treatment to increase produce the ginger of each crop and that the giving ofpotassium fertilizer with dose 300 kg/ha and 30 x 40 cm, 35 x 45 cm represent thebest treatment to increase produce the corn of each crop.

PEMBUATAN ESTER METIL SULFONAT DARI ESTER METIL PALM STEARIN

Helianty, Sri

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

Sulfonated methyl ester are known well as vegetable oil derived surfactants thatpredictly, will subtitude fossil oil derived surfactants. This study was aimed tosulfonate methyl ester of palm stearin at temperature range 80-110 0C. Sulfonationwas carried out isothermally in a closed batch reactor at atmospheric pressure withNa2S2O5 as sulfonation agent at 80, 100 and 110 0C for 5 hours. After the sulfona-tion was accomplished, samples of reaction mixture was analysed quantitatively byinfra red spectrophotometer. The spectrum patterns of sulfonated methyl esters aresimilar. Sulphonated spectrum at 80 ° C show that sulfonated methyl ester is betterthan sulfonated methyl ester at a temperature of 100 and 1100C.

PENDEKATAN STOKASTIK DALAM KAJIAN KELAYAKAN PEMBANGUNAN JALAN TOL STUDI KASUS RENCANA RUAS TOL KANDIS - DUMAI

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

The Kandis - Dumai toll road is designed at a second phase of Pekanbaru-Kandis-Dumai toll road development plan. Construction of toll road projects require highcapital outlays with a long payback period. In addition, from a business perspec-tive, the toll road construction project has a sensitive and vulnerable to risk anduncertainty characters. Investment feasibility assessment methods commonly usedare as follow : a) Net Present Value, b) Internal Rate of Return, c) Average Rate ofReturn, and d) Payback Period. Those parameters use a deterministic approach willyield result of single point estimate value. The results are considered to yield a verylimited information and do not represent risks and uncertainties that may be en-countered as the reality of the investment itself. For investors, business strategydecisions with minimal information which is of course very risky. This study ana-lyzed using stochastic approach to find the sensitivity level of the variables thatinfluence (risk), as an effort to provide more comprehensive information in relationto decision making at the level of confidence. The analysis was done by using his-torical data for some risk variables, expert opinions, and results of previous studies.Results of analysis with a stochastic approach showed that with 35 years conces-sion period and the tariffs of vehicle Class I is Rp. 490/Km, Kandis-Dumai tollroad financially feasible. Based on the results of research on risk variables showedthat the variables that are very sensitive and influential in a row are: 1) Bank Indo-nesia Certificates (SBI), 2) Inflation, and 3) volume of vehicles Class III, IV, andV.

PENENTUAN PRIORITAS TEKNOLOGI PENGENDALIAN PENCEMARAN MINYAK DI SELAT RUPAT DENGAN METODE CPI

Nedi, Syahril

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

Marine conservation is an effort that could be conducted in marine region becauseit has correlation with natural resources sustainability for future generation. Marinepollution is caused mainly by oil disposal. Various technologies had been used toprevent oil pollution in marine region. CPI (comparative performance index) me-thod had been used to find out the best technology that could be implemented tocontrol oil pollution in marine area, especially Rupat Strait. The results of theresearch shown that the best technology to control oil pollution in marine area aredispersant technology, oilboom and bioremediation respectivelly. At present, dis-persant and oilboom methods are still populer to prevent oil pollution in marineregion based on timing and rehabilitation cost. Bioremediation method has notbeen used to control oil pollution up to now, but it has good prospective and secureto environment to control oil pollution in the future.

PENGARUH ABU TERBANG TERHADAP KARAKTERISTIK MEKANIK BETON MUTU TINGGI

Kurniawandy, Alex, Djauhari, Zulfikar, Napitu, Elpin Tua

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

The hight strength concrete has known and use in many construction in Indonesia.This is proven with many contruction such as high rise building and long spanbridge that use it. Right now many research about hight strenght concrete combinewith fly ash. PT. RAPP as one of pulp and paper industries in Riau provience usecoal as energy resources. The waste material from burning process produce flay ashthat can be used. In this research, fine and coarse aggregate was take local sourcethat easy find in Pekanbaru market. The basis material for the establishment ofconcrete mixed with fly ash with various compositions and also assisted with thesuperplasticizer to increase workabilty. Variation content of fly ash used 0%, 15%,20%, 25%, and 30% by weight of cement. The type of specimens was a cylinderwith size 150 mm x 300 mm. The compressive strength is 40 MPa were tested at 28days with a curing process. The test results showed that the highest compressivestrength contained in concrete mixtures with fly ash usage 20% at 41.03 MPa. Thehighest value of splitting tensile strength is 3.18 MPa with 20% fly ash content.Value modulus of Elasticity was 4.27 x 104 MPa. The results of this study indicatethe use of fly ash in concrete mixtures optimal in 20%. These were indicated withincrease compressive strength, tensile strength, and modulus of elasticity, while theuse of fly ash above 20% would be decline.

POTENSI PERTUMBUHAN SEMAI ACACIA MANGIUM WILLD. PADA TANAH YANG TERKONTAMINASI LOGAM BERAT

Iriani, Dyah

Jurnal Teknobiologi Vol 2, No 01 (2011)
Publisher : Jurnal Teknobiologi

Show Abstract | Original Source | Check in Google Scholar |

Abstract

Potency of growth in Acacia mangium Willd. seedling in the heavy metal contami-nated soil was studied from July to November 2009. This study aimed to under-stand the growth of Acacia mangium seedling in the heavy metal contaminated soiland accumulation of heavy metal in the leaves. The seed was germinated and thenwas planted with soil from landfill and sandy soil. Student t test was performed tofind the effect of media to growth of A. mangium. The content of Fe, Zn, Cu, Crand Pb within the landfill soil before Acacia mangium was planted were higherthan in sandy soil. For the plants growth in the heavy metal contaminated soil phyl-lode was fully appear on the 10th leaf, while in the sandy soil it was fully appear onthe 12th leaf. The highest heavy metal accumulation in root was Fe, followed byCu, Zn, Pb, and Cr. Concentration of Fe, Zn, Pb and Cu except Cr, within the soilreduced after planted with A. mangium.

Page 1 of 12 | Total Record : 116