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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 19, No 4 (2001): Buletin Penelitian Hasil Hutan" : 3 Documents clear
IDENTIFIKASI POLA DAN EFISIENSI TATA NIAGA ROTAN DI JAWA Supriadi, Achmad; Rachman, Osly
Jurnal Penelitian Hasil Hutan Vol 19, No 4 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2778.627 KB) | DOI: 10.20886/jphh.2001.19.4.209-218

Abstract

The marketing chain of rattan commodity is closely related to the income distribution of those who perform efficiently the marketing and mechanism system of rattan. This study deals with the investigation on the patterns of rattan-marketing in Java, i.e. (I) Inter-islands merchant --> rattan crafter --> crafter collector --> domestic consumer; (2) Inter-islands merchant --> rattan crafter --> domestic consumer; (3) Rattan crafter --> exporter producer --> overseas consumer.Viewed from the degree of benefit, all the parties involved in those rattan-marketings have gained a reasonable benefit with the revenue and cost ratio (RCR) values ranging between 1.11 and 1.27. Evaluated from the benefit distribution, rattan marketing with pattern (1) was efficient, while those with pattern (2) and (3) were inefficient and the most efficient, respectively. In the pattern (3). there appeared a positive trend about the presence of domination by Exporter producer. This is be cause that domination has brought about some benefit to those taking part in the other rattan-marketing activities. Keywords : Rattan, marketing, efficiency, and benefit.   
SIFAT PULP KIMIA-TERMOMEKANIK (CTMP) KA YU MANGIUM (Acacia mangium Willd) DARI BERBAGAI TINGKAT UMUR M, Rena; Siagian, Siagian; Roliadi, Han; Martua, Togar Hendrik
Jurnal Penelitian Hasil Hutan Vol 19, No 4 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4391.773 KB) | DOI: 10.20886/jphh.2001.19.4.245-257

Abstract

This investigation deals with the assessment of mangium (Acacia mangium Willd.) wood plantation of various maturities for the manufactureof chemi-thermo-mechanical pulp (CTMP) with varying chemical (alkali) concentrations. The properties of CTMP examined were those related to its possibility for newsprint. The ages consisted of three levels (i.e. 6, 7 and 10 years) at which the respective mangium stands were normally harvested from their first rotation. Three ages groups, of mangium were felled for obtaining wood samples. Afterwards, the mangium woods were chipped for further investigation. The alkali concentrations for pre-pulping (chip- softening) stage were consecutively 2, 4, 6, and 8 percent. In the Asplund refiner, the softened chips underwent a 15 minute pre-steaming at 5 psi and then fiberized into pulp for 3 minutes in the Asplund refiner. The resulting pulp were determined for their yield, and further bleached by using peroxyde in 2 stages. The bleached pulps were also examined of their yield, and subsequently made into handsheet at the targeted grammage (50 gram per sq.m) for testings of their actual grammage, strength and optical properties.Data analysis reveals that different wood ages and varying alkali concentrations did not contribute significant effect on their bleached pulp yield. The pulp yields were relatively high in the range of 60-75 percent. The hand-sheets of pulp in terms of its grammage, ranged from 43.0 to 51.6 g/m2. These could satisfy the SNI (Indonesian National Standards) requirements for newsprint. The thicknesses of pulp sheets, which were above 0.10 mm, did not meet the newsprint pulp standard quality requirement. Physical properties of mangium CTMP as described by their tensile, and tear index were correlated positively with wood age. On the contrary, these properties were not affected by alkali concentrations. Further, the different wood maturities brought about significant changes in pulp brightness; and so did the alkali concentration, whereby the brightness was affected negatively. Further, the opacity of the pulp sheet was not affected by wood maturities and alkali concentrations.Wood of 10 years old and with alkali concentration at 2 percent were found to be the optimum treatment combination for its application in the manufacture of CTMP for newsprint. The grammage, thickness, physical, and optical properties of the resulting CTMP, satisfy the SNI requirement for newsprint.
PEMBUATAN ARANG AKTIF DARI SABUT KELAPA SAWIT DENGAN BAHAN PENGAKTIF NH4HCO3 DAN (NH4)2C03 DOSIS RENDAH 1) Pari, Gustan; Sailah, Ilah
Jurnal Penelitian Hasil Hutan Vol 19, No 4 (2001): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4292.238 KB) | DOI: 10.20886/jphh.2001.19.4.231-244

Abstract

This report deals with experimental study on the utilization of palm-tree bast as raw material for activated charcoal. In this regard, the main aim was to study the effect of concentrations of vaporized  NH4HCO3and (NH4)2C03 solutions as activating agents (in persentages) on properties of activated charcoal, and to evaluate its use for purifying ground waler In this regard. the vapors might consist of NH3, CO2, and H2O. The manufacture of activated charcoal involved two consecutive stages, i.e. charcoaling and activation. The charcoaling was performed on the palm-tree bast in a retort equipped with electrical heater, followed by the activation stage where by the inside retort temperature was increased to 850ºC. At this temperature, the vapors of both NH4HCO3and (NH4)2C03 were each passed into the retort al several concentrations (i.e. 0.0 %; 0.01%; 0.025%; 0.075%. and 0.1% of either vapor) for 90 minutes at pressure of 0.05 kg/cm2 and on completion the resulting activated charcoal was examined of their inherent properties.It was found out that the activated charcoal with NH4HCO3vapor at 0.01% revealed the most satisfactory properties with respect to its selection for purifying the ground water. The yield of activated charcoal at this vapor percentage was 15.99%, moisture content 0.10%, ash content 31.85%, volatile matter 24.85%, carbon content 43.21%, adsorptive capacity of benzene 13.33 %, of CHCl3  16.28%, of NH3 26.65%. of CCl4 26.64%, of iodine 799.5 mg/g, of methylene blue 136.10 mg/g and surface area 463.41 m2/g.           ·The ground water afler being purified with this selected activated charcoal revealed the improvement on its qualities. as shown by the decreases in Fe from 4.919 mg/l; to 0.00 mg/I, Zn from 0.031 mg/I to 0.00 mg/I, Mn from 7.780 mg/I to 6.16 mg/I; the increase in pH from 6.99 to 8.00 on and the more transparent in its color.

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