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Jurnal Penelitian Hasil Hutan
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Articles 4 Documents
Search results for , issue " Vol 11, No 5 (1993): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
PENINGKATAN RENDEMEN DAN DAYA SERAP ARANG AKTIF DENGAN CARA KIMIA DOSIS RENDAH DAN GASIFIKASI (Improvement on recovery and quality of activated charcoal through low dossage chemical and gasification treatment) Hartoyo, Hartoyo; Pari, Gustan
Jurnal Penelitian Hasil Hutan Vol 11, No 5 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1993.11.5.205-208

Abstract

Study for improving the recovery and quality of activated charcoal through the combination of chemical and gasification treatments is presented in this paper. The material used in this experiments was charcoal derived from coconut shell. The material was immersed respectively in NaOH, Na2CO3, H3PO4 and ZnCl2 for 24 hours. Charcoal activation was conduted by using steam or combination of steam and mixed C02 and N2. The activated charcoal was produced in a stainless steel retort with electric heater at temperature of 900 - 1000°C.The result shows that the low dossage chemical treatment using NaOH at a concentration of 0,75%, or Na2C03 at a concentration of 0,75%, or ZnCl2 at a concentration of 5%, followed by activation by steam or the combination of steam and mixed C02 and N2.could produce good.quality activated charcoal which fullfils the commercial standard according to JIS. The produced charcoal attained the iodine adsorptive capacity of more than 1050 mg/g. By increasing the concentration of ZnCI2 to 10% or H3P04 to 20 %. followed by steam activation at 900°C - 1000°C, the iodine adsorptive capacity increased to more than 1200 mg/g.
PENGARUH PERLAKUAN PENDAHULUAN BIJI KEMIRI TERHADAP RENDEMEN DAN SIFAT MINYAKNYA (Pretreatment effects of candle nut seedoil on oil yiled and its properties) Wiyono, Bambang; Hastoeti, Poedji
Jurnal Penelitian Hasil Hutan Vol 11, No 5 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2303.915 KB) | DOI: 10.20886/jphh.1993.11.5.174-178

Abstract

The purpose of this research is to study the pretreatment effects of candle nut seed oil on oil yield and its properties. Pretreatments consisted of dry-frying steaming and unpretreatment. The dry-frying was carried out at 100°C for 15 minutes, and steaming was carried out for 30 minutes at the same temperature. Each pretreatment was pressed at 110 kg/cm2 and the difference between means were tested with the LSD procedure.The results showed that pretreatment gave a highly significant effect on oil yield, specific gravity, saponification number and unsaponifiable matter. It also provided a significant effect on acid number and acid content caloulated as oleic acid. The dry-frying produced the highest of oil yield, a higher specific gravity, and a lower acid number, acid content and unsaponifiable matter based on the oil yield, specific gravity and acid number, the dry-frying method is the best pretreatment compared to the others.
STUDI RENDEMEN DAN KUALITA MOULDING BEBERAPA JENIS KAYU INDUSTRI INDONESIA (Study of moulding recovery and quality of several indonesia industrial woods) Ginoga, Bakir
Jurnal Penelitian Hasil Hutan Vol 11, No 5 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1542.037 KB) | DOI: 10.20886/jphh.1993.11.5.179-181

Abstract

The study describes moulding recovery and quality of seven Indonesian industrial wood species, i,e. meranti putih (shorea koordersii), sungkai (phenomena canescens jack). Cempaka (elmerillia ovalis dandy), dahu (dracontomelon dao), perupuk (solenospermum sp.) meranti merah (shorea sp.). and kapur (dryobalanops sp.).It is found that volume recovery varies from 38.7 to 80.2 per cent. An optimal allowances for moulding raw material are 3.0 mm in thickness and 9.6 mm in yidthSungkai, dahu, perupuk and kapur species produced the best moulding quality. Moulding quality of the other species is found to be of good quality.The processing of cempaka and meranti species, especially on their radial surface or quarter swan timber, should be undertaken carefully because of they have genetical interlocked grains.
ELASTISITAS SUBSTITUSI ANTAR FAKTOR PRODUKSI PADA INDUSTRI PENGGERGAJIA KAYU TROPIS (Elasticity of substitution between production factors on tropical sawn timber industry) Irawanti, Setiasih
Jurnal Penelitian Hasil Hutan Vol 11, No 5 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4068.168 KB) | DOI: 10.20886/jphh.1993.11.5.189-196

Abstract

The objective of this study is to estimate elasticity of substitution, coefficient, and technological parameter on sawn timber industry analyzed is limited to the sawmill belongs to the forest concession.This study used primary data. Analysis of data is conducted using CES production function data analyzed are cross-section primary data on wage, capital value, and production value, collected from 13 forest concession sawmills.The result of CBS production function shows that the elasticity of substitution 0 = 0,5247, it means that power of substitution between capital and labor in sawn timber industry is low. Technological coefficient A = 4.9654 shows that the increase of sawn timber production level is about 5 times of the increasing capital and labor inputs. Distribution parameter β = 0,7114 shows that relative contribution of capital input is about 71 % and labor input is about 29% on sawn timber production. Sawn timber industry is a capital intensive, which means that the increase of production is more effective through the increasing of capital input. The revenue of sawn timber industry is distributed more to the owner of capital than to labor.

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