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Jurnal Penelitian Hasil Hutan
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Articles 4 Documents
Search results for , issue " Vol 11, No 1 (1993): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
PULP SULFAT DARI BATANG KELAPA (Sulphate pulp from coconut trunk) Siagian, Rena M; Rosid, M
Jurnal Penelitian Hasil Hutan Vol 11, No 1 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (22252.036 KB) | DOI: 10.20886/jphh.1993.11.1.37 – 41

Abstract

This paper deals with the study of the influence of active alkali concentration to the properties of coconut trunk (cocos nucifera L.) sulphate pulping trials were conducted in laboratory digester with the cooking liquor circulation, using three levels of active alkali, i,e 14, 16 and 18% cooking sulfidity was 25%, wood to liquor ratio was 1:4, and maximum temperature was 165°c maintained for 120 minutes.Pulp yields from coconut trunks are ranged from 39.9 to 40.9% with permanganate number of 8.17 to 11.15. the increasing amount of active alkali has no significant influence to the yield, and overall physical properties of the pulp but tear factor. The higher active alkali concentration, the lower permanganate number and the higher alkali consumption. It is hope that the sulphate pulping of coconut trunk with active alkali of 16% would give adequate yield and processing properties.
ANALISIS KIMIA BEBERAPA JENIS KAYU DARI SULAWESI UTARA Pari, Gustan; Lestari, Setyani B
Jurnal Penelitian Hasil Hutan Vol 11, No 1 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1836.916 KB) | DOI: 10.20886/jphh.1993.11.1.7-11

Abstract

This paper reported the result of chemical analysis of ten wood species from north Sulawesi.The result shows that holocelluloce content ranges from 55,64 to 65,42 percent, cellulose from 41,89 to 52,44 percent. Cellulose content of serianthes minahassae, pangium edule, lophopetalum javanicum, aglaia versteeghii and bischoffia javanica are higher than other species. Lignin content varies from 22,59 to 31,36 percent , pentosan from 16,92 to 19,61 percent. Lignin and pentosan content of all wood species examined are moderate and low. Ash content varies from 0,05 to 1,83 percent, silica from 0,04 to 0,4 percent. The solubility in cold water ranges 1,80 to 4,79 percent, in hot water from 2,91 to 5,16 percent, in sodium hydroxide from 11,06 to 19,21 percent and in alcohol benzene (1 : 2) from 6,08 to 9,08 percent, The axtractive contents, especially those soluble in alcohol benzene, of all wood species are in high extractives component class.Based on the cellulose and pentosan content all 10 wood species from north Sulawesi are suitable as raw material for pulp and paper industry.
EFISIENSI BEBERAPA MODEL TUNGKU Hendra, Djeni; Pari, Gustan
Jurnal Penelitian Hasil Hutan Vol 11, No 1 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5249.712 KB) | DOI: 10.20886/jphh.1993.11.1.1 - 6

Abstract

The result of investigation of cook stove designs from Palembang, Yogyakarta and Bogor is reported in this paper. Fuel wood used were : Acacia mangium, Acacia auriculiformis and Leucaena glauca.The result shows that the dry wood consumption for high power phase ranges from 0,31 - 0,43 kg, dry wood consumption for low power phase ranges from 0,01 - 0,42 kg, high power phase from 6,12 - 13,23 KW, low power phase from 0,17- 2,98 KW, wood standard consumption from 0,20 - 0,25 kg wood/kg water, flexibility from 2.51 - 21,86 and efficiency ranges from 12,42 - 24,79 %.
KEADAAN JALAN DI DAERAH HUTAN NON-JATI JAWA TENGAH DAN POTENSINYA DALAM AKSELERASI EROSI TANAH Tinambunan, Djaban
Jurnal Penelitian Hasil Hutan Vol 11, No 1 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3897.052 KB) | DOI: 10.20886/jphh.1993.11.1.29 - 36

Abstract

An investigation on forest     road  conditions  in  non-teak forests    of Kedu  Utara and kedu selatan  Forest  Districts and their soil erosion  potentials   was conducted in early  1992.  The samples  of roads investigated  were  6 segments  in kedu   Utara and other 6 segments in Kedu selatan  in Kedu  Selatan,  each of 50 m long, Forest areas distribution and road inventory  were also investigated  and collected.     It is found  that forest  sections  in both forest  districts  are spread in  several regencies    and each section  consisted  of several relative small areas   scattered in many   locations  which are seperated by villages and other  land uses. This condition becomes the constraint in practicing good forest management in the area. The total  area  used for    rood  infrastructure (combined    graveled forest roads and public  roads)  in  Kedu utara and kedu selatan are 8.30 ha (0.03%) and 60.62 ha (0.14%) respectively.   This means that an average  land lost due to roading is only 0.08%.All factors in the universal soil loss equation (USLE) for the non- teak forest areas of kedu utara and kedu selatan are in the level of high scores in terms of soil erosion acceleration potential. It is noticed in the field that many segments of forest roads have been seriously eroded, especially along the berms and ditches, and on the fill and cut sections. Better planning and construction practices of forest roads are necessary to avoid forest land damage due to soil erosion.

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