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PEMBUATAN ARANG AKTIF DARI BATUBARA Gustan Pari
Jurnal Penelitian Hasil Hutan Vol 17, No 4 (2000): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5121.187 KB) | DOI: 10.20886/jphh.2000.17.4.220-230

Abstract

Dalam tulisan ini dikemukakan hasil penelitian tentang pembuatan arang aktif dari batubara dengan cara aktivasi uap kimia. Tujuan penelitian ini adalah untuk mengetahui pengaruh suhu aktivasi dan konsentrasi bahan pengaktif terhadap hasil dan kualitas arang aktif Proses pembuatan arang aktif dilakukan dalam retor ba}a tahan karat yang dilengkapi dengan pemanas listrik pada suhu 700°C, 800°C, 900°C dan sebagai bahan pengaktif digunakan LaHutan NH4HC03dengan konsentrasi masing-masing 0,0; 0,5; 1,0; 3,0; 5,0 dan 10,0%.Kualitas a rang aktif batubara yang baik, dihasilkan dari arang aktif yang dibuat pada suhu 800°C dengan konsentrasi NH4HC03 5,0 % yang menghasilkan rendemen sebesar 84,5%, kadar air 5,77%, abu 19,74%, zat terbang 6,60%, karbon terikat 73,66%, daya serap terhadap yodium 424,20 mg/g dan daya serap terhadap benzena sebesar 10,17%. Dilihat dari besamya daya serap terhadap yodium dan kadar abu arang aktif batubara, maka bahan pengaktif NH4HC03 kurang baik untuk digunakan sebagai bahan pengaktif dalam pembuatan arang aktif dari batubara. Namun demikian arang aktif dari batubara ini dapat digunakan untuk menjemihkan air.
SIFAT PEMESINAN ENAM JENIS KAYU INDONESIA Bakir Ginoga
Jurnal Penelitian Hasil Hutan Vol 13, No 6 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1121.751 KB) | DOI: 10.20886/jphh.1995.13.6.246-251

Abstract

The quality of machining properties of six Indonesian wood species, i.e. meranti merah (Shorea selanica BI .), medang lesa (Cinnamomum parthenoxylon Meissn.), dahu (Draconto-melon mangiferum BI.), kaya (Khaya anthoteca Cdc.), bawang (Melia excelsa Jack.), and merawan (Hopea odorata , from Darmaga Experimental forest, has been investigated. The testing was carried out based on air dried specimen. The results revealed that the planing and moulding quality varies from good (II) to very good classes(1); turning and sanding belong to good class (II). while boring quality varies from medium (III) to good (II) classes.
BIODEGRADASI KOMPONEN KIMIA PADA LIMBAH LIGNOSELU- LOSA OLEH JAMUR PERUSAK KAYU (Biodegradation of wood chemical components in lignocellulosic wastes by white­rot fungi) Sri Komarayati; TjuTju Nurhayati; Gusmailina Gusmailina
Jurnal Penelitian Hasil Hutan Vol 11, No 2 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3115.656 KB) | DOI: 10.20886/jphh.1993.11.2.57-64

Abstract

This paper reports the result of an experiment on the treatment of different forestry wastes, i.e., the sawdust of Hevea brasiliensis Pinus merkusii, Paraserianthes falcataria and the leaves of melaleuca leucodendron with Schizophyllum commune Fr for 7 weeks.The purpose of this study is to assess the effect of white-rot fungi inoculation to the decrease of chemical components like cellulose, lignin and hemicellulose.the results reveal that after treating for 7 weeks, sengon sawdust still has a very .high cellullose content of 22.55% in rubber tree sawdust, lignin and hemicellulose contents are 32.66% and 47.39%, respectively.After decreasing chemical components. Lignocellulose waste could be fermented by solid state fermentation for biogas.
PENELAAHAN SIFAT PRIORITAS PEMANFAATAN JENIS TANAMAN UNTUK KAYU BAKAR Rachman Effendi; Suwidji Basuki; Han Roliadi
Jurnal Penelitian Hasil Hutan Vol 4, No 4 (1987): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4741.127 KB) | DOI: 10.20886/jphh.1987.4.4.35-40

Abstract

There is a need to classify fire  wood for flue/  based on energy content.   This research is conducted  to categorized fire wood species using discriminant  analysis.Data of which collected from  each of  research areas are plant  varieties for  fire  wood,  age classification,  annual  volume  increase,   specific gravity,  calor value and volume  of  extractive  elements.Variety of  woods used for fire  wood are Akasia  (Acacia   auriculiformis),   Akasia  (Acacia decurrens),  Kaliandra  (Calliandra  callothyrsus), Gamal  (Gliricidia  maculata),  Kemlandingan   (Leucaena  glauca),  Turi  (Sesbania   grandiflora)   and  Jati  (Tectona  grandis). For  the purpose   of analysis of the type of relationship  between  annual volume  increase (X1), specific  gravity  (X2),  calor value (X3),  volume  of extractive  elements (X4) and the adaptation order of plant  varieties for fire  wood is clasified by the discriminant function.The function is also used for  determining adaptation  order of utilization  of plant  varieties for fire  wood.Based on the discriminant  analysis it can be expressed  as:Yj = 0.2148X1j + 9.7184X2j + 0.7231 X3j - 6.7121 X4j..................................................................(1).                                               The result of average substitutions of annual volume increase, as specific gravity,  ca/or value increase and volume of extractive elements  decreased as described by the equation  (I).  It can be said that (the adaptation  order of plant  varieties for  fire  wood) produced  from   the most  to the least based on its number of heat of combustion  at the plantation  age 2, 3 and 4 years are Akasia   (Acacia decurrens), Akasia  (Acacia auriculiformis), Kaliandra  (Calliandra callethyrsus),   Gamal  (Gliricidia  maculata),  Kemlandingan  (Leucaena   glauca),  Turi  (Sesbania  grandiflora)   and  Jati (Tectona  grandis).
BAGAN PENGERINGAN BEBERAPA JENIS KAYU HUTAN TANAMAN INDUSTRI Efrida Basri
Jurnal Penelitian Hasil Hutan Vol 6, No 7 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3902.918 KB) | DOI: 10.20886/jphh.1990.6.7.447-451

Abstract

This paper  describes  a  kiln  drying  experiment  of  wood,  with several species  that proposed  as industrial  timber  estate. There  are  eight  species  were  investigated five of  which taken from natural forest, while the  others  are from  plantation. The  experiment  was conducted in  two stages,  quick drying  tests in an electrical oven  and  actual  drying  in two small dry kilns. Result of quick drying tests are rough kiln schedules and the  schedules  were  tested  in  the small  kilns.Drying  properties of  wood  taken  from  natural   forest  are practically   similar  to  those  of plantation stands, Tengkawang, begontoi, kuntui, damar mata kucing and jeungjing   have  the  same kiln  drying  schedule.
KEAWETAN KAYU TUSAM (Pinus merkusii Jungh. et de Vr.) DAN MANGIUM (Acacia mangium Willd.) SETELAH FURFURILASI Jamal Balfas; Ginuk Sumarni
Jurnal Penelitian Hasil Hutan Vol 13, No 7 (1995): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1541.841 KB) | DOI: 10.20886/jphh.1995.13.7.259-265

Abstract

Two regrowth wood species, i.e. tusam (Pinus merkusii Jungh. et de Vr.) and mangium (Acacia mangium Wild.) were used in this study. Specimens measuring 25 mm x 25 mm x 50 mm and 5 mm x 25 mm x 25 mm were prepared for testing against dry-wood termite (Cryptotermes) and subteranean termite (Coptotermes) respectively. All specimens were air-dried  to approxi mately 16-18%  moisture content. One group of the specimens was further  oven - dried to reach moisture  content of  6-8%.  Furfurylation  was carried out by soaking  wood specimens for 24 hours  in a 98% fuifuryl  alcohol  solution  containing  0.35%  (v/v) of  ZnCl2  as catalyst. Furfurylated specimens were then cured at  l000C  for 48 hours.  Control and treated specimens were exposed to dry-wood and subteranean termites for 12 and 4 weeks respectively.Treated specimens revealed a weight gains of  10 to 40 % depending on size of specimens and  wood species. Speciesmens usd for testing drywood termites gained less weight than those of  subteranean termites. Tusam  specimens  markedly  showed  a  higher  weight  gain  than mangium.  Furfurylation using method 1 resulted in comparable weight gain to that of method 2. Control specimens of tusam an mangium are both encountered susceptible to dry-wood and subteranean  termite  attacts.  Tusam  had  less initial durability  against  Coptotermes  than mangium, but the wood species had a similar durability against Cryptotermess.  The modified wood with furfuryl alcohol abviously possessed an improved durability  upon the two termites. Tusam specimens gained more durability improvement than mangium.
STABILISASI DIMENSI PADA KAYU TANAMAN KARRI (EUCALYPTUS DIVERSICOLOR) DAN JARRAH (E. MARGINATA) BAGIAN I : ASETILASI Dimensional stabilization on regrowth karri (Eucalyptus diversicolor) and jarrah (E. Marginata) Part I : Acetylation Jamal Balfas
Jurnal Penelitian Hasil Hutan Vol 11, No 3 (1993): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1397.699 KB) | DOI: 10.20886/jphh.1993.11.3.89-91

Abstract

Wood blocks of karri and jarrah  measuring 10 mm (radial) x 25 mm (longitudinal) x  100 mm (tangential) were ovendried for  48 hours at 105°C prior  to treatment.  Acetylation  was carried out in 250 ml- reactor  vessels using a 25  %  (v/v) solution of acetic anhydride in xylene.  Three reaction times, i.e., 8, 16 and 24 hours were used for  each wood type. Treatment results are expressed in terms  of weight gain (VG) and volumetric gain (VG). The ability  of treatment to restrict  dimensional changes is expressed as anti­ swelling efficiency (ASE). Results showed that the weight and volume of both eucalypts specimens substantially increased after acety- lation. In all cases, karri specimens showed higher weight gain, volumetric gain and ASE than jarrah.  The effectiveness of acetylation increased with increases in reaction time. Volumetric swelling reduction of more thaw 80% was found in the two regrowth eucalvots.
GASIFICATION OF CHARCOAL IN FLUIDIZED BED FOR MANUFACTURING ACTIVE CARBON Hartoyo Hartoyo
Jurnal Penelitian Hasil Hutan Vol 5, No 1 (1988): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4106.062 KB) | DOI: 10.20886/jphh.1988.5.1.17-22

Abstract

Percobaan gasifikasi  arang dalam fluidized bed untuk  pembuatan arang aktif ini, dilakukan dalam rangka kerjasama penelitian  ATA 251 Indonesia  - Belgia yang  diselenggarakan  oleh Pusat  Penelitian  dan Pengembangan  Hasil Hutan, Bogor.Aspek  yang dibahas dalam penelitian  ini adalah kondisi pengolahan  dengan  maksud  untuk  mempelajari  pengaruh  suhu  dan waktu  reaksi aktivasi terhadap rendemen  dan kualitas  karbon  aktif yang dihasilkan.  Kondisi perlakuan  yang diberikan pada percobaan  ini adalah temperatur aktivasi tiga tingkat (731°C,  767°C, 827°C) dengan masing-masing  waktu reaksi lima tingkat  (10, 20, 30, 40, 50 menit).  Kondisi  gasifikasi  untuk aktivasi  dibuat  tetap yaitu  laju alir uap 0,41 kg/jam dan nitrogen sekitar  I,70 kg/jam.Hasil penelitian  menunjukkan  bahwa  semua  kondisi  perlakuan  yang  diberikan   dapat  menghasilkan karbon  aktif  kualitas  baik  yang ditetapkan  oleh daya serap terhadap jodium  yaitu 510 sampai 1068 mg/g.  Kualitas tersebut  termasuk  dalam standar perdagangan  yang  dibuat oleh  "American Water Work Association" (AWWA) yaitu  sebesar tidak  kurang  dari 500 mg/g.Kondisi  optimum  proses  dicapai pada suhu  827°C dengan  waktu  reaksi 10 menit.  Pada  kondisi ini memberikan   rendemen  karbon  aktif 61,7% dengan daya serap jodium 687 mg/g.   Selanjutnya   waktu  reaksi optimum terhadap  daya serap karbon  aktif  hasil untuk  masing-masing perlakuan  suhu  reaksi kelihatannya  sama yaitu  sekitar  40 menit.Konsumsi  uap optimum  dalam percobaan  ini adalah 3,7 kg untuk  tiap kg karbon  aktif  hasil. Konsumsi uap yang diperlukan  tersebut lebih rendah jika dibandingkan   dengan  kebutuhan   uap  untuk  produksi karbon  aktif  skala  komersial  dengan  cara kiln  berputar  di Jerman  yang dilaporkan  oleh Hormat  (1952) yaitu 8 kg uap untuk 1 kg karbon  aktif.    
PEMANFAATAN LIMBAH LIGNOSELLULOSA UNTUK GAS BAKAR DENGAN METODE FERMENTASI Tjutju Nurhayati Syahri
Jurnal Penelitian Hasil Hutan Vol 6, No 7 (1990): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7337.821 KB) | DOI: 10.20886/jphh.1990.6.7.452-458

Abstract

The gasification of  lignocellulosic waste  was conducted by fermentation method at  thermophilic condition  (45 -55°C).  The  material  was  obtained   from vegetable  market  at Bogor.  The gasification trial  made  in pilot  scale reactor  of having  capacity  of 30 m3 and equipped with gas holder of 50 m3, steam boiler of 50 kg/h and dual generator  of  17.5 kVA. The waste  was cut first become 1-3 cm  long on choper  of  0.3  m3/h  volume. Parameter  of  fermentation  choosed  on 10 m3  volume  actif  and  retention time  was 20.9 daysThe result revealed that  thermophilic fermentation of waste which had total solid about 22.3 % and ash about 33.9 % and  feeding about 478 kg fresh  waste per day produced   biogas about  28.7 m3 per day  on methane  content about 54.5 %, productivity  about 2.9 m3  per  m3  reactor per  day  and  efficiency  of  conversion  about 57  %.The total  of  fuel  consumption  along fermentation   per day was 4.34 hours of man hours  work  about  1.16 MJ and it was   from 1 tube  LPG  of  12.5 kg and  14.31 diesel. LPG  was used for  steam  boiler can  be changed  with  31.2 m3 biogas per  day. In  this  case the production of  biogas per day cannot be dropped for  the  total  of  fuel  consumption   even  steam boiler.  The  fermentation  of 22965  kg wet lignocellulosic   waste produced  gas bio about  1380 m3 and wet  residu for compos raw material  about  16430  kg. The  biogas production  was equavalent  with  44 LPG  container of  12.5 kg.
PENERAPAN METODE TREE LENGTH LOGGING SKALA OPERASIONAL DI AREAL TEKNIK SILVIKULTUR INTENSIF (STUDI KASUS DI PT SARMIENTO PARAKANCA TIMBER PROVINSI KALIMANTAN TIMUR) Maman Mansyur Idris; Soenarno Soenarno
Jurnal Penelitian Hasil Hutan Vol 33, No 1 (2015): 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.2015.33.1.19-34

Abstract

Metode tree length logging sebagai alternatif cara pemanenan kayu merupakan upaya untuk meningkat-kan efisiensi pemanfaatan hasil hutan kayu dan kelestarian hutan produksi alam. Saat ini kontribusi produksi kayu bulat hutan alam semakin menurun akibat masih borosnya proses pemanenan dan makin terbatasnya luas hutan alam produksi. Penelitian ini bertujuan untuk mengetahui kinerja penerapan metode pembalakan kayu sepanjang mungkin dalam skala operasional. Penelitian dilaksanakan pada areal hutan yang dikelola dengan teknik silvikultur intensif (SILIN) di PT Sarmiento Parakanca Timber (SARPATIM), Kabupaten Kotawaringin Timur, Provinsi Kalimantan Tengah. Pengumpulan data melalui pengamatan dan pengukuran langsung di lapangan meliputi produktivitas kerja dan biaya penebangan dan penyaradan, limbah pembalakan, faktor eksploitasi (FE) dan kerusakan tegakan tinggal. Hasil penelitian menunjukkan bahwa produktivitas penebangan meningkat menjadi 60,535 m /jam dan produktivitas penyaradan sebesar 31,931 m /jam. Selain itu, penerapan metode tree length logging dapat memperkecil biaya penebangan menjadi Rp 1.604,36/m dan penyaradan Rp 21.142,75/m , meningkatkan nilai FE mejadi 0,93 dan dapat menekan kerusakan tegakan menjadi sebesar 20,70%.

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