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Jurnal Penelitian Hasil Hutan
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Articles 4 Documents
Search results for , issue " Vol 5, No 1 (1988): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
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 | 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.    
ANALISIS KIMIA 75 JENIS KAYU DARI BEBERAPA LOKASI DI INDONESIA Syahri, Tjutju Nurhayati
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 | DOI: 10.20886/jphh.1988.5.1.6-11

Abstract

The result of chemical analyses of 205 wood species has been published in previous reports.  The analyses comprised determination of content of cellulose, lignin, pentosan, ash, solubility in alcohol benzene 1:2, hot and cold water and In 1:2 sodium hydroxide. As a continuation of the above work, the result of chemical analyses of 75 wood species is presented in this report.The analyses reveal that cellulose content ranges from  40.58-62.50  percent, lignin from  21.10-35.03 percent, pentosan from 8.90-19.96 percent and ash from 0.08-3.40 percent. The solubility in alcohol benzena 1  :  2 ranges from  0.54-11.90 percent, hot water 0.39-12.95 percent and 1% natriumhidroxide from 0.50-22.27 percent. There are 43 wood species with cellulose content above 45 percent, 8 species with lignin content above 33 percent, and there are respectively 25 and 39 wood species with solubility in alcohol benzena 1 : 2 and hot water above 4 percent.
KECELAKAAN KERJA DALAM KEGIATAN EKSPLOITASI HUTAN DI KALIMANTAN TENGAH Idris, Maman Mansyur; Soenarno, Soenarno
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 (5468.97 KB) | DOI: 10.20886/jphh.1988.5.1.31-36

Abstract

Logging  in Central Kalimantan  is generally mechanized,  utilizing  modern  machines.   Involved  in these activities  are local labourers,  many among  which have not benefited  any adequate  training for  their jobs. They are originally farmers  or farm  labourers,  and most  of them had very little,  if any education.  It is therefore,  not surprising  that  they cant  operate or handle  the machines properly.The logging industry  is characterized  by hard  work requiring,  high skill  and alertness.Shortcomings in these qualities leads to accidents caused by inumerable factors that are constantly  present  in the tropical  high forests. To develop safety programs research is needed to gather information on work accidents at various logging companies through  the years. The aim of  this study  is to find  out about  the effects  of  mechanized  logging systems  on accident  occurrences. The study  was conducted   in Central Kalimantan, resulting  in the following conclusions  :1.    Accident  frequency rate according  to ANSI  standard for 500 labourers ranges from 95 to 151 accident per million  work hours.2.    Accident  severity rate according  to ANSI  standard for 500 labourers ranges from 4, 000 to 8, 000 days  lost per  million  work hours
SERBUK BABAKAN AKASIA SEBAGAI PEREKAT PAPAN PARTIKEL Sumadiwangsa, Suwardi; Widarmana, Sadan; Putra, Ratmaja Eka; Memed, Rozak
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 (3802.775 KB) | DOI: 10.20886/jphh.1988.5.1.12-16

Abstract

This  work  investigates  the use of acacia  (Acacia decurrens Willds.)  bark  powder   mixed   with  paraformaldehyde as an adhesive for particleboard. The treatments included powder  contents  of 10, 12, and 14% of the oven dry  weight basis.  The paraformaldehyde   employed  has also 3 levels i.e. 20, 30, and 40%. Material used for this study  was the jeungjing (Albizia falcataria  (L.) Fosberg.) flakes.   The boards were made in the Forest Products  Research  Centre laboratory  to determine  their physical  and mechanical properties.The effect  of paraformaldehyde  content  alone on the overall particleboards  properties  was not significant.  On the other hand,  the effect  of acacia bark powder  contents  on the particle board properties were significant on water absorption, MOR  and MOE after soaking.  Those qualities were better  with higher powder  content. 

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