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Jurnal Penelitian Hasil Hutan
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Articles 3 Documents
Search results for , issue " Vol 21, No 3 (2003): Buletin Penelitian Hasil Hutan" : 3 Documents clear
PRODUKSI BIOGAS DARI LIMBAH PENGOLAHAN KELAPA SAWIT DENGAN PROSES FERMENTASI PADAT Sudradjat, R; Y, Erra; K, Umi; K, Evi
Jurnal Penelitian Hasil Hutan Vol 21, No 3 (2003): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2003.21.3.227-237

Abstract

The aim of this investigation was to evaluate the characteristic of biogas produced from the wastes of palm-oil solid fermentation processing, the assessment on its potential prospect was also studied. The wastes consist of the mixture of empty bunches, pericarp, and sludge. The mixing ratio in weight was 1.3: 1.2: 1.0 respectively. The conditions implemented in the fermentation process were temperature (55° C), and content of dry matters or substrate (i.e. mixture of empty bunches, pericarp, and sludge) in the fermentation digester (35 %). The fermentation was conducted either in batch or continuous system. The weight ratios between substrate and inoculum were consecutively 25 : 500, 50 : 500, 75 : 500, and 100 : 500.Results revealed that fermentation in the batch system at 25 : 500 ratio as such afforded biogas with the highest yield (145 ml per liter-hour) and the most intense degradation on the organic matters (32.3 % VS). meanwhile, the fermentation using continuous system at 25 : 500 brought out biogas with the highest production (1623.7 ml per liter-d). Keywords : Palm oil processing, wastes, fermentation, substrate, and inoculum.
ISOLASI DAN IDENTIFIKASI MIKROORGANISME DALAM ARANG KOMPOS Komarayati, Sri; Indrawait, Ida
Jurnal Penelitian Hasil Hutan Vol 21, No 3 (2003): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2003.21.3.251-258

Abstract

The population and diversity of microorganism in compost charcoal were isolated and identified. The microorganism were prepared in nutrient agar and saboraud agar media. The results revealed that the total population in each gram of compost charcoal were respectively counted 1.78 x 1012 for bacteria and 9.23 x 109 for fungi. Three species of bacteria and fungi were respectively identified; i.e Species II, Bacillus sp and Species V; and Penicillium sp, Fusarium sp and Species A. 
HUBUNGAN ANTARA BERAT DENGAN VOLUME KAYU ACACIA MANGIUM DI SUBANJERIJI, SUMATERA SELATAN: STUDI KASUS DI PT MHP Sianturi, Apul
Jurnal Penelitian Hasil Hutan Vol 21, No 3 (2003): Buletin Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4820.871 KB) | DOI: 10.20886/jphh.2003.21.3.203-210

Abstract

This study evaluated a method for estimating relationship between weight and volume of log of Acacia mangium. DBH of 50 trees (planted in 1991) in a sample plot in Subanjeriji had been measured, and the trees were then felled and bucked into 2.50 m logs upto a limit diameter of 8 cm. Diameter of each log was measured al both ends, and diameter of log was the mean of both ends diameter. The volume of logs was calculated by using formula of V = π R2 L. The mean of the log volume were 0.0485 m3 and 0.039 m3 for logs with bark and logs without bark respectively, and the mean of the log weight were 0.02846 ton and 0.025298 ton for logs with bark and logs without bark respectively. The relationship between the weight and volume of logs could be drawn by the formulas: B1 = 0.65 V, with t = 100.89 and r = 0.93B2 = 0.59 V1, with t = 94.61 and r = 0.92B3 = 0.56 V, with t = 58.18 and r = 0.82Since t0,01 is equal to 2.338 on 386 degrees of freedom, the coefficient of the three regressions are highly significant. Where B1 is the weight of logs with bark, and B2, and B3 are both the weight of logs without bark, and V and V1 are the volume of logs with and without bark respectively. The smallest convertion from volume to weight (density) is 0,56 ton/m3 that is for weight of logs without bark to logs with bark. Since the raw materials for pulp industry are logs without bark, the convertion from volume of logs with bark lo weight of logs without bark should use density value of 0.56 ton/m3.The staplemeter unit (sm) used by PT Musi Hulan Persada (PT MHP) as a tool for measuring the logs volume is miss used for the mean of tonage of weigt which transported by truck was 43.15 tonnes with the mean of estimated log volume was 77.65 sm. By using density of 0.56 ton/m3 the mean logs volume should be 76.75 m3 instead of 77.65 sm. Therefore the estimated volume should be in m3 instead of sm.

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