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Jurnal Penelitian Hasil Hutan
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Articles 4 Documents
Search results for , issue " Vol 8, No 5 (1991): Jurnal Penelitian Hasil Hutan" : 4 Documents clear
OPrlMALISASI EKSPOR KAYU LAPIS INDONESIA: (Studi Kasus Pabrik Kayu Lapis di Propinsi Sumatra Selatan) Astana, Satria; Dwiprabowo, Hariyatno; Linda, Kirsfianti
Jurnal Penelitian Hasil Hutan Vol 8, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6076.421 KB) | DOI: 10.20886/jphh.1991.8.5.167-180

Abstract

•Of the forat  pfoductt in •rndonei~,. plywood haa an •im~rlant  1olitio1•in mee~•the  need for•t~   f~reiln, ~• By the end of 1986. the contribution of plywood to the tQ.tal export value of forat  pro~ucta ~the     brggest.It accounted for 61. 40~  In the (Qllowingyea.r., the a.,erage gr:owthper. ye~r.of  the•pbwood  expor.t volume was 54.98_%. .          .                                                                                   : The a.im •of  thia atudy   ~  to •know   how far   the a~tual value• of. the plywood  export  aB the fore!n exchange •Im reached the optimum.  To achieve the aim, two modelB (Model• I and Model II) of linier 11rograming were conatrueted. In •    thia caae, the study   waa conducted on the plywood  mill• in South Sumatra Province.                •                                                                                                                    •The rault   of  the study  revealB that the actual ualue of the plywood  export of thia region has not been optimum. The actual value of the export per month  waa USI 3 342 778 or USI 286. 1/m3. Meanwhile the export ~ue    per month based on the optimizing model of Model I and Model II iB  UBI 4 297 269 or US$824.  9/m3 and UBI 4 537 673 or UBI 343. 2/m3  respectively.                                                                                                         To reach the optimum  value of export the market area and the export volume• need to be reallocated;tJn increasein volume export  by 1.35%  (Model I) or by  1.04*  (Model II) can cause a significant incre•e  in the export value comjJtJl"ed with the ualue• gained by  the mill.Since the demand of  the Indonesian plywood  export iB prone to increaae, the reault of the optimizing modeZ. can be implemented. However, the optimizing reault of Model II iB preferred particularly with regard to the efficiency of f!&e forest re1ourceuse.
(Kerancuan • dalam beberapa metode penetapan Nitrogen Bagian 1. Penetapan beberapa senyawa Nitrogen) Sudradjat, R
Jurnal Penelitian Hasil Hutan Vol 8, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11258.128 KB) | DOI: 10.20886/jphh.1991.8.5.202-204

Abstract

Penetapan lhirteralnitrogen menurut metode MgO, Devarda,penetapan organik nitrogen menurut metode Kjeldahl dan penetapan  total  nitrogen menurut  metode  persulphat adakzh sangat umum  dan digunakan aecara  luaa di aeluruh dunia, karena sederhana dengan ketelitian yang memenuhi ryarat. Namun hasil pengamatan akhir-akhir ini menunjuk- kan  bahwa tidak   aemua jenis  organik nitrogen atau  mineral nitrogen dapat ditetapkan kadarnya aecara  teliti dengan menggunakan metode analisis te18ebut.Penelitlan..  ini bertujuan untuk  mengetahui ketelitian  penetapan kadar nitrogen dengan metode  te18ebutdi ataa untuk  11 jeniB aenyawa organik dan  mineral nitrogen. Hasil penelitian menur.;ukkan bahwa aenyawa azo •dan  benzo aangatrendah ketelitiannya bila ditetapkan dengan metode Kjeldahl dan ge1Bulphat. Senyawa nitro dan nitroso ketelitian- nya rendah bila ditetapkan dengan metode. Kjeldahl, tetapi sedikit lebih tinggi bila ditetapkan dengan metode pe18ulphat.
IDENTIFIKASI JENIS KAYU PERDAGANGAN DAN KURANG DIKENAL YANG DIPERDAGANGKAN DI DKI JAKARTA Rulliaty, Sri; Sumarliani, Nenny
Jurnal Penelitian Hasil Hutan Vol 8, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2362.65 KB) | DOI: 10.20886/jphh.1991.8.5.196-201

Abstract

A survey on wood species marketed in the Jakarta Mebopolitan has.  been conducted and the reault reporled in this paper. The result shows that there are all together 35 wood grouping available• in the market. Each group consiiitedof one or more species with similar (or almost) colour, density and pore density.
USE OF BIOBED PERCOLATION FILTERS FOB W~ATER TREATMENT Penggunaan saringan perkolasi dengan lapiaan biomaa wituk "1n}ernlhon air lfmbah Sudradjat, R
Jurnal Penelitian Hasil Hutan Vol 8, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7837.592 KB) | DOI: 10.20886/jphh.1991.8.5.185-191

Abstract

Penelitian ini bertujuan untuk mempelajari upa~a rek~di     air limbala•• rumab tanggaya111; di~flll    .melalui/arl,,,.n pipa pembuangdn; ke  sungai yang b_iaaa me1Uadi  sumber polui   air sungai padia .. bebe~. •ko.ta b.aar.   UpoYf. fel!lamai dila,kaanakande1tllan cam Jierkolaaiair limbah melalui lapi80n biomaa yaitu gambut, aerpih kayu dan kulit kayu eet.bal SO cm. Serpih ddn IHtlit  kayu yang digunakan adalah dari jenis kayu Pinua sylvestril.   ••                       .                 ..Hasil -nelitian  menunjukkan bahwa kulit kayu memberikan air perkolaai terjernih (tidak be~rna)    dibandinikan dengan• gambut dan se,.Pih kayu  (kuning)."Penurunan  COD  yang cukup  beNrti di~roleh JHlda.penggunaanpniolator kulit  kayu  (10 %)  dan gambut  (50 %). Penurunan   kadar ph°phat untuk  ketiga perkolatpr gambut menwrunkan, 80~ ~  . kulit kayu 61 % dan aerpih kayu 54 %. Penurunan   kadar amonium bervaria~fantara60 -   10 %, dmaanapenuru,..,. a~ aium pada penggunaan perliolator gambut diikuti peningkatan kadar NO~--N   yang menunjukkan terjadinya nltriffkaei. Perkolator gambut menunjukkan kapaaitaB desinfeksi tertinggi harena dalaift waktu 6_minggri sudah terjadi kematian total koloni fecal streptococci dan fecal coli. Perkolator kulit kayu terendah dalam penurunan junJlah koioni fecal coli.Penurunan.  COD  dan organik--N untuk  ketiga perkolator lebih tinggi untuk   ,.Hydraalik •l<)ading rate"  (HLR) 10 dibandi111 2,6 crn/hari, •""H -"nu~n   total-N  lebih tinggi pada. HL!. ~,6 diba!"ing 1fo cm~hari. Penilalait lnlalitatif rMilon,/uk.perkolator  gambut yang terbaik- ditirvau 4an k_.hatan  lqltungan. DeftlGn meng-kombinaihn,,,.,..,,...pl~-1ambudt an kulit kayu diharapkan akan meningkatkan kualitas air

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