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Pengelolaan Sampah Rumahtangga Berbasis Komunitas: Teladan dari Dua Komunitas di Sleman dan Jakarta Selatan Dwi Utami, Beta; Siswi Indrasti, Nastiti; Hadi Dharmawan, Arya
SODALITY: Jurnal Sosiologi Pedesaan Vol 2, No 1 (2008)
Publisher : SODALITY: Jurnal Sosiologi Pedesaan

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Abstract

Studi kasus pengelolaan sampah rumahtangga di Wedomartani (Sleman, Yogyakarta, Daerah Istimewa) dan Banjarsari (Jakarta Selatan) memberikan perspektif alternatif untuk meminimalisasi timbunan sampah yang dikelola oleh pemerintah melalui skenario daur ulang sampah dengan mengkombinasikan aspek teknis, ekologi, ekonomi, sosial budaya, kebijakan dan kelembagaan. Tujuan dari kajian ini adalah untuk mengetahui efektivitas dan efisiensi pengelolaan sampah rumahtangga dari sumbernya di Wedomartani dan Banjarsari; 2) untuk membuat sintesis pola pengelolaan sampah berbasis komunitas; 3) untuk menguji dan mengevaluasi efektivitas dan efisiensi pola dari kedua studi kasus tersebut. Penelitian ini dilakukan dari bulan Juni 2005 sampai Agustus 2006. Pengumpulan data dilakukan melalui wawancara, observasi, dan pengambilan sampel. Analisis data dilakukan secara deskriptif meliputi analisis efektivitas biaya, analisis regresi, analisis varian dan t-test. Pengelolaan sampah berbasis masyarakat memberikan beberapa keuntungan yakni : 1) mengurangi 57 persen sampah 70 persen dari total jumlah sampah; 2) efisiensi biaya sebesar 23 persen sampai 37 persen dibandingkan pengelolaan secara konvensional; 3) peningkatan nilai ekonomi dengan penjualan barang daur ulang, pelayanan pelatihan daur ulang dan bentuk-bentuk diversifikasi yang lain; 4) menciptakan harmoni sosial antar banyak pihak. Implementasi kedua pola ini di Bogor belum dapat dilakukan secara optimal karena belum terpenuhinya prasyarat untuk mencapainya. Tingkat biaya operasional juga belum dapat dicapai secara menguntungkan.
Perolehan Kembali Seng Dari Limbah Industri Galvanis Sebagai Seng Asetat Agustina, Siti; Indrasti, Nastiti Siswi; Suprihatin, Suprihatin; Rochman, Nurul Taufiqu
Jurnal Kimia dan Kemasan Vol. 36 No. 1 April 2014
Publisher : Balai Besar Kimia dan Kemasan

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Abstract

Seng dross merupakan hasil samping dari industri pelapisan logam (galvanis) dengan proses hot-dip dan mempunyai kandungan seng yang cukup tinggi. Hasil samping ini dapat digunakan sebagai bahan baku seng asetat. Seng asetat digunakan sebagai bahan tambahan makanan, suplemen, obat-obatan, precursor, dan pelega tenggorokan. Penelitian ini bertujuan untuk memperoleh kembali seng dari seng dross untuk menghasilkan seng asetat. Seng asetat tersebut akan digunakan sebagai precursor. Proses ekstraksi seng dross dilakukan dengan asam asetat glasial pada kondisi proses, yaitu waktu ekstraksi 1 jam, 2 jam, dan 3 jam, suhu ekstraksi 130 oC, 150 oC, dan 170 oC, serta konsentrasi asam asetat glasial 20%, 40%, dan 60%. Hasil ekstraksi berupa seng asetat dianalisis untuk mengetahui kadar seng dan karakteristik kristal. Hasil penelitian menunjukkan bahwa kondisi proses ekstraksi yang terbaik diperoleh pada suhu 130 oC, konsentrasi asam asetat glasial sebesar 60%, dan waktu proses ekstraksi selama 1 jam. Seng asetat yang diperoleh mengandung 75,39% seng dan kristal seng asetat mempunyai intensitas 5800 counts. 
PEMULIHAN MINYAK SAWIT DARI SPENT BLEACHING EARTH DENGAN METODE EKSTRAKSI REFLUKS Muslich; Sri Utami; Nastiti Siswi Indrasti
Jurnal Teknologi Industri Pertanian Vol. 30 No. 1 (2020): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2020.30.1.90

Abstract

Spent Bleaching Earth (SBE) merupakan limbah hasil pemucatan minyak yang mengandung 20-40% minyak sehingga perlu dilakukan pemulihan. Tujuan penelitian ini untuk menganalisis pengaruh rasio bahan/pelarut terhadap rendemen dan mutu minyak serta mendapatkan perlakuan terbaik dalam proses ekstraksi minyak dari SBE. SBE yang digunakan berasal dari proses pemucatan crude palm oil (CPO) (bahan A) dan SBE dari proses pemucatan refined bleached deodorized palm oil (RDPO) yang telah disimpan selama tiga bulan (bahan B). Proses ekstraksi menggunakan metode refluks dengan pelarut heksan teknis selama 3 jam. Penelitian ini menggunakan rancangan acak lengkap faktor tunggal dengan perlakuan rasio bahan SBE/pelarut (1:4, 1:6, 1:8) (b/v). Hasil penelitian menunjukkan karakteristik sampel A memiliki kadar minyak 17,17%, kadar abu 31,27%, kadar volatil 33,49%, pH 3,21, dan kadar air 0,72%. Sampel B memiliki kadar minyak 38,28%, kadar abu 48,33%, kadar volatil 47,33%, pH 7,75, dan kadar air 1,00%. Rasio antara bahan sampel A terhadap volume pelarut mempengaruhi rendemen dan densitas minyak, sedangkan rasio antara bahan sampel B terhadap volume pelarut hanya mempengaruhi densitas minyak. Perlakuan terbaik untuk rasio bahan terhadap volume pelarut sampel A adalah 1:8 dengan menghasilkan rendemen minyak tertinggi 88,31%. Minyak yang dihasilkan memiliki bilangan asam 84,44 mg KOH/g, densitas 0,89 g/cm3, viskositas 4,91 cSt, dan bilangan iod 48,07 g iod/100 g. Rasio bahan terhadap volume pelarut terbaik untuk sampel B sebesar 1:8 dengan rendemen minyak tertinggi yaitu 75%. Minyak yang dihasilkan memiliki bilangan asam 2,77 mg KOH/g, densitas 0,87 g/cm3, viskositas 4,36 cSt, dan bilangan iod 40,61 g iod/100 g. Keywords: extraction, palm oil, recovery, reflux, spent bleaching earth
KINERJA KARBON AKTIF DARI KULIT SINGKONG DALAM MENURUNKAN KONSENTRASI FOSFAT PADA AIR LIMBAH LAUNDRY Illah Sailah; Fitri Mulyaningsih; Andes Ismayana; Tyara Puspaningrum; Anis Annisa Adnan; Nastiti Siswi Indrasti
Jurnal Teknologi Industri Pertanian Vol. 30 No. 2 (2020): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2020.30.2.180

Abstract

Cassava peel has high carbon content. It becomes potential as an adsorbent in adsorbing laundry phosphate compounds. Utilization of cassava peel into activated charcoal is an effort to reduce waste from the cassava processing industries. This study used two types of activated carbon from cassava peel, i.e. acid activated charcoal using HCl 0.4 M and alkaline activated charcoal using KOH 0.4 M. The objectives of this research were to determine: (1) the optimum contact time of adsorption at 30, 60, 90, 120, 150, and 180 min treatment time; (2) the optimum pH value of adsorption at pH 4, 6, 8, and 10; and (3) the adsorption capacity using adsorbent concentration treatment of 0.5%, 1%, 1.5%, 2%, and 2.5% (w/v). The experimental design used was a Single Factor Randomized Block Trial Design, ANOVA-DNMRT statistical analysis, and linear graphic for descriptive analysis. The analysis of the activated charcoal showed that water contents of the acid activated charcoal and the alkaline activated charcoal were 3.49% and 2.89%, respectively; the ash contents were 6.78% and 9.03%, respectively. The water content and ash content meet the standard of SNI 06-3730-1995. The performance test showed that the optimum contact time and pH of acid activated charcoal were 30 min and pH 4, while the alkaline activated charcoal was 90 min and pH 6. The adsorption capacity of acid active charcoal was 0.26 mg/g and the adsorption capacity of alkaline active charcoal was 0.49 mg/g. Activated carbon from the cassava skin can be used as an adsorbent to reduce phosphate concentrations in laundry waste. Keywords: activated charcoal, adsorption, cassava peel, laundry waste, phosphate
MATHEMATIC MODEL OF HIDROLYSIS PROCESS FROM BANANA TREES CELLULOSE TO GLUCOSE BY USING LIQUID ACID CATALYST Silvester Tursiloadi, Galih K. Sanjaya dan Nastiti Siswi Indrasti2
Jurnal Teknologi Industri Pertanian Vol. 19 No. 3 (2009): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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Abstract

 Banana trees are rich of cellulose and a potential source for producing glucose. The aim of the research was to develop a mathematic model of banana tree fiber hydrolysis by using sulfite acid as catalyst. The concentratios of the acid catalyst were 0.25 M, 0.5 M, and 1M at temperature of 85 oC and 100 oC. The concentration of acid catalyst and the reaction temperature were varied to determine the activation energy that might be affected by the addition of acid catalyst. The sugar concentration was measured as an hydrolysis parameter. The concentration of reducing sugar produced during the hydrolysis process was also measured to develop the mathematical model of hydrolysis process. The values of determination coefficient (r2) from mathematical model of kinetic reaction were more than 0.8. The kinetic model was valid for concentration range from 0.25 M to 1.5 M. Keywords: mathematical model, determination coefficient, hydrolysis, banana trees, liquid acid catalyst
PENYERAPAN LOGAM Pb DAN Cd OLEH ECENG GONDOK : PENGARUH KONSENTRASI LOGAM DAN LAMA WAKTU KONTAK Nastiti Siswi Indrasti, , Suprihatin, Burhanudin dan Aida Novita
Jurnal Teknologi Industri Pertanian Vol. 16 No. 1 (2006): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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ABSTRACTThere have been many research on heavy metal removal using aquatic plant. This research was conducted using Eceng Gondok (Eichhornia crassipes) to absorb and accumulate Pb and Cd in a single mixed of them (Pb+Cd).  Initial heavy metals concentrations used in this research were 0.5, 1.0, 3.0, 5.0 and 10.0 mg/l and contact period of 15 days.  The result indicated that the rate of absorption and accumulation of mixed heavy metals (Pb+Cd) was higher compared to single heavy metal.  The highest removal efficiencies for Pb (single), mixed (Pb+Cd) and Cd (single) were 88.10%, 86.06% and 85.83% respectively.  Heavy metals were accumulated more in the root of Eichhornia crassipes than in the tissues (stem and leave).  Heavy metals accumulation in the root for mixed (Pb +Cd), Pb (single) and Cd (single) were 21628 mg/kg, 16644 mg/kg, and 14057 mg/kg respectively, while heavy metals accumulation on plant tissues (stem and leaves) for mixed (Pb+Cd), Pb (single) and Cd (single) were 1305 mg/kg, 620.5 mg/kg, and 600.5 mg/kg. It is concluded that the higher the initial concentration of heavy metal in the waste water, the more metals can be absorbed by Eichhornia crassipes. The longer contact period, the more metals could be adsorbed too. Key words: Pb and Cd metals, consentration and contact period
ADSORPSI LOGAM BERAT SENG (Zn) DENGAN MENGGUNAKAN AKAR RAMBUT Solanum nigrum L GALUR A4 KERING TERIMOBILISASI DALAM Na-alginat Nastiti Siswi Indrasti, Muhammad Ahkam Subroto dan Gun Gun Gunawan
Jurnal Teknologi Industri Pertanian Vol. 15 No. 1 (2005): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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ABSTRACTRoot tissue of Solanum nigrum L A4 strain was found to adsorb heavy metal especially Zinc (Zn).  Compared with activated carbon used as adsorbent on industrial waste water treatment process, the adsorption by root tissue of Solanum nigrum L was higher. The adsorption of Solanum nigrum L was represented by Langmuir and Freundlich isotherms equation. Ground powder of Solanum nigrum L was immobilized by natrium alginate for a practical use.  Zinc  concentration adsorbed by immobilized Solanum nigrum L were higher than ground powder form.  The adsorption capacity shows the capacity of the adsorbent used.  It was calculated through dividing adsorbat (mg) with the weight of the adsorbent (gr).  Even the concentration of zinc  adsorbed by immobilized beads was higher, the adsorption capacity of ground powder form of Solanum nigrum L was higher then immobilized beads.  It might be caused by the natrium alginate which also adsorbed zinc and formed higher weight of adsorbent, and implies that polymer used for immobilization creates a binding coated on the Solanum nigrum L  ground powder surface.Key words : adsorption, plant tissue, zinc, immobilization
APLIKASI LINEAR PROGRAMMING DALAM FORMULASI PUPUK ORGANIK BERBASIS KOMPOS UNTUK BERBAGAI TANAMAN Nastiti Siswi Indrasti, Purwoko dan Suherman
Jurnal Teknologi Industri Pertanian Vol. 15 No. 2 (2005): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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ABSTRACTTo support Indonesian organic agricultural system that will be started in 2010, fertilizing will be done with organic fertilizer. The function of fertilizer is to fulfill the plant nutrition. The needs of nutrition is different from plant to plant so it is necessary to formulate the organic fertilizer to balance the nutrition. The most needed nutrition for plant consists of N, P and K. The formulated organic fertilizer were applied for  mango, chili, rose, paddy, oil palm, and ginger.Materials which were used to formulate organic fertilizer were compost (X1), cow manure (X2), rock phosphate (X3), and chaff ash (X4). Method which was used for formulated organic fertilizer was linear programming (LP). The objective function was to minimize the cost that was based on each material cost. The constrain function in the left side was  content of N, P and K dry basis for each material while in the right side was the needs of plant’s N, P, and K nutrition per hectare.The result of problem solving with LINDO program was : 4 898.00 kg/ha X1, 2 367.60 kg/ha X2 and                        1 808.89 kg/ha X3 for mango’s formula; 5 296.08 kg/ha X1, 1 465.70 kg/ha X2 and 4 325.93 kg/ha X3 for chili’s formula; 7 450.14 kg/ha X1, 6 462.52 kg/ha X3 and  1 045.98 kg/ha X4 for rose’s formula; 5 088.26 kg/ha X1, 744.28 kg/ha X3 and 1 725.96 kg/ha X4 for paddy’s formula; 2 943.88 kg/ha X1, 4 646.32 kg/ha X3 and 6 520.57 kg/ha X4 for oil palm’s formula; 23 631.42 kg/ha X1, 19 311.75 kg/ha X3 and 2 479.06 kg/ha X4 for ginger’s formula.The NPK content of the formulated organic fertilizer can be determined with mathematic calculation, but to determine the real NPK content must be tested in laboratory. The result of NPK content by calculating and the result from laboratory test have relatively small differences, that is about 0% to 8.33%.Key word : organic fertilizer, compost, plant nutrition, linear programming
PENGHILANGAN GAS SO2 (SULFUR DIOKSIDA) DENGAN TEKNIK BIOFILTER MENGGUNAKAN Thiobacillus sp. PADA MEDIA SERBUK GERGAJI, KOMPOS DAN TANAH Nastitit Siswi Indrasti, Mohamad Yani dan Sugyanto P. Manik
Jurnal Teknologi Industri Pertanian Vol. 14 No. 3 (2005): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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ABSTRACTSulphur dioxide is one of the hazardous substances. Most of SO2 is emitted from oil burning. SO2 was effectively removed by biofilter technique using Thiobacillus sp. in compost, saw dust, and top soil media. On the biofilter without Thiobacillus sp.with the inlet concentration of  SO2 2396,10 µg/m3; the saturated time is shorter than that on the biofilter with Thiobacillus sp. addition. Saturated time without Thiobacillus sp. in the compost biofilter was a 12 hour, in top soil biofilter was 18 hours, and in the saw dust biofilter was 0,5 hoursThe removal capacity of SO2 with Thiobacillus sp. in the compost biofilter was 4,12 mg-S/ /kg compost-dayl, while in the biofilter top soil was 3,12 mg-S/kg top soil-day. Thiobacillus sp. addition in the saw dust biofilter did not affect the ability of SO2 degradation. There were 3 levels of SO2 inlet concentration, ie: 2396,10 µg/m3, 4632,29 µg/m3, and 9331,68 µg/m3. Compost biofilter effectively worked in 19 days while top soil biofilter  worked in 22 days. Saw dust was saturated at the first day of the process. Keywords : Biofilter, Thiobacillus sp., SO2 degradation, compost, top soil, saw dust
PENGEMBANGAN MEDIA TUMBUH ANGGREK DENGAN MENGGUNAKAN KOMPOS Nastiti Siswi Indrasti, dan Rio Reyno Elia
Jurnal Teknologi Industri Pertanian Vol. 14 No. 2 (2004): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

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ABSTRACTCompost can be utilized as organic fertilizer and orchid’s growth media as well. In general, the objective of this research was to develop orchid's growth media from compost. The specific objectives of this research was : 1) to conduct the composting process using windrow techniques from buffalo manure, rice straw, coffee hull and leaf. 2) to investigate the effect of the compost and clay mixture, heating time and temperature to the physical and nutrient quality of the orchid’ growth media.The orchid's growth media consist of compost, clay and water  as raw material. The dimension of the orchid’s media was 10 x 10 x 4 Cm3. The orchid's growth media was made through manual's forming process and heating in oven. The used experimental design was completely randomized block factor design with two times replication. The ratio of compost to clay was 2:3; 2:2 and 3:2; the heating time factor was 2, 3 and 4 hours, and the heating temperature factor was 70, 80 and 90 oC. The best combination treatment was achieved by a mixture of compost and clay with the ratio of 2:2, heating time of 2 hours at 70 oC . The best combination treatment showed the value of pressure of 16,95 Kgf/Cm2; weight of 504,45 g; N-Total 0,68 %; P2O5 0,26 % and K2O 1,74 %.Key words :  Compost, Windrow Techniques, Orchid’s Growth  Media, Clay