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THE EFFECT OF TIME FUMIGATION ADHESIVE PLYWOOD Silviyati, Idha
KINETIKA Vol 3, No 3 (2012): KINETIKA 01112012
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4.984 KB)

Plywood panels are made with a single sheet of veneer glue or more on both sides of an intact core or wood veneer. Formaldehyde emissions from wood panel products such as plywood and particle board are glued with urea formaldehyde (UF) can be detrimental to health, especially if used in a room with limited ventilation. To reduce emissions of formaldehyde, the product can be fumigated with a chemical. Decrease in the concentration of Urea Formaldehyde emissions from plywood can be done by fumigation Ammonium Hydroxide. The longer the time fumigation is given, the greater the decline in value of the concentration of Urea Formaldehyde emissions. Value of Urea Formaldehyde Emissions on plywood that meets the standards of fumigation treatment is given 1 hour and 1.5 hours at different temperatures and pH. While fumigation at 0.5 hours Urea Formadehida gas emission values do not meet standards, this is due to the fumigation period is not too long. The less time the fumigation, the greater the value Formaldehidanya Urea gas emissions, due to free formaldehyde absorbed by the Ammonium Hydroxide is still small. Thus forming Heksametilentetraamine bit too, free formaldehyde concentration emitted plywood still high. the higher the temperature, the smaller the value of emissions. This is due to the high formaldehyde volatile as a result, so as to reduce the content of free formaldehyde in Urea Formaldehyde Glue. And the greater the pH of the process tends to the smaller emissions. This is due, at near neutral pH, free Formaldehyde more perfect reaction speed with Urea.

PENGARUH PENAMBAHAN HIGH DENSITY POLY ETHYLENE (HDPE) DAN OLI BEKAS SEBAGAI BINDER PADA BATA RINGAN DENGAN VARIASI FILLER Silviyati, Idha
KINETIKA Vol. 10 No. 3 (2019): KINETIKA 01112019
Publisher : Politeknik Negeri Sriwijaya

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Plastic is one of the polymer materials that is widely used in daily lives, one of them is High Density Poly Ethylene (HDPE) polymer which is the one type of the large contributors of plastic waste, and also believed to cause environmental and health problems. One of advanced material is lightweight brick which has become an innovation in building materials. Lightweight Hebel brick (celcon) is an infrastructure product that is widely used in this day. This study is entitled High Density Poly Ethylene (HDPE) Polymers as Binders in Lightweight Hebel Bricks (Celcon). Referring to the research master plan of the Sriwijaya State Polytechnic namely appropriate technological and industrial innovation and technology development of mining products. In this study utilizing High Density Poly Ethylene (HDPE) polymers as Binder and Portland Cement type I and silica Sand as Filler, in the process of making Lightweight Hebel Bricks (Celcon). The comparison of the Filler and Binder are 30:70, 40:60, 50:50, 60:40, 70:30 in %wt. Sample testing is done by testing the compressive strength, analyzing water absorption, density and SEM & EDX. The results showed that the compressive strength produced is included in quality I and quality III according to SNI 03-0349-1989 which in the variation of filler sample A has a compressive strength of 224.67 kg / cm2 and variation of filler sample B is 40, 45 kg / cm2 . The value of water absorption produced is also still below of the maximum limit, which is 25% which in the variation of sample A filler is 0.97% and the variation of filler sample B is 2.42%. The density values obtained are included in the medium density for filler variation of sample A, which is 900 kg / m3 and high density for variation of filler sample B, which is 1800 kg / m3 . By SEM-EDX analysis results showed that sample A has more porosity when compared to variations of sample B filler. In terms of economic analysis, the advantage of using plastic as material in making hebel bricks is the cost of making it economically due to the presence of plastic that is easily found.

SIMULASI PRODUKSI GAS SINTESA MELALUI PROSES BIOGAS STEAM REFORMING DENGAN KATALIS Ni/MgO-Al2O3 DAN Ni/La2O3-Al2O3 Firmansyah, Muhammad Rafli; Silviyati, Idha
KINETIKA Vol. 11 No. 2 (2020): KINETIKA 01072020
Publisher : Politeknik Negeri Sriwijaya

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A renewable energy system to produce electricity from biogas feed by integrating the reforming process with an SOFC (Solid Oxide Fuel Cell) was evaluated through experimental and modeling study. The system performance was evaluated using the Aspen Plus process simulation tool and through biogas steam reforming experiments over 10 wt% Ni/MgO-Al2O3 and Ni/La2O3-Al2O3. Biogas steam reforming simulations were conducted for biogas feeds with CH4/CO2 ratios of 40/60, 50/50 and 60/40 at S/C ratios of 1.00â€“2.00 over a temperature range of 873â€“1123 K. The experimental data conclude that positive CO2 conversion was attained at temperatures higher than 1073 K. The results show that the proposed system can provide a viable approach to maximizing renewable methane resources for localized power generation

PERBANDINGAN PENGARUH EM4 DENGAN RAGI (SACCAROMYCES CEREVISIAE) TERHADAP KADAR BIOETANOL DARI MOLASES Gunawan, Reno; Anwar, Chairul; Effendy A, Sahrul; Taufik, Muhammad; Silviyati, Idha
Jurnal Distilasi Vol 6, No 2 (2021): Jurnal Distilasi
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jd.v6i2.4127

Kebutuhan energi dunia saat ini dapat disubstitusi dengan etanol sebagai bahan bakar alternatif. Bahan baku produksi etanol dapat menggunakan molases yang merupakan sisa pembuatan gula tebu namun masih mengandung glukosa dan nutrisi tinggi. Penelitian ini memanfaatkan limbah pabrik gula/molasess sebagai bahan dasar pembuatan etanol. Tetes tebu berupa cairan kental dan diperoleh dari tahap pemisahan kristal gula. Molases masih mengandung gula dengan kadar 50-60%, asam amino dan mineral. Tingginya kandungan gula dalam molases sangat potensial dimanfaatkan sebagai bahan baku bioetanol. Dalam penelitian konversi molases menjadi bioetanol pada bioreaktor menggunakan variabel konsentrasi berat Saccaromyces cerevisiae sebagai variabel bebas. Variabel tetap yang digunakan adalah pH 5, temperatur ruangan, kecepatan pengadukan sebesar 50 rpm, komposisi nutrisi ragi, dan bahan utama (molases) yang digunakan. Dari hasil penelitian didapatkan nilai densitas yang paling mendekati fuel grade densitas bioetanol yaitu sebesar 0,808 gr/mL pada saat menggunakan EM4 sebanyak 17 mL. Namun jika dilihat dari kadar bioetanol yang dihasilkan, hasil yang paling optimum justru terjadi pada saat penambahan ragi sebanyak 13 gram dengan kadar bioetanol sebesar 80 %. Sedangkan untuk nilai kalor yang dihasilkan, hasil yang paling optimum tejadi pada saat menggunakan EM4 sebanyak 17 mL dengan nilai kalor sebesar 8584,364 cal/gr.

Sintesis Silika Gel dari Abu Cangkang dan Serabut Kelapa Sawit Terimobilisasi Difenilkarbazon dengan Metode Sol-Gel Sonia Wimarsela; Robert Junaidi; Idha Silviyati
Jurnal Penelitian Inovatif Vol 1 No 2 (2021): JUPIN Desember 2021
Publisher : CV Firmos

Abu cangkang dan serabut kelapa sawit memiliki kadar silika tinggi yang dapat digunakan sebagai bahan baku sintesis silika gel. Silika gel mempunyai situs aktif berupa gugus silanol (Si-OH) dan siloksan (Si-O-Si) di permukaan. Dengan adanya gugus –OH memberikan peluang untuk memodifikasi gugus tersebut menjadi gugus lain yang lebih aktif. Tujuan dari penelitian ini yaitu untuk menghasilkan silika gel dengan nilai daya serap uap air yang lebih tinggi dan berfungsi lebih optimum sebagai adsorben. Penelitian dilakukan dengan tiga tahapan yaitu persiapan bahan baku, sintesis silika gel dan modifikasi, dan analisis silika gel. Sintesis silika gel dilakukan dengan variasi konsentrasi H2SO4 1 - 5 M, waktu pematangan gel 12 dan 18 jam, dan massa difenilkarbazon 0,12 dan 0,18 g. Dari hasil penelitian didapatkan kondisi optimal sintesis silika gel terimobilisasi difenilkarbazon dicapai pada konsentrasi H2SO4 1 M, waktu pematangan gel 18 jam, dan massa difenilkarbazon 0,12 g. Pada kondisi ini diperoleh keasaman permukaan 6,15 mmol/g, luas permukaan 16,6150 m2/g, kadar air 8,4%, dan daya serap 10,960 mg/g.

PENGARUH PENAMBAHAN EKSTRAK ASAM JAWA (TAMARINDUS INDICA L) TERHADAP KUALITAS & KUANTITAS PIEZOELECTRIC CRYSTAL SEBAGAI TRANSDUSER ENERGI LISTRIK Muhammad Iskandar Al Hakim; Idha Silviyati; Endang Supraptiah
Jurnal Redoks Vol. 8 No. 1 (2023): REDOKS JANUARI-JUNI
Publisher : Universitass PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/redoks.v8i1.9090

Energi listrik merupakan salah satu energi primer yang tidak dapat dilepaskan penggunaannya dalam kehidupan sehari-hari. Namun, sumber energi pembangkit listrik di Indonesia sebagian besar bergantung pada sumber daya alam yang tidak dapat diperbarui sehingga diperlukan suatu inovasi mengenai sumber energi pembangkit listrik alternatif. Salah satu contoh dari sumber energi listrik adalah kristal. Piezoelektrik adalah suatu kemampuan yang dimiliki sebagian kristal maupun bahan-bahan tertentu lainnya yang dapat menghasilkan tegangan listrik jika mendapatkan perlakuan tekanan, regangan dan vibrasi. Bahan utama pembuat kristal piezoelektrik sendiri adalah natrium karbonat dan kalium bitartrat yang salah satunya terkandung pada buah asam jawa (TamarindusÂ Indica L.) sebesar 5,27% kalium bitartart yang digunakan sebagai bahan baku tambahan. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan ekstrak asam jawa terhadap kualitas dan kuantitas Piezoelektric Crystal. Hasil penelitian menunjukkan bahwa produk Piezoelectric Crystal (PC) terbukti dapat dihasilkan melalui reaksi antara reaktan natrium karbonat dan kalium bitartarat untuk perbandingan %w/w dengan rasio (0,8:1) sebanyak (47,5:60 gram) dan variasi penambahan ekstrak asam jawa 5, 10, 15, 20 dan 25 mL berkonsentrasi 1,0189 M kalium bitartarat dalam ekstrak asam jawa mempengaruhi bertambahnya nilai %yield, voltase dan densitas produk dengan kondisi optimum penambahan ekstrak asam jawa yaitu pada 25 mL menghasilkan %yield, densitas dan voltase produk tertinggi sebesar 99,91%, 1,6608 gr/cm3 & 163 mV tanpa perlakuan variasi tekanan. Kata kunci : Piezoelectric Crystal, Asam Jawa (Tamarindus Indica L.), Energi Listrik.

Bahan Kimia Pencemar Berbahaya Disekitar Kita Sri Murda Niati; Idha Silviyati; Endang Supraptiah; Gemala Cahaya
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 4 No. 1: November 2024
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v4i1.6139

Tujuan kegiatan pengabdian ini adalah memberikan edukasi kepada ibu ibu pengurus dan anggota Dharma Wanita Persatuan (DWP) Dinas Kesehatan Kab. Siak terhadap apa itu bahan pencemar kimia, jenis jenis pencemar, contoh yang sering ditemukan dilingkungan dan digunakan dalam kehidupan sehari-hari dan bagaimana mengetahui tercemar dan memberikan solusi. Dimateri yang disajikan diangkat tiga topik sebagai sampel yang sangat sering kita temui di lingkungan yakni peptisida yang digunakan di sayur sayuran, ikan dan mi basah yang berformalin dan penggunaan wadah staeroform.

EVALUATION OF THE EFFICIENCY OF WASTE SORTING BY WASTE PICKERS AT THE FINAL PROCESSING SITE TPA SARI MUKTI Niati, Sri Murda; Silviyati, Idha; Supraptiah, Endang; Cahya, Gemala
AL ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 10, No 3 (2024)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v10i3.16792

At the Sari Mukti Landfill, the reduction in the volume of waste entering the final processing is achieved through landfill management, composting, and sorting. The sorting that has been carried out so far is done by scavengers. Based on data and studies conducted at the landfill, it was concluded that the sorting efficiency, on average, between January and February is 0.81%. This efficiency of 0.81% was obtained from sorting in 5% of zones B and C, with a total of 385 scavengers. If we apply the same efficiency to 100% of the area, the number of scavengers required would be 7,700. However, the results of the study do not recommend increasing the number of scavengers. Instead, it is recommended to sort waste at the source. With the sorting mechanisms outlined in the discussion, it is hoped that only a small portion of organic waste will enter the landfill.

Preparation and Characterization of Ceramic Membrane Composition Variations in Pome Waste Treatment Isnandar Yunanto; Silviyati, Idha; Elvani, Lian; Trisnaliani, Lety
Aptisi Transactions On Technopreneurship (ATT) Vol 4 No 3 (2022): November
Publisher : Pandawan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34306/att.v4i3.273

Palm Oil Mill Effluent (POME) is waste generated by the palm oil industry consisting of solid, liquid and gaseous wastes. POME is decomposed in sewage ponds and allowed to decompose naturally. The residual waste generated by this industry is non-toxic but has high polluting power. To overcome this, it is necessary to treat waste by making ceramic membranes. The composition materials needed are clay, zeolite, sodium carbonate and boric acid. The manufacturing method is through the printing and combustion stages at a temperature of 900oC. The results showed that there was an effect of compositional variations on the quality of the final product, namely TSS rejection % 93.355 with a flux value of 0.2474 (L/m2min). From the parameter values obtained, it proves that the ceramic membrane is able to process POME with satisfactory effective results. The quality standard of palm oil liquid waste is in accordance with South Sumatera governor regulation number 8 of 2012 concerning quality standard of liquid waste for industrial, hotel, hospital, domestic and coal mining activities

Bahan Kimia Pencemar Berbahaya Disekitar Kita Sri Murda Niati; Idha Silviyati; Endang Supraptiah; Gemala Cahaya
Joong-Ki : Jurnal Pengabdian Masyarakat Vol. 4 No. 1: November 2024
Publisher : CV. Ulil Albab Corp

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56799/joongki.v4i1.6139

Tujuan kegiatan pengabdian ini adalah memberikan edukasi kepada ibu ibu pengurus dan anggota Dharma Wanita Persatuan (DWP) Dinas Kesehatan Kab. Siak terhadap apa itu bahan pencemar kimia, jenis jenis pencemar, contoh yang sering ditemukan dilingkungan dan digunakan dalam kehidupan sehari-hari dan bagaimana mengetahui tercemar dan memberikan solusi. Dimateri yang disajikan diangkat tiga topik sebagai sampel yang sangat sering kita temui di lingkungan yakni peptisida yang digunakan di sayur sayuran, ikan dan mi basah yang berformalin dan penggunaan wadah staeroform.

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