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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Pendidikan IPA Indonesia LAPORAN PENELITIAN DAN PENGABDIAN MASYARAKAT Majalah Ilmiah MOMENTUM Qistie: Jurnal Ilmu Hukum Jurnal Ilmu Farmasi dan Farmasi Klinik (Journal of Pharmaceutical Science and Clinical Pharmacy) Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Jurnal Inovasi Teknik Kimia International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Jurnal Polimesin
Rita Dwi Ratnani
Teknik Kimia Universitas Wahid Hasyim
Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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ADSORBSI LIMBAH REBUSAN REBUNG DARI INDUSTRI PENGOLAHAN LUMPIA DENGAN KARBON AKTIF KOMBINASI LIMBAH BOILER DENGAN ECENG GONDOK Via Utami Putri; Rita Dwi Ratnani; Laeli Kurniasari
Jurnal Inovasi Teknik Kimia Vol 5, No 2 (2020)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v5i2.3817

Abstract

PENGARUH WAKTU DAN SUHU PEMBUATAN KARBON AKTIF DARI TEMPURUNG KELAPA SEBAGAI UPAYA PEMANFAATAN LIMBAH DENGAN SUHU TINGGI SECARA PIROLISIS Khornia Dwi Lestari L.F; Rita Dwi Ratnani; Suwardiyono Suwardiyono; Nur Kholis
Jurnal Inovasi Teknik Kimia Vol 2, No 1 (2017)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v2i1.1739

Abstract

Tempurung kelapa merupakan limbah yang cukup berlimpah di Indonesia dan dianggap sebagai masalah. Solusi yang dapat diterapkan pada kasus limbah tempurung kelapa ini adalah menjadikannya sebagai karbon aktif. Karbon aktif banyak digunakan sebagai adsorben di dalam industri. Penelitian ini bertujuan untuk membuat karbon aktif dari pemanfaatan tempurung kelapa secara pirolisis dengan tanpa menambahkan bahan pengaktif serta untuk mengetahui pengaruh variabel waktu dan suhu pirolisis terhadap mutu karbon aktif tersebut sesuai dengan SII No. 0258-79. Metode yang digunakan adalah dengan suhu tinggi secara pirolisis. Tahap penelitian ini meliputi preparasi tempurung, pirolisis, uji kualitas karbon aktif. Proses pirolisis dilakukan dengan variasi waktu 1, 2, 3, 4, 5, 6, 7 jam, variasi suhu 225, 250, 275, 300, 325, 350 oC. Hasil penelitian menunjukkan hasil uji karbon terbaik pada waktu 5 jam dan suhu 325oC. Hasil uji meliputi  daya serap iodine terbaik 477,83 mg/g, kadar air 2,04%, kadar zat menguap 54,08%, kadar abu 0%, kadar karbon terikat 45,92%. Keseluruhan hasil uji menunjukkan bahwa kadar daya serap larutan iodin lebih besar dari 20% (200mg/g), kadar air kurang dari 10%, dan kadar abu kurang dari 2,5% telah memenuhi SII No.0258-79. Kata kunci : karbon aktif, pirolisis, tempurung kelapa
PENGARUH WAKTU DAN SUHU PEMBUATAN KARBON AKTIF DARI ECENG GONDOK ( EICHHORNIA CRASSIPES ) SEBAGAI UPAYA PEMANFAATAN LIMBAH DENGAN SUHU TINGGI SECARA PIROLISIS Arief Henry Kurniawan; Rita Dwi Ratnani; Suwardiyono Suwardiyono; Imam Syafa’at
Jurnal Inovasi Teknik Kimia Vol 5, No 2 (2020)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v5i2.3814

Abstract

AKTIVITAS ANTIPLASMODIUM EKSTRAK HIDROTROPI DAUN SAMBILOTO (Andrographis paniculata Ness.) SECARA In Vitro PADA Plasmodium falciparum STRAIN G-2300 RESISTEN KLOROQUIN Yance Anas; Rita Dwi Ratnani; Laeli Kurniasari; Indah Hartati
Jurnal Ilmu Farmasi dan Farmasi Klinik Vol 17, No 01 (2020): Jurnal Ilmu Farmasi & farmasi Klinik Vol 17 No. 01, Juni 2020
Publisher : Universitas Wahid Hasyim Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.354 KB) | DOI: 10.31942/jiffk.v17i01.3479

Abstract

ABSTRACT The bitter leaf extract (Andrographis paniculata Ness.) has long been known as an anti-malarial. Our previous research has developed a bitter leaf hydrotrophy extract (BLHE) using a sodium acetate 2 mol/L as a hydrotop compound solution. The extraction process lasts for 2 hours, faster than conventional extraction. The result is two types of BLHE with different stirring temperatures, at 30°C (BLHE1) and 35°C (BLHE2). This study meant to determine and compare the in vitro antiplasmodial activity BLHE1 and BLHE2. The anti-plasmodial activity of BLHE1 and BLHE2 (0.1- 50.0) g/mL performed on a G-2300 strain of P. falciparum (chloroquine-resistant) after incubated for 48 hours (triplicate). The percentage of parasitemia determined through an examination of blood smears stained with Giemsa. The percentage of growth inhibition of P. falciparum evaluates by comparing percentage of growth with the control group and IC50 determine by probit analysis. The results showed that BLHE1 and BLHE2 respectively were able to inhibit the growth of P. falciparum of 14.62% - 43.25% (IC50: 59.689 μg/mL) and 24.06% - 49.48% (IC50: 44.541 μg/mL). Based on these data, BLHE should produce with sodium acetate 2 mol/L, with stirring at 35°C, because this condition will obtain BLHE that active as anti-plasmodial. Keywords: Anti-plasmodial, bitter leaf hydrotrophy extract, P. falciparum strain G-2300, in vitro
STANDARDISASI SPESIFIK DAN NON SPESIFIK EKSTRAKSI HIDROTROPI ANDROGRAPHOLID DARI SAMBILOTO (Andrographis paniculata) Rita Dwi Ratnani; Indah Hartati; Yance Anas; Devi Endah P.; Dita Desti D_Khilyati
Jurnal Ilmu Farmasi dan Farmasi Klinik Prosiding Seminar Nasional "Peluang Herbal Sebagai Alternative Medicine"
Publisher : Universitas Wahid Hasyim Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.478 KB) | DOI: 10.31942/jiffk.v0i0.1358

Abstract

ABSTRACT Several active compounds has been found in Andrographis paniculata, including andrographolide (deoxy andrographolide, andrographolide, neo andrographolide and 14-deoxy-11,12-didehydroandrographolide) and kalmeghin. The active compounds properties and its levels in extract medicinal plants cannot be guaranteed to always be in a constant amount. This may be due to variations in the quality of medicinal plants, such as seeds, grow location, climate, conditions (age and harvest method), as well as post-harvest process and extraction method. Therefore, standardization of the extract should be performed to ensure the quality of the extract before it is produced on an industrial scale. The purpose of this study is to standardize the sambiloto hydrotropic extract. Specific parameters such as the organoleptic properties of the extract and identification of andrographolide compound as marker compounds. In contrast, the non-specific parameter includes drying shrinkage, microbiological contamination levels, heavy metal contamination levels, ash levels, the solubility of extracts in water and ethanol. The results showed that the organoleptic properties hydrotropic sambiloto extract are in powder form dense, dry, dark green, characteristic odor and bitter taste. Andrographolide compound as a marker compound in the sambiloto extract was identified by TLC method. The non-specific parameters of sambiloto hydrotropic extract were shrinkage drying of 13.5%, microbiological contamination of (3.1x107) CFU/g, heavy metal contamination (Cd levels of 0.104 ppm, and Pb levels of 2.248 ppm), ash levels of 37.5%, and the solubility extracts in water and ethanol are 40.8 % dan 42.0% respectively. Key words: Andrographis paniculata, extract standardization, specific and non-specific
Characterization of Liquid Smoke from Dried Water Hyacinth Using GCMS (Gas Chromatography-Mass Spectrophotometry) to Utilize Weeds as Food Preservative Ratnani, R. D.; Hadiyanto, H.; Widiyanto, W.; Adhi, M. A.
Jurnal Pendidikan IPA Indonesia Vol 11, No 2 (2022): June 2022
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v11i2.34501

Abstract

Water hyacinth is a weed in Rawa Pening because of its rapid growth. A handling effort is a very crucial thing and must be done immediately. This study aims to characterize organic compounds in liquid smoke from dried water hyacinth. ­­­­Characterization of organic compounds from dried water hyacinth was carried out on water hyacinth liquid smoke which was pyrolyzed at 200°C and 600°C. Pyrolysis times were run at 2 hours and 6 hours. Liquid smoke from dried water hyacinth was distilled before testing its chemical composition using GCMS brand Shimadzu type QP 2010S. The results of liquid smoke characterization are used to decide that liquid smoke can be utilized as a food preservative. The test results report that the liquid smoke produced had an acid percentage ranging from 29.63% to 37.23%, phenol from 1.04 to 6.11%, and the remaining carbonyl compounds from 55.99% to 68.90%. The highest component value was obtained at 600°C pyrolysis and 6 hours. The conclusion is that liquid smoke from dried water hyacinth can be used as a food preservative because it contains acid, phenol, and carbonyl and is free of Benzo (a) pyrene, which can cause cancer. So that the requirement for liquid smoke as a preservative can be achieved, whereas acid is a food preservative. This study generates the acquisition of natural food preservatives to utilize weeds. The research helps us utilize weeds to resist the Rawa Pening environment and manufacture food preservatives.
Effects of the Addition of Coconut Shell Oil on Diesel Engine Performance: An Experimental Study Agung Nugroho; Fajrin Lumela; Rita Dwi Ratnani
Jurnal POLIMESIN Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.2847

Abstract

Biodiesel is one of the efforts to reduce dependence on fuel oil developed as an environmentally friendly alternative fuel in Indonesia. The addition of coconut shell oil will change the biodiesel properties and engine performance. This study aims to determine the physical properties and performance of fuel in diesel engines due to the addition of coconut shell oil. Several methods were applied to test the physical properties of biodiesel, namely: viscosity, density, cetane number, and calorific value. Meanwhile, the parameters for engine performance testing include torque, power, and specific fuel consumption. Biodiesels used were CS-20 and CS-40 for physical properties tests, and CS-10, CS-15, and CS-20 for engine performance tests. The results found that CS-20 had density of 842 kg/m3, kinematic viscosity of 3.958 mm2/s, cetane number of 62.4, flash point of 305.06°C, and heating value of 43,681.72 kJ/kg. For CS-40, the density was 867 kg/m3, the kinematic viscosity was 1.773 mm2, and the calorific value was 43,390.74 kJ/kg. Based on the results of the diesel engine performance test, the highest torque value was 31.487 Nm on Dexlite at 967 rpm rotation with a mass of 9.51 kg, while the highest power was 4.021 kW on Dexlite at 1752 rpm rotation and torque of 21.919 Nm. The best specific fuel consumption on Dexlite at 3563 rpm rotation used 0.527 liters/kWh. In conclusion, the addition of coconut shell oil to Dexlite reduces energy as the calorific value decreases. Furthermore, it is proven that due to the addition of coconut shell oil, the engine performance is decreasing.
PENINGKATAN KUALITAS LIMBAH CAIR INDUSTRI SIRUP MENGGUNAKAN SELULOSA ECENG GONDOK (Eichhornia Crassipes) Aditya Alfan Marzuki; Rita Dwi Ratnani; Indah Hartati
Prosiding Sains Nasional dan Teknologi Vol 13, No 1 (2023): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 2023
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/psnst.v13i1.9757

Abstract

Proses koagulasi menjadi tahapan penting dalam pengolahan air limbah industri untuk menurunkan kadar COD dan TSS. Selama ini proses pengolahan air limbah industri menggunakan koagulan anorganik yang memiliki kekurangan dapat mengganggu kesehatan manusia. Penelitian ini menggunakan bahan eceng gondok sebagai koagulan alami untuk mengurangi ketergantungan terhadap koagulan anorganik serta meningkatkan nilai guna gulma eceng gondok. Eceng gondok di ekstraksi menggunakan pelarut NaOH dengan variasi waktu delignifikasi (1 ; 2 ; 3 ; 4 ; 5) jam, konsentrasi pelarut (0 ; 1 ; 2 ; 3 ; 4 ; 5 ; 6)% , massa koagulan (1 ; 1,5 ; 2 ; 2,5 ; 3) gram. Dengan analisa COD metode refluks terbuka, analisa TSS metode gravimetri. Koagulan alami eceng gondok dapat menurunkan kadar COD 28,06% serta kadar TSS sebesar 74,46%. Kemampuan ini didapatkan karena tedapat selulosa yang termasuk dalam polisakarida yang berfungsi mengikat residu dalam air keruh.
PENGEMBANGAN PRODUKSI BIOPLASTIK UNTUK KERAJIANAN ASESORIS DARI GLISEROL SEBAGAI PEMANFAATAN LIMBAH INDUSTRI BIODISEL Ratnani, Rita Dwi; Budihardjo, Arief; Wikanta, Deddy Kurniawan
Laporan Penelitian dan Pengabdian Masyarakat LAPORAN PENELITIAN
Publisher : Laporan Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Plastics is one of chemical invention that make our life easier. The broaden usage of plastics is caused by plastic‘s preeminence. However, the preeminence of platics has made it as the biggest source of pollutant. Plastics create so much pollution and landfill crisis that various attempts have been made to solve these problems. One of these attempts is to create a biodegradable plastic from glycerol in Sequencing Batch Bioreactor. This research objectives are to develop the sequenching batch bioreactor for PHA production from glycerol and to optimize the process condition toward the PHA productivity. Research on the production of polyhydroxyalkanoates through the glycerol fermentation in a sequencing batch bioreactor is investigated both experimentally and modelling. The research sequences are conducted in several steps: design and fabrication of sequencing batch bioreactor, polyhydroxyalkanoates productivity test and optimization of the process parameters. The productivity test showed that the addition of methanol in the pretreatment process of PHA recovery has enhance the yield of the PHA extracted from the biomass. The highest PHA recovery was achieved from pretreament duration of 2 hours submerging in methanol solution. The optimization process showed that the most influencing variables was the nitrogen concentration and the highest PHA recovery was achieved from process conducted with nitrogen concentration of 4 mg/L, Phosporous concentration of 2 mg/L, oxygen concentration of 5 mg/L and the aerobic-anaerobic ratio of 1:4
PEMANFAATAN ECENG GONDOK (EICHORNIA CRASSIPES) UNTUK MENURUNKAN KANDUNGAN COD(CHEMICAL OXYGEN DEMOND), pH, BAU, DAN WARNA PADA LIMBAH CAIR TAHU Ratnani, Rita Dwi; Hartati, Indah; Kurniasari, Laeli
Laporan Penelitian dan Pengabdian Masyarakat LAPORAN PENELITIAN
Publisher : Laporan Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Di Indonesia banyak terdapat industri tahu mulai dari industri kecil sampai ke industri besar. Dari kegiatan industri tersebut, timbul limbah yang mengandung zat organik sangat tinggi. Kandungan zat organik dalam limbah cair tahu berpotensi mencemari lingkungan, sehingga perlu adanya pengolahan sebelum dibuang ke lingkungan. Oleh karena itu perlu adanya upaya untuk melakukan penanganan terhadap limbah yang timbul tersebut. Salah satu upaya awal untuk menangani hal tersebut adalah melakukan penelitian. Penelitian ini bertujuan untuk mengetahui kemampuan eceng gondok untuk menurunkan kandungan COD, meningkatkan/ menormalkan pH, menjernihkan limbah, dan mengurangi bau yang timbul.Penelitian ini dilakukan di pabrik pengolahan tahu Desa Cangkiran Kota Semarang. Penelitian ini memanfaatkan eceng gondok untuk menyerap limbah organik yang menyebabkan limbah cair menjadi COD tinggi, pH rendah, warna keruh dan berbau sangat menyengat. Proses penanaman dilakukan dalam bak beton dengan ukuran panjang 150 cm, lebar 145 cm, dan tinggi 120 cm. Dalam penelitian ini diamati penurunan kandungan COD, peningkatan pH, perubahan warna, dan perubahan bau yang timbul setiap hari selama 8 hari dengan menggunakan media eceng gondok.Hasil percobaan Terjadi penurunan COD sampai ambang batas yang diperbolehkan yaitu terjadi penurunan dari 768 ppm menjadi 208 ppm dan pada ulangan yang dilakukan dari 672 ppm menjadi 160 ppm dimana sudah di bawah baku mutu bedasakan Perda Jateng No. 10 tahu 2004. Terjadi peningkatan nilai pH. Diawal proses, pH dari limbah cair tahu adalah 4.2 dan naik sampai 7.4 demikian juga setelah diulang mulai 4.6 naik menjadi 7.3. Perubahan warna pada penelitian ini kurang memuaskan karena tidak terjadi perubahan warna tetapi hanya berubah tingkat kejernihan di awal, warna limbah cair tahu adalah kuning keruh bahkan ada busanya dan setelah diolah berwarna kuning jenih. Dalam pengamatan perubahan bau, pada hari ke 4 bau sudah berkurang. Akan beda kalau tidak diolah semakin lama maka akan semakin bauKata kunci : penyerapan, limbah cair tahu, eceng gondok
Co-Authors Achmat Riyanto Adhi, M. A. Aditya Alfan Marzuki Agung Nugroho Ahadta Anandya Rahma Andi Prasetiyo Andy Yusuf Kurniawan Arief Budihardjo, Arief Arief Henry Kurniawan Asvif Ma’rufah Ayuningtyas, Rosida Dwi Bahrul Fawaid Deddy Kurniawan Wikanta Deddy Kurniawan Wikanta Devi Endah P. Dita Desti D_Khilyati Elok Khofiyanida Endah Winarni Fajrin Lumela Farikha Maharani H Hadiyanto Hargono Hargono Harianingsih, Harianingsih Helmy Purwanto I Hartati I. Hartati I. Hartati I. Hartati I. Hartati I. Riwayati Imam Sujarwo Imam Syafaat Indah Hartati Khornia Dwi Lestari L.F Laeli Kurniasari Laeli Kurniasari Lailatul Fitriyah Lilik Wuri Hadayani Mahmutarom HR Mochamad Arif Budihardjo Mohammad Endi Yulianto Muhammad Ilhammudin Nanik Andar Miningsih Ni’matul Fikriyyah Nugroho, Agung Nur Kholis R. Anggraeni Saiful Huda Saiful Huda Salsabila, Annida Nur Sarmi Sarmi Siti Iqlima Layudha Siti Iqlima Layudha Sufrotun Khasanah Suwardiyono Suwardiyono Suwarno Suwarno Syafi’ul Rofik Tabah Priangkoso Titin Nurlaili Via Utami Putri Widiyanto Widiyanto Winanto, Mohfan Juni Yance Anas Zakka Athoo’ Illah