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Suprihatin
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Precipitated Silica by Precipitation Process of The Sodium Silicate Solution with Carbon Dioxide Gas (Co2) on Fixed Bed Column S. Muljani; R. Dewati; Suprihatin; K. Sumada
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology for People Empowerment.
Publisher : Future Science

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Abstract

Precipitated silica is a silica product produced by a precipitation process, this silica product contains silica, white color, very porous and nanomaterial. This precipitate silica is required to support various types of industrial operations such as vehicle, rubber, cosmetics, electronics, agriculture and other industries. The precipitated silica is produced through two stages of the process: firstly is silica extraction process with the base solution and the secondly is precipitation processes of silica solution with various types of acids such as hydrochloric acid (HCl), sulfuric acid (H2SO4), acetic acid (CH3COOH) and other acids. In this study, the source of silica was obtained from bagasse ash waste of sugar industry, the base solution as a solvent was sodium hydroxide (NaOH) 2 N and the precipitate process was carried out by using carbon dioxide gas (CO2) and the precipitation process was carried out on a fixed bed column. In this study we studied the effect of silica concentration on the inlet feed and the high of the fixed bed on the quality of the precipitated silica product. Based on the results of this study, the quality of precipitated silica produced as follows: 95-98% silica content, weight loss due to temperature heating 105 C: 4 – 5 %, acidity (pH of slurry 5%) : 6.8-7,1, and surface area (BET): 175 m2/gram. The best conditions in this study were 30 cm high of fixed bed, and concentration of silica feed: 0,33% weight and acidity (pH) precipitation 7,1.
Pengaruh Variasi Kadar CaCO3 terhadap Pertumbuhan Fase Superkonduktor BPSCCO–2212 Menggunakan Metode Pencampuran Basah Rianggi Wahyuni Pratiwi; Suprihatin; Simon Sembiring; Roniyus Marjunus
Journal of Energy, Material, and Instrumentation Technology Vol 2 No 1 (2021): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1135.874 KB) | DOI: 10.23960/jemit.v2i1.37

Abstract

This research was conducted to determine the effect of CaCO3 levels on the formation of superconducting phase BPSCCO - 2212 by calculating the level of purity of the phases formed and looking at the microstructure. The variation of CaCO3 was 0.95, 1.00, 1.05 and 1.10 mole using the wet mixing method. The samples were calcined at 800 ° C for 10 hours, and sintered at 820 ° C for 20 hours. Synthesized samples were characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The XRD’s chacterization results show that the level of purity of the formed phases increases with increasing Ca levels with maximum point at BPSCCO-2212/1.10 mole. The highest volume fraction was 79,06% in the BPSCCO-2212/1.10 sample. While the lowest volume fraction was 72.10% in the BPSCCO-2212/0.95 sample. Meanwhile, the highest degree of orientation was 20.59% at BPSCCO-2212/0.95. The lowest degree of orientation was 8.46% at BPSCCO-2212/1.10. SEM’s chacterization results show of all samples have been oriented altought not perfect yet and have relatively little space between slabs (voids).
Pemanfaatan Limbah Tulang dan Duri Ikan Lele Menjadi Camilan Bergizi Stik Tulang Duri Lele Suprihatin; Luluk Edahwati; Sutiyono
Abdi-mesin: Jurnal Pengabdian Masyarakat Teknik Mesin Vol. 1 No. 2 (2021): Abdi-Mesin
Publisher : Program Studi Teknik Mesin Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Budidaya ikan lele saat ini sangat berkembang dengan pesat sehingga ikut serta menggerakkan ekonomi kerakyatan selain untuk mencukupi kebutuhan pangan. Banyaknya kegiatan diversifikasi produk olahan ikan lele seperti pembuatan bakso, abon dan aneka olahan lain akan menghasilkan limbah yang berupa kulit, tulang dan kepala ikan lele yang cukup besar. Limbah tersebut akan menjadi masalah lingkungan apabila tidak ditangani dan dimanfaatkan dengan baik. Tulang ikan lele merupakan limbah yang memiliki kandungan kalsium yang tinggi. Dengan mengolahnya secara tepat merupakan inovasi yang bagus dan dapat diaplikasikan kepada masyarakat. Salah satu bentuk olahannya adalah stik atau camilan yang mempunyai rasa gurih ataupun manis. Manfaat dari kegiatan ini tentunya dapat meningkatkan pengetahuan dan wawasan bagi masyarakat sehingga bisa digunakan berwirausaha dan meningkatkan perekonomian keluarga.
Teknik Pengolahan Sereh (cymbopogon citratus) pada PKK RW IV Perumahan Kosagrha, Kelurahan Medokan Ayu, Kecamatan Rungkut, Surabaya Suprihatin; Luluk Edahwati; Ika Nawang Puspitawati
Abdi-mesin: Jurnal Pengabdian Masyarakat Teknik Mesin Vol. 2 No. 1 (2022): Abdi-Mesin
Publisher : Program Studi Teknik Mesin Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Abstrak-Teknologi pengolahan tanaman obat di Indonesia saat ini sangat pesat kemajuannya. Salah satunya memberdayakan dan memberikan ketrampilan kepada masyarakat dalam menciptakan masyarakat yang inovatif dan kreatif sehingga dapat menunjang perekonomian keluarga. Kegiatan Pengabdian Masyarakat yang dikemas dalam bentuk penyuluhan pembuatan sabun herbal dengan memanfaatkan tanaman sereh yang banyak terdapat diperkarangan warga. Proses pembuatan sabun herbal inipun menggunakan bahan-bahan tambahan alami seperti minyak kelapa. Kegiatan penyuluhan dan pelatihan pembuatan sabun herbal alami ini diharapkan dapat menambah wawasan ataupun pengetahuan mengenai bahan-bahan alami yang bisa dimanfaatkan juga mendorong agar dapat berwirausaha dari hasil produk pembuatan sabun herbal serai.
Analysis of Air Flow Rate in Bulkhead Reactors on Struvite Mineral Luluk Edahwati; S Sutiyono; Suprihatin
BIOMEJ Vol. 2 No. 1 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Struvite is a white crystalline chemical known as magnesium ammonium phosphorus hexahydrate (MgNH4PO4.6H2O). Struvite is soluble in acidic conditions and slightly soluble in neutral and alkaline conditions. In industry, struvite is known as scale in pipes. Urinary stones can be called struvite because struvite crystals can form easily in the urine of animals and humans infected with ammonia organisms produced in the urine. Struvite can potentially be formed by alkaline urine and high magnesium excretion due to a high magnesium plant- based diet. The formation of struvite minerals is carried out in an insulated reactor by mixing a solution of MgCl2, NH4OH, and H3PO4 in a ratio of 1:1:1. The treatment of struvite mineral formation was carried out with a feed inlet rate of 35 ml/minute, the temperature at the reactor was carried out at 30oC while the intake air rate was carried out in the range of 0.25-1.25 liters/min. The pH of the solution was kept at a value of 9. The process was carried out until a steady state was reached.  The formation of struvite minerals using an insulated column reactor was obtained at conditions of pH 9, operating temperature of 30oC and air rate of 1.25L/min.
Analysis Factors of The Physical Environment on The Risk of Stunting in Pregnant Women Pebriyanti Putri, Rizka; Suprihatin; Siauta, Jenny Anna
International Journal of Midwifery and Health Sciences Vol. 1 No. 1 (2023): IJMHS Vol 1 No 1 (2023)
Publisher : Rajaki of Tulip Medika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61777/ijmhs.v1i1.20

Abstract

Background: Stunting can occur before delivery due to inadequate nutrition during pregnancy, the causes of stunting also include social, physical, and biological environmental factors. Based onthe results of the study, it was found that 52 pregnant women in the second and third trimesters with high-risk pregnancies had the potential to give birth to children at risk of stunting. Purpose: This study aims to determine the relationship between physical environmental factorssuch as sanitation, clean water, family latrines, residential settings, and cigarette smoke pollutantswith the risk of stunting in the working area of the Batu City Health Center, Bogor Regency. Methods: This type of research is an analytic survey with a cross sectional approach. The research sample was 100 pregnant women. The research was conducted in September 2022 usinga questionnaire. Data analysis was performed univariately and bivariately using the Chi Squere statistical test. The frequency distribution of high-risk pregnant women is 52.0%, physicalenvironmental factors are not good sanitation is 68.0%, water is not clean 61.0%, does not have atoilet 55.0%, residential settings are at risk 55.0%, and cigarette smoke pollutants are 67.0%. Result: The results of statistical tests showed that there was a significant relationship between physical environmental factors and the risk of stunting with a p-value below 0.05. Conclusion: There is a significant relationship between sanitation, clean water, family latrines, residential settings, cigarette smoke pollutants with a high risk of pregnancy which has the potential for mothers to give birth to children at risk of stunting. It is expected to improve health education for pregnant women even before conception to create a superior generation free from stunting.
PEMANFAATAN BUAH PEPAYA MENJADI ABON NABATI SEBAGAI UPAYA MENINGKATKAN KESEJAHTERAAN MASYARAKAT Suprihatin; Susilowati, Titi
abdimesin Vol. 3 No. 1 (2023): Abdi-mesin
Publisher : UPN "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/abdimesin.v3i1.44

Abstract

Tanaman pepaya merupakan tanaman yang tumbuh dengan subur pada daerahberiklim tropis maupun sub tropis. Buah tersebut mempunyai kandungan zat-zat nutrisilengkap yang bermanfaat bagi tubuh , yang dapat memproteksi tubuh dari berbagaimacam penyakit. Abon Pepaya menggunakan bahan dasar buah pepaya sebagaipengganti nutrisi dari daging sapi ataupun ayam. Penyuluhan pembuatan abon pepayadilaksanakan di RW IV Kelurahan Medokan Ayu, Kecamatan Rungkut KotamadyaSurabaya, bertujuan untuk memberikan tambahan pengetahuan pada warga agar dapatmemanfaatkan potensi alam yang ada diwilayahnya sehingga nantinya akan dapatmenghasilkan suatu produk unggulan diwilayah tersebut guna meningkatkankesejahteraan masyarakat.
Extraction Flavonoids of Beluntas Leaves (Pluchea indica L.) Using Maceration Method with Fermentation Imanda, Arsyi; Putri Dwi Rahayu; Suprihatin; Sani
Indonesian Journal of Chemical Science Vol. 13 No. 2 (2024): Indonesian Journal of Chemical Science
Publisher : Prodi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v13i2.5163

Abstract

Pluchea Indica L. or beluntas plant is a medicinal plant that contains several bioactive components including tannins, alkaloids, flavonoids, saponins and essential oils. The flavonoids in beluntas leaves can act as antioxidant, anticancer and antidiabetic compounds. This research aims to determine the effect of fermentation time and maceration time and to obtain the best conditions for the flavonoid levels of beluntas leaf extract. One way to obtain high amounts of beluntas leaf flavonoids is by maceration extraction with fermentation of Rhizopus sp. This research was carried out by fermenting beluntas leaf powder using Rhizopus sp at a temperature of 30°C and aerobic conditions with a time of (48; 72; 96; 120; 144) hours. After fermentation, the beluntas leaf powder will be analyzed using UV-Vis spectrophotometry. Next, the beluntas leaf powder will be extracted using the maceration method using 90% methanol solvent with a maceration time (24; 36; 48; 60; 72) hours, then filtered to separate the filtrate and sediment. The filtrate was distilled to obtain beluntas leaf extract, then the beluntas leaf extract was analyzed for flavonoid levels using the UV-Vis Spectrophotometry method. The results showed that fermentation time and maceration extraction time had an effect on the flavonoid content of beluntas leaf extract. The best flavonoid content was obtained at 1.0398% at a fermentation time of 96 hours and a maceration time of 48 hours.
Analysis of pH Regulation on the Ca/P Ratio of Green Mussel Shell Hydroxyapatite using the Sol-Gel Method Edahwati, Luluk; Sutiyono; Suprihatin; Titi Susilowati; Sri Muljani
BIOMEJ Vol. 3 No. 2 (2023): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v3i2.83

Abstract

Kandungan kalsium karbonat dari cangkang kerang hijau dapat dimanfaatkan sebagai salah satu material. Hidroksiapatit merupakan mineral utama yang menyusun tulang dan gigi sehingga memiliki kemiripan dengan bagian mineral pada tulang. Penelitian dilakukan untuk Konsentrasi reagen asam fosfat yang digunakan dan pH reaksi pada perolehan rasio Ca/P dari Hidroksiapatit yang didapatkan melalui proses sintesis dengan menggunakan metode sol-gel. Proses presipitasi calsium carbonat dilakukan dengan menambahkan air sebanyak 50 ml kedalam larutan H3PO4 dengan konsentrasi 1M kemudian diaduk selama 3 jam menggunakan magnetic stirrer dengan kecepatan pengadukan sebesar 300 rpm, pH dijaga 8 – 12 ( variabel ) menggunakan bantuan NaOH. Selanjutnya larutan dilakukan penuaan (waktu aging) pada suhu kamar selama 20 jam sampai terbentuk gel. Gel yang telah terbentuk disaring menggunakan kertas saring watman. Selanjutnya gel dipanaskan dalam oven dengan suhu 105 selama 2 jam. Serbuk yang dihasilkan kemudian difurnace pada temperatur 600oC selama kurang lebih 6 jam supaya membentuk serbuk kering Hidroksiapatit. Rasio Ca/P terbaik sebesar 1,6708 dengan penggunaan H3PO4 sebesar 1M serta pH sebesar 11.
A Performance of Baffled Stirred Tank Reactor in Map Mineral Recovery Luluk Edahwati; Sutiyono; Suprihatin
BIOMEJ Vol. 4 No. 1 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i1.101

Abstract

In the agricultural and wastewater treatment industries, the formation of Magnesium Ammonium Phosphate (MAP), also known as struvite, is an important process to utilize organic waste and produce value-added phosphate fertilizers. In this context, the use of a stirred tank reactor equipped with baffles is a major concern. This study aims to evaluate the performance of a stirred tank reactor with baffles in the recovery of MAP. Analysis of the experimental results shows that the use of baffles has a significant impact on process efficiency and the quality of the MAP product produced. This study provides a deeper understanding of the role of baffles in maintaining the flow pattern and mixing of raw materials in the reactor tank, thus making an important contribution to the development of more efficient and environmentally friendly phosphate fertilizer manufacturing technology. best phosphate obtained 27%, ph 10, temperature 30oC and molar ratio 1:1:2 Keywords: molar ratio, pH, precipitation, RTB, temperature, struvite
Co-Authors Aaliyah Viorella Nada Tamtama Ade Andini Adi, Nugroho Prasetya Afiani, Devi Ilona Afniar Rahmawati, Aulia Ahmad Ajib Ridlwan Aisyah, Aurela Naura Akhmad Kharis Kurniawan Andes Ismayana Aniyatussaidah, Aniyatussaidah Antin Okfitasari, Antin Arfiana Arif Rahman Arif Rahman Arini Gardinia Latifah Ayu Atikah Dewi, Retno Bate'e, Yamowa'a Belani, Maritsa Bima Setyo Nugroho Bunga Tiara Carolin Citra Ashri Maulidina Deti Nurdianah Dian Mursyida, Dian Dikriyah Dinda Sherly Allamanda Dwi Cahyo Setyono E. Rizky Wulandari Edy Kusnadi Efri Yulistika Eni Widiastuti Erlinda, Riska Melati Fajri, Wilda Wirdatul Fauzi, Fuad Firda Aulia Miftahul Zanah Furizal Hafiza, Putri Nur Hardiantika, Widya Hariyadi Hartrisari Hardjomidjojo Haryanto, Totok Hens Saputra Hutauruk, Jeremia Ida Nurjannah Ika Indra Aryani Ika Nawang Puspitawati ilma Imam Riadi Imanda, Arsyi Istihanah Nurul Eskani, Istihanah Nurul Jerricho Ivandro Ekklesia Julian, Alif K. Sumada Kharis Kurniawan, Akhmad Kurnia Khairunnisa Lailatul Soimah Lianty, Leliana Lili Apriyani Lilik Ariyanto Lisa Rizky Amalia Luluk Edahwati Luluk edahwati Maemunah, Imas Maidiantius Tanyid Mariani, Evi Marisi, Dany Poltak Marjunus, Roniyus Matasik, Delfania Mazaya Najmy Tsaqyfa Moh. Yani Muhammad Fikri Mujiburrohman MULYADI Nabilah Nabillah Faradita Hasan Nastiti Siswi Indrasti Nazwatul Padilah NENENG Norma Cahyani Nugraha, Yosep Widi Nurjamilah Nurul Citra Lestari Ono Suparno Paramuji, Muji Pariyanti, Gangsar Pebriyanti Putri, Rizka Pujiastuti, Caecilia Puspita Sari, Ratna Putri Dwi Rahayu Putri Novita Sari Putri Prima, Edelweis Putri, Jesika Kirana R. Dewati Rahayu Kurniawati Rahayu Winarti Rahma Putri Salsabila Rahmi Susanti Ramadhanu Dirja Rara Anggraini Reffy Ananda Rizki Retno Widowati Retno Widowati Rianggi Wahyuni Pratiwi Riesta Ayu Oktarina Rieswana, Yuried Rifdah Rohadatul Aisy Rr. Tsabitah Phalozaky A.P Rudi Nugroho S Sutiyono S. Muljani Sadarela Safira Cecilia Z Salamah Churiyatul Jannah Sani Saputra, Andika Wahyu Sari, Flory Anita Sarmauli Setinawati Shahnez Annisa Mekoa Siauta, Jenny Anna Simon Sembiring Siriatun Nazah Siti Dewi Maharani Sri Muljani SRIE MULJANI Sukard Surya, Agus Sutiyono sutiyono sutiyono Sutrisna, Dadi Tasnim Rahman Fitra Tawar Thohiroh, Aniska Titi Candra Sunarti Titi Susilowati Tri Haryono Trianna, Nurul Widji Tungga Hayu Nirmala, Cipta Ujianto, Virgo Urbanus Utomo, Prasetyo Hadi Vivi Silawati Wibyantri, Gabriella Ananda Widi Astuti Widji Triana, Nurul Wijaya, Safrial Angra Wiwit Sundari Yenni Anwar Yenny Aulya Yunus Triyonggo, Yunus