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All Journal Reaktor Jurnal Teknik Kimia Jurnal Fisika Unand JURNAL INTEGRASI PROSES JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Jurnal Pengbdian Teknik Mesin Biomedical and Mechanical Engineering Journal Advance Sustainable Science, Engineering and Technology (ASSET)
S Suprihatin
Chemical Enggineering Department, Faculty Of Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia
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Synthesis of Matrix Si-K-HAs Gel from Geothermal Sludge and Peat Srie Muljani; Bambang Wahyudi Wahyudi; S Suprihatin; Ketut Sumada
Reaktor Volume 18 No. 2 June 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4869.103 KB) | DOI: 10.14710/reaktor.18.2.76-83

Abstract

The synthesis of matrix silica-potassium-humic acid gel (Si-K-HAs) has been performed successfully by gradual extraction and acidification method. The extraction was carried out in two stages: 1) extraction of humic substances from peat prepared by potassium hydroxide to produce potassium humate (K-HAS) solution, 2) extraction silica from geothermal sludge using K-HAs solution to produce Si-K-HAs solution. Acidification of Si-K-HAs solution prepared by citric acid (1-3N) to produce matrix gel of Si-K-HAs. The Si-K-HAs matrix gel products are characterized by Fourier Transform InfraRed (FTIR), X-ray fluroscence (XRF), and Brunauer–Emmett–Teller (BET) analysis. The acidification process was carried out in neutral to acid (pH 3-7) conditions and the results showed that at neutral pH no Si-K-HAs gel formed. IR spectra confirmed the presence of humic acid in the gel product, whereas XRF analysis confirmed the presence of potassium (K) and silica (SiO2) in the gel product. The molar ratio of SiO2:K2O in the product is 0.9 - 0.3 in the pH range of 3-5. Si-K-HAs powder can be used as soil fertilizer especially for soils that lack silica, humic, and potassium nutrients or for future application development. Keywords: gradual extraction; geothermal sludge; matrix gel; humic substance
Analysis of Air Flow Rate in Bulkhead Reactors on Struvite Mineral L Edahwati; S Sutiyono; Suprihatin
Biomedical and Mechanical Engineering Journal (BIOMEJ) Vol. 2 No. 1 (2022): BIOMEJ
Publisher : Mechanical Engineering Department at Universitas Pembangunan Nasional "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.
Peningkatan Kualitas dan Produktifitas Sambal Kerang dengan Mesin Pelumat dan penggoreng Mekanik di Sentra Ikan Bulak Surabaya Nurul Widji Triana; Suprihatin Suprihatin; Lilik Suprianti
JPP IPTEK (Jurnal Pengabdian dan Penerapan IPTEK) Vol 4, No 2 (2020)
Publisher : LPPM ITATS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jpp-iptek.2020.v4i2.858

Abstract

Kerang merupakan salah satu hasil laut yang banyak terdapat di perairan Kenjeran, Surabaya. Kerang- kerang yang berukuran kecil dan kualitas rendah kurang laku di pasaran. Sehingga untuk meningkatkan nilai tambah, kerang kerang kecil tersebut diolah menjadi produk makanan seperti sambal kerang dan abon kerang.  UKM Bunda adalah kelompok usaha bersama yang bergerak di bidang pengolahan teripang dan kerang yang berlokasi di sentra pengolahan hasil laut kelurahan kedung cowek, kecamatan Bulak Surabaya. Walaupun banyak diminati wisatawan, namun produk olahan kerang dari UKM Bunda belum dapat memenuhi permintaan pasar karena proses produksi yang masih dilakukan secara konvensional. Peralatan yang dipakai masih sederhana sehingga proses produksi  memerlukan waktu yang lama serta produk yang kurang terjaga kualitasnya. Pada kegiatan pengabdian masyarakat ini  dilakukan mekanisasi dalam proses pembuatan sambal kerang dan abon kerang dengan mengaplikasikan hasil teknologi Tepat Guna (TTG) dari UPN Veteran Jawa timur berupa mesin pelumat(telah terdaftar di HaKI desain industri A-00201204059), dan mesin penggoreng mekanik (tersertifikasi HaKI IDD-00000938) dengan mitra UKM Bunda. Peningkatan kualitas Sumber Daya Manusia dan penguatan kelembagaan juga dilakukan untuk memberikan wawasan kepada pelaku UKM terhadap bisnis dan pemasaran. Dampak yang dirasakan dari kegiatan pengabdian masyarakat ini adalah adanya peningkatan produksi sambal kerang dari 5 kg/minggu  menjadi 25kg/minggu. Proses produksi  lebih higienis serta kualitas semakin terjaga.
Improvement of Seawater Salt Quality by Hydroextraction Method Ketut Sumada; Retno Dewati; Suprihatin
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology in Publication, Implementation and Co
Publisher : Future Science

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Abstract

Indonesia is one of the salt producing countries that use sea water as a source of raw materials, the quality of salt produced is influenced by the quality of sea water. The resulting average salt quality contains 85-90% NaCl. Those salt quality are still below of the Indonesian National Standard (SNI) for human salt’s consumption sodium chloride content is 94.7 % (dry base) and for industrial salt 98,5 %. The improvement of seawater salt quality can be done by several methods: leaching (hydro-extraction), re-crystallization without chemicals or with chemicals, and ion exchangers. In this study we studied the improvement the quality of seawater salt by hydro-extraction method. The objective of this research to improve the quality of seawater salt by hydro-extraction method. The hydro-extraction is a method to improve the quality of salt by washing with saturated salt solution, this method influence by size of salt (diameter), time of hydro-extraction, saturated salt solution concentration and recycle time of saturated salt solution. Based on the results of the research, the hydro-extraction method can produce salt with purity 99,34 % NaCl. The condition is achieved at 30/40 mesh salt size and the time of use of saturated salt solution 5 times.
Precipitated Silica from Pumice and Carnondioxide Gas (Co2) in Bubble Column Reactor Retno Dewati; Suprihatin; Ketut Sumada; Sri Muljani; Meutia Familya; Silviana Ariana
Nusantara Science and Technology Proceedings International Seminar of Research Month Science and Technology in Publication, Implementation and Co
Publisher : Future Science

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Abstract

Precipitated silica is a silica product, containing silica, a white powder, a large enough porous and nano particle sized. The precipitated silica products are needed to support the operation of various types of industries such as automotive tire industry, rubber industry, cosmetics industry, electronics industry, agriculture and others. This precipitate silica can be produced by a chemical reaction process between the sodium silicate solution and various types of acids such as hydrochloric, sulfuric, acetate and other acids. In this study, the source of silica was obtained from a pumice while precipitation formation was carried out with the use of carbon dioxide gas (CO2). The sodium silicate solution was obtained by extracting the silica contained in a pumice with sodium hydroxide (NaOH) solution and heated to 100C for 1 hours. The carbon dioxide gas is injected into the aqueous solution of sodium silicate in a bubble column reactor and there is a reaction to form a precipitated silica. Based on research results found that the quality of precipitated silica has a quality: white colors, 85-90% silica content, 12-20% aluminum oxide content and surface area 108-227 m2/g. The
Effect of Cellulose on The Characterization of Potassium Silica – Humat Composite Gel Suprihatin; Ika Nawang Puspitawati; Putri Sinta Dewi Sinaga; Mohamad Nabhan Putra Redian
Nusantara Science and Technology Proceedings 2nd International Conference Eco-Innovation in Science, Engineering, and Technology
Publisher : Future Science

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Abstract

Potassium-Silica Humate Composite Gel or K-Si-Humate Composite Gel is a combined material of Potassium and Silica Humate derived from the extraction of raw materials for geothermal sludge and peat soil. This material is a multipurpose material, which can be used to improve soil aeration and as a fertilizer that can fertilize the soil because it contains humic acid. The purpose of this study was to examine the effect of cellulose content on the characteristics of the Potassium Silica-Humate composite gel. The manufacture of K-Si-Humate Composite Gel in this research by extracting potassium and silica from geothermal sludge and humic acid from peat soil, then the process of filtration and gel formation. The variable used is the addition of carboxymethyl cellulose content, namely Carboxy Methyl Cellulose (CMC). The best results from this study showed that with the addition of CMC, the highest silica content was 15.85%, and the highest potassium content was 89.88%.
Pemanfaatan Koran Bekas Menjadi Produk Kerajinan Multiguna Suprihatin
Abdi-mesin: Jurnal Pengabdian Masyarakat Teknik Mesin Vol. 1 No. 1 (2021): Abdi-Mesin
Publisher : Program Studi Teknik Mesin Universitas Pembangunan Nasional "Veteran" Jawa Timur

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Abstract

Limbah Sampah anorganik khususnya kertas Koran bekas merupakan sampah yang sulit terurai di tanah. Melalui penerapan prinsip 3 R: Reduce , Reuse dan Recycle, maka pemanfaatan kembali kertas koran bekas menjadi kerajinan yang berkualitas , bermanfaat serta bernilai ekonomis tinggi. Selain juga dapat mengurangi terjadinya pemcemaran lingkungan. Pelatihan ditujukan kepada masyarakat warga RT 005 RW 001 Kelurahan Wiyung, Kecamatan Wiyung, Kota Surabaya Tujuan dari kegiatan ini adalah memberdayakan dan memotivasi masyarakat untuk peduli lingkungan dan menumbuhkan jiwa kemandirian berwirausaha serta membuka lapangan pekerjaan bagi masyarakat. Melalui kreativitas dan inovasi daur ulang limbah koran bekas tersebut diharapkan dapat berdaya guna serta dapat meningkatkan perekonomian keluarga.
Characteristics Biobriquettes from Mushroom Baglog Waste Carbonization Production Ika Nawang Puspitawati; Kindriari Nurma Wahyusi; Sintha Soraya Santi; Suprihatin; Erwan Adi Saputro; Novel Karaman
International Journal of Eco-Innovation in Science and Engineering (IJEISE) Vol. 4 No. 1 (2023): IJEISE
Publisher : International Journal of Eco-Innovation in Science and Engineering (IJEISE)

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Abstract

Bio briquette is a briquette based on agricultural waste because it is deliberately made from biomass charcoal. The utilization of agricultural waste such as mushroom planting media to be processed as bio briquette requires a very cheap cost. Bio briquettes that are processed properly and correctly, will produce high-quality briquettes. The purpose of this study was to produce a biobriquette from baglog mushroom waste and to determine the characteristics of the biobriquette. The research material used consisted of 400 grams of mushroom baglog waste and 40 grams of starch as adhesive. The briquette dough is then printed cylindrical. The printed briquettes are then heated at 80°C for 5 hours to reduce the moisture content. The result of smoke test is the smoke will stop in 17 seconds with the color of the smoke is white. The Combustion of speed test, the results obtained are 0,0019 gram/second with an initial sample weight of 2, 4 grams and burning for 20 minutes 35 seconds with a final sample weight of 0,387 grams. The result of ash content is 0.16%. This result is in accordance with the SNI issued by our government. SNI of ash content is max 8 %.
ISOLASI ALFA-SELULOSA DARI SABUT KELAPA MUDA SEBAGAI ADSORBEN LOGAM BERAT Septiyafani, Ayu; Muliawan, Alvin Rizky; Suprihatin, Suprihatin
Jurnal Teknik Kimia Vol 18, No 2 (2024): Jurnal Teknik Kimia
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v18i2.4415

Abstract

Salah satu sumber daya alam di Indonesia yang jarang dimanfaatkan adalah sabut kelapa muda. Sabut kelapa muda mengandung 42,6% selulosa dan 22% lignin. Berdasarkan hal tersebut, dilakukan isolasi sabut kelapa muda agar diperoleh α-selulosa dengan kemurnian yang tinggi. Hasil α-selulosa yang diperoleh dianalisa gugus fungsi dengan FT-IR, kemudian digunakan sebagai bioadsorben logam berat Cu2+ dan Ni2+ pada limbah industri elektroplating. Metode yang digunakan adalah isolasi secara kimia meliputi proses pretreatment, delignifikasi lignin, dan bleaching. Penelitian ini dilakukan dengan menggunakan variasi konsentrasi Na2SO3 dan suhu pada proses delignifikasi lignin. Hasil isolasi α-selulosa terbaik akan dilakukan proses absorbsi terhadap logam berat. Hasil kandungan α-selulosa terbaik adalah pada perlakuan suhu 100 ˚C dan konsentrasi larutan Na2SO3 sebesar 20,4% yaitu sebesar 91,7%. Proses absorbsi logam berat dengan α-selulosa hasil isolasi diperoleh penurunan kadar logam berat Nikel (Ni2+) dan Tembaga (Cu2+) sebanyak 59,6% dan 69,2%. DOI: https://doi.org/10.33005/jurnal_tekkim.v18i2.4415
SINTESIS DAN KARAKTERISASI NANOKALSIUM OKSIDA DARI CANGKANG KERANG HIJAU DENGAN METODE PRESIPITASI Adji, Nafisa Tera Lintang; Lucytasari, Silvia Dyah; Suprihatin, Suprihatin
Jurnal Teknik Kimia Vol 18, No 1 (2023): Jurnal Teknik Kimia
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v18i1.4127

Abstract

Kerang hijau merupakan jenis kerang yang cukup diminati dan banyak dikonsumsi oleh masyarakat Indonesia. Pemanfaatan kerang sebagai bahan konsumsi masyarakat ini yang menyebabkan adanya limbah cangkang yang belum dimanfaatkan secara efektif. Kandungan tertinggi pada cangkang kerang hijau adalah CaCO3 yaitu sebesar 95,67%. Hal tersebut dapat dimanfaatkan sebagai sumber kalsium dalam pembuatan nanokalsium oksida. Teknologi nano dapat digunakan untuk memperkecil ukuran kalsium sehingga memiliki ukuran sebesar (10-100nm) atau yang disebut dengan nanokalsium. Penelitian ini dilaksanakan dengan tujuan untuk mensintesis nanokalsium oksida dari limbah cangkang kerang hijau dan mengetahui karakteristinya dengan menggunakan metode presipitasi. Sintesis nanokalsium oksida dilakukan dengan mereaksikan serbuk cangkang kerang hijau dengan HCl konsentrasi 1N,2N,3N,4N dan 5N selama waktu ekstraksi 0,5 jam,1 jam,1,5 jam,2 jam, dan 2,5 jam. Hasil reaksi kemudian dipresipitasi menggunakan KOH 3N, endapan yang diperoleh dilakukan proses furnace selama 1 jam pada suhu 600°C. Hasil analisa SSA diperoleh %kadar Ca tertinggi pada konsentrasi HCl 3N dengan waktu ekstraksi 2,5jam yaitu sebesar 93,93% Ca. Hasil analisa SEM-EDX diperoleh bahwa nanokalsium oskida pada konsentrasi 3N 2,5jam memiliki ukuran partikel dengan range 314-380nm. DOI : https://doi.org/10.33005/jurnal_tekkim.v18i1.4127
Co-Authors Adinda Putri Cahyani Adji, Nafisa Tera Lintang Alia Febrianti Muliina Alif Julian AR Yelvia Bambang Wahyudi Wahyudi Caecilia Pujiastuti Caecillia P udjiastuti Dona Avrilia Kristanti Dwi Ayu Febrianti Erwan Adi Saputro Fidela Lathifa Haryati Halim, Muhammad Dani Ika Nawang Puspitawati Ima Putriana Karangan, Adam Ketut Sumada Kindriari Nurma Wahyusi Krisna Kumara Dewa L Edahwati Labib, Ahmad Nauval Lucytasari, Silvia Dyah Meiska Dyah Meutia Familya Mohamad Nabhan Putra Redian Mohammad Iqbal Mr. Sutiyono Muhammad Fikri Muhammad Hilmi Marzuqi Muhimatur Rosida Muliawan, Alvin Rizky Mutasim Billah Nana Roudlotul Fitri Nandini , Atika Novel Karaman Nur Aini Fauziyah Nur Aini Fauziyah Nurul Widji Triana Puspa Prima Andini Putri Sinta Dewi Sinaga Ramjani, Muhammad Rifki Retno Dewati Sani Selvia Sofi Yanti Septiyafani, Ayu Silviana Ariana Sintha Soraya Santi Siswati, Nana Dyah Sri Muljani SRIE MULJANI Suprianti, Lilik Susilowati Susilowati Trianna, Nurul Widji