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Kualitas Mikrobiologis Dan Higiene Pedagang Lawar Di Kawasan Pariwisata Kabupaten Gianyar Purnama, Sang Gede; Purnama, Herry; Subrata, I Made
Jurnal Kesehatan Lingkungan Indonesia Vol 16, No 2 (2017): Oktober 2017
Publisher : Master Program of Environmental Health, Faculty of Public Health, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkli.16.2.56-62

Latar belakang dan tujuan: Kualitas mikrobiologi makanan masih menjadi masalah pada keamanan pangan. Di Bali banyak terdapat pedagang makanan khas tradisional, salah satunya adalah lawar. Lawar tidak hanya disukai oleh masyarakat lokal, tetapi juga oleh wisatawan mancanegara. Pemeriksaan mikrobiologi terhadap lawar perlu dilakukan agar sesuai dengan standar kualitas makanan yang dapat mencegah terjadinya kasus travelerâ€™s diarrhea. Dalam mempersiapkan makanan khas tradisional sebagai food tourism maka diperlukan kajian mengenai kualitas pangan. Hal ini untuk memenuhi keamanan pangan sehingga mampu bersaing di pasar global. Â Penelitian ini bertujuan untuk mengetahui kualitas mikrobiologis dan higiene pedagang lawar di kawasan pariwisata Kabupaten Gianyar, Bali serta proses pengolahan yang baik.Metode: Â Penelitian ini merupakan studi analitik cross sectional dengan pendekatan kuantitatif dan kualitatif menggunakan alat ukur pedoman observasi, wawancara dan pemeriksaan laboratorium. Pengambilan sampel menggunakan teknik random sampling dengan jumlah sampel sebanyak 44 penjamah makanan dan 44 sampel lawar. Wawancaara mendalam dilakukan pada 6 orang pedagang lawar untuk mengetahui proses pengelolaan lawar yang baik. Pemeriksaan E.Coli pada sampel lawar dilakukan di Laboratorium Mikrobiologi Fak. Kedokteran dengan Total Plate Count (TPC) dan Most Probable Number (MPN) yaitu perkiraan jumlah kuman yang mendekati per 100 ml air.Hasil: Proporsi sampel lawar dengan E. coli positif dijumpai sebesar 72,7%. Dari hasil observasi dijumpai bahwa higiene penjamah makanan dalam kategori kurang baik sebesar 72,7%, fasilitas sanitasi kurang memadai 59%, kebersihan lingkungan kurang 54,5%. Hasil analisis bivariat menunjukkan bahwa variabel yang bermakna berhubungan dengan kontaminasi E. Coli yaitu: higiene penjamah makanan (p=0,00), fasilitas sanitasi (p=0,00) dan kebersihan lingkungan (p=0,05).Simpulan : Proporsi lawar yang terkontaminasi E. coli masih sangat tinggi dan hal ini berhubungan dengan higiene penjamah makanan, fasilitas sanitasi dan kebersihan lingkungan.Â Â AbstractBackground and aims: Microbiological quality of food is still a problem on food safety. In Bali there are many traditional food traders, one of which is lawar. Lawar are not only preferred by local people, but also by foreign tourists. Microbiological test to lawar needs to be done to comply with the quality standards of food that can prevent cases of traveler's diarrhea. In preparing traditional food as a food tourism will require assessment of the quality of the food. This is to achieve food safety standards so as to compete in the global market. This study aims to determine the microbiological quality and hygiene lawar traders in the tourist area of Gianyar, Bali as well as hygiene and sanitation models of good food.Methods: This was a cross sectional analytical study with a quantitative and qualitative approach, using a measuring instrument observation, interview and laboratory tests. Sampling using random sampling method with a sample size 44 and 44 samples of food handlers lawar. In-depth interviews were conducted on 6 lawar traders to know how to create a good lawar. E. coli in samples lawar examination conducted at the Laboratory of Microbiology, Faculty of Medicine with Total Plate Count (TPC) and the Most Probable Number (MPN), which estimates the number of germs.Results: The proportion of samples positive lawar with E. coli was found at 72.7%. From the observation found that the hygiene of food handlers in the unfavorable category as much as 72.7%, inadequate sanitation facilities 59%, 54.5% less environmental hygiene. Results of bivariate analysis showed that the variables significantly associated with E. Coli contamination namely: hygiene of food handlers (p = 0.00), sanitary facilities (p = 0.00) and sanitation (p = 0.05).Conclusions: The proportion lawar contaminated with E. coli is still very high and this is associated with a food handler hygiene, sanitation and environmental hygiene.

TINJAUAN KUAT TEKAN DAN KANDUNGAN B3 TERLARUT DALAM BETON DENGAN AGREGAT BUATAN BERBAHAN DASAR BOTTOM ASH BATU BARA Tohir, Abdul Rochman; Solikin, Mochamad; Purnama, Herry
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 29 No. 1 (2024): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v29i1.5646

Coal is an efficient fuel with stable heat production, so many industries use it as an energy source for the production and generation of electrical energy. Burning coal produces bottom ash waste in the combustion furnace and is categorized as B3 waste according to Government Regulation number 22 of 2021. This research is to create an alternative utilization and processing of coal bottom ash waste that is useful but still safe for the environment, namely by utilizing coal bottom ash in a ratio of 10% to 60% to sand plus cement as a binding material to form artificial aggregates, artificial aggregates are made into concrete mixtures. with a ratio of 1 cement: 2 sand and 3 artificial aggregates in the weight ratio of the materials. In this research, the maximum compressive strength value of concrete was obtained at f'c 13.89 (141.54 kg/cm2) at a ratio of 10% with a soaking time of 28 days, according to the maximum compressive strength value, coal bottom ash can be used as C quality concrete bricks. Leaching tests on 10 (ten) B3 parameters showed that Boron (B) compounds were detected above the quality standard, namely 27.62 mg/L in bottom ash, but the concentration decreased in artificial aggregates and was only 3.281 mg/L in concrete samples, while for other B3 compound parameters, the total concentration is below the specified quality standards.

Penghilangan Rhodamin B dari Limbah Cair Menggunakan Pelarut Minyak Goreng Bekas dalam Membran Cair Emulsi Purnama, Herry; Jannah, Nabilah Miftachul; Hidayati, Nur
Eksergi Vol 21, No 2 (2024)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v21i2.12005

Perkembangan industri tekstil dapat meningkatkan pencemaran air akibat zat warna yang terbuang bersama limbah cair yang membahayakan mahluk hidup dan lingkungan sekitarnya sehingga diperlukan suatu proses pengolahan limbah cair zat warna. Tujuan penelitian ini adalah penghilangan zat pewarna kationik rhodamin B dalam aliran air berbasis minyak jelantah dalam proses ELM dengan pengaruh variasi konsentrasi Span 80 dan konsentrasi fase internal HCl. Variasi konsenstrasi HCl (0,01; 0,1; 1; 2 M) dan konsentrasi span 80 (1; 2; 3; 4 %b/v) sebagai variabel bebas. Efisiensi ekstraksi zat warna rhodamin B, kerusakan emulsi, dan stabilitas emulsi sebagai variabel terikat. Variabel tetapnya adalah volume membran 25 ml, konsentrasi fase eksternal rhodamin B 5 ppm, rasio volume fase internal dengan fase membran 1:3, rasio volume fase membran dengan fase eksternal 1:3, konsentrasi D2EHPA 2,5%, kecepatan emulsifikasi 1200 rpm selama 25 menit, kecepatan pengadukan 200 rpm selama 7 menit dan didiamkan 50 menit. Pengujian menggunakan spektrofotometer UV-Vis dengan panjang gelombang 557 nm. Persentase ekstraksi maksimum yang dicapai sebesar 88,79% dengan stabilitias emulsi 75,86%. Kerusakan emulsi tiap variasi < 20%. Analisis data menggunakan ANOVA two factor with replication dengan hasil yang signifikan.

Pengaruh Jarak Elektroda dan Tegangan terhadap Efektivitas Pengolahan Air Lindi dengan Metode Elektrokoagulasi-Adsorpsi Zeolit Fadhila, Anisa Nur; Purnama, Herry
Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v11i1.8284

The problem that has been difficult to overcome until now is the waste problem. Landfilling remains a method that is often used but has a disadvantage in the form of leachate production. Leachate or leachate is defined as wastewater produced from Final Disposal Sites (TPA). The combination of electrocoagulation and adsorption methods can be a promising treatment technology. The electrocoagulation process was carried out for 1 hour using iron electrodes. The variations used are electrode distances consisting of 1 cm, 1.5 cm, and 2 cm while the voltages consist of 10 volts, 20 volts, and 30 volts. In adsorption, zeolite adsorbent was used with a residence time of 2 hours. The research stages started from the preparation of leachate samples, examination of initial characteristics, leachate treatment, and testing of COD, TSS, and pH. The results showed that the optimal variation was obtained at a distance of 1 cm and a voltage of 30 volts with a COD efficiency of 98.84% and TSS of 99.82%. For the pH value, the result is that the greater the distance between the electrodes and the voltage, the higher the pH value obtained.

Pengaruh Jarak Elektroda dan Tegangan terhadap Efektivitas Pengolahan Air Lindi dengan Metode Elektrokoagulasi-Adsorpsi Zeolit Fadhila, Anisa Nur; Purnama, Herry
Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

The problem that has been difficult to overcome until now is the waste problem. Landfilling remains a method that is often used but has a disadvantage in the form of leachate production. Leachate or leachate is defined as wastewater produced from Final Disposal Sites (TPA). The combination of electrocoagulation and adsorption methods can be a promising treatment technology. The electrocoagulation process was carried out for 1 hour using iron electrodes. The variations used are electrode distances consisting of 1 cm, 1.5 cm, and 2 cm while the voltages consist of 10 volts, 20 volts, and 30 volts. In adsorption, zeolite adsorbent was used with a residence time of 2 hours. The research stages started from the preparation of leachate samples, examination of initial characteristics, leachate treatment, and testing of COD, TSS, and pH. The results showed that the optimal variation was obtained at a distance of 1 cm and a voltage of 30 volts with a COD efficiency of 98.84% and TSS of 99.82%. For the pH value, the result is that the greater the distance between the electrodes and the voltage, the higher the pH value obtained.

Synthesis and Characterisation of Graphene Oxide Catalysts for Glycerol Acetylation Hidayati, Nur; Khoiruddin, Wahib; Purnama, Herry; Effendy, Marwan
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 2 Year 2024 (August 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20146

Glycerol in large quantities as a by-product of biodiesel production is a promising feedstock to be converted into more valuable products such as acetin. In this work, acetin converted from glycerol acetylation with acetic acid was performed over graphene oxide as a catalyst in a batch reactor. The study's objective was to evaluate the effect of sodium nitrate amount in the catalyst preparation on the catalyst's characteristics and catalytic performance. The graphene oxide (GO) catalysts were characterised by various tests, such as SEM-EDX for their morphology, the nitrogen adsorption capacity using Breneur-Emmet Teller (BET), structural analysis using XRD, functional group using FTIR, and catalytic activity on glycerol acetylation. The GO1, GO2, and GO3 catalysts were varied based on the NaNO3 amount in the modified Hummer method. The experiments found that the NaNO3 amount in catalyst preparation plays a vital role in GO structure formation. The GO2 catalyst has the highest performance, as indicated by the highest surface area, pore volume, and size. High glycerol conversion (94 %) and selectivity toward the interest products of triacetin (24 %) and diacetin + triacetin (83 %) were reached in 2 h of reaction using three wt.% catalysts, 110 °C reaction temperature, and 1:9 molar ratio of glycerol to acetic acid. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Budidaya Maggot Black Soldier Fly untuk Pengolahan Sampah Organik bagi Warga Makamhaji, Sukoharjo: Cultivation of Black Soldier Fly Maggots for Organic Solid Waste Treatment for Makamhaji Residents, Sukoharjo Purnama, Herry; Triyono, Agus; Kuswati, Rini; Hidayati, Nur
PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat Vol. 10 No. 3 (2025): PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/pengabdianmu.v10i3.8421

The solid waste problem is still a topic of discussion in various forums. One of the most densely populated villages in Sukoharjo Regency, i.e. Makamhaji Village, produces a large volume of waste, and is a problem in itself. This Community Service Program invites the people of Windan, Makamhaji to process household organic solid waste through maggot bioconversion which can also have economic value. The team carried out socialization and community empowerment activities to reduce the amount of waste through maggot cultivation which can decompose organic waste into protein as part of the life cycle of black soldier flies (BSF). This program aims to provide technological information in maggot cultivation and improve the quality of human resources. The methods applied are through training, mentoring, monitoring, evaluation, provision and lending of facilities, and increasing cooperation networks with business actors in the field of waste processing. Community service activities have succeeded in fostering residents to carry out maggot cultivation and are quite productive so that they can increase income.

PENGARUH KECEPATAN PENGADUKAN DAN KONSENTRASI AKTIVATOR ARANG TEMPURUNG KELAPA PADA PROSES KOAGULASI-ADSORPSI LIMBAH LAUNDRY Purnama, Herry
CHEMTAG Journal of Chemical Engineering Vol 5, No 1 (2024): CHEMTAG Journal of Chemical Engineering
Publisher : Universitas 17 Agustus 1945 (UNTAG) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/cjce.v5i1.4867

Industri laundry semakin merebak dan berpotensi memiliki dampak yang berbahaya bagi lingkungan sekitar dan kesehatan makhluk hidup karena bahan yang digunakan yaitu deterjen yang bersifat toksik. Sementara itu limbah padat tempurung kelapa banyak terdapat di Indonesia karena sebagian wilayahnya sebagai penghasil kelapa. Potensi yang besar dari tempurung kelapa dapat dijadikan partikel karbon atau arang aktif berukuran mikro yang digunakan sebagai adsorben atau penjerab senyawa polutif dalam air maupun limbah cair. Tujuan penelitian ini adalah (1) mengetahui pengaruh dari waktu pengadukan pada pengolahan limbah cair laundry dengan menggunakan partikel mikro arang aktif dari tempurung kelapa; dan (2) mengetahui pengaruh dari konsentrasi aktivator pada pembuatan arang tempurung kelapa; serta (3) mengetahui penurunan kadar chemical oxygen demand (COD) dan total suspensed solids (TSS) pada pengolahan limbah cair laundry dengan menggunakan metode koagulasi-adsorpsi berbasis arang aktif. Hasil penelitian menunjukkan bahwa gabungan proses tersebut mampu mengolah air limbah laundry dengan perolehan efisiensi penurunan COD sebesar 91,02% dan penurunan TSS sebesar 87,10%.

Application of Used Cooking Oil Based Emulsion Liquid Membrane for Rhodamine B Extraction Hidayati, Nur; Kamaratih, Azzahra Ardya; Purnama, Herry
Jurnal Rekayasa Kimia & Lingkungan Vol 19, No 2 (2024): Jurnal Rekayasa Kimia & Lingkungan (December, 2024)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v19i2.37747

Used cooking oil is utilized as a nontoxic and environmentally friendly organic diluent without the need for complicated pretreatment. Cationic dye rhodamine B was chosen as a sample because of its ability to decolorize water and its use as a base material in toxic, carcinogenic, and mutagenic textile dyes. This study investigates the extraction of rhodamine B from water using cooking oil-based Emulsion Liquid membrane (ELM) methods. This approach addresses issues associated with petroleum-based organic diluents commonly used in ELM processes. The research aimed to evaluate the effect of rhodamine B concentrations ranging from 5 to 20 ppm and D2EHPA concentrations from 0.5 to 2.5% on extraction efficiency. The emulsion was prepared using used cooking oil as the diluent, Span 80 as the surfactant, D2EHPA as the carrier, and HCl as the internal phase. The concentration of rhodamine B in the external phase was determined using a UV-Vis Spectrophotometer. Both rhodamine B concentration and D2EHPA concentration significantly affected extraction efficiency. The highest extraction efficiency of 92.83% was achieved with a rhodamine B concentration of 15 mg/L and a D2EHPA concentration of 2.5% (v/v).

Karakteristik Membran sPEEK-Kitosan dengan Bahan Pengisi Silika-carbon nanotube untuk Sel Bahan Bakar Metanol Zulfikar, Muhammad; Hidayati, Nur; Mujiburahman, Muhammad; Purnama, Herry
Prosiding University Research Colloquium Proceeding of The 10th University Research Colloquium 2019: Bidang Teknik dan Rekayasa
Publisher : Konsorsium Lembaga Penelitian dan Pengabdian kepada Masyarakat Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

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

Sel bahan bakar metanol atau Direct methanol fuel cell (DMFC)merupakan penyedia energi listrik yang berpotensi untukdikomersialkan. Membran Poli eter eter keton tersulfonasi (sPEEK)yang memiliki memiliki stabilitas kimia dan mekanik yang baik sertacrossover metanol yang rendah terus dikembangkan agar layakmenjadi membran untuk DMFC. Penyilangan sPEEK dengan kitosan(CS) dapat meningkatkan stabilitas dimensi membran. PengisiansPEEK-CS dengan silika yang dilapisi carbon nanotube (SCNTS)ditujukan untuk meningkatkan karakteristik membran. Penelitian inibertujuan untuk mengkaji pengaruh muatan SCNTS dengan variasi(0,3,6,9,12,15)% pada sPEEK-CS yang menggunakan rasio 80:20terhadap sifat water uptake, swelling degree dan kapasitas penukarion. Hasil menunjukkan bahwa sifat membran sPEEK-CS/SCNTSyang diuji dipengaruhi oleh banyaknya muatan SCNTS dalammembran dan memiliki karakter yang lebih baik sebagai membranDMFC.

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