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Analisis Kepuasan Relawan Baznas Kota Depok Pada Pelatihan Virtual Pembuatan Handsanitizer Berstandar WHO Herliati Herliati; Yeti Widyawati; Mubarokah N D; Dody Guntama; Lukman Nulhakim
Jurnal Pengabdian Masyarakat Teknik Vol 3, No 1 (2020): Jurnal Pengabdian Masyarakat Teknik (JPMT)
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jpmt.3.1.31-38

Kajian ini bertujuan untuk mengetahui Indeks Kepuasan dan tingkat kepuasan Peserta Pelatihan pembuatan hand sanitizer. Landasan pemikiran dalam kajian ini adalah untuk membandingkan pelayanan Pelatihan yang dilaksanakan oleh dosen-dosen Fakultas Teknologi Industri Universitas Jayabaya (FTIUJ) yaitu antara kenyataan dengan harapan peserta pelatihan yang diukur dengan 7 indikator Indeks Kepuasan Masyarakat (IKM). Sampel dalam penelitian ini adalah sebanyak 20 responden dari perserta Pelatihan yaitu relawan BAZNAS Kota Depok. Jenis data yang digunakan adalah data primer yang dilakukan melalui penyebaran kuesioner. Sedangkan metode analisis data menggunakan Uji Validitas, Uji Reliabilitas, dan Analisis Indeks Kepuasan Masyarakat. Hasil analisis Pelatihan Pembuatan hand sanitizer kepada relawan BAZNAS Kota Depok, diperoleh rata-rata nilai indeks 3,5 dari 7 variabel yang berada dalam nilai interval 2,86 – 4,00 atau nilai interval konversi sebesar 88,2% yang berada dalam nilai interval konversi antara 81,26 – 100,00. Angka ini menunjukkan bahwa Mutu Pelayanan program Pengabdian Kepada Masyarakat oleh dosen-dosen FTIUJ mendapatkan nilai A yang berarti “Sangat Baik/Sesuai”.

Investigating the potential of avocado seeds for bioethanol production: A study on boiled water delignification pretreatment Herliati Rahman; Ayu Nehemia; Hadiatun Puji Astuti
International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2023.52532

The increasing need for alternative fuels to replace fossil fuels has made bioethanol a promising option. Although numerous sources of sugar generation and agricultural wastes can be converted into ethanol, Avocado Seeds (AS) are particularly attractive as raw materials due to their abundance, high carbohydrate content, and lack of interactions with the food chain. Therefore, this study investigated the potential of AS for bioethanol production using several steps, including boiled water delignification pretreatment, catalytic hydrolysis, and fermentation with Saccharomyces cerevisiae. The delignification pretreatment of AS involved soaking in 4% (w/v) sodium hydroxide liquor for 24 hours. Then the mixture was heated to 80°C and stirred slowly for 2.5 hours and after that washing with boiled water at 100 oC for 1.5 hours and screening the mixture. Subsequently, catalytic hydrolysis and fermentation were carried out using two different concentrations of Saccharomyces cerevisiae as yeast, namely 10% (w/v) and 15% (w/v). Qualitative sample analysis was conducted using scanning electron microscopy (SEM) to observe the effect of delignification pretreatment, while FTIR analysis using Thermo Scientific Nicolet iS50 was used to test for glucose functional groups. Quantitative analysis was performed using gas chromatography 7890b mass spectrophotometry 5977A, Agilent DBVRX to determine hydrolysate fermentation. The results revealed that the highest ethanol yield was achieved through fermentation with 15% (w/v) yeast and 40% (v/v) catalyst, resulting in an ethanol yield of 83.755% of the theoretical maximum.

Optimasi Clinker Ratio Pada Portland Pozzoland Cement (PPC) Dengan Pozzoland Fly ash Herliati herliati; Dyah Puspita Asyha; Lukman Nulhakim
Jurnal Migasian Vol 4 No 2 (2020): Jurnal Migasian
Publisher : LPPM Institut Teknologi Petroleum Balongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36601/jurnal-migasian.v4i2.126

Portland Pozzoland Cement (PPC) adalah semen hidrolis yang terdiri dari campuran homogen antara semen portland dan pozzoland halus. Semen ini dihasilkan dengan cara menggiling clinker, limestone, gypsum, fly ash secara bersama-sama sehingga partikel memiliki kehalusan tertentu. Penelitian ini bertujuan untuk mengetahui pengaruh subtitusi klinker oleh fly ash terhadap sifat kimia dan fisika semen. Secara kimia, kandungan MgO dan SO3 berpengaruh pada kualitas semen dianalisis menggunakan X-RayFluorescence (XRF). Selain itu juga dilakukan pengujian terhadap lama waktu pengikatan dan kuat tekan mortar. Metode yang dilakukan untuk pengujian sifat fisika semen dilakukan sesuai dengan standar ASTM C270 dan SNI 0302-2014. Komposisi fly ash yang ditambahkan ke dalam campuran bervariasi dalam kisaran 6% sampai dengan 40% berat. Lama waktu pengikatan dan kuat tekan ditentukan pada umur mortar 1, 3, 7, dan 28 hari. Hasil analisis memperoleh nilai optimum pada sampel PPC-8 dimana komposisi fly ash 40%. Pada komposisi optimum ini diperoleh kuat tekan sebesar 423 kg/cm2, kehalusan semen 3760 cm2/gr, waktu pengikatan awal 155 menit dan waktu pengikatan akhir 215 menit

Investigating the potential of avocado seeds for bioethanol production: A study on boiled water delignification pretreatment Herliati Rahman; Ayu Nehemia; Hadiatun Puji Astuti
International Journal of Renewable Energy Development Vol 12, No 4 (2023): July 2023
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2023.52532

The increasing need for alternative fuels to replace fossil fuels has made bioethanol a promising option. Although numerous sources of sugar generation and agricultural wastes can be converted into ethanol, Avocado Seeds (AS) are particularly attractive as raw materials due to their abundance, high carbohydrate content, and lack of interactions with the food chain. Therefore, this study investigated the potential of AS for bioethanol production using several steps, including boiled water delignification pretreatment, catalytic hydrolysis, and fermentation with Saccharomyces cerevisiae. The delignification pretreatment of AS involved soaking in 4% (w/v) sodium hydroxide liquor for 24 hours. Then the mixture was heated to 80°C and stirred slowly for 2.5 hours and after that washing with boiled water at 100 oC for 1.5 hours and screening the mixture. Subsequently, catalytic hydrolysis and fermentation were carried out using two different concentrations of Saccharomyces cerevisiae as yeast, namely 10% (w/v) and 15% (w/v). Qualitative sample analysis was conducted using scanning electron microscopy (SEM) to observe the effect of delignification pretreatment, while FTIR analysis using Thermo Scientific Nicolet iS50 was used to test for glucose functional groups. Quantitative analysis was performed using gas chromatography 7890b mass spectrophotometry 5977A, Agilent DBVRX to determine hydrolysate fermentation. The results revealed that the highest ethanol yield was achieved through fermentation with 15% (w/v) yeast and 40% (v/v) catalyst, resulting in an ethanol yield of 83.755% of the theoretical maximum.

Purifying Crude Glycerol from Biodiesel Production for Sustainable Energy Solutions Rahman, Herliati
Jurnal Teknologi Vol. 11 No. 1 (2023): JURNAL TEKNOLOGI
Publisher : Universitas Jayabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31479/jtek.v11i1.269

Biodiesel production has been an important part of a global effort to replace fossil fuels with renewable energy sources. However, one of the problems facing biodiesel production is increased production of glycerol as a by-product. Glycerol, or crude glycerol (CG), is generally produced in significant quantities and needs to be managed wisely. This article discusses the potential use of glycerol from biodiesel production as a raw material for bioethanol production. By optimizing fermentation processes, genetic engineering technology, and purification, glycerol can be converted into bioethanol, one of the more environmentally friendly renewable fuels. The success of the conversion of glycerol to bioethanol is also supported by advances in genetic engineering technology that enable the development of more efficient and productive microorganisms. This creates great opportunities to reduce waste, support resource sustainability, and reduce dependence on fossil fuels through the use of glycerol as a bioethanol raw material. Conversion of glycerol to bioethanol is a step towards more sustainable and environmentally friendly renewable energy.

Metode Menentukan Klor dalam Sludge Oil: Perbandingan Metode Wet dan Metode Jena Rahman, Herliati; Salasa, Akhirudin
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v10i1.5428

Currently, the use of alternative fuels and raw materials (AFR) in the cement industry is very attractive. This is driven by demands for environmental sustainability and the efficiency of fuel and raw material costs. One of the materials that can be used as AFR is sludge oil. However, it needs to be ensured that the chlorine content in the sludge oil does not exceed the threshold so that it does not have a negative impact during the cement production process. It is known that if the chlorine content is more than the threshold, it can cause blocking or clogging of the separator and the kiln. This study aims to determine the performance of the Jena Multi EA 4000 instrument in determining the chlorine content in sludge oil quickly and accurately. Analytic Jena Multi EA 4000 is an Atomic Absorption Spectrometers (AAS) instrument that can be used for analysis of samples in the form of solids or slurries containing chlorine. As validation of the resulting analysis, the wet method is used, which as usual, to determine chlorine levels. From the statistic analysis, namely the F-test and T-test, We found that F-count equal to 0.0080 and F-table equal to 4.2839. it shows that F-count < F-table, indicating the difference in the variance of the two methods H0: s12 = s22 is accepted because there is no difference to the variability of these two tests and the value of T-count = -3.9717 and T-table = 2.1788 so that T-count <T-table is accepted because there is no difference in the average accuracy of the two methods H0: M1 = M2. Â

Ultraviolet Shielding Performance of Coconut Coir as a Filler in Low-Density Polyethylene (LDPE) Plastic Mulch Andreansyah, Ilham; Mentari, Puji Rizana Ayu; Rahman, Herliati; Syamani, Firda Aulya
Wood Research Journal Vol 14, No 1 (2023): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2023.14.1.13-24

Plastic mulch is a layer of material applied to the soil surface to maintain moisture retention in the soil by preventing evaporation, reduce weed growth by blocking sunlight from reaching underlying weeds, and optimize fertilizer use by minimizing nutrient loss to the environment. However, the degradation of low-density polyethylene (LDPE), a thermoplastic commonly used for mulching, into microplastics due to exposure to UV radiation. This research explored the potential of coconut coir, a natural fiber with a high lignin content ranging from 30 to 46%, as a UV protective agent. The objective was to develop biodegradable plastic-based mulch composites that have better resistance to UV exposure by incorporating coir as a filler material in LDPE-based composites. Different ratios of coconut fiber were used (10%, 20%, 30%, and 40%), and Maleic anhydride grafted polyethylene (PE-g-MAH) was used as a binder at 2% of total weight mixed with LDPE in a rheomixer (80 rpm, 120°C for 10 min). The resulting plastic mulch bio-composites were evaluated for thermal, mechanical, UV resistance, and biodegradability properties. The results showed that the higher addition of coconut coir resulted in a decrease in the thermal and mechanical characteristics of the composite. However, the addition of higher coconut coir in the composite at 40% can provide an increase in the composite's resistance to ultraviolet light exposure, and the properties are easily degraded by the environment (biodegradable).

Ultraviolet Shielding Performance of Coconut Coir as a Filler in Low-Density Polyethylene (LDPE) Plastic Mulch Andreansyah, Ilham; Mentari, Puji Rizana Ayu; Rahman, Herliati; Syamani, Firda Aulya
Wood Research Journal Vol 14, No 1 (2023): Wood Research Journal
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51850/wrj.2023.14.1.13-24

Plastic mulch is a layer of material applied to the soil surface to maintain moisture retention in the soil by preventing evaporation, reduce weed growth by blocking sunlight from reaching underlying weeds, and optimize fertilizer use by minimizing nutrient loss to the environment. However, the degradation of low-density polyethylene (LDPE), a thermoplastic commonly used for mulching, into microplastics due to exposure to UV radiation. This research explored the potential of coconut coir, a natural fiber with a high lignin content ranging from 30 to 46%, as a UV protective agent. The objective was to develop biodegradable plastic-based mulch composites that have better resistance to UV exposure by incorporating coir as a filler material in LDPE-based composites. Different ratios of coconut fiber were used (10%, 20%, 30%, and 40%), and Maleic anhydride grafted polyethylene (PE-g-MAH) was used as a binder at 2% of total weight mixed with LDPE in a rheomixer (80 rpm, 120°C for 10 min). The resulting plastic mulch bio-composites were evaluated for thermal, mechanical, UV resistance, and biodegradability properties. The results showed that the higher addition of coconut coir resulted in a decrease in the thermal and mechanical characteristics of the composite. However, the addition of higher coconut coir in the composite at 40% can provide an increase in the composite's resistance to ultraviolet light exposure, and the properties are easily degraded by the environment (biodegradable).

Metode Menentukan Klor dalam Sludge Oil: Perbandingan Metode Wet dan Metode Jena Rahman, Herliati; Salasa, Akhirudin
Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Currently, the use of alternative fuels and raw materials (AFR) in the cement industry is very attractive. This is driven by demands for environmental sustainability and the efficiency of fuel and raw material costs. One of the materials that can be used as AFR is sludge oil. However, it needs to be ensured that the chlorine content in the sludge oil does not exceed the threshold so that it does not have a negative impact during the cement production process. It is known that if the chlorine content is more than the threshold, it can cause blocking or clogging of the separator and the kiln. This study aims to determine the performance of the Jena Multi EA 4000 instrument in determining the chlorine content in sludge oil quickly and accurately. Analytic Jena Multi EA 4000 is an Atomic Absorption Spectrometers (AAS) instrument that can be used for analysis of samples in the form of solids or slurries containing chlorine. As validation of the resulting analysis, the wet method is used, which as usual, to determine chlorine levels. From the statistic analysis, namely the F-test and T-test, We found that F-count equal to 0.0080 and F-table equal to 4.2839. it shows that F-count < F-table, indicating the difference in the variance of the two methods H0: s12 = s22 is accepted because there is no difference to the variability of these two tests and the value of T-count = -3.9717 and T-table = 2.1788 so that T-count <T-table is accepted because there is no difference in the average accuracy of the two methods H0: M1 = M2. Â

Pemberdayaan Kelompok Pendawa Tani Melalui Pelatihan Penjadwalan Waktu Tanam Tanaman Hidroponik di Kampung Carang Pulang Dramaga Ningrum, Sari Sekar; Widanti, Nurdina; Lestari, Sri Wiji; Zulaika, Aidha; Handini, Wike; Herliati, Herliati; Widyawati, Yeti; Sonjaya, Abeth Novria
Jurnal Pengabdian Masyarakat Bangsa Vol. 2 No. 5 (2024): Juli
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v2i5.1036

Kegiatan Pengabdian Kepada Masyarakat dilakukan untuk memberikan peningkatan pengetahuan pada Kelompok Pendawa Tani di Carang Pulang, Cikarawang, Dramaga, Bogor mengenai penjadwalan masa tanam tanaman hidroponik untuk meningkatkan hasil panen. Kegiatan ini dilakukan dengan pelatihan, praktik, dan pemberian paket pendukung hidroponik. Dari kegiatan Pengabdian Kepada Masyarakat ini diperoleh hasil panen yang meningkat yaitu dari yang awalnya 25 kg menjadi 40 kg.

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