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Proceedings Series on Physical & Formal Sciences
Published by Universitas Muhammadiyah Purwokerto
ISSN : -     EISSN : 28087046     DOI : https://doi.org/10.30595/pspfs.v2i.164
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering
The Proceedings Series on Physical & Formal Sciences aims to publish proceedings from conferences on the scope: 1. Chemistry 2. Computer Science & Artificial Intelligence 3. Engineering & Energy 4. Materials Science 5. Physics & Astronomy 6. Agricultural & Biological Sciences
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 282 Documents
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Pengaruh Limbah Industri Tahu Terhadap Kualitas Air Sungai Berdasarkan Parameter Biochemical Oxygen Demand, Chemical Oxygen Demand, Total Suspended Solid (Studi Kasus Industri Tahu di Dusun Janten, Ngestiharjo, Kasihan, Bantul) Sardono, Dimas Ari; Sutrisno, Widarto; Sulistyorini, Dewi; Anwar, Aristu; Anggraini, Rizki Budi
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.846

Abstract

This research aims to evaluate the influence of wastewater treatment plant (WWTP) outlets on the water quality of the Kalibayem River in the Dusun Janten, Ngestiharjo, Kasihan, Bantul area. The research method employed involved collecting river water samples from points before and after the WWTP outlets, as well as analyzing water quality parameters such as BOD, COD, and TSS. The research findings indicate that the WWTP outlets have a significant impact on the water quality of the Kalibayem River. After undergoing treatment processes at the WWTP, there was a reduction of 0.85% in BOD, 1.28% in COD, and 62% in TSS levels in the river water. Thus, the results of this study demonstrate that the WWTP outlets of the tofu industry do not have a significant impact on pollution in the Kalibayem River in the Dusun Janten, Ngestiharjo, Kasihan, Bantul area. This means that the WWTP has been successful in reducing pollution loads and maintaining the water quality of the river. The implications of this research can be used as a reference for managing and controlling industrial waste and preserving the sustainability of the river ecosystem in that area.
Analisis Faktor-Faktor Kerentanan Banjir Pesisir (Studi pada Pesisir Pantai Utara Jawa Tengah) Salim, M. Afif; Wahyudi, S. Imam; Wibowo, Kartono
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.847

Abstract

Flooding is a natural phenomenon that occurs in Indonesia, including the coastal areas of Pantura) which are complicated problems for the government that have not been fully handled properly. Pantura coastal flooding occurs due to rainwater flooding and tidal flooding, causing vulnerability. This study aims to determine the factors that cause vulnerability and determine the adaptation strategy for Pantura coastal flooding. This type of research is quantitative research because research is in the form of case studies based on descriptive assessments and the existence of quantitative data based on numbers and research is carried out by observation and data collection using data collection techniques and data analysis with SPSS Version 25.00 with 183 respondents. The research location is the coastal area of Pantura. Primary data collection method with questionnaires, interviews, observations, and documentation,. Based on the results of the study, the factors of coastal flood vulnerability are classified into physical vulnerability of buildings and infrastructure, biophysical and hydrological vulnerability, vulnerability of community capability and safety and flood vulnerability. The validity test of the vulnerability of coastal flooding shows all valid and reliable indicators because it has a validity value of > 0.300 and the reliability test value of the cronbrach alpha research instrument is above 0.700.
Efektivitas Instalasi Pengolahan Air Limbah Berdasarkan Parameter COD, BOD, TSS, pH (Studi Kasus Industri Tahu di Dusun Janten Ngestiharjo Kasihan Bantul) Setiadji, Wawan; Effendi, Novan Rico; Sutrisno, Widarto; Mashadi, Ahmad; Galuh, Dimas Langga Chandra
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.848

Abstract

The liquid waste generated from tofu production process contains high Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Total Suspended Solid (TSS) as well as low pH levels or acidity. Therefore, the tofu waste needs to be treated before being discharged into the environment to prevent negative impacts on the surrounding environment. Thus, this study aimed to test the effectiveness of the tofu wastewater treatment plant by monitoring the parameters of COD, BOD, TSS and pH using the closed reflux titrimetry, gravimetri and pH meter methods. The sampling was carried out with triple sampling (triplo) at each testing point, which were the equalization tank, anaerobic baffle reactor tank, anaerobic filter tank, and final settling tank. The sample testing was conducted at the "Balai Laboratorium Kesehatan dan Kalibrasi Yogyakarta". The results of the testing were used to determine the reduction in COD and the increase in pH between the wastewater treatment plant tanks, and then the effluent of the wastewater treatment plant was compared with the wastewater quality standards. The results of this study indicate that the average reduction of COD in the effluent is 94%, BOD is 93%, and TSS is 87%. Based on these findings, it can be concluded that the effluent from the wastewater treatment plant is not yet effective in meeting the wastewater quality standards. However, it is worth noting that the pH parameter meets the wastewater quality standards, with an increase of +1.38 compared to the influent pH level. Therefore, in terms of this parameter, the wastewater treatment plant can be considered effective in raising the pH.
Pengaruh Lamanya Perendaman Terhadap Absorpsi, Ketahanan Aus, dan Kuat Tekan Paving Block Wajdi, Bina Arumbinang; Mudiyono, Rachmat; Soedarsono, Soedarsono
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.849

Abstract

Paving blocks are considered advantageous over other road surfaces, and it is undeniable that paving blocks are an alternative road surface whose quality is still affected by water flooding. The objective of this study was to determine the effects of soaking time and age of paving blocks in terms of absorption, wear resistance, and compressive strength. The paving blocks used were manual (Holland) brick models obtained from Banyubiru and mechanical ones obtained from PT Pohon Cemara Semarang. The variations soaking times were 0, 12, 24, 36, 48 (hours) for 7, 14, 21, 28 (days) old pavers. The tests conducted were absorption, wear resistance, and compressive strength tests of paving blocks, carried out in the UNISSULA civil engineering laboratory. The results of absorption tests manual and machine paving block showed that value of the absorption test increased with increasing soaking time. The results of wear resistance of manual and machine pavers show that the untreated samples had a lower wear value and all test results met the requirements of SNI 03-0361-1996 Quality A. The maximum compressive strength of manual paving blocks at 28 days of age without treatment is 13.334 MPa. The maximum compressive strength of machine-made pavers is 25.297 MPa for paving blocks without immersion.
Analisis Pengaruh Penambahan Belerang Terhadap Kuat Geser Tanah Farhan, Erham Muhammad; Azizi, Amris; Afriandiny, Besty
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.850

Abstract

Stable soil is needed in a construction development. There are many ways and materials that can be used to improve soil properties that are less stable. Sulfur as one of the natural products in Indonesia has not been used optimally in the field of civil engineering, especially geotechnical engineering. Therefore, in-depth research is needed regarding the benefits of this sulfur in the world of civil engineering. The purpose of this study was to find out how the effect of mixing sulfur on the shear strength of the soil in the direct shear strength test and to find out at what ratio the sulfur mixture produced the greatest soil shear strength. This research was conducted on chemically stabilized soil samples in the form of addition of sulfur with various mixture variations. The results showed that the addition of sulfur at the percentage of 2%, 3% and 5% increased the cohesion value of the soil compared to the original soil. The addition of sulfur with a percentage of 6% and 7% decreases the soil cohesion value. The greatest increase in soil cohesion occurred in the 2% mixture with an increase of 86.95%. The percentage of 2% increases the value of the largest soil shear strength which is equal to 52.953 kPa from the original soil shear strength value of 48.716 kPa.
Evaluasi Kinerja Biaya dan Waktu Proyek Konstruksi Jalan dan Jembatan Kawasan Industri Terpadu (KIT) Batang dengan Metode Earned Value Hudoyo, Citra Pradipta; Rustendi, Iwan; Sismiani, Ary; Sunarwono, Bambang Eko
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.851

Abstract

Dalam proyek pembangunan jalan dan jembatan, aspek biaya dan waktu adalah variabel yang sangat penting dan tidak dapat dihiraukan. Namun, seringkali proyek jalan dan jembatan mengalami kendala dalam hal biaya dan waktu yang melampaui batas yang diharapkan. Oleh karena itu, analisis terhadap kinerja biaya dan waktu sangat diperlukan. Tujuan dari penelitian ini adalah untuk mengukur kinerja biaya dan waktu proyek jalan dan jembatan di Kawasan Industri Terpadu (KIT) Batang dengan mengaplikasikan metode Earned Value. Hasil penelitian menunjukkan bahwa pelaksanaan pekerjaan cukup baik, hal ini ditunjukan dengan pelaksanaan kegiatan pekerjaan mengalami peningkatan yang cukup tinggi. Namun pada proyek ini memiliki sedikit penyimpangan mendekati akhir pelaksanaan proyek yaitu pada minggu ke-20 dan minggu ke-25, penyimpangan tersebut dapat dikendalikan dan pelaksanaan pekerjaan dapat selesai sesuai dengan jadwal yang direncanakan. Masalah yang ditemui dalam proyek ini adalah keterlambatan proyek yang dapat dipengaruhi oleh beberapa faktor seperti cuaca alam, dampak dari pandemik Covid-19 dan masalah peralatan. Solusi yang dilakukan untuk mengejar keterlambatan adalah dengan memberlakukan jam lembur dan menambah tenaga kerja.
Karakterisasi Spektroskopi Raman pada Purifikasi Mixed Hydroxide Precipitate dari Baterai Lithium Bekas Sedyatama, Deska Anggrait; Perdana, Indra; Sutijan, Sutijan
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.852

Abstract

Electrical energy storage batteries are a form of this supporting technology. Lithium batteries are considered the most suitable battery technology for many types of electronic devices today. Waste of used batteries will also increase as LIB production increases. The recycling process is one way to dispose of used batteries because they contain high levels of heavy metals, which pose a significant risk. The most common treatment method for battery recycling is hydrometallurgy. The most important of the various hydrometallurgical steps is the leaching process. The mixed hydroxide precipitate (MHP) will be the product of the precipitation on the NMC metal. Na2SO4 is always an impurity present in MHP products. Therefore, the MHP still needs to be purified to achieve the highest possible purity so that it can be used as a cathode in battery manufacturing. Raman’s spectroscopic was used to analyze the characteristic of MHP purification with variation 30, 50, 70 and 90 oC.
Produksi Coconut Vinegar dari Limbah Air Kelapa dengan Model Fermentasi Cair Termodifikasi Sel Yeast Terimobilisasi Kalsium Alginat Afifah, Dini Nur; Mulyadi, Abdul Haris; Fadhila, Hana Syifa; Hasanah, Yeti R.; Savitri, Puput Wahyu Nita
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.853

Abstract

Coconut (Cocos Nucifera L) is one of the Indonesia’s plantations comodities. Unfortunately, the abundance of raw materials has not had a significant impact on the export market for coconut products, especially functional food products. Based on that issue, research with the aim to produce diversified product of coconut was conducted. The product developed in this research was coconut vinegar produced by fermentation process of coconut waste water via liquid fermentation pathway. To increase efficiency and reduce production costs, the fermentation process was carried out simultaneously. In order to increase the yeast resistance to acetic acid produced by acetic acid bacteria (BAA), the process modification was conducted by using yeast immobilized formed by the calcium alginate matrix. The research results show that the optimum BAA inoculation time was 24 hours after the bead yeast inoculation. The maximum bead yeast mass obtained in this study was 25% m/v. Fermentation that was carried out with the maximum time and bead mass was able to produce coconut vinegar with an acetic acid content of 5.1 g/L, an alcohol conversion of 22.73%. This work is licensed under a Creative Commons Attribution 4.0 International License
Penyisihan COD dan TSS pada Limbah Cair Industri Tahu dengan Kombinasi Metode Elektrokoagulasi dan Filtrasi Menggunakan Media Biji Asam Jawa (Tamarindus indica L) Damajanti, Neni; Ubaidillah, Saad
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.854

Abstract

This study aimed to treat tofu wastewater using electrocoagulation and filtration methods with tamarind seed media. This study was conducted on a lab scale with a capacity of 2 liters, using Al-Al electrodes with a voltage of 13 volts. The variables studied were EC time (20, 30, 40, 50, and 60 minutes) and electrode plate area (90 cm2 and 99 cm2) with a thickness of 1 mm. The parameters measured were COD and TSS of tofu wastewater before and after treatment. The results showed that the electrocoagulation and filtration methods with tamarind seed media could reduce the COD and TSS levels of tofu wastewater significantly. The optimal condition was achieved at EC time of 50 minutes and plate area of 99 cm2, with COD removal of 78.7% and TSS removal of 88%. This was due to the production of metal ions (Al3+) as destabilizing agents at the anode, the formation of flocs by protein and tannin in tamarind seeds, and the pH reduction by ascorbic acid and citric acid in tamarind seeds. This method had the advantage of not using synthetic chemicals and producing a more environmentally friendly final product.
Aplikasi Matriks Leslie untuk Memproyeksi Jumlah Penduduk Perempuan dan Laju Pertumbuhan Penduduk di Kabupaten Banyumas Tahun 2027 Pratiwi, Yuliyanti Dian; Hidayati, Nurul; Mariska, Melli; Sagita, Sarlita Indah; Gusaynsan, Axioma Elmonura
Proceedings Series on Physical & Formal Sciences Vol. 6 (2023): Prosiding Seminar Nasional Teknik (SENATEK) 2023
Publisher : UM Purwokerto Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/pspfs.v6i.855

Abstract

BPS knows the population and the rate of population growth, namely using a population census that is carried out once every 10 years, because this timeframe is the right time to see the birth rate and death rate for an area. So it takes a long time to know the amount of population growth and population growth rate. Based on BPS data for Banyumas Regency for 2021, the population is 1,789,630 people, the population growth rate is 95%. And in 2022 the population will be 1,806,013 people, the population growth rate is 93%. So for 1 year from 2021 to 2022 there will be an increase of 16,383 people, based on data from BPS the number of Banyumas districts has increased. The Leslie Matrix is ??one of the mathematical tools used to model the growth and changes in populations of living things, so that it can assist BPS in predicting population numbers and population growth rates at a time. From Leslie's matrix calculations, the prediction for the female population in Banyumas Regency in 2027 is 985,304 people. And the result of calculating the dominant eigenvalue is ?=1.23 which shows that population growth is increasing.

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