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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Merdeka Indonesia Jurnal International
Yustika Kusumawardani
Universitas Pandanaran
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Medicine & Pharmacology Social Sciences

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PENGARUH WAKTU TINGGAL TERHADAP EFEKTIFITAS SISTEM FILTRASI PENCUCIAN KENDARAAN BERMOTOR MENGGUNAKAN MEDIA FILTER BATANG PISANG Sri Subekti; Yustika Kusumawardani; Denny Wira Pratama
urn:nbn:de:00001miji.v1i11
Publisher : Merdeka Indonesia Journal International

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.986 KB)

Abstract

Laju transportasi sangat diperlukan untuk melakukan suatu kegiatan, hal ini menyebabkan peningkatan penggunaan kendaraan bermotor. Adanya peningkatan kendaraan bermotor tersebut diikuti pula dengan banyaknya jasa pencucian kendaraan bermotor. Larian dari air limbah kendaran bermotor langsung di buang ke saluran drainase tanpa melalui proses pengolahan terlebih dahulu, sehingga dapat mencemari badan air dan lingkungan, Tujuan dari penelitian ini adalah untuk mengetahui pengaruh waktu tinggal terhadap efektifitas dengan sistem filtrasi menggunakan media filter batang pisang. Penelitian ini menggunakan air buangan dari cucian kendaraan bermotor dan batang pisang tebal 50 cm sebagai filtrasi dengan perlakuan perendaman selama tiga hari. Dengan sampling tersebut dipakai untuk menganalis terhadap pH, TDS, suhu. Hasil uji menunjukan bahwa batang pisang dapat mengolah air limbah cucian kendaraan bermotor. Hasil waktu tinggal pH di waktu kontinyu yaitu 7,26 dengan penurunan 31%, waktu tinggal TDS menunjukan 35 Mg/L waktu tinggal pada suhu yaitu 27,2°C.
Synthesis and Characterization of Biodiesel from Tofu Dregs Oil through Esterification and Transesterification Irradiated by Microwave Niyar Candra Agustin; Ricka Prasdiantika; Yustika Kusumawardani
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (472.363 KB) | DOI: 10.14710/presipitasi.v18i1.28-36

Abstract

Biodiesel has become an alternative energy source that continues to be developed. In this research, biodiesel synthesis from tofu dregs oil has been carried out through two stages of the reaction, namely the esterification stage using H2SO4 catalyst to reduce the content of FFA (Free Fatty Acid) and the transesterification stage using KOH catalyst to produce biodiesel. The esterification reaction using 2% H2SO4 catalyst was carried out by microwave heating at power variation of the microwave power 150, 300, 450, 600, 800 Watt with a reaction time of 10 minutes. The transesterification reaction was carried out with variations in microwave power of 150, 300, 450, 600, 800 watts and variations of the reaction time of 5, 10,15,20, and 25 minutes. Biodiesel products were characterized using Gas Chromatography-Mass Spectroscopy (GC-MS), Hydrogen-1 Nuclear Magnetic Resonance (1H-NMR) spectrometer, and feasibility test with the American Standard for Testing Material (ASTM). The characterization results showed that tofu dregs oil biodiesel has been successfully synthesized. The optimum biodiesel was achieved at 600 Watt microwave power with a reaction time of 20 minutes at 92%. The formation of biodiesel is evidenced by several methyl ester peaks, namely methyl oleate (59.98%), methyl linolenic (28.13%), methyl palmitate (8.54%), and methyl stearate (2.32%). Based on the results of ASTM biodiesel tofu dregs oil has met SNI-04-7182-2006 standards, namely the specific density parameter 60/60 ° F (0.87 g/cm3), kinematic viscosity at 40 ° C (4.3 mm2/s), pour point (8 °C), flash point (202 °C) and cloud point (7 )° C for biodiesel.
The Effectiveness of Reducing COD, TSS, and Detergent using Banana Stem Filter Media in the Wastewater Treatment of Motor Vehicles Waste Treatment Yustika Kusumawardani; Soehartono Soehartono; Sri Subekti
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 18, No 1 (2021): March 2021
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (735.395 KB) | DOI: 10.14710/presipitasi.v18i1.37-44

Abstract

The development of the area around the river continues to increase in line with the pace of development to improve community welfare. Likewise, with small-scale motorized vehicle washing businesses that are widely located on the riverbank, if there is no processing, there is a concern that it will also pollute the river. One of the requirements for an effective wastewater treatment plant is minimal maintenance and costs and safe and easy operation. The cellulose content and hygroscopic ability of banana stems make banana stems usable as a porous medium. Based on previous research, banana stem filter media can reduce TSS concentration and detergent for motorized vehicle washing wastewater. This research uses descriptive quantitative research methods. The test variables were the concentrations of COD, TSS, and detergent. This study aims to design WWTP using banana stem filters and to determine the effectiveness of WWTP in reducing the test parameters. The analysis results show that the WWTP of banana stem filter media can be used to treat motorized vehicle washing wastewater with an average value of the effectiveness of reducing the overall test parameters by 51%. The percentage of the best reduction effectiveness was 77% in the TSS parameter on day 4. The average reduction effectiveness of each COD parameter was 48%, TSS 55%, and detergent was 51%.
Co-Authors Agustin, Niyar Candra Denny Wira Pratama Ricka Prasdiantika Soehartono Soehartono Subekti, Sri