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All Journal Jurnal Dampak Jurnal Penelitian Pendidikan IPA (JPPIPA)
Lies Setyowati
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Environmental Science Materials Science & Nanotechnology Physics

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Studi Perancangan Dan Pemanfaatan TPS 3R Untuk Sampah TPS (Tempat Pengolahan Sampah Rumah Tangga Dian Kasih; Irvan Indrawan; Lies Setyowati; Munir Tanjung; Isra Suryati
Jurnal Dampak Vol 15, No 1 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.15.1.16-22.2018

Abstract

As the population increases, waste generation and composition will increase. Therefore, there is a need for planned and effective waste handling so that the problem of waste can be resolved in accordance with the 3R (Reuse, Reduce, and Recycle) concept. The aim of this research is to calculate the amount of waste generation and the composition of domestic waste produced by the residents of Medan Denai, and also devise the type of 3R Waste Treatment Plant for the District of Medan Denai. The method for measuring the generation and composition of waste are based on SNI 19-3964-1994, that is based on income level. Meanwhile, the typical planning of TPS 3R is obtained from the calculation of waste generation which is associated with the projection of population. The result showed that the average of household waste in the District of Medan Denai was 0.265 kg/person/day or 1.4 l/person/day. The composition of household waste generation in the District of Medan Denai is dominated by food waste 65.38 %. It is estimated that in 2026, the waste generation produced in the District of Medan Denai would reach about 41,593.7 kg/day. The economic potential that can be generated by using 3R concept is estimated reaching about Rp11,687,190 - Rp85,370,971 per day. Managing waste with 3R concept require a TPS with 1,488.24 m2 of area to process the household waste, with the estimated cost required to build the facility is Rp598,960,540 and the operational cost is Rp104,000,000 per month.
Analisis Sebaran Total Suspended Particulate (TSP) Dengan Model Gaussian Point Source Di Pembangkit Listrik Berbahan Bakar Biomassa Shindy Zellia; Ivan Indrawan; Lies Setyowati; Muhammad Faisal; Isra' Suryati
Jurnal Dampak Vol 15, No 2 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.15.2.82-87.2018

Abstract

The study aims to analyze the concentration of TSP generated from the smokestacks of biomass fuelled power plant with 2 x 15 MW  capacity along with the pattern of distribution in the ambient air around the plant. The field observation conducted in Jl. K. L. Yos Sudarso KM 10.5 by making five (5) ambient air sample point, the point I is located around 130 m south, the point II within 220 m south, point III around 110 m east, point IV around 325 m north and point V around 100 m west from sources emissions. The sample is taken for 3 (three) days, i.e in the morning, afternoon and evening. Maximum TSP concentration was measured at point III at 50,93 μg/m3. Meanwhile, according to Gaussian Point Source model, the maximum TSP concentration at point I is around 1,79 μg/m3. The concentration of TSP is still below the ambient air quality standard. Furthermore, the measured TSP concentration and TSP modeling were mapped with the Surfer program version 11.0. Based on the results, the measured TSP concentration mapping indicates that the highest affected area is located at the eastern region of the emission source. Moreover, Mapping of TSP concentration models show that the highest affected area is located at the southern part of the emission source.
Pengaruh Kecepatan Angin, Kelembapan dan Suhu Udara terhadap konsentrasi SO2 Ambien dan Pemetaan SO2 Amben di Sekitar PT. Kawasan Industri Medan Chandra Iramawati; Muhammad Turmuzi; Isra' Suryati; Lies Setyowati; Eka Lestari Mahyuni
Jurnal Dampak Vol 15, No 2 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/dampak.15.2.72-76.2018

Abstract

This study aims to determine the effect of wind speed, humidity and air temperature on the concentration of SO2 in ambient air around PT. Medan Industrial Area (KIM) and to find out the description of SO2 concentration mapping around KIM. This study was limited to KIM Phase I and II and sampling was carried out at 6 (six) points. The results obtained were the lowest SO2 concentration of 58.63 µg / m3 and the highest concentration was 112.91 µg / m3. Based on the linear regression test, the result is that the higher the wind speed, the concentration of SO2 in the area around KIM is lower and 15.1% SO2 concentration is influenced by wind speed. The higher the humidity of the air, the concentration of SO2 in the area around KIM is lower and 26% of the concentration of SO2 is influenced by humidity. The higher the air temperature, the higher the concentration of SO2 in the area around the KIM and 68.5% the concentration of SO2 is influenced by air temperature. Based on the results of mapping using the Surfer 11 version, the results obtained in the morning the highest SO2 concentration was in the southern part of KIM and the lowest SO2 concentration was in the northwestern part of KIM. During the day, the highest SO2 concentration was in the eastern part of the KIM and the lowest SO2 concentration was in the northwestern part of KIM.
Optimizing Sustainable Wastewater Treatment: Kinetic and Parametric Study of Methylene Blue Removal Using Electrocoagulation Amir Husin; Dermala Tito A; Fadhila Fadhila; Lies Setyowati; Deny Supriharti
Jurnal Penelitian Pendidikan IPA Vol 12 No 6 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i6.15127

Abstract

This study investigates the removal of Methylene Blue (MB) from synthetic wastewater using a batch electrocoagulation (EC) reactor with two pairs of parallel monopolar iron electrodes, directly supporting Sustainable Development Goal 6 (Clean Water and Sanitation). Operational parameters, including initial pH, inter-electrode distance, applied voltage, and electrolysis time, were systematically evaluated. Within 15 minutes of electrolysis, a color removal efficiency of over 80% was achieved at an applied voltage of 10 V and an inter-electrode distance of 5 mm. Treatment efficiency decreased to 60.13% when the inter-electrode distance was widened to 10 mm due to increased cell resistance. Conversely, increasing the voltage from 10 V to 20 V and 30 V significantly enhanced the process efficiency. The MB removal rate was validated using a mass transfer-based kinetic model solved via the 4th-order Runge-Kutta method. The model aligned well with experimental data, displaying a Sum of Squared Errors (SSE) range of 0.09 to 193.57. At an extended electrolysis time of 75 minutes, the average efficiency reached 92.04% across all voltage variations, proving that coagulant saturation overcomes mass transfer limitations.
Co-Authors Amir Husin Chandra Iramawati Deny Supriharti Dermala Tito A Dian Kasih Eka Lestari Mahyuni Fadhila Fadhila Indrawan, Ivan Irvan Indrawan Isra Suryati Muhammad Faisal Muhammad Turmuzi Munir Tanjung Shindy Zellia