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Perencanaan Proses Pengolahan Sampah Plastik dan Kebun di Kabupaten Boyolali dengan Prinsip Karbonisasi Menjadi Energi Mayang Ananda Rini; Novica Ayu Sari; Whindy Ndaru Oktaviani; Rarastika Nur Ghaida; Mega Mutiara Sari; I Wayan Koko Suryawan
Jurnal Energi Dan Manufaktur Vol 14 No 1 (2021)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2021.v14.i01.p06

Waste management in Boyolali Regency is one of the challenges to achieve the smart city criteria. Garbage in Bolali Regency contains 56.12% plastic composition and 37.13% garden waste. Plastic and garden waste has a calorific value that exceeds 5000 kcal/kg, so it can be used as briquettes. The purpose of this study is to analyze the proper planning and can be carried out in Boyolali Regency by using the carbonization process to produce quality briquettes. The waste processing process consists of the process of sorting plastic waste and garden waste, then counting, then carbonization is carried out, so that briquettes are obtained according to standards. The total waste treated is about 90 ton/day and 45 ton/day, for plastic waste and garden waste respectively. If this process is applied at least, it can reduce as much as 50.77% of waste generation in Boyolali Regency. The total recovery of waste energy from the carbonization facility can reach 5611384.6 MJ/day. The land requirement from the processing process reaches 117 ² with the layouting process having dimensions of 264 m x 65 m.

Upaya Pengelolaan Abu Hasil Pengolahan Limbah Medis Dengan Stabilisasi/Solidfifikasi (S/S) Di Indonesia: Sebuah Review Andina Ilma Darmawan; Mega Mutiara Sari; I Wayan Koko Suryawan
Jurnal Serambi Engineering Vol 7, No 3 (2022): Juli 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i3.4498

The generation of medical waste in Indonesia is increasing with the increase in health services to the community. Medical waste in Indonesia must be processed so as not to pollute the environment. One of the efforts made by medical waste producers is the thermal process in the form of incineration. This paper examines efforts to manage medical waste by incineration, especially the ash produced. The ash produced is very dependent on the efficiency of combustion where the results of combustion by the incinerator can be in the range of 78.23 – 99.99%. While the operating temperature of the incinerator at 800-1600ºC. The characterization of incineration ash focuses more on TCLP (Toxicity Characteristic Leaching Procedure), especially heavy metals. Heavy metals in the ash showed that Pb and Zn did not meet the quality standards. Stabilization/Solidification (S/S) is a commonly used method to reduce the hazardous nature of incineration medical ash waste. The S/S process provides a barrier generated at the surface of the effluent to limit the migration of contaminants through mechanical processes or chemical reactions between the ash and cement. The time required for this process is up to 28 days.

PETROLOGI DAN ESTIMASI SUMBER DAYA BATUAN TANAH URUG PADA WILAYAH EKSPLORASI DAERAH TAROKAN, KAB. KEDIRI, JAWA TIMUR Fajar Rizki Widiatmoko; Yazid Fanani; Yohanes Jone; Simela Talaohu; Muhammad Agus Irwanto; I Wayan Koko Suryawan; Mega Mutiara Sari; Ratih Hardini Kusuma Putri
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3160

Kediri Regency is a potential area for mining minerals. One of the rock excavation materials found in Kediri Regency is the type of andesite and backfill. Backfill is a mineral as a result of weathering of the parent rock, which is rich in andesite fragments and silica elements. This research was conducted at the exploration location of Tarokan Village, Tarokan District, Kediri Regency. The study was conducted using petrological analysis to obtain rock types and estimates of the availability of these minerals at the research site. Based on the results of petrological analysis, it shows that the sample is a type of backfill and andesite. However, the presence of all samples was dominated by samples of backfill that were present in abundance in as much as 98 % of the total exploration area. Based on the results of the estimation of backfill resources from geological modeling and volumetric calculations from the triangulation concept at an elevation of 110-72 mdpl, the measured resource of the Sandy Tuff unit (TU) has a volume of 2,514,150 m3, based on the results of the analysis of the average rock density of 2.172 g/cm3, the tonnage of the sandy tuff unit is 5,460,734 tons, with the tonnage of backfill from tuff 4,203,659 tons, and andesite tonnage 1,257,075 tons.

THE EFFECT OF SALINITY ON OXYGEN TRANSFER PROCESS IN LEACHATE WITH A LOW INITIAL COD CONCENTRATION Moh Rizal Ngambah Sagara; Mega Mutiara Sari; Iva Yenis Septiariva; I Wayan Koko Suryawan
Journal of Green Science and Technology Vol 6, No 2 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.6 NO.2 SEPTEMBER 2022
Publisher : FAKULTAS TEKNNIK UNIVERSITAS SWADAYA GUNUNG JATI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i2.6911

Leachate is one of the results of rainwater infiltration and the degradation of microorganisms in waste. Some leachate types usually contain salinity which is an inhibitor in biological treatment processes. Aerobic biological treatment usually also requires sufficient dissolved oxygen (DO) levels. This study aimed to determine the effect of salinity on oxygen transfer in saline leachate. This study used a DO meter to measure the DO concentration in the 2 L volume reactor. There were two variations, namely leachate without salinity and with salinity 6 ppt, where the processing was carried out with three repetitions. The final oxygen transfer coefficients for the leachate without salinity and with salinity were 0.021 and 0.014, respectively. While the detention time required for leachate without salinity is 47.5 minutes, it takes 71.43 minutes with salinity.

Penyusunan Zonasi Kawasan Pertambangan Di Kabupaten Magetan Berdasarkan Aplikasi Sistem Informasi Geografis Dengan Metode Pertampalan Yazid Fanani; Fajar Rizki Widiatmoko; Salahudin Al Fakih; I Wayan Koko Suryawan; Mega Mutiara Sari
PROMINE Vol 9 No 2 (2021): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Sains dan Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/promine.v9i2.2774

Magetan has resources mineral potential of non-metallic minerals and rocks. The mineral variety is a mineral which relates to the people livelihood because it necessary for infrastructure development. There is no mining area zoning until now and it can be used to optimize the management and utilization of potential resources. In Magetan, mining area zoning was carried out by giving weights and assessments to the determining parameters which was conducted by patch method and it utilized Geographic Information System. So, the result of mining area zoning could be grouped into three zones. They were a zone could be granted a mining permit, a zone could be granted a conditional mining permit and a zone could not be granted a mining permit. Determining parameters for mining area zoning were land height, disaster vulnerability, groundwater, river borders, lakes and irrigation buildings, springs, forests and protected areas, agricultural land and cultivation areas, settlements, cultural heritage, tourism and district strategic areas, and land slope. The result of potential resources identification was carried out by analyzing Magetan geological map which was obtained potential resources, like andesite, pumice breccia, sandstone, siltstone and basalt. The zoning of Magetan mining area is a zone could bne granted a mining permit and the area was 9,914.507 Ha or about 14% in a percentage of the area, a zone could be granted a conditional mining permit covering an area of 20,748.29 Ha or about 30% and a zone unable to be granted a mining permit covering an area of 39,296.08 Ha or about 56% of the total area of Magetan.

Possibility of municipal waste management with Refuse-Derived Fuel (RDF) mixed paper and garden in Depok City Eva Nur Fauziah; Mega Mutiara Sari; I Wayan Koko Suryawan
Indonesian Journal of Applied Environmental Studies Vol 4, No 1 (2023): Volume 4 Number 1 April 2023
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/injast.v4i1.7171

Paper and garden waste are among the various types of rubbish commonly encountered in urban areas in Indonesia, including the city of Depok. Notably, not all paper waste can be recycled by garbage collectors into new products. In addition, garden waste is also garbage, one of the wastes produced daily from gardening activities. This study analyzed the potential for reducing paper and garden waste using as Refuse-Derived Fuel or RDF in Depok City. This study analyzes the quality of RDF based on the parameters of water content, ash content, density, and calorific value resulting from the material substitution. The results were analyzed using the multicollinearity and Kepner-Tregoe Decision Analysis (KTDA). The results of the multicollinearity test showed that the ash and water content could reduce the calorific value of RDF mixed with paper and garden waste. The addition of garden waste composition can increase the calorific value. Based on the results of decision analysis using KTDA, it shows that the variation of the mixture of 75% paper waste and 25% wood waste has the most prominent points compared to other variations. Material Flow Analysis (MFA) utilization of this waste can reduce the generation of paper and garden waste by 3.5% and 12.3%, respectively.Sampah kertas dan kebun adalah beberapa jenis sampah yang biasa ditemukan di perkotaan di Indonesia, termasuk kota Depok. Perlu dicatat, tidak semua sampah kertas dapat didaur ulang oleh pemulung menjadi produk baru. Selain itu, sampah kebun juga merupakan salah satu sampah yang dihasilkan sehari-hari dari kegiatan berkebun. Kajian ini menganalisis potensi pengurangan sampah kertas dan kebun dengan menggunakan Refuse-Derived Fuel atau RDF di Kota Depok. Penelitian ini menganalisis kualitas RDF berdasarkan parameter kadar air, kadar abu, berat jenis, dan nilai kalor hasil substitusi bahan. Hasil penelitian dianalisis menggunakan multikolinearitas dan Analisis Keputusan Kepner-Tregoe (KTDA). Hasil uji multikolinearitas menunjukkan bahwa kadar abu dan air dapat menurunkan nilai kalor RDF yang bercampur dengan kertas dan sampah kebun. Penambahan komposisi sampah kebun dapat meningkatkan nilai kalor. Berdasarkan hasil analisis keputusan menggunakan KTDA menunjukkan bahwa variasi campuran 75% limbah kertas dan 25% limbah kayu memiliki poin paling menonjol dibandingkan variasi lainnya. Pemanfaatan Material Flow Analysis (MFA) limbah ini dapat mengurangi timbulan limbah kertas dan kebun masing-masing sebesar 3,5% dan 12,3%.

Characteristics of Density and Hardness on Caloric Value of Substitution of Biomass and Pet Plastics as Refused Derived Fuel Pellets Pratiwi Claudia Gaina; Mega Mutiara Sari; I Wayan Koko Suryawan; Wisnu Prayogo; Kuntum Khoiro Ummatin; Qurrotin Ayunina Maulida Okta Arifianti; Niswatun Faria
Jurnal Bahan Alam Terbarukan Vol 12, No 1 (2023): June 2023 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v12i1.38069

The utilization of biomass and polyethylene terephthalate (PET) waste as raw material for refuse-derived fuel (RDF) has been studied. However, physical such as density and hardness are still not widely used. This study aimed to determine the relationship between variations in the composition of PET and physical garden waste density and hardness on the quality of the caloric value of RDF. Density measurements were carried out with the Ultrapyc 1200e instrument. While for hardness, using the Shore D method. The Shore D Hardness test is a standardized test that involves evaluating the amount of depth that may be penetrated by a certain indentation. The lowest density is RDF pellets for food waste at 1,537 kg/m3 and consists of RDF pellets for plastic waste at 2,560 kg/m3. In line with the density, the hardness value increases with the addition of the PET composition. The density and hardness values in the RDF mixture show a simultaneous relationship to the heating value. The highest caloric value achieved is the use of 100% PET as pellets which can reach 5765 kcal/kg.

Evaluasi Kehadiran Dan Pemanfaatan Duckweed Pada Sistem Kolam Stabilisasi Pengolahan Air Limbah Domestik Darwin Darwin; Anshah Silmi Afifah; Mega Mutiara Sari; I Wayan Koko Suryawan; Yosef Adicita
Jurnal Ilmiah Lingkungan Kebumian Vol 5, No 1 (2022): September 2022
Publisher : Jurusan Teknik Lingkungan, FTM, Universitas Pembangunan Nasional “Veteran” Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jilk.v5i1.7292

Pengolahan air limbah domestik yang saat ini umum digunakan adalah kolam stabilisasi yang terdiri dari anaerob, fakultatif, dan aerobik. Di dalam prosesnya setelah melalui kolam stabilisasi dapat dapat ditampung melalui reservoir. Dalam proses pengolahan dengan proses kolam stabilisasi kehadiran gulma seperti duckweed dapat memban meningkatkan efisiensi penyisihan nutrient. Tujuand ari studi ini adalah untuk mengevaluasi kehadiran duckweed pada air limbah dan potensi pemanfaatannya di sistem kolam stabilisasi. Studi ini dilakukan dengan cara observasi lapangan dan studi literatur. Sistem kolam stabilisasi terdiri dari 3 sel: sel IA dan sel IB, sel IIA dan IIB, dan sel III. Sel I terdiri dari dua bagian yaitu sel IA dan sel IIB. Duckweed dalam sistem hanya tumbuh di kolam sel IB, sel IIA dan reservoir. Sesuai dengan karakteristiknya, alga memang sudah seharusnya tumbuh di sel IIA. Sel IIA adalah kolam fakultatif, yang memiliki daerah aerobik dan daerah anaerobik. Saat pagi dan sore hari alga tidak muncul ke permukaan dan air terlihat bening. Alga yang muncul di reservoir didominasi oleh alga kelas Chlorophyta karena memiliki warna hijau. Duckweed dapat digunakan sebagai pakan ternak seperti ikan, sapi, domba, kuda dan babi. Selain itu duckweed juga daapat dijadikan sumber energi dengan teknologi termokimia telah banyak digunakan untuk menghasilkan produk bio-minyak, arang dan gas.

THE EFFECT OF SALINITY ON OXYGEN TRANSFER PROCESS IN LEACHATE WITH A LOW INITIAL COD CONCENTRATION Moh Rizal Ngambah Sagara; Mega Mutiara Sari; Iva Yenis Septiariva; I Wayan Koko Suryawan
Journal of Green Science and Technology Vol 6 No 2 (2022): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.6 NO.2 SEPTEMBER 2022
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v6i2.6911

Leachate is one of the results of rainwater infiltration and the degradation of microorganisms in waste. Some leachate types usually contain salinity which is an inhibitor in biological treatment processes. Aerobic biological treatment usually also requires sufficient dissolved oxygen (DO) levels. This study aimed to determine the effect of salinity on oxygen transfer in saline leachate. This study used a DO meter to measure the DO concentration in the 2 L volume reactor. There were two variations, namely leachate without salinity and with salinity 6 ppt, where the processing was carried out with three repetitions. The final oxygen transfer coefficients for the leachate without salinity and with salinity were 0.021 and 0.014, respectively. While the detention time required for leachate without salinity is 47.5 minutes, it takes 71.43 minutes with salinity.

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