Analisis Proksimat, Sulfur, Dan Nilai Kalor Dalam Penentuan Kualitas Batubara Di Desa Pattappa Kecamatan Pujananting Kabupaten Barru Provinsi Sulawesi Selatan

Malaidji, Erwin Malaidji Erwin; Anshariah, Anshariah; Budiman, Agus Ardianto

doi:10.33536/jg.v6i3.244

Cited by 8 publications

(7 citation statements)

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“…Burning electronic waste using coal. The energy produced from coal is 24.8 MJ/kg of Energy (Malaidji, Anshariah & Budiman, 2018), so to produce 6960 MJ of energy, it takes 320.968 kg of coal for 61.63 USD/ton per October 2021 (Kementarian Energi dan Sumber Daya Mineral, n.d.). The price of nitric acid per 37,000 gr is 490,000 IDR (Tokopedia (n.d.a).…”

Section: Informal Recycling Centermentioning

confidence: 99%

Economic and environmental benefits of e-waste management networks design in Yogyakarta province, Indonesia

Sari,

Masruroh,

Asih

2024

JIEM

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Purpose: Electronic devices consumption, especially smartphones for communication, have increased significantly, causing the potential for electronic waste to increase too. However, the high potential of this flow has not been matched by good waste management. This study aims to develop a management network for e-waste that collaborates formal and informal channels to provide optimal supply chain benefits in terms of economic and environmental aspectsDesign/methodology/approach: This research designs an e-waste management network followed by building a single-objective mathematical model that considers economic and environmental aspects. This model was solved using Mixed Integer Linear Programming.Findings: The supply chain will benefit from the proposed management network by collaborating formal and informal channels. With an incentive of 10,000 IDR, it is hoped that it will be able to invite consumers and informal collectors to collect waste informal channels. The total profit from managing electronic waste supply every month from Yogyakarta Province is 5.529 x 1010 IDR with the composition, consumers 81.2%, informal 13.3% channel obtained from informal collectors and repairing centers and 2.1% for formal channels, and there is an intangible profit of 3.4%. The formal channel provides more significant benefits than the informal, but requires a significant investment. This formal channel feasible if at least 33% of the total supply goes to this channel.Research limitations/implications: The model designed is deterministic. Therefore, it can be developed into a probabilistic model for further research to represent more real cases in the field.Practical implications: Regulation is the factor that most influences consumers' intentions and behavior to participate in e-waste management programs. It will be able to change consumer behavior by forcing consumers to participate in e-waste collection programs. Therefore, a government regulation is needed that organizes and supervises the implementation of the proposed management model.Social implications: Currently, the practice developing in the community is that the informal sector carries out smartphone waste management, therefore in the designs made, informal actors are still given space in waste management for the repair process and the secondhand market. Meanwhile, further processing, such as recycling, must be carried out through formal channels taking into account the environmental impact.Originality/value: Few studies have developed an electronic waste management model by collaborating informal and formal channels that consider economic and environmental aspects, and its implementation is organized and supervised by government regulations.

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Section: Informal Recycling Centermentioning

confidence: 99%

Economic and environmental benefits of e-waste management networks design in Yogyakarta province, Indonesia

Sari,

Masruroh,

Asih

2024

JIEM

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“…1,630.81. Burning electronic waste using coal, the energy produced from coal is Energy 24.8 MJ/kg [69]. So to produce energy as much as 6960 MJ, it takes 320,968 kg of coal at US$ 61.63/ton per October 2021 [70].…”

Section: Environmental Efficiency Indexmentioning

confidence: 99%

Eco-Efficiency Comparative Analysis of Informal and Formal Smartphone Recycling Practices Using Life Cycle Assessment

Sari¹,

Masruroh²,

Asih³

2023

Int. J. Adv. Sci. Eng. Inf. Technol.

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Due to a lack of environmental protection awareness and knowledge, many practices informally recycle smartphone waste to get precious metals. Smartphones are hazardous and toxic waste materials, so they require proper handling not to cause problems for the environment. This study aims to measure the environmental impact and eco-efficiency level of formal recycling practices carried out by licensed companies and compare them with informal recycling practices carried out by the community. Environmental impact measurement uses Life Cycle Assessment with the eco-cost method. The measurement results show informal recycling practices have a higher environmental impact than formal recycling practices. Informal recycling practices harm almost every category, while formal recycling has a significant positive impact on the acidification and metal scarcity categories. Based on the value of the eco-efficiency index, formal recycling practices are affordable and sustainable and have an eco-efficiency level of 100%. Economically, formal recycling provides higher financial benefits than informal recycling. Thus, formal recycling practices are better and more profitable than informal recycling practices from the economic and environmental aspects. So, it is time for Indonesia to switch to a formal recycling process carried out by licensed companies considering the vast potential for waste as a raw material. The government's role is to invite the public to distribute smartphone waste to licensed recycling companies.

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“…received). Total moisture umumnya dianalisis dalam dua tahap sehingga pengujiannya disebut two-stage determination.Pengujian nilai total moisture dapat menggunakan metode gravimetri (Malaidji et al 2018). Prinsip dari pengujian total moisture secara gravimetri yaitu pengukuran berdasarkan perbedaan massa sebelum dan setelah dilakukan pemanasan.…”

Section: Hubungan Nilai Total Moisture Dan Gross Calorivic Valueunclassified

ANALISA PENGARUH NILAI TOTAL MOISTURE TERHADAP GROSS CALORIVIC VALUE PADA BATUBARA JENIS X DI PT BUKIT ASAM Tbk UNIT PELABUHAN TARAHAN

Kusniawati

Pratiwi

Yonika

2023

JIRK

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Penelitan ini bertujuan untuk mengetahui pengaruh nilai total moisture terhadap gross calorivic value pada batubara jenis X yang berasal dari PT Bukit Asam Unit Pelabuhan Tarahan. Kualitas suatu batubara dapat ditentukan dengan cara analisa secara fisik maupun kimia. Umumnya untuk menentukan kualitas batubara dilakukan analisa kimia pada batubara yang diantaranya berupa analisis proksimat dan analisis ultimat. Metode yang digunakan untuk menentukan total moisture yaitu dengan metode gravimetri dan penentuan nilai kalori dengan menggunakan alat bomb calorimeter dengan prinsip kerja asaz black. Hasil nilai total moisture yang didapat 17,53%, 20,79%, 17,92%, 21,07%, 10,73%, 19,43%, 20,07%, 21,76%, 22,79%, 32,12%. Dan nilai gross calorivic value basis adb yaitu 6836 cal/g, 6511 cal/g, 6738 cal/g, 6456 cal/g, 7075 cal/g, 6706 cal/g, 6685 cal/g, 6688 cal/g, 6535 cal/g, 6484 cal/g. Hasil total moisture yang diuji didapatkan berada pada rentang 10.43% - 32.12%, dengan rata - rata 20.42%. Nilai gross calorific value (GCV) didapatkan berada pada rentang 6456 – 7075 kal/g yang di mana kalori pada rentang tersebut masuk ke dalam klasifikasi bituminous. Hasil total moisture tersebut disimpulkan berada di atas standar yang diterapkan perusahaan yaitu sebesar 11%. Hubungan antara Total Moisture dan Gross Calorivic Value berbanding terbalik. Karena semakin tinggi Moisture pada suatu batubara maka nilai kalori yang dihasilkan akan rendah.

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Analisis Proksimat, Sulfur, Dan Nilai Kalor Dalam Penentuan Kualitas Batubara Di Desa Pattappa Kecamatan Pujananting Kabupaten Barru Provinsi Sulawesi Selatan

Cited by 8 publications

References 0 publications

Economic and environmental benefits of e-waste management networks design in Yogyakarta province, Indonesia

Economic and environmental benefits of e-waste management networks design in Yogyakarta province, Indonesia

Eco-Efficiency Comparative Analysis of Informal and Formal Smartphone Recycling Practices Using Life Cycle Assessment

ANALISA PENGARUH NILAI TOTAL MOISTURE TERHADAP GROSS CALORIVIC VALUE PADA BATUBARA JENIS X DI PT BUKIT ASAM Tbk UNIT PELABUHAN TARAHAN

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