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IJEMS (Indonesian Journal of Environmental Management and Sustainability)

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Published by ARTS Publishing

ISSN : 25986260 EISSN : 25986279 DOI : -

Core Subject : Health, Science, Agriculture, Social,

Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Energy Environmental Science Public Health

This journal aimed to be a platform for academics, regulators, practitioners, and also policy makers to share and discuss how to manage their surrounding environment in order to build and develop a sustainable environment. The scope of this journal includes all issues of fundamental environmental science, management, technology and related fields. In particular, the journal welcomes the following field: Waste and wastewater management, Air, soil, and water pollution, Climate change and its aspects, Natural energy and resources, Environmental policy and Risk analysis and assessment of public health.

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Articles 6 Documents

Search results for , issue "Vol. 2 No. 1 (2018): March" : 6 Documents clear

Technical Feseability Study and Economic Development of Limestone at Pelawi Hill by PT. Semen Baturaja (Tbk.) in Ogan Komering Ulu Distric of South Sumatra Subagio Badirun; Didik Susetyo; Restu Juniah
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

Limestone mining for cement is increasing in Indonesia, and has been specifically included in the strategic plan of PT. Semen Baturaja (Persero) Tbk. By expanding the limestone mining in Bukit Pelawi, OganKomering Ulu Regency. From the mine, the Company targets 2,000,000 tons of limestone per year to support the plan to increase cement production to 3.4 million tons per year from 1.5 million tons per year. This study makes a technical and economic assessment of the Company's action plan. Based on detailed exploration drilling conducted, it has identified limestone sources of 80.3 million tons and 43.4 million tons of mining reserves. The quality of limestone composite in the mine by Company’s is CaO> 43% and RCO3> 78%. The value of Cut of Grade (COG) which is still categorized by ore is CaO at 30% and RCO3 is 70%. The results of this study indicate the assumption of the selling value of limestone with composite quality of Rp. 48,500 per ton with a maximum production rate of 2 million tons per year, still provides eligibility criteria for all investment parameters calculated showing IRR 13.72%, NPV (+) Rp 5,111,313,765.-, PBP for 6.42 years. The effect of increasing or decreasing cement price assumption and operational cost ± 1.5%, will give a significant effect on the rate of return on the calculation of this study.

Endophyte microbial characteristic of soft corals Lobophytum sp and Sinularia sp collected from Maspari Island waters, South Sumatera Rozirwan M; Muhammad Hendri; Rezi Apri
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

Soft corals have bioactive compounds to potential as marine natural products, but the over exploitive to destroy of that ecosystem. Therefor endophyte microbial isolation can be effort to prevent that matters. This research aimed to isolate and characteristic on the entophyte microbial of soft coral Lobophytum sp and Sinularia sp that collated from Maspari island waters. Methodology of research were establishing growth of microbial samples (bacterial and fungal), isolation and characterization. Total of bacteria colony of Lobophytum sp were obtained about 5 isolates, and Sinularia sp were about 4 isolates. The macroscopic characteristic showed that whole bacteria had white colors. That colonies had undulate, entire and curl (the edge of colony) and circular and irregular (for colony shape). For fungal of Lobophytum sp were obtained about 3 isolates, while Sinularia sp had only one isolate. The fungal colonies macroscopic characteristic showed yellow, green and white color, while shaped and edges colonies were thickened. spread, thin, round, dark, and the whole of isolates had filamentous hyphae.

Investment estimation and acceptance of State Tax Instead of coal mining business license Clear and Clean in West Sumatra Province Riam Marlina; Fachrurrozie Sjarkowi; Maulana Yusuf
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

This research conceptual measurement simulation for financial component which is needed for investment and benefit simulation held by stated that taken from company obligation categorized as non tax for mining activities predicated with cnc at West Sumatera Province. This simulation connected with capital investment and operational activities that influenced by coal getting stripping ratio, coal hauling and other financial related. This simulation only values stated income non tax and royalty. Analysis methods using from several document feasibiliy study from coal company has already operated, and also estimation for all investment component and components of income stated non tax. Accuracy data accepted for this research at least 30% from all investment. Estimation starting from deciding production target, life mining period, investment needs, financial operation and other financial activities, and comparison with theoritical measurement. The comparison result then used to make another financial model simulation. At the last, this research will present economy simulation model created from mining operational activities in west sumatera province to estimate stated income non tax from mining production operational. Using sensitivity analysis, shows that the change of coal selling prices will gives significant influence to NPV project and stated incomen non tax.

Energy Efficiency and Greenhouse Gas Emissions Reduction Through Electrification Program atTanjungEnim Mine Business Unit of PT Bukit Asam (Persero) Tbk. Iko Gusman; Pramudita Triatmojo; Peni Rostiarti; Bima Arifiyanto
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

Current global economic conditions have made the coal prices become uncertain. PT Bukit Asam (PTBA) has taken corporate action by improving operational efficiency, cost control, develop coal diversification product and also optimizationin the mining operation. One of the operational efficiency programs for cost control in mining operation system is the Electrification Program. This program changed mining operations previously dominated by fuel-based mining system transformed into an electricity-based mining system for an electricshovel continue with the conventional truck. Implementation of Mining Systems with electric-based mining equipment divided into several stages for short-term and long-term targets. Electrification program consist of 7 Units Electric Shovel (PC3000-6E) and 40 Units Rigid DT (Belaz75135) with target20 Million BCM in 2017 located inBanko West Mine. PTBA through the electrification program has succeeded in reducing energy consumption by 333,861.74 GJoule/Years and reducing greenhouse gas emissions by 15,058.49 Ton CO2e/Year. Electrification program has successfully contributed for environmental sustainability by reducing energy consumption and greenhouse gas emissions in accordance with the vision of PTBA into a world-class energy company that cares about the environment.

CFD Analysis Of Flue Gas Streamline Through Varied Of Flow Straightener Inclination Pramadhony Pramadhony; Dewi Puspitasari; Ellyanie Ellyanie; Marwani Marwani; Rizki M. R. Sihombing
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

Air emission, generated by industrial sector, is one of the main contributors of ambient air quality degradation. In order to minimize the impact to its surrounding, the company regularly should conduct an air emission monitoring activity by measuring the hazardous compound concentration. The sample should be taken in a reference plane located two diameter from the outlet. The sampling of air emission by using isokinetic method cannot be conducted when the swirling flow is existed; the streamline is also should be uniform and vertical. Flow straightener with difference inclination angles, 0°, 15°, and 30°, are suggested to condition the streamline and fulfill the requirements. A computational simulation conditions with no flow straightener and with three flow straighteners are conducted to overview the influence of flow straightener inclination. Based on the analysis these inclinations are effectively improving the uniformity of velocity at reference plane. In other side these inclinations are causing the increasing of helicity as well as streamline inclination

Evaluation of Concatenation Planning of Crushing Plant Production System Using Analytic Hierarchy Process (AHP) Method at PT Buana Eltra Coal Processing Unit, South Sumatra Endarto Endarto; Restu Juniah; Weny Herlina
Indonesian Journal of Environmental Management and Sustainability Vol. 2 No. 1 (2018): March
Publisher : Research Centre of Inorganic Materials and Complexs

Coal processing activity conducted at the Coal Processing Unit (Stockpile) Martapura PT. Buana Eltra aims to reduce the size of coal to a smaller size in accordance with market demand of 5-10 cm. Processing is done with a combination of crushing plant and excavator called concatenation of production system. Concatentation of the current production system is a concatenation between Komatsu PC300 excavator and 10 cm roll crusher dimension which produces 145,6701 tons/hour and takes 20,59 hours and is considered inefficient and ineffective to reach production target of 3000 tons/day. Based on the above, it is necessary to evaluate the concatenation of crushing plant production system so that the processing process will be optimally. The method used in this concatenation evaluation is the Analytic Hierarchy Process (AHP) method. The alternative is the concatenation between, Komatsu PC200 excavator - 10 cm roll crusher dimension, Komatsu PC200 excavator - 5 cm roll crusher dimension and Komatsu PC300 excavator - 5 cm roll crusher dimension. The selection of these alternatives is based on qualitative data (criteria from experts) and quantitative data so as to produce optimal choice. Based on the evaluation and analysis of the two types of data then selected concatenation excavator Komatsu PC200 - dimension roll crusher 10 cm which has a productivity of 207,8468 tons/hour and the time required to reach 300 tons/day for 14.43 hours.

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