scholarly journals Kajian pemanfaatan arang sekam padi aktif sebagai pengolah air limbah gasifikasi

2018 ◽  
Vol 10 (1) ◽  
pp. 9
Author(s):  
Frita Yuliati ◽  
Herri Susanto
Keyword(s):  
Rice Husk ◽  
Net Present Value ◽  
Waste Water Treatment ◽  
Life Time ◽  
Economic Feasibility ◽  
Phenol Adsorption ◽  
Naoh Solution ◽  
North Part ◽  
The Cost ◽  
Daily Capacity

The study of rice husk charcoal utilization as gasification waste water treatment Our laboratory works showed that activated char with a specific surface area of 145 m2/g and adsorption capacity of 1.35 mg/g could be prepared by activating rice husk char using 0.5 M of NaOH solution, at 92 oC (boiling point at atmospheric pressure) for 3 hours. Using this simple process, a cheap activated char could be produced, so that the cost of wastewater treatment might be reduced. Base on common rice mill capacity of 6 tonnes/day in north part of West Java, a production of activated char with a daily capacity of 480 kg might be expected. With assumptions of a plant life time of 8 years, an activated char price is IDR 5,000/kg, and an investment of IDR 545 millions, a production unit of activated char based on rice husk was found to be economically attractive with estimated Net Present Value of IDR 1.22 billions and Return on Investment of 27%. Keywords: Rice Husk, Activated Char, Wastewater, Phenol Adsorption, Economic Feasibility AbstrakAdsorpsi dengan arang aktif merupakan salah satu cara pengolahan air limbah yang mengandung senyawa-senyawa turunan fenol. Pemanfaatan sekam padi diharapkan dapat menghasilkan arang aktif yang murah, sehingga penggunaannya dapat mengurangi biaya operasi di dalam pengolahan air limbah industri. Prosedur pembuatan arang aktif sederhana telah dikembangkan di laboratorium, yaitu aktivasi arang sekam padi dengan larutan NaOH 0,5 M, pada titik didih atmosferik dan selama 3 jam. Arang aktif yang diperoleh memiliki luas permukaan spesifik 145 m2/g dan kapasitas adsorpsi fenol sekitar 1,35 mg/g dari air limbah gasifikasi yang mengandung fenol antara 39-44 mg/L. Laju adsorpsi fenol sesuai dengan persamaan pseudo-orde 1 Lagergren, sehingga diduga proses adsorpsi yang dominan dalam percobaan ini adalah adsorpsi fisik. Atas dasar hasil percobaan ini, sebuah unit usaha kecil/menengah diusulkan untuk dikembangkan bersamaan dengan unit penggilingan gabah yang banyak terdapat di pantai utara Jawa Barat. Unit produksi ini dirancang untuk menghasilkan arang aktif dengan kapasitas 480 kg/hari atas dasar kapasitas penggilingan gabah 30 ton/hari. Dengan asumsi umur pabrik 8 tahun, harga arang sekam aktif sebesar Rp 5.000/kg, investasi sebesar Rp 545 juta menghasilkan NPV sebesar Rp 1,22 miliar dan ROI sebesar 27%. Kata Kunci: Sekam Padi, Arang Aktif, Air Limbah, Adsorpsi Fenol, Kelayakan Ekonomi

Economic considerations and decision support tool for wastewater reuse scheme planning

2007 ◽  
Vol 56 (5) ◽  
pp. 175-182 ◽  
Author(s):  
R. Hochstrat ◽  
D. Joksimovic ◽  
T. Wintgens ◽  
T. Melin ◽  
D. Savic
Keyword(s):  
Water Reuse ◽  
Net Present Value ◽  
Wastewater Reuse ◽  
Reclaimed Water ◽  
Decision Support Tool ◽  
Critical Issue ◽  
Economic Feasibility ◽  
Support Tool ◽  
The Cost ◽  
Economic Considerations

The reuse of upgraded wastewater for beneficial uses is increasingly adopted and accepted as a tool in water management. However, funding of schemes is still a critical issue. The focus of this paper is on economic considerations of water reuse planning. A survey of pricing mechanisms for reclaimed water revealed that most schemes are subsidised to a great extent. In order to minimise these state contributions to the implementation and operation of reuse projects, their planning should identify a least cost design option. This also has to take into account the established pricing structure for conventional water resources and the possibility of gaining revenues from reclaimed water pricing. The paper presents a case study which takes into account these aspects. It evaluates different scheme designs with regard to their Net Present Value (NPV). It could be demonstrated that for the same charging level, quite different amounts of reclaimed water can be delivered while still producing an overall positive NPV. Moreover, the economic feasibility and competitiveness of a reuse scheme is highly determined by the cost structure of the conventional water market.

scholarly journals Studi Kelayakan Ekonomis Rencana Pembangunan Pelabuhan Sungai Liong Desa Berancah Kabupaten Bengkalis

2019 ◽  
Vol 3 (2) ◽  
pp. 146
Author(s):  
Nur Rahmani ◽  
Akmal Lazuardy
Keyword(s):  
Net Present Value ◽  
Payback Period ◽  
Economic Feasibility ◽  
Rate Of Return ◽  
Cost Ratio ◽  
Internal Rate Of Return ◽  
Benefit Analysis ◽  
Present Value ◽  
The Government ◽  
The Cost

The fish shelter port (TPI) is a need that needs to be prepared by local village officials and the government for every coastal village in Bengkalis Regency. This research was conducted in the Berancah village of Bantan District. The analysis in this study describes the economic feasibility mathematically for the construction of a fish storage port (TPI) by calculating the cost ratio (B / C ratio) benefit analysis, payback period (PP), net present value (NPV), and internal rate of return ( IRR). The results obtained from the NPV value (3,661,267,645), BCR value (0.943), IRR value of 10.01%, and PP are in the period of 30 years. Taken as a whole by standardizing the calculations, it can be concluded that the planned construction of a fish shelter in Berancah village is considered not economically feasible, but economic analysis is not merely a benchmark for feasibility, reviewed for the future many benefits will be received by the community around the location of the development plan so that it can improve the welfare of the community in Berancah village.

scholarly journals Analisis Kelayakan Ekonomi Mesin Pencacah Rumput Gajah Tipe Reel

Agrikultura ◽  
2018 ◽  
Vol 29 (3) ◽  
pp. 144
Author(s):  
Wahyu K Sugandi ◽  
Asep Yusuf
Keyword(s):  
Net Present Value ◽  
Payback Period ◽  
Economic Feasibility ◽  
Cost Ratio ◽  
Elephant Grass ◽  
Period Analysis ◽  
Benefit Cost Ratio ◽  
Cutting Machine ◽  
The Cost ◽  
Benefit Cost

ABSTRACTEconomic analysis reel type cutting machine for elephant grassThe need grass for fodder in the region Lembang has been increasing, but it does not followed byits quality. Therefore, cutting machine which is able to cut the fodder no more than 5 cm size is needed. The Laboratory of Agricultural Machinery and Machinery Department of Agricultural Engineering and Biosystem FTIP Unpad had been developed an elephant grass enchant machine inaccordance with the requirements of making the silage, but no economic feasibility analysis has been done for the machine. Therefore it was necessary to study the economic feasibility analysis of elephant grass cutting machine. The method used in this study was the economic analysis methodwhich includes the cost of production and the breakeven point, and business feasibility including net present value (NPV), benefit cost ratio analysis (BCR), internal rate of return (IRR) and payback period analysis (PBP). The results showed that the cost of production of elephant grass enemies was Rp 2,178 / kg with production breakeven 18.769 kg, BC ratio of 1.15, NPV1 of Rp 70,770, - NPV2 of Rp 61.333, - IRR of 27% and payback period during 2 months. So it can be concluded that the use of elephant-type elephant chopper machine was feasible to use.Keywords: Elephant grass, economic analysis, cutting machineABSTRAKKebutuhan rumput gajah untuk pakan ternak (silase) di daerah Lembang terus meningkat. Syarat pembuatan silase tersebut bahwa panjang potongan rumput gajah sebaiknya < 5 cm. Untuk itudiperlukan sebuah mesin pencacah rumput gajah sesuai syarat pembuatan silase. LaboratoriumAlat dan Mesin Pertanian Departemen Teknik Pertanian dan Biosistem FTIP Unpad telah mengembangkan sebuah mesin pencacah rumput gajah sesuai syarat pembuatan silase tersebut, tetapi belum dilakukan analisis kelayakan ekonomi untuk mesin tersebut. Oleh karena itdiperlukan suatu penelitian berkenaan dengan analisis kelayakan ekonomi mesin pencacah rumput gajah. Metode yang digunakan pada penelitian ini adalah metode analisis ekonomi yang meliputi biaya pokok produksi dan titik impas, serta kelayakan usaha yang meliputi net present value(NPV), benefit cost ratio analysis (BCR), internal rate of return (IRR) dan payback period analysis(PBP). Hasil penelitian menunjukkan bahwa biaya pokok produksi mesin pencacah rumput gajah adalah Rp 2.178/kg dengan titik impas produksi 18.769 kg, BC rasio sebesar 1,15, NPV1 sebesar Rp 70.770,- NPV2 = Rp 61.333,- IRR sebesar 27% dan payback period selama 2 bulan. Maka dapat disimpulkan bahwa pengunaan mesin pencacah rumput gajah tipe reel layak digunakan. Kata Kunci : Rumput Gajah, Analisis Ekonomi, Mesin Pencacah

Analisis Kelayakan Pengoperasian Instalasi Pengolahan Air Limbah (IPAL) CV Proma Tun Probolinggo

2019 ◽  
Vol 10 (1) ◽  
pp. 26-34
Author(s):  
Tri Prihatiningsih ◽  
Haryono Haryono
Keyword(s):  
Net Present Value ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Liquid Waste ◽  
Water Treatment Plant ◽  
Economic Feasibility ◽  
Waste Water Treatment Plant ◽  
Cost Ratio ◽  
Methane Formation ◽  
Benefit Cost Ratio

Tofu is a traditional Indonesian food that is very popular with the community. The tofu production process produces solid and liquid waste. The liquid waste contains very high BOD, COD, and TSS which has the potential to pollute the environment, therefore it is necessary to have a Waste Water Treatment Plant (WWTP). This study aims to determine the economic feasibility study of the operation of the WWTP. The research was conducted at CV. Proma Tun Saroyyan Probolinggo. To find out the economic feasibility of the operation of WWTPs using the parameters of the Net Present Value (NPV), Payback Period (PP) and Benefit Cost Ratio (B / C R).  The results showed that the WWTP used was the Anaerob-Biogas system, the anaerobic system is wastewater treatment by utilizing microorganisms that work without oxygen-free, with three stages, namely: Hydrolysis, Acidification, and Methane Formation Stage. The resulting methane gas (biogas) is a mixture of various types of gases, including CH4 (54% -70%), CO2 (27% -45%), O2 (1% -4%), N2 (0.5% -3%), CO (1%), and H2 which are stored in the gas holder and distributed to the community as an alternative fuel to replace LPG gas. For an analysis of economic feasibility with NPV criteria shows that the biogas WWTP is profitable because the NPV value is positive at Rp. 58,249,000. Based on the criteria of PP, which is 5 years 10 months 20 days, which means that the time is quite short and does not exceed the age of the economical gas holder. And the value of B / C Ratio is 1.4109 which means that the WWTP biogas in the CV. Proma Tun Saroyyan Probolinggo deserves to be developed because of the value of B / C R> 1.

scholarly journals Techno-Economic Feasibility Study of Small Wind Turbines in the Valley of Mexico Metropolitan Area

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 890 ◽  
Author(s):  
Osvaldo Rodriguez-Hernandez ◽  
Manuel Martinez ◽  
Carlos Lopez-Villalobos ◽  
Hector Garcia ◽  
Rafael Campos-Amezcua
Keyword(s):  
Wind Turbines ◽  
Metropolitan Area ◽  
Alternative Energy ◽  
Net Present Value ◽  
Flow Analysis ◽  
Economic Feasibility ◽  
Social Penetration ◽  
Small Wind Turbines ◽  
The Cost

The use of small wind turbines (SWTs) is an alternative energy strategy with increasing potential for satisfying in situ electrical demands and should be studied to promote social penetration. The Valley of Mexico Metropolitan Area (VMMA) has air pollution issues that need to be addressed. This has resulted in programs for monitoring atmospheric variables, such as wind speed. By selecting and using 3 years’ worth of available data, we developed a methodology to study the technical and economic feasibility of using SWTs in the VMMA. To this end, 28 SWT models were assessed at 18 locations to estimate annual energy production. In light of certain data characteristics, an adjustment to the power production was proposed for the specific case of using SWTs. Cash flow analysis and annualized net present value (ANPV) were used to determine economic feasibility for each location; furthermore, electric home feeds in the VMMA were considered to model local economic conditions. Similar wind conditions were observed within the VMMA; however, only two wind turbine and location models provided positive ANPV values. The extra annual benefit for each project was calculated by associating the cost per mitigation of CO2 emissions, which may provide an economic strategy for promoting the penetration of this technology.

scholarly journals Assessment of the Economic and Social Impact of Shared Parking in Residential Areas

Information ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 411
Author(s):  
Xiaofei Ye ◽  
Xinliu Sui ◽  
Jin Xie ◽  
Tao Wang ◽  
Xingchen Yan ◽  
...  
Keyword(s):  
Social Impact ◽  
Net Present Value ◽  
Sensitivity Coefficient ◽  
Social Benefit ◽  
Economic Feasibility ◽  
Residential Areas ◽  
Risks And Benefits ◽  
Theoretical Support ◽  
The Cost ◽  
Risk And Benefit

Shared parking schemes are not commonly implemented in residential areas due to the uncertainty and conflicts associated with the benefits of such schemes for stakeholders, namely, parking suppliers, parking managers, and the public. To evaluate the economic and social impacts of shared parking in residential areas on its stakeholders, the risk and benefit factors were determined through influential analysis and a questionnaire. A risk–benefit model was established to quantify the risks and benefits for stakeholders. The social return on investment and sensitivity analysis were applied to estimate the economic feasibility of shared parking in residential areas. The methodology combined the use of qualitative, quantitative, and financial information gathered and analyzed to estimate the “value” of shared parking, including its risks, benefits, management pressure, and social benefit. The model was calibrated using the survey data collected from the city of Ningbo in China. The results showed that: (1) The net present value was negative, indicating that the benefits of shared parking were lower than the risks, and thus this scheme would not be economically feasible in residential areas. (2) The cost of purchasing new equipment and rebuilding parking lots had the greatest impact on the benefits of shared parking in residential areas, with a sensitivity coefficient of 4.396, followed by the income from shared parking charges (3.885), and the salary of parking managers (3.619). (3) If the income from parking charges and the salary of parking managers were more than 69,408.5 and 31,091.1 yuan per month, respectively, and the cost of improving parking infrastructure was less than 14,003.2 yuan per month, residential areas could obtain additional benefits due to the acceptance of a shared parking scheme. This study provides theoretical support for the reasonable determination of the costs, risks, and benefits associated with participating in a shared parking scheme in a residential area.

scholarly journals Selection of a chipper technology for small-scale operations – a Finnish case

2019 ◽  
Vol 65 (No. 4) ◽  
pp. 121-133 ◽  
Author(s):  
Juha Laitila ◽  
Robert Prinz ◽  
Lauri Sikanen
Keyword(s):  
Large Scale ◽  
Net Present Value ◽  
Unit Cost ◽  
Economic Feasibility ◽  
Operating Costs ◽  
Small Scale ◽  
Technical Details ◽  
The Cost ◽  
Cost Factors ◽  
Selection Of

The objective of this study was to determine the economic performance of alternative chipper choices for small-scale chipping based on unit cost (€ per chip-m3) and net present value (NPV) calculations. For the chipping cost and investment profitability analyses four tractor-powered professional or semi-professional disc chippers and two professional drum chippers mounted on a truck or powered by tractor were selected. Initial investment, operating costs, and the cost of outsourced chipping were the key elements for comparing the profitability of investment alternatives. The average purchase prices, cost factors, and technical details of the chipper units were acquired from machine dealers, specification sheets, a literature review, and interviews with chipping entrepreneurs. The results of the three tractor-powered professional chippers involved in the comparison were very close to each other. The profitable running of a truck-mounted drum chipper calls for high annual chipping volumes: the chipper type is therefore a feasible choice for an entrepreneur in large-scale chipping. Semi-professional disc chippers offer lower investment costs, but their economic feasibility is relatively poor.

Analisis Kelayakan Pengoperasian Instalasi Pengolahan Air Limbah (IPAL) CV Proma Tun Probolinggo

2019 ◽  
Vol 10 (1) ◽  
pp. 26-34
Author(s):  
Tri Prihatiningsih ◽  
Haryono
Keyword(s):  
Net Present Value ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Liquid Waste ◽  
Water Treatment Plant ◽  
Economic Feasibility ◽  
Waste Water Treatment Plant ◽  
Cost Ratio ◽  
Methane Formation ◽  
Benefit Cost Ratio

Tofu is a traditional Indonesian food that is very popular with the community. The tofu production process produces solid and liquid waste. The liquid waste contains very high BOD, COD and TSS which has the potential to pollute the environment, therefore it is necessary to have a Waste Water Treatment Plant (WWTP). This study aims to determine the economic feasibility study of the operation of the WWTP. The research was conducted at CV. Proma Tun Saroyyan Probolinggo. To find out the economic feasibility of the operation of WWTPs using the parameters of the Net Present Value (NPV), Payback Period (PP) and Benefit Cost Ratio (B / C R)             The results showed that the WWTP used was the Anaerob-Biogas system, the anaerobic system is wastewater treatment by utilizing microorganisms that work without oxygen free, with three stages, namely: Hydrolysis, Acidification, and Methane Formation Stage. The resulting methane gas (biogas) is a mixture of various types of gases, including CH4 (54% -70%), CO2 (27% -45%), O2 (1% -4%), N2 (0.5% -3%), CO (1%), and H2 which are stored in the gas holder and distributed to the community as an alternative fuel to replace LPG gas.             For an analysis of economic feasibility with NPV criteria shows that the biogas WWTP is profitable, because the NPV value is positive at Rp. 58,249,000. Based on the criteria of PP, which is 5 years 10 months 20 days, which means that the time is quite short and does not exceed the age of the economical gas holder. And the value of B / C Ratio is 1.4109 which means that the WWTP biogas in the CV. Proma Tun Saroyyan Probolinggo deserves to be developed because of the value of B / C R> 1.  

scholarly journals Cost Analysis of Deploying Femtocells in Speed Trains in Nigeria to Improve Indoor Coverage and Capacity of LTE Network

2021 ◽  
Author(s):  
Raphael Eze ◽  
Mamilus Ahaneku ◽  
Udora Nwawelu ◽  
Douglas Amoke
Keyword(s):  
Cost Analysis ◽  
Discount Rate ◽  
Net Present Value ◽  
Capital Expenditure ◽  
Life Time ◽  
Cost Effective ◽  
Tax Rate ◽  
Railway Line ◽  
Lte Network ◽  
The Cost

Abstract The cost analysis of deployment of femtocells in speed trains along Abuja-Kaduna standard gauge railway line to improve the coverage and capacity of Long Term Evolution (LTE) network for 5000 commuters using that route daily is presented in this paper. Additional cost will include the cost of femtocells procurement, license, installation, backhaul, operation & maintenance. The cost analysis is carried out using techno-economic model to determine the business viability of embarking on such a project by LTE network providers in Nigeria. The estimated capital expenditure (CAPEX) and operating expenditure (OPEX) as well as the projected revenues accrues from this project form the cash outflows and cash inflows are used to simulate the net present value (NPV) and internal rate of return (IRR) in MS Excel environment on a discount rate and tax rate of 22%, and 30%, respectively to determine the feasibility of the investment. The results of their NPV values which are positive show that the macro-femtocell arrangement in speed train plying Abuja-Kaduna railway route is cost effective for a life time of 10 years and is feasible up to an IRR 53% which exceeds the estimated discount rate of 22%. The value of the payback period indicates that it will not take long for any LTE network provider in Nigeria to recover their investment. The result of the NPV sensitivity analysis shows how various cost and non-cost parameters affect the cost-effectiveness of such investment.

scholarly journals Analisis Kelayakan Ekonomi Mesin Pencacah Rumput Gajah Tipe Reel

Agrikultura ◽  
2019 ◽  
Vol 29 (3) ◽  
pp. 144
Author(s):  
Wahyu Kristian Sugandi ◽  
Asep Wahyu
Keyword(s):  
Net Present Value ◽  
Payback Period ◽  
Economic Feasibility ◽  
Cost Ratio ◽  
Elephant Grass ◽  
Period Analysis ◽  
Benefit Cost Ratio ◽  
Cutting Machine ◽  
The Cost ◽  
Benefit Cost

ABSTRACTEconomic analysis reel type cutting machine for elephant grassThe need grass for fodder in the region Lembang has been increasing, but it does not followed by its quality. Therefore, cutting machine which is able to cut the fodder no more than 5 cm size is needed. The Laboratory of Agricultural Machinery and Machinery Department of Agricultural Engineering and Biosystem FTIP Unpad had been developed an elephant grass enchant machine in accordance with the requirements of making the silage, but no economic feasibility analysis has been done for the machine. Therefore it was necessary to study the economic feasibility analysis of elephant grass cutting machine. The method used in this study was the economic analysis method which includes the cost ofproduction and the breakeven point, and business feasibility including net present value (NPV), benefit cost ratio analysis (BCR), internal rate of return (IRR) and payback period analysis (PBP). The results showed that the cost of production of elephant grass enemies was Rp 2,178 / kg with production breakeven 18.769 kg, BC ratio of 1.15, NPV1 of Rp 70,770, - NPV2 of Rp 61.333, - IRR of 27% and payback period during 2 months. So it can be concluded that the use of elephant-type elephant chopper machine was feasible to use.Keywords: Elephant grass, economic analysis, cutting machineABSTRAKKebutuhan rumput gajah untuk pakan ternak (silase) di daerah Lembang terus meningkat. Syarat pembuatan silase tersebut bahwa panjang potongan rumput gajah sebaiknya &lt; 5 cm. Untuk itu diperlukan sebuah mesin pencacah rumput gajah sesuai syarat pembuatan silase. Laboratorium Alat dan Mesin Pertanian Departemen Teknik Pertanian dan Biosistem FTIP Unpad telah mengembangkan sebuah mesin pencacah rumput gajah sesuai syarat pembuatan silase tersebut, tetapi belum dilakukan analisis kelayakan ekonomi untuk mesin tersebut. Oleh karena it diperlukan suatu penelitian berkenaan dengan analisis kelayakan ekonomi mesin pencacah rumput gajah. Metode yang digunakan pada penelitian ini adalah metode analisis ekonomi yang meliputi biaya pokok produksi dan titik impas, serta kelayakan usaha yang meliputi net present value (NPV), benefit cost ratio analysis (BCR), internal rate of return (IRR) dan payback period analysis (PBP). Hasil penelitian menunjukkan bahwa biaya pokok produksi mesin pencacah rumput gajah adalah Rp 2.178/kg dengan titik impas produksi 18.769 kg, BC rasio sebesar 1,15, NPV 1 sebesar Rp 70.770,- NPV 2 = Rp 61.333,-IRR sebesar 27% dan payback period selama 2 bulan. Maka dapat disimpulkan bahwapengunaan mesin pencacah rumput gajah tipe reel layak digunakan.Kata Kunci : Rumput Gajah, Analisis Ekonomi, Mesin Pencacah

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