Change search
ReferencesLink to record
Permanent link

Direct link
Techno-economic feasibility study of a small-scale biogas plant for treating market waste in the city of El Alto
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Energy and Climate Studies, ECS.
2014 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Every day 493 tonnes of waste containing 67% of organic material is generated in the city of El Alto in Bolivia. The majority of the waste is disposed to a landfill that is expected to reach its maximum capacity by 2015. Therefore, new waste treatment methods need to be explored. The high content of organic material in waste makes biogas technologies a potential solution for waste treatment in El Alto. These technologies can generate a renewable energy source and organic fertilizer that can provide several benefits to the city. The objective of this study is to investigate the techno-economic feasibility of a small-scale biogas plant for treating organic market waste in the city of El Alto. To this end, a multi-criteria analysis was performed to identify a suitable technology. The garage-shaped digester was selected as the most appropriate technology for the conditions of El Alto. By implementing this technology, 1.8 GWh of electricity and 2,340 tonnes of organic fertilizer can be produced annually. Furthermore, an economic analysis of two scenarios was conducted. The Net Present Value (NPV), Internal Rate of Return, Payback time, Levelized Cost of Electricity (LCOE) and sensitivity analysis were evaluated. The biogas plant resulted economically viable in both cases. However, the LCOE estimated (0.17-0.26 USD/kWh) were very high in comparison to the LCOE from natural gas in Bolivia (0.026 USD/kWh). Regarding the sensitivity analysis, several parameters were evaluated from which the compost price was the most influential on changing the NPV. The study also included the estimation of the emission savings. A total of 900 tonnes of CO2/year could be avoided for producing electricity from biogas. Moreover, social benefits could also be generated such as new job opportunities. The use of a small-scale biogas plant for treating organic market waste in the city of El Alto is a cost-effective option. Though, it is fundamental that the government support the waste-to-biogas technologies by introducing economic mechanisms and promoting awareness to ensure the markets for both, biogas and organic fertilizer.

Place, publisher, year, edition, pages
2014. , 67 p.
Keyword [en]
Small-scale biogas plant, techno-economic feasibility, emission savings, social benefits
National Category
Energy Systems
URN: urn:nbn:se:kth:diva-149953OAI: diva2:741758
Subject / course
Energy and Climate Studies
Educational program
Master of Science - Sustainable Technology
2014-06-05, HPT Library, Brinellvägen 68, Stockholm, 15:00 (English)
Available from: 2014-09-01 Created: 2014-08-29 Last updated: 2014-09-01Bibliographically approved

Open Access in DiVA

fulltext(2462 kB)2455 downloads
File information
File name FULLTEXT01.pdfFile size 2462 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Perez Garcia, Adriana
By organisation
Energy and Climate Studies, ECS
Energy Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 2455 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 191 hits
ReferencesLink to record
Permanent link

Direct link