Communal Polyethylene Biogas systems – A summary

Isa Stoddard

Isak Stoddard

Sebuah penelitian yang dilakukan Isak Stoddart di Workshop Biogas BCL, Lembang, Tahun 2007, yang menjadi bahan penelitian untuk thesis masternya, yaitu mengenai Communal Polyethylene Biogas Systems – Experiences from On-farm Research in West Java.

Hasil penelitian ini bisa menjadi bahan kajian yang menarik untuk melakukan upaya-upaya pengembangan program biogas di Indonesia.

Ringkasan dari program serta link terkait dengan riset yang Isak Stoddart lakukan ada di bawah ini.

Sumber : http://isakstoddard.blogspot.com/2010/09/communal-polyethylene-biogas-systems.html

 

 

Summary
Humanity faces a large number of global, interconnected and converging crises in bothnatural and human-constructed systems. There is an urgent need for research that aims tounderstand their dynamics and find possible solutions to them. Local and contextualresearch is especially important in areas where the people will suffer the worstconsequences of the above mentioned crises. In the rural areas around the city of Lembang, on Western Java, people are experiencing an increased uncertainty in terms of access to energy for cooking as well as other bare necessities. In the light of this situation,a local biogas initiative was initiated in 2007. Two years later, field work for this Master Thesis, contributed to the research activity of the initiative and helped to document thefindings of the past years.Given the potential advantages and promises of communal solutions to problems of regional resource scarcity, the main purpose of the study was to investigate the possibilityof developing a small-scale communal biogas system. Considering the economic situationof the local people, the systems were designed to be affordable and constructed out of materials that are locally available (mainly polyethylene plastic and PVC-pipes). Thebiogas systems were analyzed both from a technical perspective, where different set-upswere used to conduct relevant experiments, and from a user perspective, where biogassystems in use were observed for a longer period of time.Results indicate that it is fully possible to develop communal biogas systems but that theyonly should be constructed and installed given a certain set of circumstances. Regulationof gas flow, and a fair distribution of gas between connected households, turned out to bethe largest technical and operational challenge. The loading of the digester was alsoidentified as a major operational issue. In many cases a single-family system is a morereliable and wise choice.There is a large potential for continued development and diffusion of biogas systems inthe area around Lembang. 10 % of the total energy demand for cooking could be coveredby small-scale biogas production, if all of the substrate from the many cows in the areawas used. Unfortunately, out of the 14 biogas systems that have been installed so far, amajority of them are no longer working as a result of either faulty design or mismanagement. This clearly highlights the need for further research as well astechnician training, if biogas is to become a reliable and important source of energy for cooking in Lembang.

Decision Making Diagram and Conceptual Framework for Development Communal Biogas

(Teja)

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