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Thank you for getting back to me. The websites are immensely helpful, the second is in Khemi which is really useful as the person I am working with and explaining the process of biogas production to be Cambodian. He has a degree in agriculture and is working for the NGO I am currently working with.

In response to your questions, I am working with an NGO called Cambodian Hope Organisation (CHO). They are based in Poipet just over the Thai boarder. Materials such as bricks, cement, and concrete are available so it seems to be a very practical and sustainable design for the area. Some of the more specific parts may need to be imported from Thailand or sourced in Phnom Phen. The problem is more sourcing local skilled labourers; do you know how technical labourers need to be. If a skilled engineer could supervise the process and support locals would that suffice?

Also regarding the gas outlet; the site I am working with is to eventually have 10 to 12 buildings. The instructions suggest a separate digester is needed for each building, and that a recommended distance is 20m from the building. At present the pig pen foundations are laid about 200m from the to be children's homes would that incur too great a pressure drop in the piping to run pipes that length? And could we distribute the gas produced to more than one building? There are to be 30 pigs on the site so we are looking at about 150kg of dung so I am reckoning a 10m3 reactor is feasible or five 4m3 reactors if we needed one per building.

If you have any other suggestions or any recommendations with regards to the benefits of using the biogas to generate electricity and whether this would be a more or less efficient use of the gas produced that would be most helpful.

Regards,

Miriam