Friend
I checked in his post, his request was for Mr. Nabilia, I apologize for responding in front of Mr. Nabilia.
Still post here my contribution.
Study on Biogas. pdf
[url]http://students.chem.tue.nl/ifp24/Interim%20report%20Biogas.pdf[/url]
Biogas Handbook. pdf
[url]http://www.lemvigbiogas.com/BiogasHandbook.pdf[/url]
Good Luck and Good Studies.
