DEar Sumedha Chakma:

I am affraid that you question is not good. The production of biogas in landfill does not depend on depth under surface but on composition of waste in given point. The landfill is highly heterogenous system and this heterogeinity influences also biogas production in given points or segments.  

Regards Vit

If the same composition of waste dumps in the landfill, wouldn't it possible to measure it temporal and spatial generation of gases. It's required sensors to detect the generation of gases. I could not able to make it, thought someone else done it. I am happy that you are finding difficult to my queries, which is very good for research. Anyway thanks for your comments. I do hope some one could able to answer my queries.

Sumedha, 

Practically this would be challenging, but I'm sure could be done.  One way of doing so would be to measure biogas at differing depths of a gas well.  However challenges there would be to ensure that the results are truly representative (i.e. gas could move upwards or downwards within the site before entering the extraction pipe).  

Not only does the composition affect the gas potential, but also the pH, moisture content, microbial population, temperature etc etc.  We have published work in this area where we have looked at the residual biodegradability of samples extracted from landfill at differing depths.  I've attached two recent publications for your perusal, which I hope help you with your work.

Regards

Stuart

Article Compositional analysis of excavated landfill samples and the...

Article Compositional and physicochemical changes in waste materials...

Dear Stuart,

Thanks for updating. Your work seems very interesting.

Regards,

Sumedha

Dear Sumedha Chakma: If are you interesting in research of an artificial landfill having homogenous composition of waste and parameters (moisture content, pH, temperature, concentration of macroibiotic and microbiotic elements, redox conditions etc.), than you can measure the difference of biogas production in different depths. But when all the parameters (which can influence biogas generation) will be the same as well as composition of waste the only parameter which can influence the biogas generation is atmospheric pressure difference between two measurement points in different depths. May be it would be much easier to resaerch the influence of pressure on biogas generation . Best regards Vit

Dear Vit Mateju,

Thank you for your suggestions. It's really open my thoughts.

Regards,

Sumedha

Dear Prof. Alijaradin,

Thanks for your paper. We have also done similar to your work in India. However, I am looking the information for a 40-60 landfill. Please let me know if you come across such field data.