English to French Other Livestock / Animal Husbandry biogas production

. The biogas produced is a methane compound (representing 40 to 70 percent of the biogas) in addition to mainly carbon dioxide (30 to 60 percent of the biogas). Those Biodigesters are generally intended for households that have stabled/semi-stabled cattle and thus have dung available with minimum effort required from the customer.

I of course understand the meaning of the phrase (cattle are in the stables all or part of the time) but am not at all sure how to translate this term.

Could you perhaps help?