In an anaerobic bioacter converting sewage to methane, what would be the effects of the following treatments and the resulting effects on methane production and bioacter performance over the next few days. Briefly explain why would you expect these results.

-Add an inhibitor of acetate utilizing methanogens
-Add an inhibitor of hydrogen utilizing methanogens
-Add a large dose of 5% lactose
-Add a large dose of nitrate
-Add a large amount of tetracycline, a broad spectrum antibiotic