i feel it is mandatory that the technic wiki on Mob Essence(M.E. for now) is incorrect(like most others) as you can not only gain M.E. from grinders/slaughters but also from sewers... much more so from sewers then grinders if i may say so myself. i do not know if this is a feature or a bug(altough i would be a very nice bug then) but i just wanted to let you guys know, specificaly the newer people who want to try out a auto-enchanter or auto-spawner. setup a breeding ground with grinder, chronotyper, breeder etc. and then put in a sewer block aswell. hook this up to a liquid router. use the router to seperate the M.E. from the sewage and you got yourself a great supply of M.E.
also: hook up the sewage to a composter, hook that up to a fertilizer. and use that with a planter and harvester for a wheat field. and well... you get the picture from there on out