... )2. Series HCY machine is energy-saving, environment friendly machine, during the process it just generates less waste (sludge), the waste (Sludge) doesn't ... odor and no environment pollution.3. Series HCY mainly combust fuel (The fuel can be the waste engine oil self) to heat ... production line,treat waste engine oil ,motor oil into diesel.sludge oil recycling machine,crude oil refinery,CE certific