Petro China won a tender to exploit oil in Iraq,and they built the living and working room for their employee near the project site. Based on the requirement of environmental protection, and waste water from their site need to meet the standard of drainage in local. What’s more, it need to move to other place when this project finished. We cooperated with Petro China and designed such containerized waste water treatment system to treat their living waste water such as washing, toilet etc. and the output water is clean and can completely meet requirement.