In the process of high concentration organic wastewater treatment,there are lots of biogas.As the main component of biogas,CH₄is not only greenhouse gas,but also a kind of recovery clean energy.Adopting methodology AMS.Ⅲ.H of CDM,the emission reductions of the project in brewery in Hebei Handan are calculated.The result shows that the emission reductions of this project will reach 55,485 tCO₂/ y.Besides,its capital gains will be 12.5%.So implementing emission reduction technology in the field of high concentration organic wastewater treatment has obvious environmental and economic benefits.