Organic wastewater generated from polyester manufacturing processes was selected from H company to investigate the feasibility of anaerobic digestion that produces gases including methane. Bio Methane Potential (BMP) tests were conducted to measure the gas production and methane concentration for 7 process wastewater and 2 kinds of sludges from the H company. Also, along with monitoring pH and alkalinity during the anaerobic digestion process, the concentrations of COD and 1,4-dioxane were measured with 4 different operating conditions for N Emulsion (NE) and Ethylene Glycol (EG) wastewater. The BMP tests showed that 65% of methane was produced from NE and EG wastewater. This suggests that the organic wastewater from H company can be effectively treated by an anaerobic digester by which more than 90% of COD was removed.

Abstract
 1. Introduction
 2. Materials and methods
  2.1. Characteristics of organic wastewater
  2.2. Biological Methane Potential (BMP) test
  2.3. Continuous operation of an anaerobic contactprocess
 3. Results and discussion
  3.1. BMP test results and influent wastewaterselection
  3.2. COD removal in the anaerobic contact process
  3.3. Biogas production in the anaerobic contactprocess
 4. Conclusions
 REFERENCES

• Choon-Hwan Shin(Department of Energy & Environmental Engineering, Dongseo University) Corresponding author
• Jun-Seok Bae(Division of Earth Science and Resource Engineering, CSIRO)