A study on treatment of kitchen wastewater including oil by combination system of the ozone, two-step UASB and DHS reactor

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K00647
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Design and evaluation of sustainable and environmental conscious system
• Research Institution: Kochi National College of Technology
• Principal Investigator: YAMAZAKI Shinichi 高知工業高等専門学校, ソーシャルデザイン工学科, 教授 (60290821)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: オゾン / マイクロバブル / 生物学的処理 / 厨房排水 / メタンエネルギー

Outline of Final Research Achievements

Fat and oil in kitchen wastewater discharged from restaurants cause clogging and odor of sewer pipes. Therefore fat separated by oil/water separator called grease trap is periodically collected, and then disposed through dehydration, drying, incineration, and landfill. However, the disposal cost of fat are high. This study considered the treatment performance of a new kitchen wastewater system which combined anaerobic reactor and aerobic reactor. The system in lab scale was operated continuously to confirm the treated water quality and investigate the possibility of recovering methane. The result showed that the treated water quality could be less than the environmental standard. Also, the high methane partial pressure of approximately 80% was obtained.

Free Research Field

環境工学