RESOURCE RECOVERY OF KITCHEN WASTES: A TAnD APPROACH
Effects of temperature and substrate on anaerobic digestion of organic wastes were investigated. From characteristic analyses it was found that the majority of COD in kitchen and market wastes came from suspended solids. Kitchen wastes also had high Oil and Grease (O&G) and salt levels, which might be inhibitory to subsequent biological treatment. Batch hydrolysis tests revealed that the major reaction took place in the first 5 hours. BMP (Biochemical Methane Potential) tests indicated that both the kitchen wastes and market wastes (mainly vegetables and fruits) were highly biodegradable. CSTR (Continuously-Stirred Tank Reactor) experiments showed that one system fed with kitchen wastes and operated at 37°C, HRT (Hydraulic Retention Time) = 5 days, and OLR (Organic Loading Rate) = 3 kg/m3-d, failed to reach a steady state. Another system fed with the same substrate but operated at 55°C, HRT = 5 days, and OLR = 3 kg/m3-d, performed very well and the OLR was further increased to 5 kg/m3-d. A composite substrate made with a ratio of kitchen wastes to market wastes to sludge from swine wastewater 5:3:2 (determined from BMP test) was used to feed the chemostat. When this system was operated at 55°C and a HRT of 5 days, the OLR was increased to 12.54 kg/m3-d and still remained stable.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
Document Type: Research Article
Publication date: 2003-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites