TREATMENT OF HIGH STRENGTH PET FOOD WASTEWATER USING TWO STAGE MEMBRANE BIOREACTORS
This study explored two stages MBR to treat DAF-pretreated high strength pet food wastewater characterized by oil & grease concentrations of up to 50,000 to 82,000 mg/L and total COD and BOD5 concentration of 100,000 and 80,000 mg/L respectively to meet stringent surface discharge criteria i.e. BOD5, TSS and NH4-N of < 10 mg / L. As anticipated, organic contaminants were removed primarily in the 1st stage, followed by almost complete removal of ammonia in the 2nd stage. More then 96% of COD was removed in the 1st stage even at hydraulic retention time of 2.8 days which was attributed to ability of the membrane to retain biomass with total suspended solids (TSS) concentration of up to 35 g/L. Overall removal of TSS, total COD, total BOD5 and ammonia was 100%, 95.2%, 99.9% and 99.7% respectively, which rendered concentration of these parameters <10 mg/L in the final effluent. Rise in poorly biodegradable COD across the 2nd stage reduced overall COD removal efficiency of the system. Occurrence of consistent nitrite accumulation observed over a period of more than 100 days (or >17 overall HRTs) even at dissolved oxygen (DO) concentration of more than 2.5 mg/L was remarkable. Residual alkalinity requirement for nitrification was quantified. Membrane performance in contaminant removal and its operational aspects were extensively studied in this work.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 01 January 2004
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 These proceedings are not peer reviewed.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