Comparison of COD and Toxicity Removal during Activated Sludge and MBBR Treatment of Kraft Pulp Mill Effluent
This study compared treatment of bleached eucalypt kraft pulp mill effluent in bench-scale activated sludge and moving bed biofilm reactors (MBBR) operated in parallel at hydraulic retention times (HRTs) of 12 and 24 hours and operated in series (activated sludge followed by MBBR) at HRTs of 12 hours each. COD, recalcitrant compound (lipophilic extractives and lignin), and toxicity removal efficiencies were compared in the reactors operated under different conditions. Results indicated high COD removal efficiency in both systems under the different configurations tested with no significant differences found between treatments, except for a greater proportion of high molar mass COD remaining after treatment at a 12 hour HRT. The MBBR presented higher extractives removal efficiency than the activated sludge system and greater solids retention under stress conditions. Treatment by either system reduced or eliminated chronic toxicity to Ceriodaphnia dubia after adequate adaptation of biosolids to the effluent.
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: 2012-01-01
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 These proceedings are not peer reviewed.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