The return flows of reject water from sewage sludge dewatering alter the activated sludge process ina conventional WWTP and increase TN concentration in the final effluent from WWTP. The objectiveof the investigation carried out was to consider the application of multistage treatment wetland(MTW) for the treatment of reject water from sewage sludge dewatering in a centrifuge (RWC). Thispaper aims to present the design and performance of each stage of the treatment as well as theefficiency of total MTW. The full scale pilot plant for RWC, consisting of two vertical flow beds (SS VF)working in series, followed by an horizontal flow bed (SS HF), was built in 2008. The appliedconfiguration ensured a very high removal efficiency of principal pollutant (COD - 76.0% and NH4þ-N- 93.6%). In the investigated facilities, the SS VF beds ensured an effective removal of nitrogencompounds, especially NH4þ-N, whereas the decomposition of hardly degradable Org-N and CODtook place in SS HF. This research illustrates that the MTW could be successfully applied for thetreatment of RWC.
Authors
Additional information
- DOI
- Digital Object Identifier link open in new tab 10.2166/wst.2011.619
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2011
