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- Title
Adsorption and biodegradation of 2-chlorophenol by mixed culture using activated carbon as a supporting medium-reactor performance and model verification.
- Authors
Lin, Yen-Hui
- Abstract
A non-steady-state mathematical model system for the kinetics of adsorption and biodegradation of 2-chlorophenol (2-CP) by attached and suspended biomass on activated carbon process was derived. The mechanisms in the model system included 2-CP adsorption by activated carbon, 2-CP mass transport diffusion in biofilm, and biodegradation by attached and suspended biomass. Batch kinetic tests were performed to determine surface diffusivity of 2-CP, adsorption parameters for 2-CP, and biokinetic parameters of biomass. Experiments were conducted using a biological activated carbon (BAC) reactor system with high recycled rate to approximate a completely mixed flow reactor for model verification. Concentration profiles of 2-CP by model predictions indicated that biofilm bioregenerated the activated carbon by lowering the 2-CP concentration at the biofilm-activated carbon interface as the biofilm grew thicker. The removal efficiency of 2-CP by biomass was approximately 98.5% when 2-CP concentration in the influent was around 190.5 mg L at a steady-state condition. The concentration of suspended biomass reached up to about 25.3 mg L while the thickness of attached biomass was estimated to be 636 μm at a steady-state condition by model prediction. The experimental results agree closely with the results of the model predictions.
- Subjects
CHLOROPHENOL biodegradation; ACTIVATED carbon; BIODEGRADATION of sewage sludge; SEWAGE purification; ADSORPTION (Chemistry); BIOFILMS
- Publication
Applied Water Science, 2017, Vol 7, Issue 7, p3741
- ISSN
2190-5487
- Publication type
Article
- DOI
10.1007/s13201-016-0522-0