Effect of biogenic substrate concentration on chlorophenol degradation kinetics

Date

2006-09-01

Author

ŞAHİNKAYA, Erkan
Dilek, Filiz Bengü

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

208
views

0
downloads

The effects of biogenic substrate (peptone) concentration on reactor performance, yield coefficient (Y) and degradation kinetics were evaluated in an instantaneously fed sequencing batch reactor (SBR) receiving a mixture of 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP). High chemical oxygen demand (COD) removal efficiencies (90-95%) and complete removal of chlorophenols were observed even in the absence of peptone (i.e. chlorophenols served as sole carbon and energy sources). During the degradation of 4-CP, 5-chloro2-hydroxymuconic semialdehyde (CHMS, the meta cleavage product of 4-chlorocatechol) accumulated but was subsequently completely removed. 2,4-DCP competitively inhibited 4-CP degradation, as 4-CP degradation only commenced after complete removal of 2,4-DCP. It was concluded that decreasing peptone concentration did not affect chlorophenol degradation profiles in the reactor. The chlorophenol degradation kinetic studies suggest that competent biomass alone was responsible for chlorophenol degradation. Consequently, it was thought that competent biomass concentration was constant even though peptone concentration in the feed was varied, as competent biomass grows on chlorophenols only. Models developed using this assumption agreed well with experimental data, which also confirmed that a biogenic substrate has no impact on chlorophenol degradation profiles in an SBR with instantaneous feed. (c) 2006 Society of Chemical Industry.

Subject Keywords

Biotechnology, Fuel Technology, Inorganic Chemistry, Renewable Energy, Sustainability and the Environment, Organic Chemistry, Waste Management and Disposal, Pollution, General Chemical Engineering

URI

https://hdl.handle.net/11511/37980

Journal

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY

DOI

https://doi.org/10.1002/jctb.1557

Collections

Department of Environmental Engineering, Article

Suggestions

OpenMETU
Core

Effect of biogenic substrate concentration on the performance of sequencing batch reactor treating 4 CP and 2 4 DCP mixtures ŞAHİNKAYA, ERKAN; Dilek, Filiz Bengü (Elsevier BV, 2006-03-01) Effect of a biogenic substrate (peptone) concentration on the performance of sequencing batch reactor (SBR) treating 220 mg/l 4-chlorophenol (4-CP) and 110 mg/l 2,4-dichlorophenol (2,4-DCP) mixtures was investigated. In this context, peptone concentration was gradually decreased from 300 mg/l to null in which chlorophenols were fed to the reactor as sole carbon and energy sources. By this way, the effect of peptone concentration on observed yield coefficient (Y), biomass concentration, chlorophenols and COD...
EFFECTS OF SUBSTRATE CONCENTRATION ON GROWTH AND LACTIC-ACID PRODUCTION BY MIXED CULTURES OF LACTOBACILLUS-BULGARICUS AND STREPTOCOCCUS-THERMOPHILUS OZEN, S; OZILGEN, M (Wiley, 1992-01-01) The kinetics of growth and lactic acid production by mixed cultures of Lactobacillus bulgaricus and Streptococcus thermophilus were modeled with a set of modified logistic and Luedeking-Piret equations. The specific growth rates and the inhibitory effect of each individual species on the mixed culture growth were found to be determined by the media composition. The kinetic analysis clearly showed that the contribution of each microbial species to the mixed culture growth process changed drastically when the...
Effect of pH, flow rate and concentration on the sorption of Pb and Cd on montmorillonite: II. Modelling Altin, O; Ozbelge, OH; Doğu, Timur (Wiley, 1999-12-01) A mathematical model is proposed and compared with experimental data for the migration of heavy metal ions (Pb and Cd) during the flow of aqueous solutions through calcium-saturated montmorillonite packing. The main system parameters are pH, flow rate and concentration. It is assumed that the Liquid phase in the porous montmorillonite can be divided into two regions, mobile and immobile; that adsorption and ion exchange on the clay surface are instantaneous, and that adsorption isotherms are Linear througho...
CHARACTERIZATION OF ACTIVATED CARBON PRODUCED FROM ALMOND SHELL AND HAZELNUT SHELL BALCI, S; Doğu, Timur; YUCEL, H (Wiley, 1994-08-01) Ammonium chloride-impregnated and untreated almond shell and hazelnut shell samples were carbonized in a flow of nitrogen at relatively low temperatures. Pore structure characterization and sorption capacities of activated carbons prepared from shells of almond and hazelnut indicated that treatment with NH4Cl increased the total surface area and improved sorption characteristics. Chemical activation carried out at 350-degrees-C gave products with surface area values above 500 m2 g-1. On the other hand, the ...
Effect of inorganic salts on the main parameters of the dilute aqueous poly(vinylpyrrolidone) solutions Salamova, UU; Rzaev, ZMO; Altindal, S; Masimov, AA (1996-06-01) The effect of inorganic salts (cosolute) on the main parameters of dilute aqueous poly(vinylpyrrolidone) (PVP) solutions, such as cloud points, phase diagram, theta temperature and viscosity was studied experimentally using various concentrations of salts and said polymer at varying temperatures. It is shown that, thermodynamic incompatibility of aqueous PVP-salts solutions strongly depends on the character of effect of salts (water-structure breakers or water-structure makers). Inclusion of salts into aque...

Citation Formats

E. ŞAHİNKAYA and F. B. Dilek, “Effect of biogenic substrate concentration on chlorophenol degradation kinetics,” JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, pp. 1530–1539, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37980.