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. 2013 May 24;11(1):3.
doi: 10.1186/2052-336X-11-3.

Biological degradation of catechol in wastewater using the sequencing continuous-inflow reactor (SCR)

Ali Ahmad Aghapour, Gholamreza Moussavi  1 , Kamyar Yaghmaeian
Affiliations

Biological degradation of catechol in wastewater using the sequencing continuous-inflow reactor (SCR)

Ali Ahmad Aghapour et al. J Environ Health Sci Eng. .

Abstract

Catechol is used in many industries. It can be removed from wastewater by various methods but biological processes are the most superior and commonly used technology. The SCR is a modified form of SBR used to degrade catechol. The objective of this study was to investigate the performance of SCR for biodegradation and mineralization of catechol under various inlet concentrations (630-1500 mg/L) and hydraulic retention times (HRT) (18-9 h). This study used a bench scale SCR setup to test catechol degradation. The acclimation time of biomass for catechol at degradation at 630 mg/L was 41 d. The SCR operating cycle time was 6 h and the consecutive times taken for aerating, settling and decanting were 4, 1.5 and 0.5 h, respectively. This study investigated the effects of inlet catechol concentration (630-1560 mg/L) and HRT (18-9 h). The average catechol removal efficiencies in steady-state conditions of 630, 930, 12954 and 1559 mg/L of catechol were 98.5%, 98.5%, 98.2% and 96.9% in terms catechol and 97.8%, 97.7%, 96.4% and 94.3% for COD, respectively. SCR with acclimated biomasses could effectively remove the catechol and the corresponding COD from wastewater with concentrations of up to 1560, at the loading rate of 5.38 kg COD/m3.d and at a HRT of up to 13 h. The HRT was determined as an important variable affecting catechol removal from wastewater. Reducing the HRT to below 13 h led to reduced removal of catechol and COD.

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Figures

Figure 1
Figure 1
Flow diagram of the SCR experimental setup.
Figure 2
Figure 2
Catechol and COD removal percentages during the SCR start-up phase.
Figure 3
Figure 3
Profile of the catechol and COD removal efficiencies at various inlet concentrations.
Figure 4
Figure 4
The ortho and meta cleavage pathways in aerobic degradation of catechol [[15]].
Figure 5
Figure 5
The average catechol and COD removal efficiency at steady-state condition as a function of inlet concentration.
Figure 6
Figure 6
The average catechol and COD removal efficiency at steady-state condition as a function of the inlet concentration.
Figure 7
Figure 7
Mineralization of catechol in phase I at various mass organic loading.
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References

    1. Lofrano G, Rizzo L, Grassi M, Belgiorno V. Advanced oxidation of catechol: A comparison among photocatalysis, Fenton and photo-Fenton processes. Desalination. 2009;249:878–883. doi: 10.1016/j.desal.2009.02.068. - DOI
    1. Subramanyam R, Mishra IM. Biodegradation of catechol (2-hydroxy phenol) bearing wastewater in an UASB reactor. Chemosphere. 2007;69:816–824. doi: 10.1016/j.chemosphere.2007.04.064. - DOI - PubMed
    1. Moussavi G, Barikbin B, Mahmoudi M. The removal of high concentrations of phenol from saline wastewater using aerobic granular SBR. Chem Eng J. 2010;158:498–504. doi: 10.1016/j.cej.2010.01.038. - DOI
    1. Kumar A, Kumar S, Kumar S. Biodegradation kinetics of phenol and catechol using Pseudomonas putida MTCC 1194. Biochem Eng J. 2005;22:151–159. doi: 10.1016/j.bej.2004.09.006. - DOI
    1. Rigo M, Alegre RM, Bezerra JRMV, Coelho N, Bastos RG. Catechol Biodegradation kinetics Using Candida parapsilopsis. Braz Archives Biology Technology. 2010;53:481–486. doi: 10.1590/S1516-89132010000200029. - DOI

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