Influence of the carbon source on the anaerobic biomass adhesion on polyurethane foam matrices

Ribeiro, Rogers; Varesche, Maria Bernadete Amâncio; Foresti, Eugênio; Zaiat, Marcelo

doi:10.1016/j.jenvman.2004.09.004

Cited by 31 publications

(21 citation statements)

References 30 publications

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“…They are also responsible for keeping cells together in the form of biofilms, flocs and sludges [10]. EPS plays a crucial role in creating proper initial conditions for microorganisms to adhere to the polyurethane (PU) surfaces and in speeding up the decolonization process [11]. Therefore, EPS is highly important in biological COD and color removal from dyeing wastewater, especially when the polymer carrier is used [7].…”

Section: Introductionmentioning

confidence: 99%

Application of A2O moving-bed biofilm reactors for textile dyeing wastewater treatment

Park

Bade

et al. 2010

Korean J. Chem. Eng.

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A three-stage pilot-scale moving-bed biofilm reactor (MBBRs, anaerobic-anaerobic-aerobic in series) was investigated to treat textile dyeing wastewater. Each reactor was filled with 20% (v/v) of polyurethane-activated carbon (PU-AC) carrier for biological treatment. To determine the optimum operating conditions of MBBRs, the effect of PU-AC carrier, its packing percentage (v/v%) and pH control on COD removal were analyzed by batch experiments. The MBBRs were inoculated with activated sludge obtained from a local dyeing wastewater treatment plant. The MBBR process removed 86% of COD and 50% of color (influent COD=608 mg/L and color=553 PtCo unit) using relatively low MLSS concentration (average 3,000 mg/L in biomass attached to PU-AC carrier) and hydraulic retention time (HRT=44 hr). The MBBR process showed a promising potential for dyeing wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Application of A2O moving-bed biofilm reactors for textile dyeing wastewater treatment

Park

Bade

et al. 2010

Korean J. Chem. Eng.

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“…Studying the influence of the substrate on the anaerobic biofilm formation on polyurethane foam matrices, Ribeiro (2001) observed that the extracellular polymer production was related with the source of the substrate. This author also stated that the production of extracellular polymers per volume of bed increased even when the retention of biomass remained constant, especially in the case of complex synthetic wastewater with protein, carbohydrate and lipids.…”

Section: Resultsmentioning

confidence: 99%

Morphological study of biomass during the start-up period of a fixed-bed anaerobic reactor treating domestic sewage

Lima¹,

Ribeiro

Foresti

et al. 2005

Braz. arch. biol. technol.

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“…In view of its relative superiority, isolate NMSN-1d was considered a promising strain and characterized further. It is considered that PU-attacking bacteria first bind to PU surfaces in the same way as biofilm-forming bacteria, thereby facilitating its bioavailability for further bacterial attack Ribeiro et al 2005). In this study a B. pumilus (NMSN-1d) was isolated from PU foam floating on water.…”

Section: Discussionmentioning

confidence: 99%

Molecular characterization of a lipase-producing Bacillus pumilus strain (NMSN-1d) utilizing colloidal water-dispersible polyurethane

Nair

Kumar

2007

World J Microbiol Biotechnol

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Bacillus pumilus strain NMSN-1d isolated from polyurethane-contaminated water was found to grow in high salt concentration (NaCl 10%, w/v) and degrade Impranil-DLN, water-dispersible polyurethane. The genetic relatedness of the isolate has been established by standard molecular biological techniques and the enzyme(s) involved in polyurethane degradation were also studied. A total of nine bacterial strains were isolated from polyurethane-polluted sites and characterized by conventional, microbiological and biochemical methods. These isolates were subjected to 16S ribosomal RNA gene amplification by PCR using specific primers. The genetic relatedness of the isolates was also ascertained by ribotyping and BLAST analysis of the 16S ribosomal RNA gene sequences. The bacterial isolates were grown in yeast extract-salts minimal broth medium supplemented with water-dispersible polyurethane (Impranil DLN) as a sole source of carbon. The promising isolate utilizing polyurethane and producing lipase was identified as Bacillus pumilus NMSN-1d. The polyurethane degradation has been studied in polyurethane-Rhodamine-B and Luria-Bertani-polyurethane plate assays. The activity of hydrolytic enzymes such as lipase and esterase was confirmed on 2xYT-olive oil and tributyrin-Tween 20 plate assay. The newly isolated Bacillus pumilus appears promising in the management of polyurethane waste and in production of industrially important enzymes.

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Influence of the carbon source on the anaerobic biomass adhesion on polyurethane foam matrices

Cited by 31 publications

References 30 publications

Application of A2O moving-bed biofilm reactors for textile dyeing wastewater treatment

Application of A2O moving-bed biofilm reactors for textile dyeing wastewater treatment

Morphological study of biomass during the start-up period of a fixed-bed anaerobic reactor treating domestic sewage

Molecular characterization of a lipase-producing Bacillus pumilus strain (NMSN-1d) utilizing colloidal water-dispersible polyurethane

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