Treatment of Domestic Sewage in Horizontal-Flow Anaerobic Immobilized Biomass (HAIB) Reactor

Zaiat, Marcelo; Passig, Fernando Hermes; Foresti, Eugênio

doi:10.1080/09593330.2000.9619000

Cited by 17 publications

(16 citation statements)

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“…The maximum percentage of reduction for all the parameters was shown in Table IIa. Zaiat et al (2000) developed a new reactor configuration, the horizontal-flow anaerobic immobilized-biomass (HAIB) reactor utilizing polyurethane foam matrices for biomass immobilization.…”

Section: Effect Of Inert Substrate Concentration (Puf)mentioning

confidence: 99%

Biodecolorization and Bioremediation of Denim Industrial Wastewater by Adapted Bacterial Consortium Immobilized on Inert Polyurethane Foam (PUF) Matrix: A First Approach with Biobarrier Model

Rajendran¹,

Prabhavathi²,

Karthiksundaram³

et al. 2015

Pol J Microbiol

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A b s t r a c tThe present experiments were studied on bioremediation of denim industry wastewater by using polyurethane foam (PU foam) immobilized bacterial cells. About 30 indigenous adapted bacterial strains were isolated from denim textile effluent out of which only four isolates were found to be efficient against crude indigo carmine degradation using broth decolorization method. The selected bacterial strains were identified as Actinomyces sp., (PK07), Pseudomonas sp., (PK18), Stenotrophomonas sp., (PK23) and Staphylococcus sp., (PK28) based on microscopic and biochemical characteristics. The bacterial immobilized cells have the highest number of viable cells (PK07, PK18, PK23 and PK28 appeared to be 1 × 10 8 , 1 × 10 9 , 1 × 10 6 and 1 × 10 7 CFU/ml respectively) and maximum attachment efficiency of 92% on PU foam. The complete degradation using a consortium of PU foam immobilized cells was achieved at pH 6, 27°C, 100% of substrate concentration and allowed to develop biofilm for one day (1.5% W/V). In SEM analysis, it was found that immobilization of bacterial cells using PUF stably maintained the production of various extracellular enzymes at levels higher than achieved with suspended forms. Finally, isatin and anthranilic acid were found to be degradation products by NMR and TLC. The decolorized dye was not toxic to monkey kidney cell (HBL 100) at a concentration of 50 µl and 95% of cell viability was retained. A mathematical model that describes bacterial transport with biodegradation involves a set of coupled reaction equations with non-standard numerical approach based on the time step scheme. K e y w o r d s: biobarrier model, bioflim, bioremediation, cytotoxicity test, polyurethane foam, secondary metabolites

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Section: Effect Of Inert Substrate Concentration (Puf)mentioning

confidence: 99%

Biodecolorization and Bioremediation of Denim Industrial Wastewater by Adapted Bacterial Consortium Immobilized on Inert Polyurethane Foam (PUF) Matrix: A First Approach with Biobarrier Model

Rajendran¹,

Prabhavathi²,

Karthiksundaram³

et al. 2015

Pol J Microbiol

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“…Alternatively to two-stage or CEPT units, the adoption of screens to reduce the size of influent particulate matter (suspended solids) has been used (mainly in lab-scale and pilot plants) for the removal of a fraction of suspended solids that interfere in the operation of pumps and other equipments (Zaiat et al 2000). Nevertheless, even pre-screened sewage contains a substantial fraction of suspended solids and fatty matter.…”

Section: Forced Screeningmentioning

confidence: 99%

“…The suspended solids correspond to about 50% of the total chemical oxygen demand (COD) of sewage, making hydrolysis the limiting step. Therefore, some anaerobic reactor configurations successfully applied for industrial wastewater treatment may not be applied to raw sewage treatment, as the suspended solids in sewage clog fixed beds (Zaiat et al 2000;Jawed & Tare 2000), or they cannot be properly retained (and therefore digested) in anaerobic reactors operated at high up-flow velocities (Mahmoud et al 2003).…”

Section: The Emergence Of Anaerobic Process For Domestic Sewage Treatmentioning

confidence: 99%

Anaerobic Processes as the Core Technology for Sustainable Domestic Wastewater Treatment: Consolidated Applications, New Trends, Perspectives, and Challenges

Foresti

Zaiat

Vallero

2006

Rev Environ Sci Biotechnol

179

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Anaerobic digesters have been responsible for the removal of large fraction of organic matter (mineralization of waste sludge) in conventional aerobic sewage treatment plants since the early years of domestic sewage treatment (DST). Attention on the anaerobic technology for improving the sustainability of sewage treatment has been paid mainly after the energy crisis in the 1970s. The successful use of anaerobic reactors (especially up-flow anaerobic sludge blanket (UASB) reactors) for the treatment of raw domestic sewage in tropical and sub-tropical regions (where ambient temperatures are not restrictive for anaerobic digestion) opened the opportunity to substitute the aerobic processes for the anaerobic technology in removal of the influent organic matter. Despite the success, effluents from anaerobic reactors treating domestic sewage require post-treatment in order to achieve the emission standards prevailing in most countries. Initially, the composition of this effluent rich in reduced compounds has required the adoption of post-treatment (mainly aerobic) systems able to remove the undesirable constituents. Currently, however, a wealth of information obtained on biological and physical-chemical processes related to the recovery or removal of nitrogen, phosphorus and sulfur compounds creates the opportunity for new treatment systems. The design of DST plant with the anaerobic reactor as core unit coupled to the pre-and post-treatment systems in order to promote the recovery of resources and the polishing of effluent quality can improve the sustainability of treatment systems. This paper presents a broader view on the possible applications of anaerobic treatment systems not only for organic matter removal but also for resources recovery aiming at the improvement of the sustainability of DST.

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“…However, although this support material provides a suitable environment for the adhesion of a mixed consortium of anaerobic microorganisms, its application in fullscale fixed-bed reactors must be carefully investigated, since it is a compressible material and the accumulation of solids or polymeric substances in the interstices of the bed can seriously impair the flow pattern in the reactor. Hydrodynamic problems were detected by Zaiat et al (2000) in a fixed-bed reactor, the horizontalflow anaerobic immobilized-biomass (HAIB) reactor filled with polyurethane foam, after only 15 weeks of operation treating domestic sewage at 25°C and 2 kg.m -3 .day -1 . Although partial bed clogging was observed, the reactor's performance was not affected, since a back-washing procedure was applied in the bed.…”

Section: Introductionmentioning

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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Treatment of Domestic Sewage in Horizontal-Flow Anaerobic Immobilized Biomass (HAIB) Reactor

Cited by 17 publications

References 0 publications

Biodecolorization and Bioremediation of Denim Industrial Wastewater by Adapted Bacterial Consortium Immobilized on Inert Polyurethane Foam (PUF) Matrix: A First Approach with Biobarrier Model

Biodecolorization and Bioremediation of Denim Industrial Wastewater by Adapted Bacterial Consortium Immobilized on Inert Polyurethane Foam (PUF) Matrix: A First Approach with Biobarrier Model

Anaerobic Processes as the Core Technology for Sustainable Domestic Wastewater Treatment: Consolidated Applications, New Trends, Perspectives, and Challenges

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

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