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AnSBBR Applied to a Personal Care Industry Wastewater Treatment: Effects of Fill Time, Volume Treated Per Cycle, and Organic Load

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Abstract

A study was performed regarding the effect of the relation between fill time, volume treated per cycle, and influent concentration at different applied organic loadings on the stability and efficiency of an anaerobic sequencing batch reactor containing immobilized biomass on polyurethane foam with recirculation of the liquid phase (AnSBBR) applied to the treatment of wastewater from a personal care industry. Total cycle length of the reactor was 8 h (480 min). Fill times were 10 min in the batch operation, 4 h in the fed-batch operation, and a 10-min batch followed by a 4-h fed batch in the mixed operation. Settling time was not necessary since the biomass was immobilized and decant time was 10 min. Volume of liquid medium in the reactor was 2.5 L, whereas volume treated per cycle ranged from 0.88 to 2.5 L in accordance with fill time. Influent concentration varied from 300 to 1,425 mg COD/L, resulting in an applied volumetric organic load of 0.9 and 1.5 g COD/L.d. Recirculation flow rate was 20 L/h, and the reactor was maintained at 30 °C. Values of organic matter removal efficiency of filtered effluent samples were below 71% in the batch operations and above 74% in the operations of fed batch followed by batch. Feeding wastewater during part of the operational cycle was beneficial to the system, as it resulted in indirect control over the conversion of substrate into intermediates that would negatively interfere with the biochemical reactions regarding the degradation of organic matter. As a result, the average substrate consumption increased, leading to higher organic removal efficiencies in the fed-batch operations.

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Abbreviations

A:

inner cross-section area of the reactor, cm2

BA:

bicarbonate alkalinity, mg CaCO3/L

TVA:

total volatile acids concentration, mg HAc/L

CI :

influent organic matter concentration, mg COD/L

CEF :

organic matter concentration of filtered effluent samples, mg COD/L

CET :

organic matter concentration of unfiltered effluent samples, mg COD/L

CH4 :

methane concentration, mmol/L

CO2 :

carbon gas concentration, mmol/L

CS :

organic matter concentration of filtered samples, mg COD/L

CX :

biomass concentration in the reactor (solids per liquid volume treated per cycle), g TVS/L

C’X :

biomass concentration in the reactor (solids per mass of inert support), g TVS/g-foam

RSOLF :

removed specific organic load for filtered effluent samples, mg COD/g TVS.d

RSOLT :

removed specific organic load for unfiltered effluent samples, mg COD/g TVS.d

AVOL:

applied volumetric organic load, mg COD/L.d

RVOLF :

removed volumetric organic load for filtered effluent samples, mg COD/L.d

RVOLT :

removed volumetric organic load for unfiltered effluent samples, mg COD/L.d

MTVS :

total mass of total volatile solids, g TVS

Q:

recirculation flow rate, L/h

TSS:

concentration of total suspended solids, mg/L

VSS:

concentration of volatile suspended solids, mg/L

TS:

concentration of total solids, mg/L

TVS:

concentration of total volatile solids, mg/L

tB :

batch fill time, min

tFB :

fed-batch fill time, h

tC :

cycle length, h

VI :

total influent volume, L

VB :

batch influent volume, L

VFB :

fed-batch influent volume, L

VRT :

volume of liquid medium in the reactor, L

VRS :

volume of liquid medium in the reservoir, L

X:

biomass amount in the reactor, g TVS

vS :

superficial velocity of the liquid medium, cm/s

VU :

volume of liquid medium in the system, L

εF :

organic matter removal efficiency of filtered effluent samples, %

εT :

organic matter removal efficiency of unfiltered effluent samples, %

φ:

bed porosity, %

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Acknowledgments

This work was supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo (FPAESP)—processes 05/51.702-9 and 06/58.681-0. We gratefully acknowledge Dr. Baltus C. Bonse for the revision of this paper.

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Authors and Affiliations

  1. Escola de Engenharia Mauá (EEM), Instituto Mauá de Tecnologia (IMT), Praça Mauá 1, CEP 09.580-900, São Caetano do Sul, São Paulo, Brazil

    José Alberto Domingues Rodrigues, Ricardo Polisaitis Oliveira & Suzana Maria Ratusznei

  2. Departamento de Hidráulica e Saneamento (SHS), Escola de Engenharia de São Carlos (EESC), Universidade de São Paulo (USP), Av. Trabalhador São-Carlense 400, CEP 13.566-590, São Carlos, São Paulo, Brazil

    Marcelo Zaiat & Eugenio Foresti

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  1. José Alberto Domingues Rodrigues
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  2. Ricardo Polisaitis Oliveira
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  3. Suzana Maria Ratusznei
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  4. Marcelo Zaiat
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  5. Eugenio Foresti
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Correspondence to José Alberto Domingues Rodrigues.

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Rodrigues, J.A.D., Oliveira, R.P., Ratusznei, S.M. et al. AnSBBR Applied to a Personal Care Industry Wastewater Treatment: Effects of Fill Time, Volume Treated Per Cycle, and Organic Load. Appl Biochem Biotechnol 163, 127–142 (2011). https://doi.org/10.1007/s12010-010-9022-0

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