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Prefermentation to overcome nutrient limitations in food processing wastewater: Comparison of pilot- and bench-scale systems

Paper ID Volume ID Publish Year Pages File Format Full-Text
4769 244 2007 10 PDF Available
Title
Prefermentation to overcome nutrient limitations in food processing wastewater: Comparison of pilot- and bench-scale systems
Abstract

A bench- and a pilot-scale anaerobic/aerobic system were evaluated for the treatment of high strength tomato-processing wastewater. The pilot-scale anaerobic tank achieved better prefermentation of organic carbon and nitrogen than the bench-scale system, although overall system performance was comparable with more than 99% SBOD removal and 97% SCOD removal. Hydraulic retention time (HRT) and temperature effects were studied in the bench-scale system. Increase of anaerobic HRT from 0.25 day to 0.5 day favored prefermentation and a better effluent quality was achieved, as demonstrated by reduction in TSS concentrations from 66 mg/L to 24 mg/L, SCOD from 103 mg/L to 78 mg/L and SBOD from 8 mg/L to 6 mg/L, respectively. Specific oxygen uptake rate (SOUR) increased from 0.15–0.23 mg O2/mg VSS day at 25 °C to 0.67–1.24 mg O2/mg VSS day at 32 °C. Settling characteristics deteriorated from sludge volume index (SVI) of 24–131 mL/g at 25 °C to 115–173 mL/g at 32 °C. Sludge yield decreased from 0.14 g VSS/g COD at 25 °C to 0.098 g VSS/g COD at 32 °C.

Keywords
Anaerobic/aerobic system; Tomato-processing wastewater; Prefermentation; HRT effect; Temperature effect
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Prefermentation to overcome nutrient limitations in food processing wastewater: Comparison of pilot- and bench-scale systems
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 33, Issue 1, January 2007, Pages 16–25
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us