Pilot-scale demonstration of pre-fermentation for enhancement of food-processing wastewater biodegradability

✍ Scribed by Zhongda Xu; George Nakhla

• Publisher: Wiley (John Wiley & Sons)
• Year: 2006
• Tongue: English
• Weight: 166 KB
• Volume: 81
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1432

✦ Synopsis

Abstract

A pilot‐scale anaerobic/aerobic ultrafiltration system was tested to treat high‐strength tomato‐processing wastewater, to achieve stringent dry‐ditch discharge criteria of soluble biochemical oxygen demand (SBOD) <10 mg dm^−3^, total suspended solids <10 mg dm^−3^, ammonia nitrogen <3 mg dm^−3^ and soluble phosphorus <0.5 mg dm^−3^. The anaerobic/aerobic system achieved 99.4% SBOD removal, 91.9% NH~3~ N removal and 100% phosphorus removal at an overall hydraulic retention time of 1.5 days and solids retention time of 5 days during the tomato canning season. Respirometric studies confirmed that the pretreatment of tomato‐processing wastewater in the anaerobic reactor increased the readily biodegradable fraction, improved kinetics, and eliminated nutrient deficiency problem. Copyright © 2006 Society of Chemical Industry