Cheese whey anaerobic digestion — Effect of chemical flocculant addition

✍ Scribed by I. J. Callander; J. P. Barford

• Book ID: 104634416
• Publisher: Springer Netherlands
• Year: 1983
• Tongue: English
• Weight: 381 KB
• Volume: 5
• Category: Article
• ISSN: 0141-5492
• DOI: 10.1007/bf00131894

✦ Synopsis

Two stirred tank digesters were operated with biomass retention by internal settling during effluent removal. In one digester a flocculating agent was used to enhance microbial aggregation and settling. The unflocculated digester achieved a maximum stable loading rate of 8-8.5kg COD/ma. day and biomass density of 19.39 VSS/l compared to the flocculated digester which achieved a (non-maximal) stable loading rate of 12.3kg COD/m3. day and biomass density of 43.39 VSS/l. than 97%. Both digesters had a COD conversion efficiency greater Operation of a stirred tank digester in a mix/settle mode allows a significant increase in biomass levels over conventional continuously stirred digesters. The addition of a chemical flocculant significantly enhances this improvement.