Efficiency of a pilot scale trickling filter to treat industrial brewery wastewater: Influence of hydraulic loading

Autor: Haimanot Habte Lemji, Hartmut Eckstädt
In:

Journal of Chemical Technology and Biotechnology

Ergaenzung: online veröffentlicht DOI: 10.1002/jctb.4337
ISBN: Online ISSN: 1097-4660
Jahr: 2014

Einordung:
Institut: Professur Wasserwirtschaft

Abstract:
ABSTRACT
BACKGROUND

Despite sound technological improvements, huge water consumption and the associated wastewater discharge remain one of the major environmental challenges in the brewing industry. The aim of this study is therefore to investigate the performance of a mineral filled pilot scale trickling filter to treat brewery wastewater. A trickling filter is superior over the other conventional wastewater treatment processes in terms of cost and environmental friendliness therefore it is recommendable particularly for low income countries.

RESULTS

Pilot scale plant experiments were made to evaluate the trickling filter aerobic and anaerobic biofilm systems for removal of organics and nutrients from brewery wastewater at different hydraulic loading rates. The trickling filter had an average efficiency of (86.53), (95.25), (69.93 ) and (41.03)% for biochemical oxygen demand (COD), biological oxygen demand (BOD5), total nitrogen (TN) and total phosphorus (TP), respectively, as the flow rates changed from 900 to 1100 L day-1at an influent COD concentration of 600 mg L-1. A linear regression model revealed that there is very high correlations between mass loading rate and mass removal rate. The results of this study suggest that in addition to significant values for nutrient removal efficiencies, effluent value in the range 50 − 120 mg L-1 COD can be achieved using the trickling filter at the design hydraulic load and organic load of 8.36 m-3 m-2 day-1 and 0.75 k g m-3 d-1, respectively.

CONCLUSION

Organic substances and nutrients in brewery wastewater can be handled in a cost-effective and environmentally friendly manner using the gravel-filled trickling filter. © 2014 Society of Chemical Industry

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