Economic growth in Vietnam in the last few years has brought about an increasing demand for energy and has had a severe environmental impact. Fish processing is one of the fastest-growing industries that discharge organically-polluted wastewater. To counter these environmental problems, new technologies for energy-efficient treatment are needed. By coupling innovative nitrogen removal systems with anaerobic treatment processes, it is possible to realise such technologies. In the present project, a combined deammonification and anaerobic carbon removal system is presented. Special requirements to enable reliable treatment are discussed, taking industrial wastewater characteristics into consideration. To evaluate energetic efficiency, energy balance calculations based on data from a fish-processing factory are made. The determined specific energy consumption and production rates show that energy recovery is possible, even when COD and nitrogen removal efficiencies of over 90% are achieved. Depending on the pre-treatment employed, energy recovery rates ranging from 0.6 to 2.5 kWh/mt raw fish can be reached.
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Research Article|
July 01 2011
A new approach to energy-efficient treatment of wastewater produced by the fish industry in Vietnam
N. Trautmann;
N. Trautmann
1Institute for Water Quality and Waste Management, University of Hanover, Welfengarten 1, 30167 Hannover, Germany
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M. Beier;
1Institute for Water Quality and Waste Management, University of Hanover, Welfengarten 1, 30167 Hannover, Germany
E-mail: beier@isah.uni-hannover.de
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L.-C. Phan;
L.-C. Phan
2Emschergenossenschaft, Kronprinzenstraße 24, 45128 Essen, Germany
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K.-H. Rosenwinkel
K.-H. Rosenwinkel
1Institute for Water Quality and Waste Management, University of Hanover, Welfengarten 1, 30167 Hannover, Germany
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Water Sci Technol (2011) 64 (1): 279–285.
Article history
Received:
August 31 2010
Accepted:
November 12 2010
Citation
N. Trautmann, M. Beier, L.-C. Phan, K.-H. Rosenwinkel; A new approach to energy-efficient treatment of wastewater produced by the fish industry in Vietnam. Water Sci Technol 1 July 2011; 64 (1): 279–285. doi: https://doi.org/10.2166/wst.2011.471
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