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Biological treatment processes for fish processing wastewater--a review
Pankaj Chowdhury1, T Viraraghavan, A Srinivasan
1Faculty of Engineering, University of Regina, Regina, Saskatchewan, Canada.
Bioresource Technology
|September 16, 2009
Summary
Fish processing wastewater requires effective treatment due to high organic content. Biological methods, particularly anaerobic digestion followed by aerobic processes, efficiently remove organics and produce biogas.
Area of Science:
- Environmental Science
- Water Treatment Engineering
- Biotechnology
Background:
- Fish processing industries generate significant volumes of high-strength wastewater.
- Increasingly stringent global regulations necessitate advanced wastewater treatment solutions.
- Biological treatment methods are recognized as the most effective approach for this type of effluent.
Purpose of the Study:
- To evaluate biological treatment options for fish processing wastewater.
- To highlight the efficacy of anaerobic and aerobic processes.
- To propose an optimal treatment strategy.
Main Methods:
- Review of anaerobic processes: upflow anaerobic sludge blanket (UASB) reactor, anaerobic filter (AF), and anaerobic fluidized bed (AFB) reactor.
- Review of aerobic processes: activated sludge, rotating biological contactor, trickling filter, and lagoons.
- Assessment of combined anaerobic-aerobic treatment strategies.
Main Results:
- Anaerobic processes achieve high organic removal rates (80-90%) and produce biogas.
- Aerobic processes are also effective for organic matter reduction.
- A sequential anaerobic digestion followed by an aerobic treatment stage is identified as optimal.
Conclusions:
- Biological treatment is a viable and effective solution for fish processing wastewater.
- Combined anaerobic and aerobic treatment offers superior performance for high-strength organic effluents.
- This approach addresses regulatory concerns and promotes resource recovery (biogas).
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