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A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

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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.

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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).