Wastewater treatment in the fishery industry

 

 

 

 

 

Table of Contents

FAO FISHERIES TECHNICAL PAPER - 355
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS

J.F. González
Department of Chemical Engineering
College of Engineering
National University of Mar del Plata
Mar del Plata, Agentina

FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS
Rome, 1996

The designations employed and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal status of any country territory city or area or of its authorities or concerning the delimitation of its frontiers or boundaries.

M-09
ISBN 92-5-103788-4

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© FAO 1996

This electronic document has been scanned using optical character recognition (OCR) software and careful manual recorrection. Even if the quality of digitalisation is high, the FAO declines all responsibility for any discrepancies that may exist between the present document and its original printed version.

TABLE OF CONTENTS

PRESENTATION

1. INTRODUCTION

2. WASTEWATER CHARACTERIZATION

2.1 Physicochemical. Parameters

2.1.1 pH
2.1.2 Solids content
2.1.3 Temperature
2.1.4 Odour

2.2 Organic Content

2.2.1 Biochemical oxygen demand
2.2.2 Chemical oxygen demand
2.2.3 Other methods for estimation of organic content
2.2.4 Relationships between estimates of the organic content
2.2.5 Oil and grease

2.3 Nitrogen and Phosphorous
2.4 Characteristics of Fish Processing Wastewaters
2.5 Sampling
2.6 Discharge Limits

3. PRIMARY TREATMENT

3.1 Screening
3.2 Sedimentation
3.3 Separation of Oil and Grease
3.4 Flotation

4. BIOLOGICAL TREATMENT

4.1 Aerobic Processes

4.1.1 Activated Sludge Systems
4.1.2 Aerated lagoons
4.1.3 Aeration
4.1.4 Trickling filters
4.1.5 Rotating biological contractors
4.1.6 Selection of aerobic treatments

4.2 Anaerobic Treatment

4.2.1 Digestion systems
4.2.2 Imhoff tanks

5. PHYSICO-CHEMICAL TREATMENTS

5.1 Coagulation - Flocculation
5.2 Disinfection

5.2.1 Chlorination
5.2.2 Ozonation

6. SLUDGE TREATMENT AND DISPOSAL

6.1 Sludge Transportation to Treatment Facilities
6.2 Sludge Digestion
6.3 Land Disposal of Sludges
6.4 Sludge Disinfection

7. ECONOMIC CONSIDERATION

7.1 Cost of Unitary Processes
7.2 Cost of Operation and Maintenance
7.3 Capital Costs
7.4 Estimation of Total Costs

8. REFERENCES