9420.pdf

More documents

Recommendations

Info

offal with wastewater, which is the predominant offal disposal method in ‘Alaska, to fine screening, and the use of dissolved air flotation in one plant in Newport, Oregon (see Section 5.3.3). The level of treatment implemented depends to a large extent on the location of the plant. The level of treatment at B.C. fish processing plants is generally superior to that practised in Alaska and equal to that practised in Washington and Oregon. Only three processing plants grind and discharge their offal in B. C.. A flow diagram of a typical waste treatment scenario is shown in Figure 5.4. Most fish processing plants in Northern Europe screen their effluent prior to discharge to . the municipal sewer or to a receiving water body. Screen mesh sizes vary from 40 to 5000 um. The end of pipe treatment is not widely implemented and it appears to be generally preceded by completion of an in-plant water reduction program which lasts several years. End of pipe treatment typically involves a dissolved air flotation unit with or without chemical addition. Only one facility has biological treatment (NovaTec, 1993a). Generally, wastewater is generated at fish processing facilities from a variety of processes, such as: Intermediate fish storage; Fish cleaning; Fish transport (for example in wet pumps and fluming); Fish freezing; Fish thawing; Preparation of brines; ‘ Equipment sprays; Offal transport; Cooling water; Steam generation; and Equipment and floor cleaning. Most of these uses have been addressed in Section 4 and are inherently connected to the particular type of fish processing taking place at individual facilities, such as the use of cooling water for salmon canning. In addition to these applications, water is also used to flush offal and blood from equipment and floors, and to transport or flume the offal to floor drains and collections sumps. Department of Fisheries and Oceans Fish Inspection Regulations require that all conveyor belts be equipped with water sprays, and automated processing equipment generally have permanently installed water sprays to keep the 51 I
PROCESS WATER AND OFFAL ~ ~NQ WATER) I * COLLECTION SUMP 4 A SEEPAGE v # REMOVAL OF LARGE OFFAL BY COARSE SCREENING OFFAL * OFFAL HOPPER OFFAL I SEEPAGE \ v REMOVAL OF SOLIDS BY FINE SCREENING SCREENINGS b COLLECTION BIN SCREENINGS v DISCHARGE SCREENED ‘ EFFLUENT \ FIGURE 5.4 TYPICAL WASTE TREATMENT SCENARIO “H A
Page 2 and 3:
Environment Canada Industrial Progr
Page 4 and 5:
ACKNOWLEDGEMENTS This document was
Page 6 and 7:
TABLE OF CONTENTS ACKNOWLEDGEM’EN
Page 8 and 9:
5.4 5.5 BEST 6.1 6.2 6.3 5.3.4.2 Ot
Page 10 and 11:
Figure 2.1 Figure 2.2 Figure 2.3 Fi
Page 12 and 13:
Table 5.8 Table 5.9 Table 5.10 Tabl
Page 14 and 15: 1 INTRODUCTION 1.1 Terms of Referen
Page 16 and 17: 2 BACKGROUND INFORMATION 2.1 Genera
Page 18 and 19: 1992a). In 1990, approximately 70 %
Page 20 and 21: Development of aquiculture (husband
Page 22 and 23: REDUCTION PLANT Q \ \ PRINCE RUPERT
Page 24 and 25: 2.4 Review of Current Regulations 2
Page 26 and 27: 2.4.3 Municipal and Regional Bylaws
Page 28 and 29: Table 3.1 Water Consumption Rates -
Page 30: 3.2 Wastewater Characteristics 3.2.
Page 33 and 34: Table 3.4 Contaminant Concentration
Page 35 and 36: 3.2.2 Fish Processing Facilities in
Page 37 and 38: Table 3.7 Production-based Contamin
Page 39 and 40: which are permitted to grind and di
Page 41 and 42: 4 PROCESSING TECHNOLOGY The five ma
Page 43 and 44: ---- ,,, ,,, > “\ - Y’ I r ----
Page 45 and 46: VESSEL-HOLD WATER PACKERS AND RECIR
Page 47 and 48: && a- * I ---- ————-— --
Page 49 and 50: 4.4 Herring Processing 4.4.1 Genera
Page 51 and 52: Raw shrimp are held on ice for abou
Page 53 and 54: ~ PRODUCT — WASTEWATER ----- WATE
Page 55 and 56: -+ \ /’WATER’l \~uPPLY/ ‘T-
Page 57 and 58: 5 WATER AND WASTE MANAGEMENT 5.1 Cu
Page 59 and 60: Information Grind and Discha Coarse
Page 61: Table 5.1 Permit Summary ———-
Page 66 and 67: equipment clean and to flush offal
Page 68 and 69: Table 5.4 Solid Waste Generation at
Page 70 and 71: process water. However, different r
Page 72 and 73: 5.2.4 Contaminant Reduction Several
Page 74 and 75: Fine screening is generally used as
Page 76 and 77: to coagulate proteins, cooling and
Page 78 and 79: Table 5.6 Summary of FM Proceeding
Page 80 and 81: 5.3.4.3 Enhanced Gravity Settling T
Page 82 and 83: To the knowledge of the authors, on
Page 84 and 85: To the knowledge of the authors, no
Page 86 and 87: 5.3.6.2 Hydrocyclones Hydrocyclones
Page 88 and 89: Solid wastes generated by seafood p
Page 90 and 91: Table 5.10 Results of Applications
Page 92 and 93: 5.4.9 Bone Meal Experiment conducte
Page 94 and 95: The comporting operation consists o
Page 96 and 97: ● ● ● ● ● ● ● ● ●
Page 98 and 99: ● / use of finer mesh screens (do
Page 100 and 101: 7 ECONOMIC ANALYSIS 7.1 Review of t
Page 102 and 103: wholesale and landed values as a me
Page 104 and 105: 7.2 Processing Technology Treatment
Page 106 and 107: (~nuJ!WU Jo %) SONICINVl u) (9 I <
Page 108 and 109: conservation and the implementation
Page 110 and 111: In-house modifications can result i
Page 112 and 113: Table 7.3 Expected Efficiency of Wa
Page 114 and 115:
Table 7.4 Assumptions used for Econ
Page 116 and 117:
quo had been maintained. For each t
Page 118 and 119:
All cost estimates involving DAF un
Page 120 and 121:
meet toxicity limits. However, biol
Page 122 and 123:
BIBLIOGRAPHY Aegis Management Servi
Page 124 and 125:
Fukuda H. and H. Nakatani. Treatmen
Page 126 and 127:
Johnson R.A. and S.M. Gallanger. Us
Page 128 and 129:
NovaTec Consultants Inc.. Village o
Page 130:
( Takei M.. Treatment of Waste Wate
show all

9420.pdf

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?