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Section Six BIOLOGICAL: ANIMAL AND DAIRY WASTES 22 RECOVERY OF PROTEIN, FAT AND OIL FROM SLAUGHTERHOUSE PROCESS WATER WITH THE DISSOLVED AIR CONCENTRATION PROCESS Louis D. le Roux, Senior Sales Technologist Jelte Lanting, Technology Manager Biothane Corporation 2500 Broadway\Dwr # 5 Camden, New Jersey 08104 P. Borup Sorensen, President The Aminodan Group P.O. Box 43, Vestmole 1 DK-9990, Skagen, Denmark ABSTRACT This chapter discusses the Biothane-Aminodan (B-A) process which was developed for protein and fat recovery from slaughterhouse process water where the recovered product is used as animal feed. The basic principles and techniques involved in protein and fat coagulation and floccu- lation are discussed in relation to their removal with the dissolved air concentration system. Operating data of a full-scale protein, fat, and oil recovery installation at a poultry slaughterhouse is also presented. The B-A process uses FDA edible food approved additives for soluble protein and emulsified fat coagulation and flocculation, as compared to metal salt coagulants and acrylamide based floc- culants that are used in many dissolved air flotation systems for slaughterhouse wastewater treatment. The product recovered in the B-A system does not contain any toxic metal salts or cancer- causing acrylamide and can safely be rendered into animal feed. The B-A system uses dissolved air concentration (DAC®) water for protein and fat removal from process water. During DAC® water addition, many small, homogeneously sized air bubbles (=30 pm in diameter) are formed in the process water which attach to the floes. The air-floc particles have enough buoyancy to float to the surface of the concentrator. Only part of the recycled water stream is used as DAC® water, which results in substantial savings in system operating (energy) cost. Typically, the overall BOD removal efficiency of the B-A system varies between 70 and 85%. BOD removal efficiency is highest when process water soluble BOD consists mostly of proteins and fats. More than 95% total FOG and suspended solids are removed from process water. INTRODUCTION Food processing companies generate an estimated 18 million tons of organic waste each year.1 These wastes consist mostly of unused raw agricultural materials, fermentation and microbial residues, biosolids (biomass) and "float."2 Float, also known as skimmings, results from the physical/chemical removal of proteins and fats from food processing plant wastewater (process 52nd Purdue Industrial Waste Conference Proceedings. 1997, Ann Arbor Press, Chelsea, Michigan 48118. Printed in U.S.A. 215
Object Description
Purdue Identification Number | ETRIWC199722 |
Title | Recovery of protein, fat and oil from slaughterhouse process water with the dissolved air concentration process |
Author |
Le Roux, Louis D. Lanting, Jelte Sorensen, P. Borup |
Date of Original | 1997 |
Conference Title | Proceedings of the 52nd Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,20307 |
Extent of Original | p. 215-224 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Date Digitized | 2009-11-03 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page 215 |
Collection Title | Engineering Technical Reports Collection, Purdue University |
Repository | Purdue University Libraries |
Rights Statement | Digital object copyright Purdue University. All rights reserved. |
Language | eng |
Type (DCMI) | text |
Format | JP2 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Transcript | Section Six BIOLOGICAL: ANIMAL AND DAIRY WASTES 22 RECOVERY OF PROTEIN, FAT AND OIL FROM SLAUGHTERHOUSE PROCESS WATER WITH THE DISSOLVED AIR CONCENTRATION PROCESS Louis D. le Roux, Senior Sales Technologist Jelte Lanting, Technology Manager Biothane Corporation 2500 Broadway\Dwr # 5 Camden, New Jersey 08104 P. Borup Sorensen, President The Aminodan Group P.O. Box 43, Vestmole 1 DK-9990, Skagen, Denmark ABSTRACT This chapter discusses the Biothane-Aminodan (B-A) process which was developed for protein and fat recovery from slaughterhouse process water where the recovered product is used as animal feed. The basic principles and techniques involved in protein and fat coagulation and floccu- lation are discussed in relation to their removal with the dissolved air concentration system. Operating data of a full-scale protein, fat, and oil recovery installation at a poultry slaughterhouse is also presented. The B-A process uses FDA edible food approved additives for soluble protein and emulsified fat coagulation and flocculation, as compared to metal salt coagulants and acrylamide based floc- culants that are used in many dissolved air flotation systems for slaughterhouse wastewater treatment. The product recovered in the B-A system does not contain any toxic metal salts or cancer- causing acrylamide and can safely be rendered into animal feed. The B-A system uses dissolved air concentration (DAC®) water for protein and fat removal from process water. During DAC® water addition, many small, homogeneously sized air bubbles (=30 pm in diameter) are formed in the process water which attach to the floes. The air-floc particles have enough buoyancy to float to the surface of the concentrator. Only part of the recycled water stream is used as DAC® water, which results in substantial savings in system operating (energy) cost. Typically, the overall BOD removal efficiency of the B-A system varies between 70 and 85%. BOD removal efficiency is highest when process water soluble BOD consists mostly of proteins and fats. More than 95% total FOG and suspended solids are removed from process water. INTRODUCTION Food processing companies generate an estimated 18 million tons of organic waste each year.1 These wastes consist mostly of unused raw agricultural materials, fermentation and microbial residues, biosolids (biomass) and "float."2 Float, also known as skimmings, results from the physical/chemical removal of proteins and fats from food processing plant wastewater (process 52nd Purdue Industrial Waste Conference Proceedings. 1997, Ann Arbor Press, Chelsea, Michigan 48118. Printed in U.S.A. 215 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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