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Laboratory Studies into the Reduction of Pollution From Poultry Processing by In-Plant Recycle LESTER S. BERRY, Graduate Student PATRICK F. LAFAYETTE, Graduate Student STANLEY W. REED, Graduate Student FRANKLIN E. WOODARD, Associate Professor Civil Engineering Department University of Maine Orono, Maine 04473 INTRODUCTION As the wastewater discharge limits imposed on polluting industries become more stringent, manufacturers must find new technology and process modifications to allow them to continue operation. The poultry processing industry is an example. Faced with the problem of continually upgrading the quality of its discharged wastewater, it must develop new concepts for wastewater treatment or in-plant water use. The proposed discharge limitations under the NPDES permit system for poultry processing plants are 0.40 pounds of BOD5 per 1,000 pounds of broilers processed and 0.62 pounds of suspended solids per 1,000 pounds of broilers processed. Slightly higher allowances are made for the processing of heavier birds, referred to as foul, amounting to 0.46 pounds of BOD5 and 0.62 pounds of suspended solids per 1,000 pounds of birds processed. These limitations amount to more than 98 percent removal of BOD. suspended solids and oil and grease for most poultry processing plants (I, 2, 3, 4). They were based on the performance of a wastewater treatment system in Florida which incorporated high detention time aerated lagoons and a polishing pond (4). This type of system is not a viable alternative for plants which have limited land area available to them or are located in a colder climate. The only means by which these plants can meet the proposed limitations are by the use of tertiary treatment, by conversion to "dry" processing methods, or by the in-plant recycle of water. The work reported on in this paper is the first phase of an on-going project directed toward determining the feasibility of in-plant wastewater treatment and recycle. The basic questions addressed are: Can poultry processing wastewater be treated sufficiently to allow its safe reuse? Is the treatment and reuse concept economically feasible? How does the cost of treatment and reuse of individual unit processing wastewaters compare to the cost of tertiary treatment of the combined plant wastewater flow? The approach taken to develop answers.to these questions was to study the treatability of both the total combined wastewater flow from a poultry processing operation as well as waste flows from certain individual unit processes within the plant. The treatment methods studied were of the physico-chemical type. Figure 1 presents a schematic of a typical poultry processing plant. Live birds are received, killed, bled, then immersed in a hot water bath called a scalder. They are then defeathered and washed, then eviscerated. Next, they are cooled in an icewater bath called a chiller, then packed for shipping or sent to "further processing." There are three major sources of wastewater; the scalder, the eviscera carriage flume and the chiller. Other wastewater sources result from feather carriage, bird washing, hand washing and plant washdown. 574
Object Description
Purdue Identification Number | ETRIWC197455 |
Title | Laboratory studies into the reduction of pollution from poultry processing by in-plant recycle |
Author |
Berry, Lester S. Lafayette, Patrick F. Reed, Stanley W. Woodard, Franklin Earl |
Date of Original | 1974 |
Conference Title | Proceedings of the 29th Industrial Waste Conference |
Conference Front Matter (copy and paste) | http://earchives.lib.purdue.edu/u?/engext,24462 |
Extent of Original | p. 574-588 |
Series | Engineering extension series no. 145 |
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 | 2009-06-05 |
Capture Device | Fujitsu fi-5650C |
Capture Details | ScandAll 21 |
Resolution | 300 ppi |
Color Depth | 8 bit |
Description
Title | page574 |
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 | Laboratory Studies into the Reduction of Pollution From Poultry Processing by In-Plant Recycle LESTER S. BERRY, Graduate Student PATRICK F. LAFAYETTE, Graduate Student STANLEY W. REED, Graduate Student FRANKLIN E. WOODARD, Associate Professor Civil Engineering Department University of Maine Orono, Maine 04473 INTRODUCTION As the wastewater discharge limits imposed on polluting industries become more stringent, manufacturers must find new technology and process modifications to allow them to continue operation. The poultry processing industry is an example. Faced with the problem of continually upgrading the quality of its discharged wastewater, it must develop new concepts for wastewater treatment or in-plant water use. The proposed discharge limitations under the NPDES permit system for poultry processing plants are 0.40 pounds of BOD5 per 1,000 pounds of broilers processed and 0.62 pounds of suspended solids per 1,000 pounds of broilers processed. Slightly higher allowances are made for the processing of heavier birds, referred to as foul, amounting to 0.46 pounds of BOD5 and 0.62 pounds of suspended solids per 1,000 pounds of birds processed. These limitations amount to more than 98 percent removal of BOD. suspended solids and oil and grease for most poultry processing plants (I, 2, 3, 4). They were based on the performance of a wastewater treatment system in Florida which incorporated high detention time aerated lagoons and a polishing pond (4). This type of system is not a viable alternative for plants which have limited land area available to them or are located in a colder climate. The only means by which these plants can meet the proposed limitations are by the use of tertiary treatment, by conversion to "dry" processing methods, or by the in-plant recycle of water. The work reported on in this paper is the first phase of an on-going project directed toward determining the feasibility of in-plant wastewater treatment and recycle. The basic questions addressed are: Can poultry processing wastewater be treated sufficiently to allow its safe reuse? Is the treatment and reuse concept economically feasible? How does the cost of treatment and reuse of individual unit processing wastewaters compare to the cost of tertiary treatment of the combined plant wastewater flow? The approach taken to develop answers.to these questions was to study the treatability of both the total combined wastewater flow from a poultry processing operation as well as waste flows from certain individual unit processes within the plant. The treatment methods studied were of the physico-chemical type. Figure 1 presents a schematic of a typical poultry processing plant. Live birds are received, killed, bled, then immersed in a hot water bath called a scalder. They are then defeathered and washed, then eviscerated. Next, they are cooled in an icewater bath called a chiller, then packed for shipping or sent to "further processing." There are three major sources of wastewater; the scalder, the eviscera carriage flume and the chiller. Other wastewater sources result from feather carriage, bird washing, hand washing and plant washdown. 574 |
Resolution | 300 ppi |
Color Depth | 8 bit |
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