Characterization of the Effluent and Effect of Minimization Techniques on the Cleaning Waste Stream
Author : Macarayo, Lillian Isabel Cunanan
Major Adviser : Luis Jr., Victor S.
Committee Members : Abrigo Jr., Casiano S.; Acda, Reynaldo
Year : 1994
Month : June
Type : Thesis
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The effluent generated by the abattoir of the Animal Development Center of the Bureau of Animal Industry was characterized in terms of volume, chemical demand (COD), total suspended solids (TSS), grease, PH, dissolved oxygen (DO), total dissolved solids total volatile solids (TVS), apparent and true color.
The abattoir effluent had the following characteristics on average per day operation: 3,123. 89 mg/L COD, 792.51 mg/L 482. 92 mg/L grease, pH of 7.04, temperature of 27.26°C rise of 5.54°C, 4.83 mg/L DO, 287.81 mg/L TDS, mg/L TVS, 5,439 PtCo apparent color and 1,876.67 PtCo color with a volume per day of 2,224.82 liters. The characteristics generated by the abattoir exceeded the standards set by Department of Environment and Natural (DENR) for Class C water.
Each of the different waste streams of the abattoir was characterized and evaluated according to its pollutional strength and volume on a one day operation basis equal to seven hog kills. The offal cleaning waste stream was found to be the major waste producing stream with a COD of 4, 250 mg/L, TSS of 1, 599.9 mg/L, grease content of 524.1 mg/L and volume of 719.8 liters.
Screening of solid waste generated during offal handling with proper housekeeping measures was employed as pollution minimization techniques. The water source was shut down when water was not in use. These techniques reduced COD, TSS, grease and volume by 65.27 percent, 96.31 percent, 91.74 percent and 50.80 percent, respectively.
The waste minimization effect on the overall waste stream reduced its COD by 28.73 percent, TSS by 62.90 percent, grease by 32.21 percent and volume by 16.44 percent. The reduction effort of the offal cleaning waste stream was found to be not enough to meet the effluent standards. More minimization techniques and treatments are required for the abattoir’s effluent to satisfy the Class C effluent standards.
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