Characterisation of aerobic bio treatment of meat plant effluent
Thayalakumaran, N.; Bhamidimarri, R.; Bickers, P.O.
Water Science and Technology a Journal of the International Association on Water Pollution Research 48(8): 53-60
2003
ISSN/ISBN: 0273-1223 PMID: 14682570 Document Number: 556217
Primary treated meat processing plant effluent of Manawattu Beef Packers in Fielding, New Zealand was characterized for the calibration of the Activated Sludge Model 2. The total chemical oxygen demand (COD) of the waste water was 500-2000 mg litre-1. The waste water contained 15-18% of readily biodegradable chemical oxygen demand (RBCOD). RBCOD of the meat processing waste water was from short chain fatty acids (SCFA). Acetic and iso-valeric acids contributed 50% of the total SCFA COD. The inert soluble and particulate COD fractions were each 4%. The COD exerted by carbohydrate was 5% of the total COD. Fat and protein contributed 51 and 44% of the total COD of the waste water, respectively. The average concentrations of ammonia, total phosphorus, total suspended solids and alkalinity were 75, 34, 450 and 275 mg litre-1 CaCO3, respectively. Maximum specific growth rates of heterotrophs and autotrophs were between 1.2-2.5 and 0.65-0.8 day-1. The heterotrophs yield coefficient was 0.63 on a COD basis.