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Abstract
The meat processing industry produces large volumes of slaughterhouse wastewater (SWW). For this reason, water and wastewater treatment has become crucial for the continuing development of the society. The present study reveals the water pollution degree from poultry and the swine slaughterhouses from Bacau (Romania). The possibility of reducing the quantity of pollutants by the active sludge treatment method is also presented. The efficiency of this treatment processes was evaluated through the following parameters: biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total suspended solids (TSS), turbidity, both before and after the active sludge treatment.
Highlights
Wastewater from the meat processing industry is formed at slaughterhouses, meat processing plants and cattle and poultry farms, and is an important source of surface water pollution
This paper presents the study of the water pollution degree from poultry and the swine slaughterhouses as well as the possibility of reducing the quantity of pollutants by the activated-sludge treatment method [9, 11]
The chemical oxygen demand (COD) test applied consisted in the ability of potassium permanganate to oxidize organic substances from water in acid condition, and excess permanganate is determined with oxalic acid
Summary
Wastewater from the meat processing industry is formed at slaughterhouses, meat processing plants and cattle and poultry farms, and is an important source of surface water pollution. According to statistical data from literature [1,2,3], the meat processing industry is one of the major consumers of freshwater among food and beverage processing facilities, which makes slaughterhouses a significant producer of wastewater effluents. A slaughterhouse plant that may consume between 2.5 and 40 m3 of water per metric tons of meat produced [1]. This wastewater is considered with potentially highly detrimental effects for environment due to its complex composition of fats, proteins, and fibers from the slaughtering process. Waste water resulting from the slaughter of pigs has a high fat content and coarse matter, so they are separated before biological treatment with active sludge. This paper presents the study of the water pollution degree from poultry and the swine slaughterhouses as well as the possibility of reducing the quantity of pollutants by the activated-sludge treatment method [9, 11]
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