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Table 4 Classification of contaminants and cleaning procedures (from DSM, 2019) [30]

From: The multiplicity of halal standards: a case study of application to slaughterhouses

  Degree of severity of contamination
Light (Mukhaffafah) Medium (Mutawassitah) Severe (Mughallazah)
Type of contaminant This category includes exclusively urine of babies less than two years old who have not consumed any other food except his mother’s milk Contaminants not included in the other two categories, such as tools or food products that are non-halal
This category includes also vomit, pus, blood, khamar, carrions, liquid and objects discharged from the orifices of humans or animals
Dogs and pigs (khinzir) including any liquid and objects discharged from their orifices, descendants and derivatives
Cleaning procedure Remove the contaminant and sprinkle water over the contaminated area Remove the contaminant and wash with running water until odor or visible traces of contaminant disappear Remove the contaminant and wash seven times with running water, one of which shall be with water mixed with soil.
The first wash shall clear the najs. The water from first cleaning shall not remain behind and the successive wash shall be counted as the second wash.
The amount of soil used is just enough to make a suspension.