International audienceIn order to preserve the quality of our environment and public health, regulatory treatment of pollutants is constantly changing to more restrictive standards. Thus, the problem of organic pollutants has emerged as a major issue in the treatment of industrial wastewater (ERI). The objective of this work was the evaluation of the above organic pollution load of wastewater from some industrial sites in the city of Ouargla (Algeria). The water samples were collected from seven different sites, hospital, washing stations, a slaughterhouse and a processing plastic plant. The physico-chemical characterization of raw sewage revealed that these releases are loaded with organic matter in terms of COD (153.6 to 36120 mg/L) BOD5 (100 to 4700 mg/L) TSS (29 to 14702 mg/L). For the majority of the studied parameters, Algerian industrial waste often exceeded the required standards, since wastewater has a high organic load (BOD5/COD = 0.012 to 0.45 and TSS/BOD5 = 0.2625 to 73.51, COD/BOD5 = 2.23 to about 80000), showing in most cases poor biodegradability

International audienceIn the interests of preserving our environment from all forms of pollution, we have undertaken a series of studies of purification of sewage based on the phenomenon of biological filtration. In this work, we have made a comparative study between two types of granular materials by filtration, the (artificial) crushed glass and sand dunes (natural). These two materials are using as filter media on columns to a height of 60 cm. The effectiveness of this model is essentially assessed through indicators parameters of organic pollution chemical oxygen demand (COD) and the biochemical oxygen demand (BOD5). The results obtained showed a removal of oxidizable organic matter at 93.24%, and biodegradable surroundings 98.93%. These results are very interesting and satisfactory at several levels including in terms of safeguarding our ecosystem of some pollutant nuisances and especially by the exploitation of natural resources or recycling of glass released into natur