Seite - 109 - in Intelligent Environments 2019 - Workshop Proceedings of the 15th International Conference on Intelligent Environments

Table 2. The times and dates of the sampling points Number of sampling points Sampling sites Sampling dates Hours of sampling Sampling points 1 Textile industry 26/04/2017 09 h 15 min External manhole 2 Vegetable fat 01 27/04/2017 15 h 25 min Global manhole inside the unit 3 Vegetable fat 02 02/05/2017 09 h 35 min Global manhole inside the unit 4 Poultry slaughterhouse 03/05/2017 10 h 45 min External manhole 5 slaughterhouse 06/05/2017 04 h 05 min External manhole 6 final save-all 06/05/2017 04 h 05 min manhole located at the subdivision level adjacent to the industrial zone Picture 1. Samples taken Picture 2. Sample preservation methods - Temperature determination: The temperature measurement was taken at the sampling point by the portable infrared thermometer. - pH determination: pH was measured by a portable pH meter in the laboratory. - Determination of conductivity: Conductivity was determined by a wtwcond 7110 conductivity meter in the laboratory. - Determination of turbidity: Turbidity was measured by a Turbidimeter of wtw Turbe 550 type in the laboratory. - Determination of suspended solids (MES): The sample is filtered through a 0.45 μm fiberglass filter using vacuum filtration equipment (see, picture 3). The filter is then dried at 105 ° C (see, picture 4) and the weight of the retained on the filter (suspended material) is determined by weighing according to the following formula: M.E.S (mg / l) = (P1-P2) x 1000000 / filtered volume, where P1 is vacuum filter weight in g and P2 is filter weight in full g. - Determination of biochemical oxygen demand (BOD5): • The sample is mixed. The pH of the sample must be between 6.5 and 8. Acid or base is added to the sample for pH verification if necessary. • The appropriate exact volume of the sample is poured into a BOD flask using an overflow flask or test tube: For manufacturers, to refer to the analysis history and choose the appropriate volume according to the table 3. K.Laaroussi etal. /PhysicochemicalCharacterizationTowardsSmartWaterManagement 109