Laboratoire d'Ecologie et d'Environnement (LEE), Université Hassan II-Casablanca, Faculté des Sciences Ben M'sik, BP 7955-Sidi Othman, Casablanca, Maroc
Hassar stream is a watercourse of North East of Casablanca suburban which is a tributary of Mellah river. Until the end of 2012, Hassar stream received wastewater in crude state from Mediouna town causing a degradation of it ecological status and adverse effects on the local population. This work aims to make a first assessment of physicochemical water quality of this watercourse after installing the Mediouna StEp started in 2013. The first results recorded during the first six months of the study (November 2013 to April 2014) shows an improvement in the quality of Hassar stream with dissolved O2 values reaching up to 8,26 mg/l, COD maximum not exceeding 80 mg/l, a maximum BOD5 of 14 mg/l, a maximum content of MES 30 mg/l, ammonium ion (NH4+) in concentrations of 0,9 to 7,8 mg / l, orthophosphates from 0,48 to 11,62 mg/l and nitrates from 4,7 to 25,3 mg/l. These results show that the majority of the stations of the Hassar stream have an average to good quality and the beginning of physicochemical resilience of Hassar stream's waters would be initiated.
The platform of the airport Mohamed V in Casablanca constitutes a showpiece of the development in the area of Nouaceur because of its socio-economic role related on the air traffic and the industrial and commercial activities installed in the "a
The increase of activity in the food industries is often accompanied by higher emissions of wastewater. Due to Moroccan discharge standards a treatment is mandatory for direct or indirect discharge. This study evaluates the treatment performance of a sequential batch reactor (SBR) set up by a Moroccan food industry company (Naturex Morocco). The results obtained during the second year of operation of the system shows that the elimination rates reach 98% for COD, 99% for BOD5, 74% for TSS and 68% for total nitrogen. The effluent complies with Moroccan standards for indirect discharge. However, the treated water has some color substances (probably vegetable tannins) which would require additional treatment.
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