The SBR process : an efficient and economical solution for depollution of the effluent produced by the gaseous drinks company of North-Fez (Morocco)

The treatment of agribusiness effluents in sequencing batch reactor (SBR) constitutes an alternating solution for these effluents treatment by an activated sludge process. The optimization of the treatment of the Gaseous drinks company of North Fez effluents is based on studying the effect of the following parameters on the SBR performance: duration of the SBR cycle, number of cycles per day, duration of ventilation, duration of the decanting and the C/N/P. A ventilation of 10 hours, presented an average performance of 52.3 % for the CODT, the effluent treatment by one cycle per day for a duration of ventilation of 22 hours, increased the purification yield. Elimination rate is 94.5 % for the CODT, 91 % for BOD5. Thus, SBR performance in terms of reduction of organic matter depends on the duration of settling. The treated effluent quality is improved while the duration of settling is increased. It could be concluded that improving the efficiency purification increases with increasing duration of venting and settling, and with decrease in the number of cycles per day. In addition, the correction of C/N/P with a ratio of 100/2.5/0.5 and with a settling time of 1 hour increases the elimination of CODT and BOD5 with rates of 95.5 % and 97 % respectively. For the theoretical ratio 100/5/1, purification yields of SBR increase and reach a maximum of 97 % for the CODT and 99 % for BOD5. Thus the treated effluent is respecting the standards of effluents rejection