The Treatment of Effluent from Food Industry Using Anaerobic-Aerobic Process with MBR system

AL-Saadi Anmar Joudah, Gabriel Racoviteanu

Wastewater treatment of the food industry by using a combination of the anaerobic-aerobic process as a pre-treatment and the bioreactor treatment represented by MBR system has been proven as an efficient single step process to treat industrial wastewater and produced an excellent effluents quality suitable for reuse. In this study, three phases of anaerobic biodegradation were used as the first step of biological pre-treatment, with the time of fermentation 5, 10 and 15 days respectively. At each phase, the aerobic biodegradation process was performed to activate sludge at periods of 2, 4, 8, and 24 hours, respectively, with the MBR system using hollow fibre membrane type ZW-10 that's operating under a low-vacuum. NaOCl solution has been adding in the bioreactor tank during the backwashing process.  Twenty-eight of samples were collected from the influents and the effluents during the biological and bioreactor treatments. The samples were tested for eight water quality tests: temperature, Dissolved Oxygen (DO), pH, Turbidity, Total Suspended Solids (TSS), Mixed Liquor Suspended Solids (MLSS), Chemical Oxygen Demand (COD), and Biochemical Oxygen Demand (BOD5). The results indicated that the bioreactor system can be used efficiently to treat the effluent of food industry from meat processing. The results of the first phase PI (after 5 days of fermentation) considered as the best phase, which provided the excellent removal efficiency of TSS, BOD₅, and COD to reached 98.31%, 94.53%, and 95.56% respectively at HRT 24 h.

https://dx.doi.org/10.31873/IJEAS.6.2.01