Decreasing of chemical oxygen demand in waste water from starch industry using microfiltration | Smanjenje hemijske potrošnje kiseonika u otpadnim vodama industrije skroba primenom mikrofiltracije
2010
Šaranović, Ž., Fidelinka AD, Subotica (Serbia). Fidelinka - Skrob | Šereš, Z., Tehnološki fakultet, Novi Sad (Serbia) | Sekulić, R., Fidelinka AD, Subotica (Serbia). Fidelinka - Skrob | Gyura, J., Tehnološki fakultet, Novi Sad (Serbia) | Dalmacija, B., Prirodno-matematički fakultet, Novi Sad (Serbia) | Pajin, B., Tehnološki fakultet, Novi Sad (Serbia)
New environmental regulations and the increasing market preference for companies that respect the ecosystem had encourage industry to look after new treatments for its effluents. The industry of starch follows this tendency. Membrane technology is convenient for separation of suspended solids, colloids and high molecular weight materials that are present. The idea is to microfilter the wastewater, where the permeate (clear, filtered water) passes trough the membrane and are available for recycle or for discharge to sewer, and the retenate with high starch content can be returned to the process to be dried in the centrifugal drier with the rest of the washed starch. For the microfiltration of this effluent a tubular membrane were used with a pore size of 0.2 micro m at transmembrane pressure in range of 1-3 bars and in range of flow rate of 50-150 L/h. Permeate dry matter content was reduced for 60% according to feed, wastewater. The flux achieved during the microfiltration was about 15.0 L/m2h when wastewater sedimentation of 4 h before microfiltration was included in treatment.
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