کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
151931 | 456483 | 2010 | 7 صفحه PDF | دانلود رایگان |
Laboratory scale pressure-driven electro-dewatering reactor was set up to study the effect of polyelectrolyte addition and freeze/thaw conditions on solid content in the final sludge cake at different sludge loading rates. An increase in freezing temperature and extended natural freezing periods resulted in a significant increase in sludge dewatering ability. However, dry solid (DS) content in the final sludge cake after electro-dewatering was similar (39.3–41.5%) regardless the experimental strategies. The reduction in sludge loading rate from 20 to 3 kg DS/m2 resulted in the increase in DS content of the final sludge cake (35.8–48.7%) using both, the polyelectrolyte addition and freezing condition sludge samples. During electro-dewatering using sludge amended with polymers, the DS content in the final sludge cake by the anode and the cathode was similar or a bit higher at the cathode either at high sludge loading or using high amount of polymers. It was found that polymer addition had a negative effect on the electro-osmotic flow.
Journal: Chemical Engineering Journal - Volume 164, Issue 1, 15 October 2010, Pages 85–91