Characteristic of granulated activated sludge fed with glycerin fraction from biodiesel production
Agnieszka Cydzik-Kwiatkowska , Andrzej Białowiec , Irena Wojnowska-Baryła , Lech Smoczyński
In the presented research glycerin fraction from biodiesel industry was used for granulated aerobic activated sludge production in a typical sequencing batch reactor (h/d equal 2.1). After 7 weeks of operation, granulated activated sludge with SVI at the level of 40-50 cm3.g-1 was obtained. At organic compounds load of 1.43 ± 0.1 mg COD-mg VSS -1-d-1, the efficiency of carbon removal was 94.14 ± 2.7% and most of the introduced COD was removed during the first 2-3 hours of aeration. The sieve analysis revealed that 60% (w/w) of biomass consisted of particles with a diameter in the range of 4-8 mm. A free settling test procedure proved that granules with a diameter between 2-4 mm were numerically most abundant in biomass (32.3%) and that the settling volume, mass and Reynolds number values significantly (p < 0.05) increased parallel with increasing granule diameter. Adverse tendency was observed for the mean effective, buoyant density of a granule in a liquid. © Copyright by Institute of Envionmental Engineering of the Polish Academy of Sciences.
|Journal series||Archives of Environmental Protection, ISSN 2083-4772, [0324-8461], (B 10 pkt)|
|Keywords in English||Glycerin fraction from biodiesel production; granulated activated sludge; free settling test; waste treatment|
|Publication indicators||= 12; = 11; : 2009 = 0.162; : 2013 = 0.901 (2) - 2013=0.619 (5)|
|Citation count*||14 (2020-06-28)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.