Volume 15
Issue 1
Environmental Development
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume15/issue1/abs-06.html
LONG-TERM CULTIVATION OF AN AEROBIC GRANULAR ACTIVATED SLUDGE
Jakub Ku¶mierczak, Piotr Anielak, £ukasz Rajski
Institute of General and Ecological Chemistry, Technical University of £ód¼
ABSTRACT
Aerobic granules were cultivated in a sequencing batch reactor (SBR) fed with sucrose as a sole carbon source at superficial upflow air velocity of 1.9 cm/s and under an organic loading rate (OLR) of 2 g COD/L.d. This study shows that cultivated granules during 1 year were stable and had capability in simultaneous removal of carbon, nitrogen and phosphorus from wastewater. At a 6 h SBR cycle removal efficiency of chemical oxygen demand (COD), N-NH4+, P-PO43- were 93%, 66% and 83%, respectively. The value of sludge volume index (SVI) was between 90-110 mL/g and biomass concentration reached up to 8.0 g/L. With the granulation, the specific gravity and surface hydrophobicity of sludge increased and aerobic granules mean diameter was 4.9 mm.
Key words: sequencing batch reactor (SBR), microbial granules, nitrification, denitrification, microbial activity.
Jakub Ku¶mierczak
Institute of General and Ecological Chemistry, Technical University of £ód¼
¯eromskiego 116, 90-924 £ód¼, Poland
email: kubuss7@onet.eu
Piotr Anielak
Institute of General and Ecological Chemistry, Technical University of £ód¼
¯eromskiego 116, 90-924 £ód¼, Poland
£ukasz Rajski
Institute of General and Ecological Chemistry, Technical University of £ód¼
¯eromskiego 116, 90-924 £ód¼, Poland
Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.