The effect of the treatment process on nitrogen content in humic acids extracted from sewage sludge
2005
Polak, J.(University of Silesia, Katowice (Poland). Inst. of Chemistry. Dept. of Environmental Chemistry and Technology) | Sulkowski, W.W.(University of Silesia, Katowice (Poland). Inst. of Chemistry. Dept. of Environmental Chemistry and Technology)E-mail:[email protected]
Humic acids were extracted from sludge from three sewage treatment plants with different treatment technologies. Investigations of the extracted humic acids were carried out by means of elementary analysis and spectroscopic methods. Results of elementary analysis show that percentage content of nitrogen is different for humic acids extracted from sludge derived from the subsequent treatment stages. The influence of the treatment process on nitrogen content was also observed. The percentage content of nitrogen was of the range from 5.05% to 8.99%. The highest value of nitrogen for humic acids extracted from sludge was obtained from the nitrification and denitrification chamber.
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