Changes in the C:N Ratio in the Sludge Treated with Natural Methods
 
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Department of Technology in Environmental Engineering, Bialystok University of Technology, ul. Wiejska 45E, 15-351 Białystok, Poland
AUTOR DO KORESPONDENCJI
Józefa Wiater   

Department of Technology in Environmental Engineering, Bialystok University of Technology, ul. Wiejska 45E, 15-351 Białystok, Poland
Data publikacji: 01-07-2020
 
J. Ecol. Eng. 2020; 21(5):240–245
 
SŁOWA KLUCZOWE
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STRESZCZENIE ARTYKUŁU
The aim of the study was to evaluate changes in the carbon/nitrogen ratio as a result of different natural methods of sewage sludge treatment from two municipal wastewater treatment plants. Sludge from the first treatment plant was poured into two lagoons, one covered with reed and the other with willow and a field with Californian earthworms. The sludge from the second treatment plant was composted with sawdust. The sludge processed by each method was simultaneously subjected to Effective Microorganisms. Samples of processed sludge from both treatment plants were collected three times. In the first one, after five weeks, four months and ten months from the beginning of treatment. The material from the second treatment plant was composted after four, ten weeks and a year of composting. In the samples taken, total nitrogen content was determined by the Kjeldahl method. The determination of the organic carbon content was carried out on a TOC analyser. The C:N ratio was then calculated.