Influence of EM BIO™ on changes in contents of macroelements in the compost produced from municipal sewage sludge mixed with different components

Assessment of the influence the influence of EM BIOTM on changes in content of calcium, magnesium, potassium, acidity and dry mass, during composting of sewage sludge mixed with coniferous tree sawdust or wastepaper has been presented in the paper. In the composted material the main component was sewage sludge from a municipal wastewater in Nowogard. The two-factor experiment covered the following experimental factors: 1-type of composted material, 2-a dose of preparation-EM BIO (TM). Adding to the composted sewage sludge, sawdust of coniferous, wastepaper and EM BIO (TM) microbiological preparation resulted in a statistically significant increase in dry matter. On the basis of the changes of pH, calcium, magnesium, potassium and dry matter mineralization processes of organic compounds with the greatest intensity occurred in the sludge in conjunction with the composted wastepaper and a higher dose of microbial preparation EM BIO (TM).