Application of conductivity measurement to maturity index of composts from municipal sewage sludge estimation

Conductivity measurement method in water extracts from compost of aerobic municipal sewage sludge has been described. The experiment comprised of 2 variants of compost: aerobic municipal sewage sludge with straw and second variant with manure. The elements K+, Na+, Ca+2 and Mg+2 measured in the same water extracts were in ionic form therefore for estimation quantity changes of dissolved elements which results in quantity changes in dissolved substances, the conductivity measurement was applied in the studies. It means that water extracts from composts can be treated as water solutions of electrolytes which makes a specific kind of conductors.

REFERENCES (9)

Blanco M.-J., Almendros G.: Chemical transformation, phytotoxicity and nutrient availability in progressive composting stages of wheat straw. Plant and Soil, 196,1997,15-25.

Google Scholar

Fauci M.F., Bezdicek D.F., Caldwell D., Finch R.: End product quality and agronomic performance of compost. Compost Sci. & Utiliz., 7(2), 1999,17-29.

Google Scholar

Gonzalez-Vila F. J., Almendros G., Madrid F.: Molecular alterations of organic fractions from urban waste in the course of composting and their further transformation in amended soil. The Sci. of the Total Environ., 236, 1999, 215-229.

Google Scholar

Hackett G.A.R., Easton C.A., Duff S.J.B.; Composting of pulp and paper mill fly ash with wastewater treatment sludge. Biores. Techn., 70, 1999, 217-224.

Google Scholar

Hartz T. K., Giannini G: Duration of composting of yard wastes affects both physical and chemical characteristics of compost and plant growth. Hort Sci, 33(7), 1998,1192-1196.

Google Scholar

Korol J., Korol R.: Badania składu i właściwości osadów ściekowych. Dębe. Wyd. PIOS 1992.

Google Scholar

Michel Jr.F.C, Reddy C.A.: Effect of oxygenation level on yard trimmings composting rate, odor production, and compost quality in bench-scale reactors. Compost Sci. & Utiliz., 6(4), 1998,111-123.

Google Scholar

Negro M.J., Solano M.L., Ciria P., Carrasco J.: Composting of sweet sorghum bagasse with other wastes. Biores. Techn., 67, 1999, 89-92.

Google Scholar

Ozores-Hampton M., Stoffella P.J., Bewick T.A., Cantliffe D.J., Obreza T.A.: Effect of age of cocomposted MSW and biosolids on weed seed germination. Compost Sci. & Utiliz., 7(1), 1999, 51-57.

Google Scholar

Submit your paper

Instructions for Authors

eISSN:	2719-423X
ISSN:	1642-686X