EVALUATION OF THE POTENTIAL RISKS OF SEWAGE SLUDGE COMPOST ON THE SOIL-PLANTS SYSTEM
Journal Title: ISB-INMA TEH AGRICULTURAL AND MECHANICAL ENGINEERING - Year 2017, Vol 0, Issue 1
Abstract
The composting process is considered as an economically and environmentally viable alternative to hygienization and stabilization sewage sludge from small sewage treatment plants, from non-industrialized cities.The main purpose of the paper is to determine the degree of phytotoxicity as well as the quality parameters of the two compost mixes obtained from sewage sludge with cereal straw (CSSS), sewage sludge with shredded paper (SPSS) and a compost derived from household waste (HW). Normalized germination index values (NGI) for two dilutions (1:10 v/w and 1:20v/w) indicate low compost toxicity (SPSS) as demonstrated by the ATR-FTIR analysis, demonstrating the presence of polyethylene (PELD and PET) with decreased degradation level due to plastic paper. We note that for all three calculated quality indices (RSI, EI and DQI). significant values (p-value <0.001) are obtained when using the sewage sludge with cereal straw compost (CSSS) as the substrate.
Authors and Affiliations
Alexandru Grosu, V. Stan, P. M. Matei, I. D. Barbulescu, E. M. Dusa, R. M. Majdar, N. Vranceanu
Keywords
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