Complex Assessment of the Organomineral Fraction of Compost from SMW as a Potential Fertile Soil

Comprehensive studies on agrochemical, toxicological and microbiological evaluation of composts from solid municipal waste (SMW) (organomineral fraction less than 10 mm) produced at the Novy Svet-EKO landfill (Leningrad region) were carried out. The potential agronomic value of composts as fertile soil for plant growth in terms of the content of basic nutrients and acid-base properties was established. The degree of organic matter stabilization and readiness of composts for safe use were determined by the dynamics of their microbial respiration, indicators of nitrogen cycle processes and toxicity. The conclusion about the favorable agrochemical properties of SMW composts and the increased content of basic elements of plant nutrition (N, P, K) in them was made. Toxicological indicators of composts were studied, which allowed to assign them to IV–V classes of hazard (low-hazard and practically non-hazardous) in accordance with the MNR Order No. 536.