Composting of sewage sludge and organic part of municipal solid waste

The article presents the results of studying the parameters of the process of composting sewage sludge with the OPMW (temperature, humidity, density, carbon to nitrogen ratio, organic matter content, acidity, total nitrogen, total phosphorus and total potassium) and the composition of the resulting compost.
The temperature and humidity indicators in the pile of urban SS and the OPMW corresponded to the optimal conditions for the vital activity of aerobic microorganisms participating in composting.
During the maturation of the compost, an increase in the density of the composted mixture and a decrease in the carbon to nitrogen ratio were observed. Also, during the process of biological oxidation in the composted mass, the concentration of organic matter decreased and the content of nutritional elements increased.
As a result of composting sewage sludge with the OPMW, compost was obtained that is suitable for use as an organic fertilizer for planting forestry crops along roads, in forest and ornamental nurseries, floriculture, landscaping, and in the reclamation of disturbed lands.

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