Recent years have seen significant increases in the average heating values of wastes in Central Europe. Essentially, this can be attributed to recycling measures, separate recovery of waste streams, and treatment and processing procedures in modified waste management concepts. As a result of the above and due to the increasingly frequent application of energy recovery procedures for commercial ...

Sewage sludge production increases continuously reaching almost 20% (946 700 t 1 118 795 tons of dry matters in 2007) during the (directly or after composting). The remaining 30% was incinerated (with or without household wastes) or landfilled. Nowadays, sludge reduction is a major concern. This activity has to becom be careful to the environmental impacts of sludge treatment and disposal route...

BACKGROUND The aim of this study was to determine the potential of produced compost from the sludge of wastewater treatment plant using earthworms and compare it with the vermicompost produced from household solid waste. METHODS In the current study, three treatments with the same conditions in terms of organic wastes type were prepared to produce vermicompost from household solid waste and s...

backgrounds and objectives:today, one of the most important environmental issues is solid waste produced in dentistry that because of the presence of hazardous, toxic and pathogen agents has special importance. in this survey, solid waste produced in hamadan dentistry laboratories and practical dentist offices is studied.materials and methods: in this descriptive study, from 24 dentistry labora...

The calorific value of household refuse (HR) is greatly improved after classification, which includes the implementation sufficient pyrolysis conditions. Therefore, a better effect can be achieved by co-pyrolysis with industrial solid waste (ISW) high value. In this work, HR and ISW were used as raw materials for experiments. influence on distribution three-phase products co-pyrolysis, concentr...