engleski

Use of incinerated sewage sludge ash in concrete production

At the beginning of the twentieth century, about 10% of the world’s population lived in cities. By 2050, the global population is expected to reach between 8.3 and 10.9 billion. Rapid population growth and urbanization already has a dramatic effect on the increased demand for appropriate wastewater management. In Croatia, only about 43% of the population are connected to the public sewage network and only 23% are connected to the wastewater treatment plants with adequate level of treatment. By becoming the member state, Croatia has made the commitment to construct treatment plants of total capacities of 4.500.000PE (250.000.000 m3 of wastewater). This implies that annually about 250.000tons of dehydrated and stabilized sludge will be obtained and its further application needs to be investigated. The basic objective of the presented research is to explore the possibilities of recycling of the sewage sludge for preparation of innovative products in concrete industry. Physical and chemical characteristics of incinerated sewage sludge ash (ISSA) from different treatment plants are investigated, since the possibility of recycling sewage sludge depends a great deal on its composition. Obtained results imply that ISSA may be used in concrete production, partially substituting cement or as inert filler, depending on concrete requirements.

waste water treatment plants ; incinerated sewage sludge

nije evidentirano