Yilan County, Jan. 14 (CNA) Environmental officials at the Yilan County government said Wednesday that their ongoing research has shown that the clinker produced by an incinerator in the county from burning household solid waste is good material for cement production.
The study has won recognition from the Yilan County government.
At a ceremony Wednesday to present awards to 12 outstanding local research programs, Yilan County Magistrate Lu Kuo-hua named the report by the team of environmental officials as the most outstanding.
Ma Chuan-tsung, director of the Waste Management Division under the Yilan County government's Bureau of Environmental Protection, said that similar research had already been conducted by a number of institutions in other countries, and that his division had begun the research program three years ago.
Ma said although the research is still in progress, a cement factory that analyzed the clinker found that its contents are similar to Portland cement and that the clinker meets Taiwan's national standards for cement production.
Portland cement is the most common type in general use around the world. The name is derived from its similarity to Portland stone, a type of building stone that was quarried on the Isle of Portland in Dorset, England.
According to Ma, Yilan County's incinerator produces about 80 metric tons of clinker each day. The solid residue can fill all four landfill sites in the county within nine years.
"If cement factories are willing to accept our clinker as production material, there will be no need for our county to find another landfill site in the next 25 years," he said.
Experts say that household waste is about 85 percent combustible, containing paper, plastic, and organic matter that will burn in waste incinerators to become fly ash and clinker.
Results of studies in other countries have also shown that the major components of ordinary Portland cement are present in the clinker produced by incinerators from burning municipal solid waste.
(By Han Nai-kuo)