WIT Press

Cement-Lock® Process For Waste Management And Energy Recovery


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WIT Press


A Goyal, M C Mensinger, S P Barone & A L Lee


Cement-Lock@ process for waste management and energy recovery A. Goyal1, M. C. Mensinger1, S. P. Barone2, A. L. Lee2 1 ENDESCO Services, Inc., USA. 2 Gas Technology Institute, USA. Abstract Cement-Lock' is a thermo-chemical manufacturing technology that transforms many different types of contaminated as well as non-contaminated wastes, soils, sludges, and sediments into electric power, steam, and construction-grade cement. In the process, the different wastes are blended together with proprietary modifiers in appropriate proportions and subjected to temperatures in the range of 2000o to 3000°F. Under these conditions, the wastes-modifiers mixture is converted to a homogeneous melt. The melt, called Ecomelt@, is cooled and finely ground and combined with other additives to produce construction-grade cement. The construction-grade cement has properties similar to those of ordinary portland cement. During Cement-Lock processing all organic contaminants are completely destroyed and converted to innocuous carbon dioxide and water. Chlorine and sulfur compounds are sequestered and heavy metals are locked within the molten matrix to completely immobilize them. Cement-Lock Technology can be a pivotal component of an overall waste management scheme by being incorporated into a petroleum refinery, a coal- fired power plant, or a wastewater treatment plant. Introduction As the world population increases and becomes concentrated in and around urban areas, the demand for habitable land and human services will drastically strain existing waste management systems. The quantities of wastes generated from construction and demolition, the chemical industry, healthcare, wastewater treatment plants, paper mills, refineries, incinerators, power plants, and contaminated sediments from lakes, rivers, and estuaries are all expected to