Keywords: co–processing, cement kilns, municipal solid waste, MSW, waste materials, cement production, solid waste management, public private partnerships, PPPs, Germany, India
Co–processing waste materials in cement production: experience from the past and future perspectives
The neglected, municipal solid waste management has become an important issue for national and local governments in developing countries in recent times, not only because of the tremendous rise of wastes but also of the resultant environmental degradation and rising public concern. Co–processing of waste in cement plants has been used as a treatment option for certain waste material in Europe, the USA and Japan, however, its application is not common in Asia. If properly applied, co–processing of waste material in cement kilns offers an environmentally sound and financially feasible option for an improved waste management. Within a public private partnership, the German Development Corporation (GIZ) and the cement company Holcim developed internationally recognised guidelines as a tool for promoting environmentally sound co–processing. These guidelines were recognised by the Secretary of the Basel Convention and have been applied in many countries worldwide, including India. Currently, the co–processing of non–recyclable left–overs from municipal solid waste in cement kilns in India is being explored. This paper details out the above.