Foreword
India is the second largest cement producing country. In the last decade, installed production capacity of Indian cement industry has increased almost two fold (from 61 to 110 million tonnes / annum). At present, there are large cement plants in the country.

Air pollution is a major problem in cement industry. During the process of cement manufacture considerable amount of dust is emitted at almost every stage. For control of dust emission, the Central PollutiJn Control Board developed the emission standards tor cement industry in 1986. Since then, significant developments have taken place in terms of cement production as well as technologies. In order to develop a composite index for determining the performance of emission control systems, the Central Pollution Control Board commissioned a study on "Development of emission factors for cement industry". The study was conducted through the National Productivity Council, New Delhi.

Emission Factor is expressed as the weight of pollutant emitted per unit weight of production. The emission factor as developed for cement industry may be used as a tool for estimating quantum of dust emitted from different proc:esses, without performing actual source monitoring. Also, it can be used to predict the emission from proposed cement units.

I would like to thank the National Productivity Council to complete the study in time. I also appreciate the efforts made by my colleagues Shri P. K. Gupta and Shri Lalit Kapur co- ordinating the study, with the guidance of Dr, B. Sepgupta, Member Secretary, CPCB. Shri M. K. Gupta, DEO,

We hope, the document will be useful for the cement industry, regulatory agencies, research organisations, consultants and all those concerned with monitoring and control of pollution.