A Roadmap for Cleaner Brick Production in India - Red Ladrilleras

III.MethodologyDetails of the monitored kilns are provided in Table 2. Of the nine kilns, seven are located inIndia, and two – tunnel kiln and a modified VSBK – in Vietnam, as neither is in operation inIndia.Both these kilns rely to a large extent on internal fuel 6 and were expected to have lowerenvironmental footprint, especially in terms of emissions. The selection of Indian kilns wascarried out to cover major kiln types and fuel combinations prevalent in the country.Table 3 provides the list of technical parameters that were measured. In addition, fuel andclay samples were collected and analyzed from each of the monitored kilns. Business andprocess related information were collected through personal interviews with kiln owners.Location of the monitored kilns is shown in Figure 1Figure 1: Location of Monitored Kilns in India & Vietnam6 The practice of internal fuel is widely prevalent in China – the largest producer of brick in the world,accounting for almost 50% of the production – and Vietnam. In this process, powdered coal is added during thebrick forming operation and serves as a fuel during firing.8