Cashew Nut Industries Case Study

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Abstract- Cashew Nut Industries are under small scale/cottage sector under orange category without any effective pollution preventive techniques. The pollution from single unit has no major effect to environment but the pollution load from the cluster becomes culprit to environment. The source of different environmental pollutants emits in to the atmosphere during the processing by roasting process and cooking (steam roasting) process, the main pollutant is particulate matter (PM). This paper deals with the appraisal of Pollution load from the cashew nut processing units (cluster) and suggest techno-economic and air quality management for gaseous emissions from cashew cluster.

Keywords- Cluster, Particulate Matter (PM), suggestive methods.
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India processed about 1.19 million tonnes of raw cashew seeds through 3650 cashew processing industries in India around 5lakhs people are working. There are about 300 units in Nagercoil district, Tamilnadu, 270 units in Kollam district, Kerala and around 130 units in Palasa-Kasibugga, Andhra Pradesh. There are also small amount of these industries in Cheerla, Mangalore, Maharashtra, Odissa and few in Goa. The capital cost on the units is varying between 6-15lakhs. The cashew industry in India employed different unit operations/methodology for processing depends on variety of raw material, place, technological mechanization and availability of fixed energy supply. Commonly we have two methods for processing they are Roasting process and cooking process (steam …show more content…
To remove testa over the kernel and also control the moisture content in the kernels, they are exhibit to extended and controlled heating with hot air at 60-70°C for about 6-7 h in the drying chamber of Borma oven. About 5-8% of moisture is removed from the kernels in the procedure; this process is known as Borma. Indirect heating of atmospheric air generates the hot air over hot surface in an Oven. The Borma ovens are fired with cashew shell or de-oiled cashew cake. The ovens evolve the flue gases to environment. Sometimes it connected to main

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