Efficient cyclones clean the air, preventing the emission of coffeefines to the atmosphere Heat recovery systems can be installed to preheat the inlet drying air, whereby energy savings of 15 to 20 percent can be made As related in Chapter 4(Dryers )energy costs can be cut by recovering the spent grounds from the extractor plant, to produce a cheap fuel forsteam generation, if the boiler plant is normally fed by fossil fuels AGGLOMERATION This is carried out by wetting the instant dried powder with either water or coffee extract and after-drying in a fluidised bed dryer. The degree of agglomeration is controlled to give the product the appearance of regular ground coffee Agglomeration improves the solubility factor, and simulates fairly closely the appearance of freeze-dried coffee The Figure 8/2 shows a production line without agglomeration. A medium sized plant would perform as under Green coffee(10%moisture)input 595kg per hour Roasted coffee(6%moisture)input 520kg per hour Extract solids content(split extraction) 10/25% Green Coffee yield: 2.38 1 ratio 42% Concentrate solid Spray dried powder rate: @3%moisture. 250kg per hour Annual production: based on 270 days/6500 hours production time 1625tonnes An agglomeratorEfficient cyclones clean the air, preventing the emission of coffee fines to the atmosphere. Heat recovery systems can be installed to preheat the inlet drying air, whereby energy savings of 15 to 20 percent can be made. As related in Chapter 4 (Dryers) energy costs can be cut by recovering the spent grounds from the extractor plant, to produce a cheap fuel for steam generation, if the boiler plant is normally fed by fossil fuels. AGGLOMERATION This is carried out by wetting the instant dried powder with either water or coffee extract and after-drying in a fluidised bed dryer. The degree of agglomeration is controlled to give the product the appearance of regular ground coffee. Agglomeration improves the solubility factor, and simulates fairly closely the appearance of freeze-dried coffee. The Figure 8/2 shows a production line without agglomeration. A medium sized plant would perform as under: Green coffee (10% moisture) input 595kg per hour Roasted coffee (6% moisture) input 520kg per hour Extract solids content (split extraction) 10 / 25% Green Coffee yield: 2.38:l ratio = 42% Concentrate solid: 36% Spray Dried powder rate: @ 3% moisture. 250kg per hour Annual production: based on 270 days/6500 hours production time = 1625 tonnes. An agglomerator