APPLE CIDER 



21 



3' DIAM. MUSLIN TUBE 

 ENDS TIED 



COPPER FLY SCREEN 



FILTERED CIDER 



Figure 6. The Essential Elements of the Homemade Filter. 



The tube should be supported in the trough by a copper screen. This 

 allows free flow from the trough and makes the entire area of the tube 

 effective in filtering. The copper screen is preferable to iron wire screen 

 because it is less affected by fruit juices. 



It is necessary to have a small pressure head on the filter. This can be 

 satisfactorily secured by elevating the supply tank. The greater the 

 elevation the more rapid the flow will be from the filter. The net head 

 should not exceed 15 feet (with muslin tube) and eight feet results in 

 very satisfactory operation. Less head may be used where small quan- 

 tities are to be filtered, but will necessitate more frequent cleaning of 

 the collector. Tests with cider subjected to enzyme clarification gave the 

 following rates of filtration: 



