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1995 Second Place Winner: Measure Filter Freeboard Safety, Effectively
Author(s) -
Witmeyer Gary
Publication year - 1995
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.1995.tb01271.x
Subject(s) - measure (data warehouse) , filter (signal processing) , computer science , safer , freeboard , task (project management) , gadget , simulation , telecommunications , engineering , algorithm , computer security , data mining , computer vision , systems engineering , fluidized bed , waste management
In the past, we measured the filter freeboard (the measurement from the top of the filter media to the top of the washwater trough) quarterly. To accomplish this task, we had to first drain the filter, then, standing on top of the washwater troughs, measure at various places to get an average. This practice was obviously hazardous because someone had to straddle the washwater troughs and enter a confined space to take the measurements. Adding to our difficulties, we did not have a good way to measure filter bed expansion during a filter backwash. We constructed a gadget to perform this task in a safer, more efficient manner. A list of materials and construction information is provided.