biofilter media options / discussion
Posted: Thu Jul 12, 2007 12:29 pm
Hi Bob,
I apreciate alot the work you do. I think a thread about various options of biofilter media would be interesting.
Since I'll start experimenting a small (model) biofilter myself, here-s the type of media it will use.
The woven polypropylene bags used to pack cereals or cement are woven with a ~3mm wide ribbon. A 0.5x1m (1.65x3.3ft) bag provides 4 sqm (43sq.ft) area of ribbon.
Taking a bag apart in 700pcs 3ft long individual ribons, costs me 20-30 minutes. The resulting "wool" fills quite well in a 4 liter (1 gal) space, giving a surface ratio of 1000 sqm/m3 (305 sq ft/ cu ft)
Should also mention that one bag weighs only 58 grams (2 oz), and costs here $0.45 in small quantities.
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Initially I thought the ribbons are too soft , but when they are together in a random orientation at this density (of one bag worth of ribbon /gal), they-re quite stiff. My tests will show if they colapse under wheight when they are loaded with bacteria.
regards,
cezar
I apreciate alot the work you do. I think a thread about various options of biofilter media would be interesting.
Since I'll start experimenting a small (model) biofilter myself, here-s the type of media it will use.
The woven polypropylene bags used to pack cereals or cement are woven with a ~3mm wide ribbon. A 0.5x1m (1.65x3.3ft) bag provides 4 sqm (43sq.ft) area of ribbon.
Taking a bag apart in 700pcs 3ft long individual ribons, costs me 20-30 minutes. The resulting "wool" fills quite well in a 4 liter (1 gal) space, giving a surface ratio of 1000 sqm/m3 (305 sq ft/ cu ft)
Should also mention that one bag weighs only 58 grams (2 oz), and costs here $0.45 in small quantities.
------------
Initially I thought the ribbons are too soft , but when they are together in a random orientation at this density (of one bag worth of ribbon /gal), they-re quite stiff. My tests will show if they colapse under wheight when they are loaded with bacteria.
regards,
cezar