GEOC 33 |
| A small tube chip type of bio-carrier that was made of a mixture of polyethylene and inorganic materials was used to treat highly concentrated nitrogenous amine wastewater using packed-bed reactor, which was intended not only to reduce the high COD value but to release ammonium from amine compounds for subsequent nitrification. With 50 vol% of carrier charge inside the reactor, the amine wastewater could be effectively treated with 94% of COD removal efficiency at low organic loading rate (OLR) of 0.9 kgCOD/(m3•d). The removal efficiency decreased down to 84% as OLR increased to 8.22 kgCOD/(m3•d). A stable operation with 75% removal efficiency was observed even at 12.27 kgCOD/(m3•d) of OLR. The high concentration of ammonium released from decomposed amine could cause inhibitory effect to the microorganism due to the toxicity of free ammonia. Batch toxicity assays showed that biofilm was less sensitive to toxic compounds than sludge and could tolerate higher concentration of free ammonia. |
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The Biogeochemical Cycling of Nitrogen at Various Spatial and Temporal Scales
1:30 PM-4:40 PM, Monday, August 20, 2007 Boston Park Plaza -- St. James Rm, Oral
Sci-Mix
Division of Geochemistry |