Title: NH3 gas absorption and bio-oxidation in a single bioscrubber system
Abstract: Abstract A combined ammonia gas absorption and nitrification was conducted in a single bioscrubber. The reactor was consisted of a bubble column (gas absorption) and a packed bed (nitrification) which contained poly-urethane foams with immobilized nitrifying activated sludge. The entering gas and scrubbing liquid were contacted countercurrently. The bubble column elimination capacity (EC) was 26.74 g NH 3 /m 3 h at >99% ammonia gas removal and effluent gas concentration lower than 2 ppm v . Without ammonium supplement, EC can reach 35.66 g NH 3 /m 3 h which is equivalently the highest tolerable ammonia loading rate of 700 g N/m 3 day (1650 mg N/L) at the packed bed. At this level, 593 g N/m 3 -day ammonia removal rate was achieved via nitrification, dominated by ammonia oxidation. Partial recycling (R/Q = 0.5) of scrubbing solution reduced the secondary wastewater volume by producing 233% more concentrated nitrified products. Hydraulic retention time (HRT) of 24 h was found optimal for both processes (gas absorption and nitrification).
Publication Year: 2009
Publication Date: 2009-02-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 23
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