| Summary: | In this study, a heterotrophic denitrification was designed for domestic wastewater
treatment with unexpected water flows at different loading rates. Benefited from
excellent removal ability COD, shorten operating time and lower maintenance cost.
During the time of operation (six months), injection of nitrate was made in the influent
RALBI 1 while the RALBI 2 was fed with sewage without addition of nitrate. The
COD concentration in the influent of the two reactors was the same. This two reactors
(RALBI1 and RALBI2) were fed with real wastewater for 172 days at 6 h HRT, the
average COD removal were 71.55% and 54.82% for RALBI1 and RALBI2
respectively. The results showed that RALBI1 has good removal performance for COD
compared with RALBI2. This could be due the injected nitrate in RALBI1 whose
effect has further stimulated the activity of denitrifying bacteria.
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