Study on ammonium removal in domestic wastewater from dormitory of national university of civil engineering
Abstract
Currently, there are 84 universities and institutes in Hanoi with the corresponding number of universities and institutes. There are also a number of dormitories with different scales ranging from a few hundred to several thousand students. Thus, the amount of wastewater from the dormitories is also relatively large. The wastewater discharge into water body without treatment, the pollutants in general and nitrogen in particular will seriously affect the environment. Base on these issues, the paper studied the problem of ammonium treatment in domestic wastewater from dormitory, experimental research in laboratory scale with real wastewater from dormitory of National University of Civil Engineering (NUCE). Treatment technology is partial nitritation combined with anaerobic anaerobic oxidation (anammox). Within the scope of this research, the papermention only to the anammox process, i.e, the wastewater was controlled suitable ratio of the ammonium to nitrite concentration for the anammox process. This paper does not mention about the partial nitritation process. The results showed that, with the operational time of 193 days, the influent T-N concentration fluctuated from 90-180 mgN/L, and T-Nremoval efficiency increased from 29.4% to 61.4% in stepwise. The concentrations of nitrogen compounds at the end of each experimental period is satisfied for the National Technical Regulation on domestic wastewater, QCVN 14:2008/MONRE, column B. This is a positive result for developmentof a pilot scale model for ammonium removal from domestic wastewater.
Keywords: Anammox; biomass carrier, domestic wastewater; NH4+-N; NO2-N.
Received: October 5th, 2017; revised: October 30th,2017; accepted: November 2nd, 2017
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