Removal of nitrogen compounds in slaughterhouse wastewater by using anaerobic ammonium oxidation process
Abstract
According to the planning of cattle and poultry slaughterhouse and processing systemup towards 2020, Hanoi city approvedwith 10 planned industrial slaughterhouse sites and 34 planned semi-industrial slaughterhouse sites. The amount of slaughterhouse wastewater is calculated of about 2,300-6,100 m3/ day, excluding wastewater from small and uncontrolled slaughterhouses. This research was implemented in the experimental lab-scale to evaluate ammonium removal capacity in slaughterhouse wastewater by combined process of partial nitritation and anaerobic ammonium oxidation (anammox). The real slaughterhouse wastewater was collected from ThinhAn slaughterhouse and organic matter as COD was removed by previous AnMBR. The influent NH4+ concentration was changed from 80 to 160 mg N/L. T-N loading rate of 0.1 to 0.25 kgT-N/m3/day with HRT was controlled from 36hrs to 10 hrs.The effluent NH4+-N concentration was always less than 10 mg N/L which satisfied the Column B of QCVN 40:2011/BTNMT - National Technical Regulation on Industrial Wastewater.
Keywords: Anammox; biomass carrier,slaughterhouse wastewater; NH4+-N; NO2-N.
Received: September 15th, 2017; revised: October 30th, 2017; accepted: November 2nd, 2017
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