Browsing by Author "CHIANG Ming-Kuei"

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METHOD AND DEVICE FOR TREATING WASTEWATER CONTAINING TETRAMETHYLAMMONIUM HYDROXIDE AND AMMONIUM NITROGEN
(2015-03-19)
LEE Der-Ming
;
CHIANG Ming-Kuei
;
CHEN Chin-Te
;
SUNG Keng-Chuan
;
LAN Chien-Ju
A method for treating wastewater containing TMAH and ammonium nitrogen includes the steps of (a) introducing a first solution which contains ammonium nitrogen but no TMAH into a single reactor with microorganisms comprising nitrifying bacteria and anammox bacteria, and denitrifying the first solution by the microorganisms under a dissolved oxygen concentration ranging from 0.1-0.5 mg/L and a pH value of 7-8; (b) when the denitrification efficiency reaches a steady state, introducing a second solution which contains ammonium nitrogen and TMAH and has a concentration of TMAH lower than 60 mg/L into the reactor; and (c) gradually increasing the concentration of TMAH in the solution to be added into the reactor for several times whenever the denitrification efficiency reaches a steady state. Accordingly, the inhibition of TMAH to the anammox bacteria can be significantly decreased, and both TMAH and the ammonium nitrogen can be treated simultaneously.